diff --git a/compiler/libpc300/sc1.c b/compiler/libpc300/sc1.c index 89c12f94..8f812384 100755 --- a/compiler/libpc300/sc1.c +++ b/compiler/libpc300/sc1.c @@ -1,5611 +1,5610 @@ -/* Pawn compiler - * - * Function and variable definition and declaration, statement parser. - * - * Copyright (c) ITB CompuPhase, 1997-2005 - * - * This software is provided "as-is", without any express or implied warranty. - * In no event will the authors be held liable for any damages arising from - * the use of this software. - * - * Permission is granted to anyone to use this software for any purpose, - * including commercial applications, and to alter it and redistribute it - * freely, subject to the following restrictions: - * - * 1. The origin of this software must not be misrepresented; you must not - * claim that you wrote the original software. If you use this software in - * a product, an acknowledgment in the product documentation would be - * appreciated but is not required. - * 2. Altered source versions must be plainly marked as such, and must not be - * misrepresented as being the original software. - * 3. This notice may not be removed or altered from any source distribution. - */ - -#include -#include -#include -#include -#include -#include -#include - -#if defined __WIN32__ || defined _WIN32 || defined __MSDOS__ - #include - #include -#endif - -#if defined LINUX || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__ - #include - #include /* from BinReloc, see www.autopackage.org */ - #include -#endif - -#if defined FORTIFY - #include "fortify.h" -#endif - -#if defined __BORLANDC__ || defined __WATCOMC__ - #include - static unsigned total_drives; /* dummy variable */ - #define dos_setdrive(i) _dos_setdrive(i,&total_drives) -#elif defined _MSC_VER && defined _WIN32 - #include /* for _chdrive() */ - #define dos_setdrive(i) _chdrive(i) -#endif -#if defined __BORLANDC__ - #include /* for chdir() */ -#elif defined __WATCOMC__ - #include /* for chdir() */ -#endif -#if defined __WIN32__ || defined _WIN32 || defined _Windows - #include -#endif - -#include - -#include "sc.h" -#define VERSION_STR "3.0.3367-amxx" -#define VERSION_INT 0x300 - -int pc_anytag; - -static void resetglobals(void); -static void initglobals(void); -static void setopt(int argc,char **argv,char *oname,char *ename,char *pname, - char *rname,char *codepage); -static void setconfig(char *root); -static void setcaption(void); -static void about(void); -static void setconstants(void); -static void parse(void); -static void dumplits(void); -static void dumpzero(int count); -static void declfuncvar(int fpublic,int fstatic,int fstock,int fconst); -static void declglb(char *firstname,int firsttag,int fpublic,int fstatic, - int stock,int fconst); -static int declloc(int fstatic); -static void decl_const(int table); -static void decl_enum(int table); -static cell needsub(int *tag,constvalue **enumroot); -static void initials(int ident,int tag,cell *size,int dim[],int numdim, - constvalue *enumroot); -static cell initarray(int ident,int tag,int dim[],int numdim,int cur, - int startlit,int counteddim[],constvalue *lastdim, - constvalue *enumroot,int *errorfound); -static cell initvector(int ident,int tag,cell size,int fillzero, - constvalue *enumroot,int *errorfound); -static cell init(int ident,int *tag,int *errorfound); -static void funcstub(int native); -static int newfunc(char *firstname,int firsttag,int fpublic,int fstatic,int stock); -static int declargs(symbol *sym); -static void doarg(char *name,int ident,int offset,int tags[],int numtags, - int fpublic,int fconst,arginfo *arg); -static void make_report(symbol *root,FILE *log,char *sourcefile); -static void reduce_referrers(symbol *root); -static long max_stacksize(symbol *root); -static int testsymbols(symbol *root,int level,int testlabs,int testconst); -static void destructsymbols(symbol *root,int level); -static constvalue *find_constval_byval(constvalue *table,cell val); -static void statement(int *lastindent,int allow_decl); -static void compound(int stmt_sameline); -static int doexpr(int comma,int chkeffect,int allowarray,int mark_endexpr, - int *tag,symbol **symptr,int chkfuncresult); -static void doassert(void); -static void doexit(void); -static void test(int label,int parens,int invert); -static void doif(void); -static void dowhile(void); -static void dodo(void); -static void dofor(void); -static void doswitch(void); -static void dogoto(void); -static void dolabel(void); -static symbol *fetchlab(char *name); -static void doreturn(void); -static void dobreak(void); -static void docont(void); -static void dosleep(void); -static void dostate(void); -static void addwhile(int *ptr); -static void delwhile(void); -static int *readwhile(void); -static void inst_datetime_defines(void); - -static int lastst = 0; /* last executed statement type */ -static int nestlevel = 0; /* number of active (open) compound statements */ -static int rettype = 0; /* the type that a "return" expression should have */ -static int skipinput = 0; /* number of lines to skip from the first input file */ -static int optproccall = TRUE; /* support "procedure call" */ -static int verbosity = 1; /* verbosity level, 0=quiet, 1=normal, 2=verbose */ -static int sc_reparse = 0; /* needs 3th parse because of changed prototypes? */ -static int sc_parsenum = 0; /* number of the extra parses */ -static int wq[wqTABSZ]; /* "while queue", internal stack for nested loops */ -static int *wqptr; /* pointer to next entry */ -#if !defined SC_LIGHT - static char *sc_documentation=NULL;/* main documentation */ -#endif -#if defined __WIN32__ || defined _WIN32 || defined _Windows - static HWND hwndFinish = 0; -#endif - -#if !defined NO_MAIN - -#if defined __TURBOC__ && !defined __32BIT__ - extern unsigned int _stklen = 0x2000; -#endif - -int main(int argc, char *argv[]) -{ - return pc_compile(argc,argv); -} - -/* pc_printf() - * Called for general purpose "console" output. This function prints general - * purpose messages; errors go through pc_error(). The function is modelled - * after printf(). - */ -int pc_printf(const char *message,...) -{ - int ret; - va_list argptr; - - va_start(argptr,message); - ret=vprintf(message,argptr); - va_end(argptr); - - return ret; -} - -/* pc_error() - * Called for producing error output. - * number the error number (as documented in the manual) - * message a string describing the error with embedded %d and %s tokens - * filename the name of the file currently being parsed - * firstline the line number at which the expression started on which - * the error was found, or -1 if there is no "starting line" - * lastline the line number at which the error was detected - * argptr a pointer to the first of a series of arguments (for macro - * "va_arg") - * Return: - * If the function returns 0, the parser attempts to continue compilation. - * On a non-zero return value, the parser aborts. - */ -int pc_error(int number,char *message,char *filename,int firstline,int lastline,va_list argptr) -{ -static char *prefix[3]={ "error", "fatal error", "warning" }; - - if (number!=0) { - char *pre; - - pre=prefix[number/100]; - if (firstline>=0) - fprintf(stderr,"%s(%d -- %d) : %s %03d: ",filename,firstline,lastline,pre,number); - else - fprintf(stderr,"%s(%d) : %s %03d: ",filename,lastline,pre,number); - } /* if */ - vfprintf(stderr,message,argptr); - fflush(stderr); - return 0; -} - -/* pc_opensrc() - * Opens a source file (or include file) for reading. The "file" does not have - * to be a physical file, one might compile from memory. - * filename the name of the "file" to read from - * Return: - * The function must return a pointer, which is used as a "magic cookie" to - * all I/O functions. When failing to open the file for reading, the - * function must return NULL. - * Note: - * Several "source files" may be open at the same time. Specifically, one - * file can be open for reading and another for writing. - */ -void *pc_opensrc(char *filename) -{ - return fopen(filename,"r"); -} - -/* pc_createsrc() - * Creates/overwrites a source file for writing. The "file" does not have - * to be a physical file, one might compile from memory. - * filename the name of the "file" to create - * Return: - * The function must return a pointer, which is used as a "magic cookie" to - * all I/O functions. When failing to open the file for reading, the - * function must return NULL. - * Note: - * Several "source files" may be open at the same time. Specifically, one - * file can be open for reading and another for writing. - */ -void *pc_createsrc(char *filename) -{ - return fopen(filename,"w"); -} - -/* pc_closesrc() - * Closes a source file (or include file). The "handle" parameter has the - * value that pc_opensrc() returned in an earlier call. - */ -void pc_closesrc(void *handle) -{ - assert(handle!=NULL); - fclose((FILE*)handle); -} - -/* pc_resetsrc() - * "position" may only hold a pointer that was previously obtained from - * pc_getpossrc() - */ -void pc_resetsrc(void *handle,void *position) -{ - assert(handle!=NULL); - fsetpos((FILE*)handle,(fpos_t *)position); -} - -/* pc_readsrc() - * Reads a single line from the source file (or up to a maximum number of - * characters if the line in the input file is too long). - */ -char *pc_readsrc(void *handle,unsigned char *target,int maxchars) -{ - return fgets((char*)target,maxchars,(FILE*)handle); -} - -/* pc_writesrc() - * Writes to to the source file. There is no automatic line ending; to end a - * line, write a "\n". - */ -int pc_writesrc(void *handle,unsigned char *source) -{ - return fputs((char*)source,(FILE*)handle) >= 0; -} - -void *pc_getpossrc(void *handle) -{ - static fpos_t lastpos; /* may need to have a LIFO stack of such positions */ - - fgetpos((FILE*)handle,&lastpos); - return &lastpos; -} - -int pc_eofsrc(void *handle) -{ - return feof((FILE*)handle); -} - -/* should return a pointer, which is used as a "magic cookie" to all I/O - * functions; return NULL for failure - */ -void *pc_openasm(char *filename) -{ - #if defined __MSDOS__ || defined SC_LIGHT - return fopen(filename,"w+"); - #else - return mfcreate(filename); - #endif -} - -void pc_closeasm(void *handle, int deletefile) -{ - #if defined __MSDOS__ || defined SC_LIGHT - if (handle!=NULL) - fclose((FILE*)handle); - if (deletefile) - remove(outfname); - #else - if (handle!=NULL) { - if (!deletefile) - mfdump((MEMFILE*)handle); - mfclose((MEMFILE*)handle); - } /* if */ - #endif -} - -void pc_resetasm(void *handle) -{ - assert(handle!=NULL); - #if defined __MSDOS__ || defined SC_LIGHT - fflush((FILE*)handle); - fseek((FILE*)handle,0,SEEK_SET); - #else - mfseek((MEMFILE*)handle,0,SEEK_SET); - #endif -} - -int pc_writeasm(void *handle,char *string) -{ - #if defined __MSDOS__ || defined SC_LIGHT - return fputs(string,(FILE*)handle) >= 0; - #else - return mfputs((MEMFILE*)handle,string); - #endif -} - -char *pc_readasm(void *handle, char *string, int maxchars) -{ - #if defined __MSDOS__ || defined SC_LIGHT - return fgets(string,maxchars,(FILE*)handle); - #else - return mfgets((MEMFILE*)handle,string,maxchars); - #endif -} - -/* Should return a pointer, which is used as a "magic cookie" to all I/O - * functions; return NULL for failure. - */ -void *pc_openbin(char *filename) -{ - return fopen(filename,"wb"); -} - -void pc_closebin(void *handle,int deletefile) -{ - fclose((FILE*)handle); - if (deletefile) - remove(binfname); -} - -/* pc_resetbin() - * Can seek to any location in the file. - * The offset is always from the start of the file. - */ -void pc_resetbin(void *handle,long offset) -{ - fflush((FILE*)handle); - fseek((FILE*)handle,offset,SEEK_SET); -} - -int pc_writebin(void *handle,void *buffer,int size) -{ - return (int)fwrite(buffer,1,size,(FILE*)handle) == size; -} - -long pc_lengthbin(void *handle) -{ - return ftell((FILE*)handle); -} - -#endif /* !defined NO_MAIN */ - -void inst_datetime_defines() -{ - char date[64]; - char ltime[64]; - time_t td; - struct tm *curtime; - - time(&td); - curtime = localtime(&td); - - strftime(date, 31, "\"%m/%d/%Y\"", curtime); - strftime(ltime, 31, "\"%H:%M:%S\"", curtime); - - insert_subst("__DATE__", date, 8); - insert_subst("__TIME__", ltime, 8); -} - - -/* "main" of the compiler - */ -#if defined __cplusplus - extern "C" -#endif -int pc_compile(int argc, char *argv[]) -{ - int entry,i,jmpcode; - int retcode; - char incfname[_MAX_PATH]; - char reportname[_MAX_PATH]; - char codepage[MAXCODEPAGE+1]; - FILE *binf; - void *inpfmark; - int lcl_packstr,lcl_needsemicolon,lcl_tabsize; - #if !defined SC_LIGHT - int hdrsize=0; - #endif - - /* set global variables to their initial value */ - binf=NULL; - initglobals(); - errorset(sRESET); - errorset(sEXPRRELEASE); - lexinit(); - - /* make sure that we clean up on a fatal error; do this before the first - * call to error(). */ - if ((jmpcode=setjmp(errbuf))!=0) - goto cleanup; - - /* allocate memory for fixed tables */ - inpfname=(char*)malloc(_MAX_PATH); - if (inpfname==NULL) - error(103); /* insufficient memory */ - litq=(cell*)malloc(litmax*sizeof(cell)); - if (litq==NULL) - error(103); /* insufficient memory */ - if (!phopt_init()) - error(103); /* insufficient memory */ - - setopt(argc,argv,outfname,errfname,incfname,reportname,codepage); - /* set output names that depend on the input name */ - if (sc_listing) - set_extension(outfname,".lst",TRUE); - else - set_extension(outfname,".asm",TRUE); - strcpy(binfname,outfname); - set_extension(binfname,".amx",TRUE); - if (strlen(errfname)!=0) - remove(errfname); /* delete file on startup */ - else if (verbosity>0) - setcaption(); - setconfig(argv[0]); /* the path to the include and codepage files */ - sc_ctrlchar_org=sc_ctrlchar; - lcl_packstr=sc_packstr; - lcl_needsemicolon=sc_needsemicolon; - lcl_tabsize=sc_tabsize; - #if !defined NO_CODEPAGE - if (!cp_set(codepage)) /* set codepage */ - error(108); /* codepage mapping file not found */ - #endif - /* optionally create a temporary input file that is a collection of all - * input files - */ - assert(get_sourcefile(0)!=NULL); /* there must be at least one source file */ - if (get_sourcefile(1)!=NULL) { - /* there are at least two or more source files */ - char *tname,*sname; - FILE *ftmp,*fsrc; - int fidx; - #if defined __WIN32__ || defined _WIN32 - tname=_tempnam(NULL,"pawn"); - #elif defined __MSDOS__ || defined _Windows - tname=tempnam(NULL,"pawn"); - #elif defined(MACOS) && !defined(__MACH__) - /* tempnam is not supported for the Macintosh CFM build. */ - error(104,get_sourcefile(1)); - tname=NULL; - sname=NULL; - #else - char *buffer = strdup(P_tmpdir "/pawn.XXXXXX"); - close(mkstemp(buffer)); - tname=buffer; - #endif - ftmp=(FILE*)pc_createsrc(tname); - for (fidx=0; (sname=get_sourcefile(fidx))!=NULL; fidx++) { - unsigned char tstring[128]; - fsrc=(FILE*)pc_opensrc(sname); - if (fsrc==NULL) - error(100,sname); - pc_writesrc(ftmp,(unsigned char*)"#file "); - pc_writesrc(ftmp,(unsigned char*)sname); - pc_writesrc(ftmp,(unsigned char*)"\n"); - while (!pc_eofsrc(fsrc)) { - pc_readsrc(fsrc,tstring,sizeof tstring); - pc_writesrc(ftmp,tstring); - } /* while */ - pc_closesrc(fsrc); - } /* for */ - pc_closesrc(ftmp); - strcpy(inpfname,tname); - free(tname); - } else { - strcpy(inpfname,get_sourcefile(0)); - } /* if */ - inpf_org=(FILE*)pc_opensrc(inpfname); - if (inpf_org==NULL) - error(100,inpfname); - freading=TRUE; - outf=(FILE*)pc_openasm(outfname); /* first write to assembler file (may be temporary) */ - if (outf==NULL) - error(101,outfname); - /* immediately open the binary file, for other programs to check */ - if (sc_asmfile || sc_listing) { - binf=NULL; - } else { - binf=(FILE*)pc_openbin(binfname); - if (binf==NULL) - error(101,binfname); - } /* if */ - setconstants(); /* set predefined constants and tagnames */ - for (i=0; i0) { - if (strcmp(incfname,sDEF_PREFIX)==0) { - plungefile(incfname,FALSE,TRUE); /* parse "default.inc" */ - } else { - if (!plungequalifiedfile(incfname)) /* parse "prefix" include file */ - error(100,incfname); /* cannot read from ... (fatal error) */ - } /* if */ - } /* if */ - preprocess(); /* fetch first line */ - parse(); /* process all input */ - sc_parsenum++; - } while (sc_reparse); - - /* second (or third) pass */ - sc_status=statWRITE; /* set, to enable warnings */ - state_conflict(&glbtab); - - /* write a report, if requested */ - #if !defined SC_LIGHT - if (sc_makereport) { - FILE *frep=stdout; - if (strlen(reportname)>0) - frep=fopen(reportname,"wb"); /* avoid translation of \n to \r\n in DOS/Windows */ - if (frep!=NULL) { - make_report(&glbtab,frep,get_sourcefile(0)); - if (strlen(reportname)>0) - fclose(frep); - } /* if */ - if (sc_documentation!=NULL) { - free(sc_documentation); - sc_documentation=NULL; - } /* if */ - } /* if */ - #endif - if (sc_listing) - goto cleanup; - - /* ??? for re-parsing the listing file instead of the original source - * file (and doing preprocessing twice): - * - close input file, close listing file - * - re-open listing file for reading (inpf) - * - open assembler file (outf) - */ - - /* reset "defined" flag of all functions and global variables */ - reduce_referrers(&glbtab); - delete_symbols(&glbtab,0,TRUE,FALSE); - #if !defined NO_DEFINE - delete_substtable(); - inst_datetime_defines(); - #endif - resetglobals(); - sc_ctrlchar=sc_ctrlchar_org; - sc_packstr=lcl_packstr; - sc_needsemicolon=lcl_needsemicolon; - sc_tabsize=lcl_tabsize; - errorset(sRESET); - /* reset the source file */ - inpf=inpf_org; - freading=TRUE; - pc_resetsrc(inpf,inpfmark); /* reset file position */ - fline=skipinput; /* reset line number */ - lexinit(); /* clear internal flags of lex() */ - sc_status=statWRITE; /* allow to write --this variable was reset by resetglobals() */ - writeleader(&glbtab); - insert_dbgfile(inpfname); - if (strlen(incfname)>0) { - if (strcmp(incfname,sDEF_PREFIX)==0) - plungefile(incfname,FALSE,TRUE); /* parse "default.inc" (again) */ - else - plungequalifiedfile(incfname); /* parse implicit include file (again) */ - } /* if */ - preprocess(); /* fetch first line */ - parse(); /* process all input */ - /* inpf is already closed when readline() attempts to pop of a file */ - writetrailer(); /* write remaining stuff */ - - entry=testsymbols(&glbtab,0,TRUE,FALSE); /* test for unused or undefined - * functions and variables */ - if (!entry) - error(13); /* no entry point (no public functions) */ - -cleanup: - if (inpf!=NULL) /* main source file is not closed, do it now */ - pc_closesrc(inpf); - /* write the binary file (the file is already open) */ - if (!(sc_asmfile || sc_listing) && errnum==0 && jmpcode==0) { - assert(binf!=NULL); - pc_resetasm(outf); /* flush and loop back, for reading */ - #if !defined SC_LIGHT - hdrsize= - #endif - assemble(binf,outf); /* assembler file is now input */ - } /* if */ - if (outf!=NULL) { - pc_closeasm(outf,!(sc_asmfile || sc_listing)); - outf=NULL; - } /* if */ - if (binf!=NULL) { - pc_closebin(binf,errnum!=0); - binf=NULL; - } /* if */ - - #if !defined SC_LIGHT - if (errnum==0 && strlen(errfname)==0) { - long stacksize=max_stacksize(&glbtab); - int flag_exceed=0; - if (sc_amxlimit > 0 && (long)(hdrsize+code_idx+glb_declared*sizeof(cell)+sc_stksize*sizeof(cell)) >= sc_amxlimit) - flag_exceed=1; - if ((sc_debug & sSYMBOLIC)!=0 || verbosity>=2 || stacksize+32>=(long)sc_stksize || flag_exceed) { - pc_printf("Header size: %8ld bytes\n", (long)hdrsize); - pc_printf("Code size: %8ld bytes\n", (long)code_idx); - pc_printf("Data size: %8ld bytes\n", (long)glb_declared*sizeof(cell)); - pc_printf("Stack/heap size: %8ld bytes\n", (long)sc_stksize*sizeof(cell)); - if (stacksize>0) - pc_printf("Estimated usage: %8ld bytes\n", stacksize*sizeof(cell)); - pc_printf("Total requirements:%8ld bytes\n", (long)hdrsize+(long)code_idx+(long)glb_declared*sizeof(cell)+(long)sc_stksize*sizeof(cell)); - } /* if */ - if (flag_exceed) - error(106,sc_amxlimit); /* this causes a jump back to label "cleanup" */ - } /* if */ - #endif - - if (inpfname!=NULL) { - if (get_sourcefile(1)!=NULL) - remove(inpfname); /* the "input file" was in fact a temporary file */ - free(inpfname); - } /* if */ - if (litq!=NULL) - free(litq); - phopt_cleanup(); - stgbuffer_cleanup(); - clearstk(); - assert(jmpcode!=0 || loctab.next==NULL);/* on normal flow, local symbols - * should already have been deleted */ - delete_symbols(&loctab,0,TRUE,TRUE); /* delete local variables if not yet - * done (i.e. on a fatal error) */ - delete_symbols(&glbtab,0,TRUE,TRUE); - delete_consttable(&tagname_tab); - delete_consttable(&libname_tab); - delete_consttable(&sc_automaton_tab); - delete_consttable(&sc_state_tab); - state_deletetable(); - delete_aliastable(); - delete_pathtable(); - delete_sourcefiletable(); - delete_dbgstringtable(); - #if !defined NO_DEFINE - delete_substtable(); - #endif - #if !defined SC_LIGHT - delete_docstringtable(); - if (sc_documentation!=NULL) - free(sc_documentation); - #endif - delete_autolisttable(); - if (errnum!=0) { - if (strlen(errfname)==0) - pc_printf("\n%d Error%s.\n",errnum,(errnum>1) ? "s" : ""); - retcode=2; - } else if (warnnum!=0){ - if (strlen(errfname)==0) - pc_printf("\n%d Warning%s.\n",warnnum,(warnnum>1) ? "s" : ""); - retcode=1; - } else { - retcode=jmpcode; - if (retcode==0 && verbosity>=2) - pc_printf("\nDone.\n"); - } /* if */ - #if defined __WIN32__ || defined _WIN32 || defined _Windows - if (IsWindow(hwndFinish)) - PostMessage(hwndFinish,RegisterWindowMessage("PawnNotify"),retcode,0L); - #endif - #if defined FORTIFY - Fortify_ListAllMemory(); - #endif - return retcode; -} - -#if defined __cplusplus - extern "C" -#endif -int pc_addconstant(char *name,cell value,int tag) -{ - errorset(sFORCESET); /* make sure error engine is silenced */ - sc_status=statIDLE; - add_constant(name,value,sGLOBAL,tag); - return 1; -} - -#if defined __cplusplus - extern "C" -#endif -int pc_addtag(char *name) -{ - cell val; - constvalue *ptr; - int last,tag; - - if (name==NULL) { - /* no tagname was given, check for one */ - if (lex(&val,&name)!=tLABEL) { - lexpush(); - return 0; /* untagged */ - } /* if */ - } /* if */ - - assert(strchr(name,':')==NULL); /* colon should already have been stripped */ - last=0; - ptr=tagname_tab.next; - while (ptr!=NULL) { - tag=(int)(ptr->value & TAGMASK); - if (strcmp(name,ptr->name)==0) - return tag; /* tagname is known, return its sequence number */ - tag &= (int)~FIXEDTAG; - if (tag>last) - last=tag; - ptr=ptr->next; - } /* while */ - - /* tagname currently unknown, add it */ - tag=last+1; /* guaranteed not to exist already */ - if (isupper(*name)) - tag |= (int)FIXEDTAG; - append_constval(&tagname_tab,name,(cell)tag,0); - return tag; -} - -static void resetglobals(void) -{ - /* reset the subset of global variables that is modified by the first pass */ - curfunc=NULL; /* pointer to current function */ - lastst=0; /* last executed statement type */ - nestlevel=0; /* number of active (open) compound statements */ - rettype=0; /* the type that a "return" expression should have */ - litidx=0; /* index to literal table */ - stgidx=0; /* index to the staging buffer */ - sc_labnum=0; /* top value of (internal) labels */ - staging=0; /* true if staging output */ - declared=0; /* number of local cells declared */ - glb_declared=0; /* number of global cells declared */ - code_idx=0; /* number of bytes with generated code */ - ntv_funcid=0; /* incremental number of native function */ - curseg=0; /* 1 if currently parsing CODE, 2 if parsing DATA */ - freading=FALSE; /* no input file ready yet */ - fline=0; /* the line number in the current file */ - fnumber=0; /* the file number in the file table (debugging) */ - fcurrent=0; /* current file being processed (debugging) */ - sc_intest=FALSE; /* true if inside a test */ - sideeffect=0; /* true if an expression causes a side-effect */ - stmtindent=0; /* current indent of the statement */ - indent_nowarn=FALSE; /* do not skip warning "217 loose indentation" */ - sc_allowtags=TRUE; /* allow/detect tagnames */ - sc_status=statIDLE; - sc_allowproccall=FALSE; - pc_addlibtable=TRUE; /* by default, add a "library table" to the output file */ - sc_alignnext=FALSE; - pc_docexpr=FALSE; -} - -static void initglobals(void) -{ - resetglobals(); - - sc_asmfile=FALSE; /* do not create .ASM file */ - sc_listing=FALSE; /* do not create .LST file */ - skipinput=0; /* number of lines to skip from the first input file */ - sc_ctrlchar=CTRL_CHAR;/* the escape character */ - litmax=sDEF_LITMAX; /* current size of the literal table */ - errnum=0; /* number of errors */ - warnnum=0; /* number of warnings */ - optproccall=TRUE; /* support "procedure call" */ -#if PAWN_CELL_SIZE==32 - verbosity=1; /* verbosity level, no copyright banner */ -#else - verbosity=0; -#endif - sc_debug=sCHKBOUNDS|sSYMBOLIC; /* by default: bounds checking+assertions */ - sc_packstr=FALSE; /* strings are unpacked by default */ - sc_compress=FALSE; - sc_needsemicolon=FALSE;/* semicolon required to terminate expressions? */ - sc_dataalign=sizeof(cell); - sc_stksize=sDEF_AMXSTACK;/* default stack size */ - sc_amxlimit=0; /* no limit on size of the abstract machine */ - sc_tabsize=8; /* assume a TAB is 8 spaces */ - sc_rationaltag=0; /* assume no support for rational numbers */ - rational_digits=0; /* number of fractional digits */ - - outfname[0]='\0'; /* output file name */ - errfname[0]='\0'; /* error file name */ - inpf=NULL; /* file read from */ - inpfname=NULL; /* pointer to name of the file currently read from */ - outf=NULL; /* file written to */ - litq=NULL; /* the literal queue */ - glbtab.next=NULL; /* clear global variables/constants table */ - loctab.next=NULL; /* " local " / " " */ - tagname_tab.next=NULL;/* tagname table */ - libname_tab.next=NULL;/* library table (#pragma library "..." syntax) */ - - pline[0]='\0'; /* the line read from the input file */ - lptr=NULL; /* points to the current position in "pline" */ - curlibrary=NULL; /* current library */ - inpf_org=NULL; /* main source file */ - - wqptr=wq; /* initialize while queue pointer */ - -#if !defined SC_LIGHT - sc_documentation=NULL; - sc_makereport=FALSE; /* do not generate a cross-reference report */ -#endif -} - -/* set_extension - * Set the default extension, or force an extension. To erase the - * extension of a filename, set "extension" to an empty string. - */ -SC_FUNC void set_extension(char *filename,char *extension,int force) -{ - char *ptr; - - assert(extension!=NULL && (*extension=='\0' || *extension=='.')); - assert(filename!=NULL); - ptr=strrchr(filename,'.'); - if (ptr!=NULL) { - /* ignore extension on a directory or at the start of the filename */ - if (strchr(ptr,DIRSEP_CHAR)!=NULL || ptr==filename || *(ptr-1)==DIRSEP_CHAR) - ptr=NULL; - } /* if */ - if (force && ptr!=NULL) - *ptr='\0'; /* set zero terminator at the position of the period */ - if (force || ptr==NULL) - strcat(filename,extension); -} - -static const char *option_value(const char *optptr) -{ - return (*(optptr+1)=='=' || *(optptr+1)==':') ? optptr+2 : optptr+1; -} - -static int toggle_option(const char *optptr, int option) -{ - switch (*option_value(optptr)) { - case '\0': - option=!option; - break; - case '-': - option=FALSE; - break; - case '+': - option=TRUE; - break; - default: - about(); - } /* switch */ - return option; -} - -/* Parsing command line options is indirectly recursive: parseoptions() - * calls parserespf() to handle options in a a response file and - * parserespf() calls parseoptions() at its turn after having created - * an "option list" from the contents of the file. - */ -static void parserespf(char *filename,char *oname,char *ename,char *pname, - char *rname, char *codepage); - -static void parseoptions(int argc,char **argv,char *oname,char *ename,char *pname, - char *rname, char *codepage) -{ - char str[_MAX_PATH],*name; - const char *ptr; - int arg,i,isoption; - - for (arg=1; arg 2 - sc_compress=toggle_option(ptr,sc_compress); - #else - about(); - #endif - break; - case 'c': - strncpy(codepage,option_value(ptr),MAXCODEPAGE); /* set name of codepage */ - codepage[MAXCODEPAGE]='\0'; - break; -#if defined dos_setdrive - case 'D': /* set active directory */ - ptr=option_value(ptr); - if (ptr[1]==':') - dos_setdrive(toupper(*ptr)-'A'+1); /* set active drive */ - chdir(ptr); - break; -#endif - case 'd': - switch (*option_value(ptr)) { - case '0': - sc_debug=0; - break; - case '1': - sc_debug=sCHKBOUNDS; /* assertions and bounds checking */ - break; - case '2': - sc_debug=sCHKBOUNDS | sSYMBOLIC; /* also symbolic info */ - break; - case '3': - sc_debug=sCHKBOUNDS | sSYMBOLIC | sNOOPTIMIZE; - /* also avoid peephole optimization */ - break; - default: - about(); - } /* switch */ - break; - case 'e': - strncpy(ename,option_value(ptr),_MAX_PATH); /* set name of error file */ - ename[_MAX_PATH-1]='\0'; - break; -#if defined __WIN32__ || defined _WIN32 || defined _Windows - case 'H': - hwndFinish=(HWND)atoi(option_value(ptr)); - if (!IsWindow(hwndFinish)) - hwndFinish=(HWND)0; - break; -#endif - case 'h': - sc_showincludes = 1; - break; - case 'i': - strncpy(str,option_value(ptr),sizeof str); /* set name of include directory */ - str[sizeof(str)-1]='\0'; - i=strlen(str); - if (i>0) { - if (str[i-1]!=DIRSEP_CHAR) { - str[i]=DIRSEP_CHAR; - str[i+1]='\0'; - } /* if */ - insert_path(str); - } /* if */ - break; - case 'l': - if (*(ptr+1)!='\0') - about(); - sc_listing=TRUE; /* skip second pass & code generation */ - break; - case 'o': - strncpy(oname,option_value(ptr),_MAX_PATH); /* set name of (binary) output file */ - oname[_MAX_PATH-1]='\0'; - break; - case 'p': - strncpy(pname,option_value(ptr),_MAX_PATH); /* set name of implicit include file */ - pname[_MAX_PATH-1]='\0'; - break; -#if !defined SC_LIGHT - case 'r': - strncpy(rname,option_value(ptr),_MAX_PATH); /* set name of report file */ - rname[_MAX_PATH-1]='\0'; - sc_makereport=TRUE; - if (strlen(rname)>0) { - set_extension(rname,".xml",FALSE); - } else if ((name=get_sourcefile(0))!=NULL) { - assert(strlen(rname)==0); - assert(strlen(name)<_MAX_PATH); - if ((ptr=strrchr(name,DIRSEP_CHAR))!=NULL) - ptr++; /* strip path */ - else - ptr=name; - assert(strlen(ptr)<_MAX_PATH); - strcpy(rname,ptr); - set_extension(rname,".xml",TRUE); - } /* if */ - break; -#endif - case 'S': - i=atoi(option_value(ptr)); - if (i>64) - sc_stksize=(cell)i; /* stack size has minimum size */ - else - about(); - break; - case 's': - skipinput=atoi(option_value(ptr)); - break; - case 't': - sc_tabsize=atoi(option_value(ptr)); - break; - case 'v': - verbosity= isdigit(*option_value(ptr)) ? atoi(option_value(ptr)) : 2; - break; - case 'w': - i=(int)strtol(option_value(ptr),(char **)&ptr,10); - if (*ptr=='-') - pc_enablewarning(i,0); - else if (*ptr=='+') - pc_enablewarning(i,1); - else if (*ptr=='\0') - pc_enablewarning(i,2); - break; - case 'X': - i=atoi(option_value(ptr)); - if (i>64) - sc_amxlimit=(cell)i; /* abstract machine size has minimum size */ - else - about(); - break; - case '\\': /* use \ instead for escape characters */ - sc_ctrlchar='\\'; - break; - case '^': /* use ^ instead for escape characters */ - sc_ctrlchar='^'; - break; - case ';': - sc_needsemicolon=toggle_option(ptr,sc_needsemicolon); - break; - case '(': - optproccall=!toggle_option(ptr,!optproccall); - break; - default: /* wrong option */ - about(); - } /* switch */ - } else if (argv[arg][0]=='@') { - #if !defined SC_LIGHT - parserespf(&argv[arg][1],oname,ename,pname,rname,codepage); - #endif - } else if ((ptr=strchr(argv[arg],'='))!=NULL) { - i=(int)(ptr-argv[arg]); - if (i>sNAMEMAX) { - i=sNAMEMAX; - error(200,argv[arg],sNAMEMAX); /* symbol too long, truncated to sNAMEMAX chars */ - } /* if */ - strncpy(str,argv[arg],i); - str[i]='\0'; /* str holds symbol name */ - i=atoi(ptr+1); - add_constant(str,i,sGLOBAL,0); - } else { - strncpy(str,argv[arg],sizeof(str)-5); /* -5 because default extension is 4 characters */ - str[sizeof(str)-5]='\0'; - set_extension(str,".p",FALSE); - insert_sourcefile(str); - /* The output name is the first input name with a different extension, - * but it is stored in a different directory - */ - if (strlen(oname)==0) { - if ((ptr=strrchr(str,DIRSEP_CHAR))!=NULL) - ptr++; /* strip path */ - else - ptr=str; - assert(strlen(ptr)<_MAX_PATH); - strcpy(oname,ptr); - } /* if */ - set_extension(oname,".asm",TRUE); -#if !defined SC_LIGHT - if (sc_makereport && strlen(rname)==0) { - if ((ptr=strrchr(str,DIRSEP_CHAR))!=NULL) - ptr++; /* strip path */ - else - ptr=str; - assert(strlen(ptr)<_MAX_PATH); - strcpy(rname,ptr); - set_extension(rname,".xml",TRUE); - } /* if */ -#endif - } /* if */ - } /* for */ -} - -#if !defined SC_LIGHT -static void parserespf(char *filename,char *oname,char *ename,char *pname, - char *rname,char *codepage) -{ -#define MAX_OPTIONS 100 - FILE *fp; - char *string, *ptr, **argv; - int argc; - long size; - - if ((fp=fopen(filename,"r"))==NULL) - error(100,filename); /* error reading input file */ - /* load the complete file into memory */ - fseek(fp,0L,SEEK_END); - size=ftell(fp); - fseek(fp,0L,SEEK_SET); - assert(size [filename...] [options]\n\n"); - pc_printf("Options:\n"); - pc_printf(" -A alignment in bytes of the data segment and the stack\n"); - pc_printf(" -a output assembler code\n"); -#if AMX_COMPACTMARGIN > 2 - pc_printf(" -C[+/-] compact encoding for output file (default=%c)\n", sc_compress ? '+' : '-'); -#endif - pc_printf(" -c codepage name or number; e.g. 1252 for Windows Latin-1\n"); -#if defined dos_setdrive - pc_printf(" -Dpath active directory path\n"); -#endif - pc_printf(" -d0 no symbolic information, no run-time checks\n"); - pc_printf(" -d1 [default] run-time checks, no symbolic information\n"); - pc_printf(" -d2 full debug information and dynamic checking\n"); - pc_printf(" -d3 full debug information, dynamic checking, no optimization\n"); - pc_printf(" -e set name of error file (quiet compile)\n"); -#if defined __WIN32__ || defined _WIN32 || defined _Windows - pc_printf(" -H window handle to send a notification message on finish\n"); -#endif - pc_printf(" -i path for include files\n"); - pc_printf(" -l create list file (preprocess only)\n"); - pc_printf(" -o set base name of (P-code) output file\n"); - pc_printf(" -p set name of \"prefix\" file\n"); -#if !defined SC_LIGHT - pc_printf(" -r[name] write cross reference report to console or to specified file\n"); -#endif - pc_printf(" -S stack/heap size in cells (default=%d)\n",(int)sc_stksize); - pc_printf(" -s skip lines from the input file\n"); - pc_printf(" -t TAB indent size (in character positions, default=%d)\n",sc_tabsize); - pc_printf(" -v verbosity level; 0=quiet, 1=normal, 2=verbose (default=%d)\n",verbosity); - pc_printf(" -w disable a specific warning by its number\n"); - pc_printf(" -X abstract machine size limit in bytes\n"); - pc_printf(" -\\ use '\\' for escape characters\n"); - pc_printf(" -^ use '^' for escape characters\n"); - pc_printf(" -;[+/-] require a semicolon to end each statement (default=%c)\n", sc_needsemicolon ? '+' : '-'); - pc_printf(" -([+/-] require parantheses for function invocation (default=%c)\n", optproccall ? '-' : '+'); - pc_printf(" sym=val define constant \"sym\" with value \"val\"\n"); - pc_printf(" sym= define constant \"sym\" with value 0\n"); -#if defined __WIN32__ || defined _WIN32 || defined _Windows || defined __MSDOS__ - pc_printf("\nOptions may start with a dash or a slash; the options \"-d0\" and \"/d0\" are\n"); - pc_printf("equivalent.\n"); -#endif - pc_printf("\nOptions with a value may optionally separate the value from the option letter\n"); - pc_printf("with a colon (\":\") or an equal sign (\"=\"). That is, the options \"-d0\", \"-d=0\"\n"); - pc_printf("and \"-d:0\" are all equivalent.\n"); - } /* if */ - longjmp(errbuf,3); /* user abort */ -} - -static void setconstants(void) -{ - int debug; - - assert(sc_status==statIDLE); - append_constval(&tagname_tab,"_",0,0);/* "untagged" */ - append_constval(&tagname_tab,"bool",1,0); - - add_constant("true",1,sGLOBAL,1); /* boolean flags */ - add_constant("false",0,sGLOBAL,1); - add_constant("EOS",0,sGLOBAL,0); /* End Of String, or '\0' */ - #if PAWN_CELL_SIZE==16 - add_constant("cellbits",16,sGLOBAL,0); - #if defined _I16_MAX - add_constant("cellmax",_I16_MAX,sGLOBAL,0); - add_constant("cellmin",_I16_MIN,sGLOBAL,0); - #else - add_constant("cellmax",SHRT_MAX,sGLOBAL,0); - add_constant("cellmin",SHRT_MIN,sGLOBAL,0); - #endif - #elif PAWN_CELL_SIZE==32 - add_constant("cellbits",32,sGLOBAL,0); - #if defined _I32_MAX - add_constant("cellmax",_I32_MAX,sGLOBAL,0); - add_constant("cellmin",_I32_MIN,sGLOBAL,0); - #else - add_constant("cellmax",LONG_MAX,sGLOBAL,0); - add_constant("cellmin",LONG_MIN,sGLOBAL,0); - #endif - #elif PAWN_CELL_SIZE==64 - add_constant("cellbits",64,sGLOBAL,0); - add_constant("cellmax",_I64_MAX,sGLOBAL,0); - add_constant("cellmin",_I64_MIN,sGLOBAL,0); - #else - #error Unsupported cell size - #endif - add_constant("charbits",sCHARBITS,sGLOBAL,0); - add_constant("charmin",0,sGLOBAL,0); - add_constant("charmax",~(-1 << sCHARBITS) - 1,sGLOBAL,0); - add_constant("ucharmax",(1 << (sizeof(cell)-1)*8)-1,sGLOBAL,0); - - add_constant("__Pawn",VERSION_INT,sGLOBAL,0); - - pc_anytag=pc_addtag("any"); - - debug=0; - if ((sc_debug & (sCHKBOUNDS | sSYMBOLIC))==(sCHKBOUNDS | sSYMBOLIC)) - debug=2; - else if ((sc_debug & sCHKBOUNDS)==sCHKBOUNDS) - debug=1; - add_constant("debug",debug,sGLOBAL,0); - - append_constval(&sc_automaton_tab,"",0,0); /* anonymous automaton */ -} - -static int getclassspec(int initialtok,int *fpublic,int *fstatic,int *fstock,int *fconst) -{ - int tok,err; - cell val; - char *str; - - assert(fconst!=NULL); - assert(fstock!=NULL); - assert(fstatic!=NULL); - assert(fpublic!=NULL); - *fconst=FALSE; - *fstock=FALSE; - *fstatic=FALSE; - *fpublic=FALSE; - switch (initialtok) { - case tCONST: - *fconst=TRUE; - break; - case tSTOCK: - *fstock=TRUE; - break; - case tSTATIC: - *fstatic=TRUE; - break; - case tPUBLIC: - *fpublic=TRUE; - break; - } /* switch */ - - err=0; - do { - tok=lex(&val,&str); /* read in (new) token */ - switch (tok) { - case tCONST: - if (*fconst) - err=42; /* invalid combination of class specifiers */ - *fconst=TRUE; - break; - case tSTOCK: - if (*fstock) - err=42; /* invalid combination of class specifiers */ - *fstock=TRUE; - break; - case tSTATIC: - if (*fstatic) - err=42; /* invalid combination of class specifiers */ - *fstatic=TRUE; - break; - case tPUBLIC: - if (*fpublic) - err=42; /* invalid combination of class specifiers */ - *fpublic=TRUE; - break; - default: - lexpush(); - tok=0; /* force break out of loop */ - } /* switch */ - } while (tok && err==0); - - /* extra checks */ - if (*fstatic && *fpublic) { - err=42; /* invalid combination of class specifiers */ - *fstatic=*fpublic=FALSE; - } /* if */ - - if (err) - error(err); - return err==0; -} - -/* parse - process all input text - * - * At this level, only static declarations and function definitions are legal. - */ -static void parse(void) -{ - int tok,fconst,fstock,fstatic,fpublic; - cell val; - char *str; - - while (freading){ - /* first try whether a declaration possibly is native or public */ - tok=lex(&val,&str); /* read in (new) token */ - switch (tok) { - case 0: - /* ignore zero's */ - break; - case tNEW: - if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) - declglb(NULL,0,fpublic,fstatic,fstock,fconst); - break; - case tSTATIC: - /* This can be a static function or a static global variable; we know - * which of the two as soon as we have parsed up to the point where an - * opening paranthesis of a function would be expected. To back out after - * deciding it was a declaration of a static variable after all, we have - * to store the symbol name and tag. - */ - if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) { - assert(!fpublic); - declfuncvar(fpublic,fstatic,fstock,fconst); - } /* if */ - break; - case tCONST: - decl_const(sGLOBAL); - break; - case tENUM: - decl_enum(sGLOBAL); - break; - case tPUBLIC: - /* This can be a public function or a public variable; see the comment - * above (for static functions/variables) for details. - */ - if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) { - assert(!fstatic); - declfuncvar(fpublic,fstatic,fstock,fconst); - } /* if */ - break; - case tSTOCK: - /* This can be a stock function or a stock *global*) variable; see the - * comment above (for static functions/variables) for details. - */ - if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) { - assert(fstock); - declfuncvar(fpublic,fstatic,fstock,fconst); - } /* if */ - break; - case tLABEL: - case tSYMBOL: - case tOPERATOR: - lexpush(); - if (!newfunc(NULL,-1,FALSE,FALSE,FALSE)) { - error(10); /* illegal function or declaration */ - lexclr(TRUE); /* drop the rest of the line */ - litidx=0; /* drop the literal queue too */ - } /* if */ - break; - case tNATIVE: - funcstub(TRUE); /* create a dummy function */ - break; - case tFORWARD: - funcstub(FALSE); - break; - case '}': - error(54); /* unmatched closing brace */ - break; - case '{': - error(55); /* start of function body without function header */ - break; - default: - if (freading) { - error(10); /* illegal function or declaration */ - lexclr(TRUE); /* drop the rest of the line */ - litidx=0; /* drop any literal arrays (strings) */ - } /* if */ - } /* switch */ - } /* while */ -} - -/* dumplits - * - * Dump the literal pool (strings etc.) - * - * Global references: litidx (referred to only) - */ -static void dumplits(void) -{ - int j,k; - - k=0; - while (k=litidx) - stgwrite("\n"); /* force a newline after 10 dumps */ - /* Note: stgwrite() buffers a line until it is complete. It recognizes - * the end of line as a sequence of "\n\0", so something like "\n\t" - * so should not be passed to stgwrite(). - */ - } /* while */ - } /* while */ -} - -/* dumpzero - * - * Dump zero's for default initial values - */ -static void dumpzero(int count) -{ - int i; - - if (count<=0) - return; - assert(curseg==2); - defstorage(); - i=0; - while (count-- > 0) { - outval(0, FALSE); - i=(i+1) % 16; - stgwrite((i==0 || count==0) ? "\n" : " "); - if (i==0 && count>0) - defstorage(); - } /* while */ -} - -static void aligndata(int numbytes) -{ - assert(numbytes % sizeof(cell) == 0); /* alignment must be a multiple of - * the cell size */ - assert(numbytes!=0); - - if ((((glb_declared+litidx)*sizeof(cell)) % numbytes)!=0) { - while ((((glb_declared+litidx)*sizeof(cell)) % numbytes)!=0) - litadd(0); - } /* if */ - -} - -#if !defined SC_LIGHT -/* sc_attachdocumentation() - * appends documentation comments to the passed-in symbol, or to a global - * string if "sym" is NULL. - */ -void sc_attachdocumentation(symbol *sym) -{ - int line; - size_t length; - char *str,*doc; - - if (!sc_makereport || sc_status!=statFIRST || sc_parsenum>0) { - /* just clear the entire table */ - delete_docstringtable(); - return; - } /* if */ - /* in the case of state functions, multiple documentation sections may - * appear; we should concatenate these - */ - assert(sym==NULL || sym->documentation==NULL || sym->states!=NULL); - - /* first check the size */ - length=0; - for (line=0; (str=get_docstring(line))!=NULL && *str!=sDOCSEP; line++) { - if (length>0) - length++; /* count 1 extra for a separating space */ - length+=strlen(str); - } /* for */ - if (sym==NULL && sc_documentation!=NULL) { - length += strlen(sc_documentation) + 1 + 4; /* plus 4 for "

" */ - assert(length>strlen(sc_documentation)); - } /* if */ - - if (length>0) { - /* allocate memory for the documentation */ - if (sym!=NULL && sym->documentation!=NULL) - length+=strlen(sym->documentation) + 1 + 4;/* plus 4 for "

" */ - doc=(char*)malloc((length+1)*sizeof(char)); - if (doc!=NULL) { - /* initialize string or concatenate */ - if (sym==NULL && sc_documentation!=NULL) { - strcpy(doc,sc_documentation); - strcat(doc,"

"); - } else if (sym!=NULL && sym->documentation!=NULL) { - strcpy(doc,sym->documentation); - strcat(doc,"

"); - free(sym->documentation); - sym->documentation=NULL; - } else { - doc[0]='\0'; - } /* if */ - /* collect all documentation */ - while ((str=get_docstring(0))!=NULL && *str!=sDOCSEP) { - if (doc[0]!='\0') - strcat(doc," "); - strcat(doc,str); - delete_docstring(0); - } /* while */ - if (str!=NULL) { - /* also delete the separator */ - assert(*str==sDOCSEP); - delete_docstring(0); - } /* if */ - if (sym!=NULL) { - assert(sym->documentation==NULL); - sym->documentation=doc; - } else { - if (sc_documentation!=NULL) - free(sc_documentation); - sc_documentation=doc; - } /* if */ - } /* if */ - } else { - /* delete an empty separator, if present */ - if ((str=get_docstring(0))!=NULL && *str==sDOCSEP) - delete_docstring(0); - } /* if */ -} - -static void insert_docstring_separator(void) -{ - char sep[2]={sDOCSEP,'\0'}; - insert_docstring(sep); -} -#else - #define sc_attachdocumentation(s) (void)(s) - #define insert_docstring_separator() -#endif - -static void declfuncvar(int fpublic,int fstatic,int fstock,int fconst) -{ - char name[sNAMEMAX+11]; - int tok,tag; - char *str; - cell val; - int invalidfunc; - - tag=pc_addtag(NULL); - tok=lex(&val,&str); - /* if we arrived here, this may not be a declaration of a native function - * or variable - */ - if (tok==tNATIVE) { - error(42); /* invalid combination of class specifiers */ - return; - } /* if */ - - if (tok!=tSYMBOL && tok!=tOPERATOR) { - lexpush(); - needtoken(tSYMBOL); - lexclr(TRUE); /* drop the rest of the line */ - litidx=0; /* drop the literal queue too */ - return; - } /* if */ - if (tok==tOPERATOR) { - lexpush(); /* push "operator" keyword back (for later analysis) */ - if (!newfunc(NULL,tag,fpublic,fstatic,fstock)) { - error(10); /* illegal function or declaration */ - lexclr(TRUE); /* drop the rest of the line */ - litidx=0; /* drop the literal queue too */ - } /* if */ - } else { - /* so tok is tSYMBOL */ - assert(strlen(str)<=sNAMEMAX); - strcpy(name,str); - /* only variables can be "const" or both "public" and "stock" */ - invalidfunc= fconst || (fpublic && fstock); - if (invalidfunc || !newfunc(name,tag,fpublic,fstatic,fstock)) { - /* if not a function, try a global variable */ - declglb(name,tag,fpublic,fstatic,fstock,fconst); - } /* if */ - } /* if */ -} - -/* declglb - declare global symbols - * - * Declare a static (global) variable. Global variables are stored in - * the DATA segment. - * - * global references: glb_declared (altered) - */ -static void declglb(char *firstname,int firsttag,int fpublic,int fstatic,int fstock,int fconst) -{ - int ident,tag,ispublic; - int idxtag[sDIMEN_MAX]; - char name[sNAMEMAX+1]; - cell val,size,cidx; - char *str; - int dim[sDIMEN_MAX]; - int numdim; - short filenum; - symbol *sym; - constvalue *enumroot; - #if !defined NDEBUG - cell glbdecl=0; - #endif - - assert(!fpublic || !fstatic); /* may not both be set */ - insert_docstring_separator(); /* see comment in newfunc() */ - filenum=fcurrent; /* save file number at the start of the declaration */ - do { - size=1; /* single size (no array) */ - numdim=0; /* no dimensions */ - ident=iVARIABLE; - if (firstname!=NULL) { - assert(strlen(firstname)<=sNAMEMAX); - strcpy(name,firstname); /* save symbol name */ - tag=firsttag; - firstname=NULL; - } else { - tag=pc_addtag(NULL); - if (lex(&val,&str)!=tSYMBOL) /* read in (new) token */ - error(20,str); /* invalid symbol name */ - assert(strlen(str)<=sNAMEMAX); - strcpy(name,str); /* save symbol name */ - } /* if */ - sym=findglb(name); - if (sym==NULL) - sym=findconst(name); - if (sym!=NULL && (sym->usage & uDEFINE)!=0) - error(21,name); /* symbol already defined */ - ispublic=fpublic; - if (name[0]==PUBLIC_CHAR) { - ispublic=TRUE; /* implicitly public variable */ - assert(!fstatic); - } /* if */ - while (matchtoken('[')) { - ident=iARRAY; - if (numdim == sDIMEN_MAX) { - error(53); /* exceeding maximum number of dimensions */ - return; - } /* if */ - size=needsub(&idxtag[numdim],&enumroot); /* get size; size==0 for "var[]" */ - #if INT_MAX < LONG_MAX - if (size > INT_MAX) - error(105); /* overflow, exceeding capacity */ - #endif - if (ispublic) - error(56,name); /* arrays cannot be public */ - dim[numdim++]=(int)size; - } /* while */ - /* if this variable is never used (which can be detected only in the - * second stage), shut off code generation - */ - cidx=0; /* only to avoid a compiler warning */ - if (sc_status==statWRITE && sym!=NULL && (sym->usage & (uREAD | uWRITTEN))==0) { - sc_status=statSKIP; - cidx=code_idx; - #if !defined NDEBUG - glbdecl=glb_declared; - #endif - } /* if */ - begdseg(); /* real (initialized) data in data segment */ - assert(litidx==0); /* literal queue should be empty */ - if (sc_alignnext) { - litidx=0; - aligndata(sc_dataalign); - dumplits(); /* dump the literal queue */ - sc_alignnext=FALSE; - litidx=0; /* global initial data is dumped, so restart at zero */ - } /* if */ - assert(litidx==0); /* literal queue should be empty (again) */ - initials(ident,tag,&size,dim,numdim,enumroot);/* stores values in the literal queue */ - assert(size>=litidx); - if (numdim==1) - dim[0]=(int)size; - dumplits(); /* dump the literal queue */ - dumpzero((int)size-litidx); - litidx=0; - if (sym==NULL) { /* define only if not yet defined */ - sym=addvariable(name,sizeof(cell)*glb_declared,ident,sGLOBAL,tag, - dim,numdim,idxtag); - } else { /* if declared but not yet defined, adjust the variable's address */ - sym->addr=sizeof(cell)*glb_declared; - sym->codeaddr=code_idx; - sym->usage|=uDEFINE; - } /* if */ - if (ispublic) - sym->usage|=uPUBLIC; - if (fconst) - sym->usage|=uCONST; - if (fstock) - sym->usage|=uSTOCK; - if (fstatic) - sym->fnumber=filenum; - sc_attachdocumentation(sym);/* attach any documenation to the variable */ - if (sc_status==statSKIP) { - sc_status=statWRITE; - code_idx=cidx; - assert(glb_declared==glbdecl); - } else { - glb_declared+=(int)size; /* add total number of cells */ - } /* if */ - } while (matchtoken(',')); /* enddo */ /* more? */ - needtoken(tTERM); /* if not comma, must be semicolumn */ -} - -/* declloc - declare local symbols - * - * Declare local (automatic) variables. Since these variables are relative - * to the STACK, there is no switch to the DATA segment. These variables - * cannot be initialized either. - * - * global references: declared (altered) - * funcstatus (referred to only) - */ -static int declloc(int fstatic) -{ - int ident,tag; - int idxtag[sDIMEN_MAX]; - char name[sNAMEMAX+1]; - symbol *sym; - constvalue *enumroot; - cell val,size; - char *str; - value lval = {0}; - int cur_lit=0; - int dim[sDIMEN_MAX]; - int numdim; - int fconst; - int staging_start=0; - - fconst=matchtoken(tCONST); - do { - ident=iVARIABLE; - size=1; - numdim=0; /* no dimensions */ - tag=pc_addtag(NULL); - if (lex(&val,&str)!=tSYMBOL) /* read in (new) token */ - error(20,str); /* invalid symbol name */ - assert(strlen(str)<=sNAMEMAX); - strcpy(name,str); /* save symbol name */ - if (name[0]==PUBLIC_CHAR) - error(56,name); /* local variables cannot be public */ - /* Note: block locals may be named identical to locals at higher - * compound blocks (as with standard C); so we must check (and add) - * the "nesting level" of local variables to verify the - * multi-definition of symbols. - */ - if ((sym=findloc(name))!=NULL && sym->compound==nestlevel) - error(21,name); /* symbol already defined */ - /* Although valid, a local variable whose name is equal to that - * of a global variable or to that of a local variable at a lower - * level might indicate a bug. - * NOTE - don't bother with the error if there's no valid function! - */ - if (((sym=findloc(name))!=NULL && sym->compound!=nestlevel) || findglb(name)!=NULL) - if (curfunc!=NULL && (curfunc->usage & uNATIVE)) - error(219,name); /* variable shadows another symbol */ - while (matchtoken('[')){ - ident=iARRAY; - if (numdim == sDIMEN_MAX) { - error(53); /* exceeding maximum number of dimensions */ - return ident; - } /* if */ - size=needsub(&idxtag[numdim],&enumroot); /* get size; size==0 for "var[]" */ - #if INT_MAX < LONG_MAX - if (size > INT_MAX) - error(105); /* overflow, exceeding capacity */ - #endif - dim[numdim++]=(int)size; - } /* while */ - if (ident==iARRAY || fstatic) { - if (sc_alignnext) { - aligndata(sc_dataalign); - sc_alignnext=FALSE; - } /* if */ - cur_lit=litidx; /* save current index in the literal table */ - initials(ident,tag,&size,dim,numdim,enumroot); - if (size==0) - return ident; /* error message already given */ - if (numdim==1) - dim[0]=(int)size; - } /* if */ - /* reserve memory (on the stack) for the variable */ - if (fstatic) { - /* write zeros for uninitialized fields */ - while (litidxusage & uNATIVE)==0); - if (curfunc->x.stacksizex.stacksize=declared+1; /* +1 for PROC opcode */ - } /* if */ - /* now that we have reserved memory for the variable, we can proceed - * to initialize it */ - assert(sym!=NULL); /* we declared it, it must be there */ - sym->compound=nestlevel; /* for multiple declaration/shadowing check */ - if (fconst) - sym->usage|=uCONST; - if (!fstatic) { /* static variables already initialized */ - if (ident==iVARIABLE) { - /* simple variable, also supports initialization */ - int ctag = tag; /* set to "tag" by default */ - int explicit_init=FALSE;/* is the variable explicitly initialized? */ - if (matchtoken('=')) { - doexpr(FALSE,FALSE,FALSE,FALSE,&ctag,NULL,TRUE); - explicit_init=TRUE; - } else { - ldconst(0,sPRI); /* uninitialized variable, set to zero */ - } /* if */ - /* now try to save the value (still in PRI) in the variable */ - lval.sym=sym; - lval.ident=iVARIABLE; - lval.constval=0; - lval.tag=tag; - check_userop(NULL,ctag,lval.tag,2,NULL,&ctag); - store(&lval); - markexpr(sEXPR,NULL,0); /* full expression ends after the store */ - assert(staging); /* end staging phase (optimize expression) */ - stgout(staging_start); - stgset(FALSE); - if (!matchtag(tag,ctag,TRUE)) - error(213); /* tag mismatch */ - /* if the variable was not explicitly initialized, reset the - * "uWRITTEN" flag that store() set */ - if (!explicit_init) - sym->usage &= ~uWRITTEN; - } else { - /* an array */ - assert(cur_lit>=0 && cur_lit<=litidx && litidx<=litmax); - /* if the array is not completely filled, set all values to zero first */ - assert(size>0 && size>=sym->dim.array.length); - assert(numdim>1 || size==sym->dim.array.length); - if (litidx-cur_lit < size) - fillarray(sym,size*sizeof(cell),0); - if (cur_lit=0 && cur<=numdim); - if (cur==numdim) - return 0; - return dim[cur]+(dim[cur]*calc_arraysize(dim,numdim,cur+1)); -} - -static cell adjust_indirectiontables(int dim[],int numdim,int cur,cell increment, - int startlit,constvalue *lastdim,int *skipdim) -{ -static int base; - int d; - cell accum; - - assert(cur>=0 && cur=0); - assert(cur>0 && startlit==-1 || startlit>=0 && startlit<=litidx); - if (cur==0) - base=startlit; - if (cur==numdim-1) - return 0; - /* 2 or more dimensions left, fill in an indirection vector */ - assert(dim[cur]>0); - if (dim[cur+1]>0) { - for (d=0; dnext; d<*skipdim; d++,ld=ld->next) { - assert(ld!=NULL); - } /* for */ - for (d=0; dname,NULL,16)==d); - litq[base++]=(dim[cur]+accum+increment) * sizeof(cell); - accum+=ld->value-1; - *skipdim+=1; - ld=ld->next; - } /* for */ - } /* if */ - /* create the indirection tables for the lower level */ - if (cur+2=dim[cur]) { - error(18); /* initialization data exceeds array size */ - break; - } /* if */ - if (cur+20) { - if (idxcounteddim[cur]) - error(18); /* initialization data exceeds declared size */ - } /* if */ - counteddim[cur]=idx; - - return totalsize+dim[cur]; /* size of sub-arrays + indirection vector */ -} - -/* initvector - * Initialize a single dimensional array - */ -static cell initvector(int ident,int tag,cell size,int fillzero, - constvalue *enumroot,int *errorfound) -{ - cell prev1=0,prev2=0; - int ellips=FALSE; - int curlit=litidx; - int rtag,ctag; - - assert(ident==iARRAY || ident==iREFARRAY); - if (matchtoken('{')) { - constvalue *enumfield=(enumroot!=NULL) ? enumroot->next : NULL; - do { - int fieldlit=litidx; - int matchbrace,i; - if (matchtoken('}')) { /* to allow for trailing ',' after the initialization */ - lexpush(); - break; - } /* if */ - if ((ellips=matchtoken(tELLIPS))!=0) - break; - /* for enumeration fields, allow another level of braces ("{...}") */ - matchbrace=0; /* preset */ - ellips=0; - if (enumfield!=NULL) - matchbrace=matchtoken('{'); - for ( ;; ) { - prev2=prev1; - prev1=init(ident,&ctag,errorfound); - if (!matchbrace) - break; - if ((ellips=matchtoken(tELLIPS))!=0) - break; - if (!matchtoken(',')) { - needtoken('}'); - break; - } /* for */ - } /* for */ - /* if this array is based on an enumeration, fill the "field" up with - * zeros, and toggle the tag - */ - if (enumroot!=NULL && enumfield==NULL) - error(227); /* more initiallers than enum fields */ - rtag=tag; /* preset, may be overridden by enum field tag */ - if (enumfield!=NULL) { - cell step; - symbol *symfield=findconst(enumfield->name); - assert(symfield!=NULL); - assert(fieldlitsymfield->dim.array.length) - error(228); /* length of initialler exceeds size of the enum field */ - if (ellips) { - step=prev1-prev2; - } else { - step=0; - prev1=0; - } /* if */ - for (i=litidx-fieldlit; idim.array.length; i++) { - prev1+=step; - litadd(prev1); - } /* for */ - rtag=symfield->x.idxtag; /* set the expected tag to the index tag */ - enumfield=enumfield->next; - } /* if */ - if (!matchtag(rtag,ctag,TRUE)) - error(213); /* tag mismatch */ - } while (matchtoken(',')); /* do */ - needtoken('}'); - } else { - init(ident,&ctag,errorfound); - if (!matchtag(tag,ctag,TRUE)) - error(213); /* tagname mismatch */ - } /* if */ - /* fill up the literal queue with a series */ - if (ellips) { - cell step=((litidx-curlit)==1) ? (cell)0 : prev1-prev2; - if (size==0 || (litidx-curlit)==0) - error(41); /* invalid ellipsis, array size unknown */ - else if ((litidx-curlit)==(int)size) - error(18); /* initialisation data exceeds declared size */ - while ((litidx-curlit)<(int)size) { - prev1+=step; - litadd(prev1); - } /* while */ - } /* if */ - if (fillzero && size>0) { - while ((litidx-curlit)<(int)size) - litadd(0); - } /* if */ - if (size==0) { - size=litidx-curlit; /* number of elements defined */ - } else if (litidx-curlit>(int)size) { /* e.g. "myvar[3]={1,2,3,4};" */ - error(18); /* initialisation data exceeds declared size */ - litidx=(int)size+curlit; /* avoid overflow in memory moves */ - } /* if */ - return size; -} - -/* init - * - * Evaluate one initializer. - */ -static cell init(int ident,int *tag,int *errorfound) -{ - cell i = 0; - - if (matchtoken(tSTRING)){ - /* lex() automatically stores strings in the literal table (and - * increases "litidx") */ - if (ident==iVARIABLE) { - error(6); /* must be assigned to an array */ - litidx=1; /* reset literal queue */ - } /* if */ - *tag=0; - } else if (constexpr(&i,tag,NULL)){ - litadd(i); /* store expression result in literal table */ - } else { - if (errorfound!=NULL) - *errorfound=TRUE; - } /* if */ - return i; -} - -/* needsub - * - * Get required array size - */ -static cell needsub(int *tag,constvalue **enumroot) -{ - cell val; - symbol *sym; - - assert(tag!=NULL); - *tag=0; - if (enumroot!=NULL) - *enumroot=NULL; /* preset */ - if (matchtoken(']')) /* we have already seen "[" */ - return 0; /* zero size (like "char msg[]") */ - - constexpr(&val,tag,&sym); /* get value (must be constant expression) */ - if (val<0) { - error(9); /* negative array size is invalid; assumed zero */ - val=0; - } /* if */ - needtoken(']'); - - if (enumroot!=NULL) { - /* get the field list for an enumeration */ - assert(*enumroot==NULL);/* should have been preset */ - assert(sym==NULL || sym->ident==iCONSTEXPR); - if (sym!=NULL && (sym->usage & uENUMROOT)==uENUMROOT) { - assert(sym->dim.enumlist!=NULL); - *enumroot=sym->dim.enumlist; - } /* if */ - } /* if */ - - return val; /* return array size */ -} - -/* decl_const - declare a single constant - * - */ -static void decl_const(int vclass) -{ - char constname[sNAMEMAX+1]; - cell val; - char *str; - int tag,exprtag; - int symbolline; - symbol *sym; - - insert_docstring_separator(); /* see comment in newfunc() */ - tag=pc_addtag(NULL); - if (lex(&val,&str)!=tSYMBOL) /* read in (new) token */ - error(20,str); /* invalid symbol name */ - symbolline=fline; /* save line where symbol was found */ - strcpy(constname,str); /* save symbol name */ - needtoken('='); - constexpr(&val,&exprtag,NULL);/* get value */ - needtoken(tTERM); - /* add_constant() checks for duplicate definitions */ - if (!matchtag(tag,exprtag,FALSE)) { - /* temporarily reset the line number to where the symbol was defined */ - int orgfline=fline; - fline=symbolline; - error(213); /* tagname mismatch */ - fline=orgfline; - } /* if */ - sym=add_constant(constname,val,vclass,tag); - if (sym!=NULL) - sc_attachdocumentation(sym);/* attach any documenation to the function */ -} - -/* decl_enum - declare enumerated constants - * - */ -static void decl_enum(int vclass) -{ - char enumname[sNAMEMAX+1],constname[sNAMEMAX+1]; - cell val,value,size; - char *str; - int tok,tag,explicittag; - cell increment,multiplier; - constvalue *enumroot; - symbol *enumsym; - - /* get an explicit tag, if any (we need to remember whether an explicit - * tag was passed, even if that explicit tag was "_:", so we cannot call - * pc_addtag() here - */ - if (lex(&val,&str)==tLABEL) { - tag=pc_addtag(str); - explicittag=TRUE; - } else { - lexpush(); - tag=0; - explicittag=FALSE; - } /* if */ - - /* get optional enum name (also serves as a tag if no explicit tag was set) */ - if (lex(&val,&str)==tSYMBOL) { /* read in (new) token */ - strcpy(enumname,str); /* save enum name (last constant) */ - if (!explicittag) - tag=pc_addtag(enumname); - } else { - lexpush(); /* analyze again */ - enumname[0]='\0'; - } /* if */ - - /* get increment and multiplier */ - increment=1; - multiplier=1; - if (matchtoken('(')) { - if (matchtoken(taADD)) { - constexpr(&increment,NULL,NULL); - } else if (matchtoken(taMULT)) { - constexpr(&multiplier,NULL,NULL); - } else if (matchtoken(taSHL)) { - constexpr(&val,NULL,NULL); - while (val-->0) - multiplier*=2; - } /* if */ - needtoken(')'); - } /* if */ - - if (strlen(enumname)>0) { - /* already create the root symbol, so the fields can have it as their "parent" */ - enumsym=add_constant(enumname,0,vclass,tag); - if (enumsym!=NULL) - enumsym->usage |= uENUMROOT; - /* start a new list for the element names */ - if ((enumroot=(constvalue*)malloc(sizeof(constvalue)))==NULL) - error(103); /* insufficient memory (fatal error) */ - memset(enumroot,0,sizeof(constvalue)); - } else { - enumsym=NULL; - enumroot=NULL; - } /* if */ - - needtoken('{'); - /* go through all constants */ - value=0; /* default starting value */ - do { - int idxtag,fieldtag; - symbol *sym; - if (matchtoken('}')) { /* quick exit if '}' follows ',' */ - lexpush(); - break; - } /* if */ - idxtag=pc_addtag(NULL); /* optional explicit item tag */ - tok=lex(&val,&str); /* read in (new) token */ - if (tok!=tSYMBOL) - error(20,str); /* invalid symbol name */ - strcpy(constname,str); /* save symbol name */ - size=increment; /* default increment of 'val' */ - if (matchtoken('[')) { - constexpr(&size,&fieldtag,NULL); /* get size */ - needtoken(']'); - } /* if */ - if (matchtoken('=')) - constexpr(&value,NULL,NULL); /* get value */ - /* add_constant() checks whether a variable (global or local) or - * a constant with the same name already exists - */ - sym=add_constant(constname,value,vclass,tag); - if (sym==NULL) - continue; /* error message already given */ - /* set the item tag and the item size, for use in indexing arrays */ - sym->x.idxtag=idxtag; - sym->fieldtag=fieldtag; - sym->dim.array.length=size; - sym->dim.array.level=0; - sym->parent=enumsym; - /* add the constant to a separate list as well */ - if (enumroot!=NULL) { - sym->usage |= uENUMFIELD; - append_constval(enumroot,constname,value,0); - } /* if */ - if (multiplier==1) - value+=size; - else - value*=size*multiplier; - } while (matchtoken(',')); - needtoken('}'); /* terminates the constant list */ - matchtoken(';'); /* eat an optional ; */ - - /* set the enum name to the "next" value (typically the last value plus one) */ - if (enumsym!=NULL) { - assert((enumsym->usage & uENUMROOT)!=0); - enumsym->addr=value; - /* assign the constant list */ - assert(enumroot!=NULL); - enumsym->dim.enumlist=enumroot; - sc_attachdocumentation(enumsym); /* attach any documenation to the enumeration */ - } /* if */ -} - -static int getstates(const char *funcname) -{ - char fsaname[sNAMEMAX+1],statename[sNAMEMAX+1]; - cell val; - char *str; - constvalue *automaton; - constvalue *state; - int fsa,islabel; - int *list; - int count,listsize,state_id; - - if (!matchtoken('<')) - return 0; - if (matchtoken('>')) - return -1; /* special construct: all other states (fall-back) */ - - count=0; - listsize=0; - list=NULL; - fsa=-1; - - do { - if (!(islabel=matchtoken(tLABEL)) && !needtoken(tSYMBOL)) - break; - tokeninfo(&val,&str); - assert(strlen(str)=0 && automaton->index!=fsa) - error(83,funcname); /* multiple automatons for a single function */ - fsa=automaton->index; - } /* if */ - state=state_add(statename,fsa); - /* add this state to the state combination list (it will be attached to the - * automaton later) */ - state_buildlist(&list,&listsize,&count,(int)state->value); - } while (matchtoken(',')); - needtoken('>'); - - if (count>0) { - assert(automaton!=NULL); - assert(fsa>=0); - state_id=state_addlist(list,count,fsa); - assert(state_id>0); - } else { - /* error is already given */ - state_id=0; - } /* if */ - if (list!=NULL) - free(list); - - return state_id; -} - -static void attachstatelist(symbol *sym, int state_id) -{ - assert(sym!=NULL); - if ((sym->usage & uDEFINE)!=0 && (sym->states==NULL || state_id==0)) - error(21,sym->name); /* function already defined, either without states or the current definition has no states */ - - if (state_id!=0) { - /* add the state list id */ - constvalue *stateptr; - if (sym->states==NULL) { - if ((sym->states=(constvalue*)malloc(sizeof(constvalue)))==NULL) - error(103); /* insufficient memory (fatal error) */ - memset(sym->states,0,sizeof(constvalue)); - } /* if */ - /* see whether the id already exists (add new state only if it does not - * yet exist - */ - assert(sym->states!=NULL); - for (stateptr=sym->states->next; stateptr!=NULL && stateptr->index!=state_id; stateptr=stateptr->next) - /* nothing */; - assert(state_id<=SHRT_MAX); - if (stateptr==NULL) - append_constval(sym->states,"",code_idx,(short)state_id); - else if (stateptr->value==0) - stateptr->value=code_idx; - else - error(84,sym->name); - /* also check for another conflicting situation: a fallback function - * without any states - */ - if (state_id==-1 && sc_status!=statFIRST) { - /* in the second round, all states should have been accumulated */ - assert(sym->states!=NULL); - for (stateptr=sym->states->next; stateptr!=NULL && stateptr->index==-1; stateptr=stateptr->next) - /* nothing */; - if (stateptr==NULL) - error(85,sym->name); /* no states are defined for this function */ - } /* if */ - } /* if */ -} - -/* - * Finds a function in the global symbol table or creates a new entry. - * It does some basic processing and error checking. - */ -SC_FUNC symbol *fetchfunc(char *name,int tag) -{ - symbol *sym; - - if ((sym=findglb(name))!=0) { /* already in symbol table? */ - if (sym->ident!=iFUNCTN) { - error(21,name); /* yes, but not as a function */ - return NULL; /* make sure the old symbol is not damaged */ - } else if ((sym->usage & uNATIVE)!=0) { - error(21,name); /* yes, and it is a native */ - } /* if */ - assert(sym->vclass==sGLOBAL); - if ((sym->usage & uPROTOTYPED)!=0 && sym->tag!=tag) - error(25); /* mismatch from earlier prototype */ - if ((sym->usage & uDEFINE)==0) { - /* as long as the function stays undefined, update the address and the tag */ - if (sym->states==NULL) - sym->addr=code_idx; - sym->tag=tag; - } /* if */ - } else { - /* don't set the "uDEFINE" flag; it may be a prototype */ - sym=addsym(name,code_idx,iFUNCTN,sGLOBAL,tag,0); - assert(sym!=NULL); /* fatal error 103 must be given on error */ - /* assume no arguments */ - sym->dim.arglist=(arginfo*)malloc(1*sizeof(arginfo)); - sym->dim.arglist[0].ident=0; - /* set library ID to NULL (only for native functions) */ - sym->x.lib=NULL; - /* set the required stack size to zero (only for non-native functions) */ - sym->x.stacksize=1; /* 1 for PROC opcode */ - } /* if */ - - return sym; -} - -/* This routine adds symbolic information for each argument. - */ -static void define_args(void) -{ - symbol *sym; - - /* At this point, no local variables have been declared. All - * local symbols are function arguments. - */ - sym=loctab.next; - while (sym!=NULL) { - assert(sym->ident!=iLABEL); - assert(sym->vclass==sLOCAL); - markexpr(sLDECL,sym->name,sym->addr); /* mark for better optimization */ - sym=sym->next; - } /* while */ -} - -static int operatorname(char *name) -{ - int opertok; - char *str; - cell val; - - assert(name!=NULL); - - /* check the operator */ - opertok=lex(&val,&str); - switch (opertok) { - case '+': - case '-': - case '*': - case '/': - case '%': - case '>': - case '<': - case '!': - case '~': - case '=': - name[0]=(char)opertok; - name[1]='\0'; - break; - case tINC: - strcpy(name,"++"); - break; - case tDEC: - strcpy(name,"--"); - break; - case tlEQ: - strcpy(name,"=="); - break; - case tlNE: - strcpy(name,"!="); - break; - case tlLE: - strcpy(name,"<="); - break; - case tlGE: - strcpy(name,">="); - break; - default: - name[0]='\0'; - error(7); /* operator cannot be redefined (or bad operator name) */ - return 0; - } /* switch */ - - return opertok; -} - -static int operatoradjust(int opertok,symbol *sym,char *opername,int resulttag) -{ - int tags[2]={0,0}; - int count=0; - arginfo *arg; - char tmpname[sNAMEMAX+1]; - symbol *oldsym; - - if (opertok==0) - return TRUE; - - assert(sym!=NULL && sym->ident==iFUNCTN && sym->dim.arglist!=NULL); - /* count arguments and save (first two) tags */ - while (arg=&sym->dim.arglist[count], arg->ident!=0) { - if (count<2) { - if (arg->numtags>1) - error(65,count+1); /* function argument may only have a single tag */ - else if (arg->numtags==1) - tags[count]=arg->tags[0]; - } /* if */ - if (opertok=='~' && count==0) { - if (arg->ident!=iREFARRAY) - error(73,arg->name);/* must be an array argument */ - } else { - if (arg->ident!=iVARIABLE) - error(66,arg->name);/* must be non-reference argument */ - } /* if */ - if (arg->hasdefault) - error(59,arg->name); /* arguments of an operator may not have a default value */ - count++; - } /* while */ - - /* for '!', '++' and '--', count must be 1 - * for '-', count may be 1 or 2 - * for '=', count must be 1, and the resulttag is also important - * for all other (binary) operators and the special '~' operator, count must be 2 - */ - switch (opertok) { - case '!': - case '=': - case tINC: - case tDEC: - if (count!=1) - error(62); /* number or placement of the operands does not fit the operator */ - break; - case '-': - if (count!=1 && count!=2) - error(62); /* number or placement of the operands does not fit the operator */ - break; - default: - if (count!=2) - error(62); /* number or placement of the operands does not fit the operator */ - } /* switch */ - - if (tags[0]==0 && ((opertok!='=' && tags[1]==0) || (opertok=='=' && resulttag==0))) - error(64); /* cannot change predefined operators */ - - /* change the operator name */ - assert(strlen(opername)>0); - operator_symname(tmpname,opername,tags[0],tags[1],count,resulttag); - if ((oldsym=findglb(tmpname))!=NULL) { - int i; - if ((oldsym->usage & uDEFINE)!=0) { - char errname[2*sNAMEMAX+16]; - funcdisplayname(errname,tmpname); - error(21,errname); /* symbol already defined */ - } /* if */ - sym->usage|=oldsym->usage; /* copy flags from the previous definition */ - for (i=0; inumrefers; i++) - if (oldsym->refer[i]!=NULL) - refer_symbol(sym,oldsym->refer[i]); - delete_symbol(&glbtab,oldsym); - } /* if */ - strcpy(sym->name,tmpname); - sym->hash=namehash(sym->name);/* calculate new hash */ - - /* operators should return a value, except the '~' operator */ - if (opertok!='~') - sym->usage |= uRETVALUE; - - return TRUE; -} - -static int check_operatortag(int opertok,int resulttag,char *opername) -{ - assert(opername!=NULL && strlen(opername)>0); - switch (opertok) { - case '!': - case '<': - case '>': - case tlEQ: - case tlNE: - case tlLE: - case tlGE: - if (resulttag!=pc_addtag("bool")) { - error(63,opername,"bool:"); /* operator X requires a "bool:" result tag */ - return FALSE; - } /* if */ - break; - case '~': - if (resulttag!=0) { - error(63,opername,"_:"); /* operator "~" requires a "_:" result tag */ - return FALSE; - } /* if */ - break; - } /* switch */ - return TRUE; -} - -static char *tag2str(char *dest,int tag) -{ - tag &= TAGMASK; - assert(tag>=0); - sprintf(dest,"0%x",tag); - return isdigit(dest[1]) ? &dest[1] : dest; -} - -SC_FUNC char *operator_symname(char *symname,char *opername,int tag1,int tag2,int numtags,int resulttag) -{ - char tagstr1[10], tagstr2[10]; - int opertok; - - assert(numtags>=1 && numtags<=2); - opertok= (opername[1]=='\0') ? opername[0] : 0; - if (opertok=='=') - sprintf(symname,"%s%s%s",tag2str(tagstr1,resulttag),opername,tag2str(tagstr2,tag1)); - else if (numtags==1 || opertok=='~') - sprintf(symname,"%s%s",opername,tag2str(tagstr1,tag1)); - else - sprintf(symname,"%s%s%s",tag2str(tagstr1,tag1),opername,tag2str(tagstr2,tag2)); - return symname; -} - -static int parse_funcname(char *fname,int *tag1,int *tag2,char *opname) -{ - char *ptr,*name; - int unary; - - /* tags are only positive, so if the function name starts with a '-', - * the operator is an unary '-' or '--' operator. - */ - if (*fname=='-') { - *tag1=0; - unary=TRUE; - ptr=fname; - } else { - *tag1=(int)strtol(fname,&ptr,16); - unary= ptr==fname; /* unary operator if it doesn't start with a tag name */ - } /* if */ - assert(!unary || *tag1==0); - assert(*ptr!='\0'); - for (name=opname; !isdigit(*ptr); ) - *name++ = *ptr++; - *name='\0'; - *tag2=(int)strtol(ptr,NULL,16); - return unary; -} - -static constvalue *find_tag_byval(int tag) -{ - constvalue *tagsym; - tagsym=find_constval_byval(&tagname_tab,tag & ~PUBLICTAG); - if (tagsym==NULL) - tagsym=find_constval_byval(&tagname_tab,tag | PUBLICTAG); - return tagsym; -} - -SC_FUNC char *funcdisplayname(char *dest,char *funcname) -{ - int tags[2]; - char opname[10]; - constvalue *tagsym[2]; - int unary; - - if (isalpha(*funcname) || *funcname=='_' || *funcname==PUBLIC_CHAR || *funcname=='\0') { - if (dest!=funcname) - strcpy(dest,funcname); - return dest; - } /* if */ - - unary=parse_funcname(funcname,&tags[0],&tags[1],opname); - tagsym[1]=find_tag_byval(tags[1]); - assert(tagsym[1]!=NULL); - if (unary) { - sprintf(dest,"operator%s(%s:)",opname,tagsym[1]->name); - } else { - tagsym[0]=find_tag_byval(tags[0]); - assert(tagsym[0]!=NULL); - /* special case: the assignment operator has the return value as the 2nd tag */ - if (opname[0]=='=' && opname[1]=='\0') - sprintf(dest,"%s:operator%s(%s:)",tagsym[0]->name,opname,tagsym[1]->name); - else - sprintf(dest,"operator%s(%s:,%s:)",opname,tagsym[0]->name,tagsym[1]->name); - } /* if */ - return dest; -} - -static void funcstub(int native) -{ - int tok,tag; - char *str; - cell val,size; - char symbolname[sNAMEMAX+1]; - int idxtag[sDIMEN_MAX]; - int dim[sDIMEN_MAX]; - int numdim; - symbol *sym,*sub; - int opertok; - - opertok=0; - lastst=0; - litidx=0; /* clear the literal pool */ - assert(loctab.next==NULL); /* local symbol table should be empty */ - - tag=pc_addtag(NULL); /* get the tag of the return value */ - numdim=0; - while (matchtoken('[')) { - /* the function returns an array, get this tag for the index and the array - * dimensions - */ - if (numdim == sDIMEN_MAX) { - error(53); /* exceeding maximum number of dimensions */ - return; - } /* if */ - size=needsub(&idxtag[numdim],NULL); /* get size; size==0 for "var[]" */ - if (size==0) - error(9); /* invalid array size */ - #if INT_MAX < LONG_MAX - if (size > INT_MAX) - error(105); /* overflow, exceeding capacity */ - #endif - dim[numdim++]=(int)size; - } /* while */ - - tok=lex(&val,&str); - if (native) { - if (tok==tPUBLIC || tok==tSTOCK || tok==tSTATIC || (tok==tSYMBOL && *str==PUBLIC_CHAR)) - error(42); /* invalid combination of class specifiers */ - } else { - if (tok==tPUBLIC || tok==tSTOCK || tok==tSTATIC) - tok=lex(&val,&str); - } /* if */ - - if (tok==tOPERATOR) { - opertok=operatorname(symbolname); - if (opertok==0) - return; /* error message already given */ - check_operatortag(opertok,tag,symbolname); - } else { - if (tok!=tSYMBOL && freading) { - error(10); /* illegal function or declaration */ - return; - } /* if */ - strcpy(symbolname,str); - } /* if */ - needtoken('('); /* only functions may be native/forward */ - - sym=fetchfunc(symbolname,tag);/* get a pointer to the function entry */ - if (sym==NULL) - return; - if (native) { - sym->usage=(char)(uNATIVE | uRETVALUE | uDEFINE | (sym->usage & uPROTOTYPED)); - sym->x.lib=curlibrary; - } /* if */ - - declargs(sym); - /* "declargs()" found the ")" */ - sc_attachdocumentation(sym); /* attach any documenation to the function */ - if (!operatoradjust(opertok,sym,symbolname,tag)) - sym->usage &= ~uDEFINE; - - if (getstates(symbolname)!=0) { - if (native || opertok!=0) - error(82); /* native functions and operators may not have states */ - else - error(231); /* ignoring state specifications on forward declarations */ - } /* if */ - - /* for a native operator, also need to specify an "exported" function name; - * for a native function, this is optional - */ - if (native) { - if (opertok!=0) { - needtoken('='); - lexpush(); /* push back, for matchtoken() to retrieve again */ - } /* if */ - if (matchtoken('=')) { - /* allow number or symbol */ - if (matchtoken(tSYMBOL)) { - tokeninfo(&val,&str); - insert_alias(sym->name,str); - } else { - constexpr(&val,NULL,NULL); - sym->addr=val; - /* At the moment, I have assumed that this syntax is only valid if - * val < 0. To properly mix "normal" native functions and indexed - * native functions, one should use negative indices anyway. - * Special code for a negative index in sym->addr exists in SC4.C - * (ffcall()) and in SC6.C (the loops for counting the number of native - * variables and for writing them). - */ - } /* if */ - } /* if */ - } /* if */ - needtoken(tTERM); - - /* attach the array to the function symbol */ - if (numdim>0) { - assert(sym!=NULL); - sub=addvariable(symbolname,0,iARRAY,sGLOBAL,tag,dim,numdim,idxtag); - sub->parent=sym; - } /* if */ - - litidx=0; /* clear the literal pool */ - delete_symbols(&loctab,0,TRUE,TRUE);/* clear local variables queue */ -} - -/* newfunc - begin a function - * - * This routine is called from "parse" and tries to make a function - * out of the following text - * - * Global references: funcstatus,lastst,litidx - * rettype (altered) - * curfunc (altered) - * declared (altered) - * glb_declared (altered) - * sc_alignnext (altered) - */ -static int newfunc(char *firstname,int firsttag,int fpublic,int fstatic,int stock) -{ - symbol *sym; - int argcnt,tok,tag,funcline; - int opertok,opererror; - char symbolname[sNAMEMAX+1]; - char *str; - cell val,cidx,glbdecl; - short filenum; - int state_id; - - assert(litidx==0); /* literal queue should be empty */ - litidx=0; /* clear the literal pool (should already be empty) */ - opertok=0; - lastst=0; /* no statement yet */ - cidx=0; /* just to avoid compiler warnings */ - glbdecl=0; - assert(loctab.next==NULL); /* local symbol table should be empty */ - filenum=fcurrent; /* save file number at the start of the declaration */ - - if (firstname!=NULL) { - assert(strlen(firstname)<=sNAMEMAX); - strcpy(symbolname,firstname); /* save symbol name */ - tag=firsttag; - } else { - tag= (firsttag>=0) ? firsttag : pc_addtag(NULL); - tok=lex(&val,&str); - assert(!fpublic); - if (tok==tNATIVE || (tok==tPUBLIC && stock)) - error(42); /* invalid combination of class specifiers */ - if (tok==tOPERATOR) { - opertok=operatorname(symbolname); - if (opertok==0) - return TRUE; /* error message already given */ - check_operatortag(opertok,tag,symbolname); - } else { - if (tok!=tSYMBOL && freading) { - error(20,str); /* invalid symbol name */ - return FALSE; - } /* if */ - assert(strlen(str)<=sNAMEMAX); - strcpy(symbolname,str); - } /* if */ - } /* if */ - /* check whether this is a function or a variable declaration */ - if (!matchtoken('(')) - return FALSE; - /* so it is a function, proceed */ - funcline=fline; /* save line at which the function is defined */ - if (symbolname[0]==PUBLIC_CHAR) { - fpublic=TRUE; /* implicitly public function */ - if (stock) - error(42); /* invalid combination of class specifiers */ - } /* if */ - sym=fetchfunc(symbolname,tag);/* get a pointer to the function entry */ - if (sym==NULL || (sym->usage & uNATIVE)!=0) - return TRUE; /* it was recognized as a function declaration, but not as a valid one */ - if (fpublic) - sym->usage|=uPUBLIC; - if (fstatic) - sym->fnumber=filenum; - /* if the function was used before being declared, and it has a tag for the - * result, add a third pass (as second "skimming" parse) because the function - * result may have been used with user-defined operators, which have now - * been incorrectly flagged (as the return tag was unknown at the time of - * the call) - */ - if ((sym->usage & (uPROTOTYPED | uREAD))==uREAD && sym->tag!=0) { - int curstatus=sc_status; - sc_status=statWRITE; /* temporarily set status to WRITE, so the warning isn't blocked */ - //error(208); //this is silly, it should be caught the first pass - sc_status=curstatus; - sc_reparse=TRUE; /* must add another pass to "initial scan" phase */ - } /* if */ - /* declare all arguments */ - argcnt=declargs(sym); - opererror=!operatoradjust(opertok,sym,symbolname,tag); - if (strcmp(symbolname,uMAINFUNC)==0 || strcmp(symbolname,uENTRYFUNC)==0) { - if (argcnt>0) - error(5); /* "main()" and "entry()" functions may not have any arguments */ - sym->usage|=uREAD; /* "main()" is the program's entry point: always used */ - } /* if */ - state_id=getstates(symbolname); - if (opertok!=0 && state_id>0) - error(82); /* operators may not have states */ - attachstatelist(sym,state_id); - /* "declargs()" found the ")"; if a ";" appears after this, it was a - * prototype */ - if (matchtoken(';')) { - if (!sc_needsemicolon) - error(218); /* old style prototypes used with optional semicolumns */ - delete_symbols(&loctab,0,TRUE,TRUE); /* prototype is done; forget everything */ - return TRUE; - } /* if */ - /* so it is not a prototype, proceed */ - /* if this is a function that is not referred to (this can only be detected - * in the second stage), shut code generation off */ - if (sc_status==statWRITE && (sym->usage & uREAD)==0) { - sc_status=statSKIP; - cidx=code_idx; - glbdecl=glb_declared; - } /* if */ - begcseg(); - sym->usage|=uDEFINE; /* set the definition flag */ - if (fpublic) - sym->usage|=uREAD; /* public functions are always "used" */ - if (stock) - sym->usage|=uSTOCK; - if (opertok!=0 && opererror) - sym->usage &= ~uDEFINE; - /* if the function has states, dump the label to the start of the function */ - if (state_id!=0) { - constvalue *ptr=sym->states->next; - while (ptr!=NULL) { - assert(sc_status!=statWRITE || strlen(ptr->name)>0); - if (ptr->index==state_id) { - setlabel((int)strtol(ptr->name,NULL,16)); - break; - } /* if */ - ptr=ptr->next; - } /* while */ - } /* if */ - startfunc(sym->name); /* creates stack frame */ - insert_dbgline(funcline); - setline(FALSE); - if (sc_alignnext) { - alignframe(sc_dataalign); - sc_alignnext=FALSE; - } /* if */ - declared=0; /* number of local cells */ - rettype=(sym->usage & uRETVALUE); /* set "return type" variable */ - curfunc=sym; - define_args(); /* add the symbolic info for the function arguments */ - #if !defined SC_LIGHT - if (matchtoken('{')) { - lexpush(); - } else { - /* Insert a separator so that comments following the statement will not - * be attached to this function; they should be attached to the next - * function. This is not a problem for functions having a compound block, - * because the closing brace is an explicit "end token" for the function. - * With single statement functions, the preprocessor may overread the - * source code before the parser determines an "end of statement". - */ - insert_docstring_separator(); - } /* if */ - #endif - statement(NULL,FALSE); - if ((rettype & uRETVALUE)!=0) - sym->usage|=uRETVALUE; - if (declared!=0) { - /* This happens only in a very special (and useless) case, where a function - * has only a single statement in its body (no compound block) and that - * statement declares a new variable - */ - modstk((int)declared*sizeof(cell)); /* remove all local variables */ - declared=0; - } /* if */ - if ((lastst!=tRETURN) && (lastst!=tGOTO)){ - ldconst(0,sPRI); - ffret(); - if ((sym->usage & uRETVALUE)!=0) { - char symname[2*sNAMEMAX+16]; /* allow space for user defined operators */ - funcdisplayname(symname,sym->name); - error(209,symname); /* function should return a value */ - } /* if */ - } /* if */ - endfunc(); - sym->codeaddr=code_idx; - sc_attachdocumentation(sym); /* attach collected documenation to the function */ - if (litidx) { /* if there are literals defined */ - glb_declared+=litidx; - begdseg(); /* flip to DATA segment */ - dumplits(); /* dump literal strings */ - litidx=0; - } /* if */ - testsymbols(&loctab,0,TRUE,TRUE); /* test for unused arguments and labels */ - delete_symbols(&loctab,0,TRUE,TRUE); /* clear local variables queue */ - assert(loctab.next==NULL); - curfunc=NULL; - if (sc_status==statSKIP) { - sc_status=statWRITE; - code_idx=cidx; - glb_declared=glbdecl; - } /* if */ - return TRUE; -} - -static int argcompare(arginfo *a1,arginfo *a2) -{ - int result=1,level,i; - - if (result) - result= a1->ident==a2->ident; /* type/class */ - if (result) - result= a1->usage==a2->usage; /* "const" flag */ - if (result) - result= a1->numtags==a2->numtags; /* tags (number and names) */ - for (i=0; result && inumtags; i++) - result= a1->tags[i]==a2->tags[i]; - if (result) - result= a1->numdim==a2->numdim; /* array dimensions & index tags */ - for (level=0; result && levelnumdim; level++) - result= a1->dim[level]==a2->dim[level]; - for (level=0; result && levelnumdim; level++) - result= a1->idxtag[level]==a2->idxtag[level]; - if (result) - result= a1->hasdefault==a2->hasdefault; /* availability of default value */ - if (a1->hasdefault) { - if (a1->ident==iREFARRAY) { - if (result) - result= a1->defvalue.array.size==a2->defvalue.array.size; - if (result) - result= a1->defvalue.array.arraysize==a2->defvalue.array.arraysize; - /* ??? should also check contents of the default array (these troubles - * go away in a 2-pass compiler that forbids double declarations, but - * Pawn currently does not forbid them) */ - } else { - if (result) { - if ((a1->hasdefault & uSIZEOF)!=0 || (a1->hasdefault & uTAGOF)!=0) - result= a1->hasdefault==a2->hasdefault - && strcmp(a1->defvalue.size.symname,a2->defvalue.size.symname)==0 - && a1->defvalue.size.level==a2->defvalue.size.level; - else - result= a1->defvalue.val==a2->defvalue.val; - } /* if */ - } /* if */ - if (result) - result= a1->defvalue_tag==a2->defvalue_tag; - } /* if */ - return result; -} - -/* declargs() - * - * This routine adds an entry in the local symbol table for each argument - * found in the argument list. It returns the number of arguments. - */ -static int declargs(symbol *sym) -{ - #define MAXTAGS 16 - char *ptr; - int argcnt,oldargcnt,tok,tags[MAXTAGS],numtags; - cell val; - arginfo arg, *arglist; - char name[sNAMEMAX+1]; - int ident,fpublic,fconst; - int idx; - - /* if the function is already defined earlier, get the number of arguments - * of the existing definition - */ - oldargcnt=0; - if ((sym->usage & uPROTOTYPED)!=0) - while (sym->dim.arglist[oldargcnt].ident!=0) - oldargcnt++; - argcnt=0; /* zero aruments up to now */ - ident=iVARIABLE; - numtags=0; - fconst=FALSE; - fpublic= (sym->usage & uPUBLIC)!=0; - /* the '(' parantheses has already been parsed */ - if (!matchtoken(')')){ - do { /* there are arguments; process them */ - /* any legal name increases argument count (and stack offset) */ - tok=lex(&val,&ptr); - switch (tok) { - case 0: - /* nothing */ - break; - case '&': - if (ident!=iVARIABLE || numtags>0) - error(1,"-identifier-","&"); - ident=iREFERENCE; - break; - case tCONST: - if (ident!=iVARIABLE || numtags>0) - error(1,"-identifier-","const"); - fconst=TRUE; - break; - case tLABEL: - if (numtags>0) - error(1,"-identifier-","-tagname-"); - tags[0]=pc_addtag(ptr); - numtags=1; - break; - case '{': - if (numtags>0) - error(1,"-identifier-","-tagname-"); - numtags=0; - while (numtags=sMAXARGS) - error(45); /* too many function arguments */ - strcpy(name,ptr); /* save symbol name */ - if (name[0]==PUBLIC_CHAR) - error(56,name); /* function arguments cannot be public */ - if (numtags==0) - tags[numtags++]=0; /* default tag */ - /* Stack layout: - * base + 0*sizeof(cell) == previous "base" - * base + 1*sizeof(cell) == function return address - * base + 2*sizeof(cell) == number of arguments - * base + 3*sizeof(cell) == first argument of the function - * So the offset of each argument is "(argcnt+3) * sizeof(cell)". - */ - doarg(name,ident,(argcnt+3)*sizeof(cell),tags,numtags,fpublic,fconst,&arg); - if (fpublic && arg.hasdefault) - error(59,name); /* arguments of a public function may not have a default value */ - if ((sym->usage & uPROTOTYPED)==0) { - /* redimension the argument list, add the entry */ - sym->dim.arglist=(arginfo*)realloc(sym->dim.arglist,(argcnt+2)*sizeof(arginfo)); - if (sym->dim.arglist==0) - error(103); /* insufficient memory */ - memset(&sym->dim.arglist[argcnt+1],0,sizeof(arginfo)); /* keep the list terminated */ - sym->dim.arglist[argcnt]=arg; - } else { - /* check the argument with the earlier definition */ - if (argcnt>oldargcnt || !argcompare(&sym->dim.arglist[argcnt],&arg)) - error(25); /* function definition does not match prototype */ - /* may need to free default array argument and the tag list */ - if (arg.ident==iREFARRAY && arg.hasdefault) - free(arg.defvalue.array.data); - else if (arg.ident==iVARIABLE - && ((arg.hasdefault & uSIZEOF)!=0 || (arg.hasdefault & uTAGOF)!=0)) - free(arg.defvalue.size.symname); - free(arg.tags); - } /* if */ - argcnt++; - ident=iVARIABLE; - numtags=0; - fconst=FALSE; - break; - case tELLIPS: - if (ident!=iVARIABLE) - error(10); /* illegal function or declaration */ - if (numtags==0) - tags[numtags++]=0; /* default tag */ - if ((sym->usage & uPROTOTYPED)==0) { - /* redimension the argument list, add the entry iVARARGS */ - sym->dim.arglist=(arginfo*)realloc(sym->dim.arglist,(argcnt+2)*sizeof(arginfo)); - if (sym->dim.arglist==0) - error(103); /* insufficient memory */ - memset(&sym->dim.arglist[argcnt+1],0,sizeof(arginfo)); /* keep the list terminated */ - sym->dim.arglist[argcnt].ident=iVARARGS; - sym->dim.arglist[argcnt].hasdefault=FALSE; - sym->dim.arglist[argcnt].defvalue.val=0; - sym->dim.arglist[argcnt].defvalue_tag=0; - sym->dim.arglist[argcnt].numtags=numtags; - sym->dim.arglist[argcnt].tags=(int*)malloc(numtags*sizeof tags[0]); - if (sym->dim.arglist[argcnt].tags==NULL) - error(103); /* insufficient memory */ - memcpy(sym->dim.arglist[argcnt].tags,tags,numtags*sizeof tags[0]); - } else { - if (argcnt>oldargcnt || sym->dim.arglist[argcnt].ident!=iVARARGS) - error(25); /* function definition does not match prototype */ - } /* if */ - argcnt++; - break; - default: - error(10); /* illegal function or declaration */ - } /* switch */ - } while (tok=='&' || tok==tLABEL || tok==tCONST - || (tok!=tELLIPS && matchtoken(','))); /* more? */ - /* if the next token is not ",", it should be ")" */ - needtoken(')'); - } /* if */ - /* resolve any "sizeof" arguments (now that all arguments are known) */ - assert(sym->dim.arglist!=NULL); - arglist=sym->dim.arglist; - for (idx=0; idx=argcnt) { - error(17,ptr); /* undefined symbol */ - } else { - assert(arglist[idx].defvalue.size.symname!=NULL); - /* check the level against the number of dimensions */ - if (arglist[idx].defvalue.size.level>0 - && arglist[idx].defvalue.size.level>=arglist[altidx].numdim) - error(28,arglist[idx].name); /* invalid subscript */ - /* check the type of the argument whose size to take; for a iVARIABLE - * or a iREFERENCE, this is always 1 (so the code is redundant) - */ - assert(arglist[altidx].ident!=iVARARGS); - if (arglist[altidx].ident!=iREFARRAY && (arglist[idx].hasdefault & uSIZEOF)!=0) { - if ((arglist[idx].hasdefault & uTAGOF)!=0) { - error(81,arglist[idx].name); /* cannot take "tagof" an indexed array */ - } else { - assert(arglist[altidx].ident==iVARIABLE || arglist[altidx].ident==iREFERENCE); - error(223,ptr); /* redundant sizeof */ - } /* if */ - } /* if */ - } /* if */ - } /* if */ - } /* for */ - - sym->usage|=uPROTOTYPED; - errorset(sRESET); /* reset error flag (clear the "panic mode")*/ - return argcnt; -} - -/* doarg - declare one argument type - * - * this routine is called from "declargs()" and adds an entry in the local - * symbol table for one argument. - * - * "fpublic" indicates whether the function for this argument list is public. - * The arguments themselves are never public. - */ -static void doarg(char *name,int ident,int offset,int tags[],int numtags, - int fpublic,int fconst,arginfo *arg) -{ - symbol *argsym; - constvalue *enumroot; - cell size; - - strcpy(arg->name,name); - arg->hasdefault=FALSE; /* preset (most common case) */ - arg->defvalue.val=0; /* clear */ - arg->defvalue_tag=0; - arg->numdim=0; - if (matchtoken('[')) { - if (ident==iREFERENCE) - error(67,name); /* illegal declaration ("&name[]" is unsupported) */ - do { - if (arg->numdim == sDIMEN_MAX) { - error(53); /* exceeding maximum number of dimensions */ - return; - } /* if */ - size=needsub(&arg->idxtag[arg->numdim],&enumroot);/* may be zero here, it is a pointer anyway */ - #if INT_MAX < LONG_MAX - if (size > INT_MAX) - error(105); /* overflow, exceeding capacity */ - #endif - arg->dim[arg->numdim]=(int)size; - arg->numdim+=1; - } while (matchtoken('[')); - ident=iREFARRAY; /* "reference to array" (is a pointer) */ - if (matchtoken('=')) { - lexpush(); /* initials() needs the "=" token again */ - assert(litidx==0); /* at the start of a function, this is reset */ - assert(numtags>0); - initials(ident,tags[0],&size,arg->dim,arg->numdim,enumroot); - assert(size>=litidx); - /* allocate memory to hold the initial values */ - arg->defvalue.array.data=(cell *)malloc(litidx*sizeof(cell)); - if (arg->defvalue.array.data!=NULL) { - int i; - memcpy(arg->defvalue.array.data,litq,litidx*sizeof(cell)); - arg->hasdefault=TRUE; /* argument has default value */ - arg->defvalue.array.size=litidx; - arg->defvalue.array.addr=-1; - /* calulate size to reserve on the heap */ - arg->defvalue.array.arraysize=1; - for (i=0; inumdim; i++) - arg->defvalue.array.arraysize*=arg->dim[i]; - if (arg->defvalue.array.arraysize < arg->defvalue.array.size) - arg->defvalue.array.arraysize = arg->defvalue.array.size; - } /* if */ - litidx=0; /* reset */ - } /* if */ - } else { - if (matchtoken('=')) { - unsigned char size_tag_token; - assert(ident==iVARIABLE || ident==iREFERENCE); - arg->hasdefault=TRUE; /* argument has a default value */ - size_tag_token=(unsigned char)(matchtoken(tSIZEOF) ? uSIZEOF : 0); - if (size_tag_token==0) - size_tag_token=(unsigned char)(matchtoken(tTAGOF) ? uTAGOF : 0); - if (size_tag_token!=0) { - int paranthese; - if (ident==iREFERENCE) - error(66,name); /* argument may not be a reference */ - paranthese=0; - while (matchtoken('(')) - paranthese++; - if (needtoken(tSYMBOL)) { - /* save the name of the argument whose size id to take */ - char *name; - cell val; - tokeninfo(&val,&name); - if ((arg->defvalue.size.symname=duplicatestring(name)) == NULL) - error(103); /* insufficient memory */ - arg->defvalue.size.level=0; - if (size_tag_token==uSIZEOF) { - while (matchtoken('[')) { - arg->defvalue.size.level+=(short)1; - needtoken(']'); - } /* while */ - } /* if */ - if (ident==iVARIABLE) /* make sure we set this only if not a reference */ - arg->hasdefault |= size_tag_token; /* uSIZEOF or uTAGOF */ - } /* if */ - while (paranthese--) - needtoken(')'); - } else { - constexpr(&arg->defvalue.val,&arg->defvalue_tag,NULL); - assert(numtags>0); - if (!matchtag(tags[0],arg->defvalue_tag,TRUE)) - error(213); /* tagname mismatch */ - } /* if */ - } /* if */ - } /* if */ - arg->ident=(char)ident; - arg->usage=(char)(fconst ? uCONST : 0); - arg->numtags=numtags; - arg->tags=(int*)malloc(numtags*sizeof tags[0]); - if (arg->tags==NULL) - error(103); /* insufficient memory */ - memcpy(arg->tags,tags,numtags*sizeof tags[0]); - argsym=findloc(name); - if (argsym!=NULL) { - error(21,name); /* symbol already defined */ - } else { - if ((argsym=findglb(name))!=NULL && argsym->ident!=iFUNCTN && curfunc!=NULL) - error(219,name); /* variable shadows another symbol */ - /* add details of type and address */ - assert(numtags>0); - argsym=addvariable(name,offset,ident,sLOCAL,tags[0], - arg->dim,arg->numdim,arg->idxtag); - argsym->compound=0; - if (ident==iREFERENCE) - argsym->usage|=uREAD; /* because references are passed back */ - if (fpublic) - argsym->usage|=uREAD; /* arguments of public functions are always "used" */ - if (fconst) - argsym->usage|=uCONST; - } /* if */ -} - -static int count_referrers(symbol *entry) -{ - int i,count; - - count=0; - for (i=0; inumrefers; i++) - if (entry->refer[i]!=NULL) - count++; - return count; -} - -#if !defined SC_LIGHT -static int find_xmltag(char *source,char *xmltag,char *xmlparam,char *xmlvalue, - char **outer_start,int *outer_length, - char **inner_start,int *inner_length) -{ - char *ptr,*inner_end; - int xmltag_len,xmlparam_len,xmlvalue_len; - int match; - - assert(source!=NULL); - assert(xmltag!=NULL); - assert(outer_start!=NULL); - assert(outer_length!=NULL); - assert(inner_start!=NULL); - assert(inner_length!=NULL); - - /* both NULL or both non-NULL */ - assert(xmlvalue!=NULL && xmlparam!=NULL || xmlvalue==NULL && xmlparam==NULL); - - xmltag_len=strlen(xmltag); - xmlparam_len= (xmlparam!=NULL) ? strlen(xmlparam) : 0; - xmlvalue_len= (xmlvalue!=NULL) ? strlen(xmlvalue) : 0; - ptr=source; - /* find an opening '<' */ - while ((ptr=strchr(ptr,'<'))!=NULL) { - *outer_start=ptr; /* be optimistic... */ - match=FALSE; /* ...and pessimistic at the same time */ - ptr++; /* skip '<' */ - while (*ptr!='\0' && *ptr<=' ') - ptr++; /* skip white space */ - if (strncmp(ptr,xmltag,xmltag_len)==0 && (*(ptr+xmltag_len)<=' ' || *(ptr+xmltag_len)=='>')) { - /* xml tag found, optionally check the parameter */ - ptr+=xmltag_len; - while (*ptr!='\0' && *ptr<=' ') - ptr++; /* skip white space */ - if (xmlparam!=NULL) { - if (strncmp(ptr,xmlparam,xmlparam_len)==0 && (*(ptr+xmlparam_len)<=' ' || *(ptr+xmlparam_len)=='=')) { - ptr+=xmlparam_len; - while (*ptr!='\0' && *ptr<=' ') - ptr++; /* skip white space */ - if (*ptr=='=') { - ptr++; /* skip '=' */ - while (*ptr!='\0' && *ptr<=' ') - ptr++; /* skip white space */ - if (*ptr=='"' || *ptr=='\'') - ptr++; /* skip " or ' */ - assert(xmlvalue!=NULL); - if (strncmp(ptr,xmlvalue,xmlvalue_len)==0 - && (*(ptr+xmlvalue_len)<=' ' - || *(ptr+xmlvalue_len)=='>' - || *(ptr+xmlvalue_len)=='"' - || *(ptr+xmlvalue_len)=='\'')) - match=TRUE; /* found it */ - } /* if */ - } /* if */ - } else { - match=TRUE; /* don't check the parameter */ - } /* if */ - } /* if */ - if (match) { - /* now find the end of the opening tag */ - while (*ptr!='\0' && *ptr!='>') - ptr++; - if (*ptr=='>') - ptr++; - while (*ptr!='\0' && *ptr<=' ') - ptr++; /* skip white space */ - *inner_start=ptr; - /* find the start of the closing tag (assume no nesting) */ - while ((ptr=strchr(ptr,'<'))!=NULL) { - inner_end=ptr; - ptr++; /* skip '<' */ - while (*ptr!='\0' && *ptr<=' ') - ptr++; /* skip white space */ - if (*ptr=='/') { - ptr++; /* skip / */ - while (*ptr!='\0' && *ptr<=' ') - ptr++; /* skip white space */ - if (strncmp(ptr,xmltag,xmltag_len)==0 && (*(ptr+xmltag_len)<=' ' || *(ptr+xmltag_len)=='>')) { - /* find the end of the closing tag */ - while (*ptr!='\0' && *ptr!='>') - ptr++; - if (*ptr=='>') - ptr++; - /* set the lengths of the inner and outer segment */ - assert(*inner_start!=NULL); - *inner_length=(int)(inner_end-*inner_start); - assert(*outer_start!=NULL); - *outer_length=(int)(ptr-*outer_start); - break; /* break out of the loop */ - } /* if */ - } /* if */ - } /* while */ - return TRUE; - } /* if */ - } /* while */ - return FALSE; /* not found */ -} - -static char *xmlencode(char *dest,char *source) -{ - char temp[2*sNAMEMAX+20],*ptr; - - /* replace < by < and such; normally, such a symbol occurs at most once in - * a symbol name (e.g. "operator<") - */ - ptr=temp; - while (*source!='\0') { - switch (*source) { - case '<': - strcpy(ptr,"<"); - ptr+=4; - break; - case '>': - strcpy(ptr,">"); - ptr+=4; - break; - case '&': - strcpy(ptr,"&"); - ptr+=5; - break; - default: - *ptr++=*source; - } /* switch */ - source++; - } /* while */ - *ptr='\0'; - strcpy(dest,temp); - return dest; -} - -static void make_report(symbol *root,FILE *log,char *sourcefile) -{ - char symname[2*sNAMEMAX+20]; - int i,arg; - symbol *sym,*ref; - constvalue *tagsym; - constvalue *enumroot; - char *ptr; - - /* the XML header */ - fprintf(log,"\n"); - fprintf(log,"\n"); - fprintf(log,"\n",sourcefile); - ptr=strrchr(sourcefile,DIRSEP_CHAR); - if (ptr!=NULL) - ptr++; - else - ptr=sourcefile; - fprintf(log,"\t\n\t\t%s\n\t\n",ptr); - - /* attach the global documentation, if any */ - if (sc_documentation!=NULL) { - fprintf(log,"\n\t\n"); - fprintf(log,"\t\n\t\t"); - fputs(sc_documentation,log); - fprintf(log,"\n\t\n\n"); - } /* if */ - - /* use multiple passes to print constants variables and functions in - * separate sections - */ - fprintf(log,"\t\n"); - - fprintf(log,"\n\t\t\n"); - for (sym=root->next; sym!=NULL; sym=sym->next) { - if (sym->parent!=NULL) - continue; /* hierarchical data type */ - assert(sym->ident==iCONSTEXPR || sym->ident==iVARIABLE - || sym->ident==iARRAY || sym->ident==iFUNCTN); - if (sym->ident!=iCONSTEXPR || (sym->usage & uENUMROOT)==0) - continue; - if ((sym->usage & uREAD)==0) - continue; - fprintf(log,"\t\t\n",funcdisplayname(symname,sym->name),(long)sym->addr); - if (sym->tag!=0) { - tagsym=find_tag_byval(sym->tag); - assert(tagsym!=NULL); - fprintf(log,"\t\t\t\n",tagsym->name); - } /* if */ - /* browse through all fields */ - if ((enumroot=sym->dim.enumlist)!=NULL) { - enumroot=enumroot->next; /* skip root */ - while (enumroot!=NULL) { - fprintf(log,"\t\t\t\n",funcdisplayname(symname,enumroot->name),(long)enumroot->value); - /* find the constant with this name and get the tag */ - ref=findglb(enumroot->name); - if (ref!=NULL) { - if (ref->x.idxtag!=0) { - tagsym=find_tag_byval(ref->x.idxtag); - assert(tagsym!=NULL); - fprintf(log,"\t\t\t\t\n",tagsym->name); - } /* if */ - if (ref->dim.array.length!=1) - fprintf(log,"\t\t\t\t\n",(long)ref->dim.array.length); - } /* if */ - fprintf(log,"\t\t\t\n"); - enumroot=enumroot->next; - } /* while */ - } /* if */ - assert(sym->refer!=NULL); - for (i=0; inumrefers; i++) { - if ((ref=sym->refer[i])!=NULL) - fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); - } /* for */ - if (sym->documentation!=NULL) - fprintf(log,"\t\t\t%s\n",sym->documentation); - fprintf(log,"\t\t\n"); - } /* for */ - - fprintf(log,"\n\t\t\n"); - for (sym=root->next; sym!=NULL; sym=sym->next) { - if (sym->parent!=NULL) - continue; /* hierarchical data type */ - assert(sym->ident==iCONSTEXPR || sym->ident==iVARIABLE - || sym->ident==iARRAY || sym->ident==iFUNCTN); - if (sym->ident!=iCONSTEXPR) - continue; - if ((sym->usage & uREAD)==0 || (sym->usage & (uENUMFIELD | uENUMROOT))!=0) - continue; - fprintf(log,"\t\t\n",funcdisplayname(symname,sym->name),(long)sym->addr); - if (sym->tag!=0) { - tagsym=find_tag_byval(sym->tag); - assert(tagsym!=NULL); - fprintf(log,"\t\t\t\n",tagsym->name); - } /* if */ - assert(sym->refer!=NULL); - for (i=0; inumrefers; i++) { - if ((ref=sym->refer[i])!=NULL) - fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); - } /* for */ - if (sym->documentation!=NULL) - fprintf(log,"\t\t\t%s\n",sym->documentation); - fprintf(log,"\t\t\n"); - } /* for */ - - fprintf(log,"\n\t\t\n"); - for (sym=root->next; sym!=NULL; sym=sym->next) { - if (sym->parent!=NULL) - continue; /* hierarchical data type */ - if (sym->ident!=iVARIABLE && sym->ident!=iARRAY) - continue; - fprintf(log,"\t\t\n",funcdisplayname(symname,sym->name)); - if (sym->tag!=0) { - tagsym=find_tag_byval(sym->tag); - assert(tagsym!=NULL); - fprintf(log,"\t\t\t\n",tagsym->name); - } /* if */ - assert(sym->refer!=NULL); - if ((sym->usage & uPUBLIC)!=0) - fprintf(log,"\t\t\t\n"); - for (i=0; inumrefers; i++) { - if ((ref=sym->refer[i])!=NULL) - fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); - } /* for */ - if (sym->documentation!=NULL) - fprintf(log,"\t\t\t%s\n",sym->documentation); - fprintf(log,"\t\t\n"); - } /* for */ - - fprintf(log,"\n\t\t\n"); - for (sym=root->next; sym!=NULL; sym=sym->next) { - if (sym->parent!=NULL) - continue; /* hierarchical data type */ - if (sym->ident!=iFUNCTN) - continue; - if ((sym->usage & (uREAD | uNATIVE))==uNATIVE) - continue; /* unused native function */ - funcdisplayname(symname,sym->name); - xmlencode(symname,symname); - fprintf(log,"\t\tdim.arglist!=NULL); - for (arg=0; sym->dim.arglist[arg].ident!=0; arg++) { - int dim; - if (arg>0) - fprintf(log,", "); - switch (sym->dim.arglist[arg].ident) { - case iVARIABLE: - fprintf(log,"%s",sym->dim.arglist[arg].name); - break; - case iREFERENCE: - fprintf(log,"&%s",sym->dim.arglist[arg].name); - break; - case iREFARRAY: - fprintf(log,"%s",sym->dim.arglist[arg].name); - for (dim=0; dimdim.arglist[arg].numdim;dim++) - fprintf(log,"[]"); - break; - case iVARARGS: - fprintf(log,"..."); - break; - } /* switch */ - } /* for */ - /* ??? should also print an "array return" size */ - fprintf(log,")\">\n"); - if (sym->tag!=0) { - tagsym=find_tag_byval(sym->tag); - assert(tagsym!=NULL); - fprintf(log,"\t\t\t\n",tagsym->name); - } /* if */ - /* check whether this function is called from the outside */ - if ((sym->usage & uNATIVE)!=0) - fprintf(log,"\t\t\t\n"); - if ((sym->usage & uPUBLIC)!=0) - fprintf(log,"\t\t\t\n"); - if (strcmp(sym->name,uMAINFUNC)==0 || strcmp(sym->name,uENTRYFUNC)==0) - fprintf(log,"\t\t\t\n"); - if ((sym->usage & uNATIVE)==0) - fprintf(log,"\t\t\t\n",(long)sym->x.stacksize); - if (sym->states!=NULL) { - constvalue *stlist=sym->states->next; - assert(stlist!=NULL); /* there should be at least one state item */ - while (stlist!=NULL && stlist->index==-1) - stlist=stlist->next; - assert(stlist!=NULL); /* state id should be found */ - i=state_getfsa(stlist->index); - assert(i>=0); /* automaton 0 exists */ - stlist=automaton_findid(i); - assert(stlist!=NULL); /* automaton should be found */ - fprintf(log,"\t\t\t\n", strlen(stlist->name)>0 ? stlist->name : "(anonymous)"); - //??? dump state decision table - } /* if */ - assert(sym->refer!=NULL); - for (i=0; inumrefers; i++) - if ((ref=sym->refer[i])!=NULL) - fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); - /* print all symbols that are required for this function to compile */ - for (ref=root->next; ref!=NULL; ref=ref->next) { - if (ref==sym) - continue; - for (i=0; inumrefers; i++) - if (ref->refer[i]==sym) - fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); - } /* for */ - /* print parameter list, with tag & const information, plus descriptions */ - assert(sym->dim.arglist!=NULL); - for (arg=0; sym->dim.arglist[arg].ident!=0; arg++) { - int dim,paraminfo; - char *outer_start,*inner_start; - int outer_length=0,inner_length=0; - if (sym->dim.arglist[arg].ident==iVARARGS) - fprintf(log,"\t\t\t\n"); - else - fprintf(log,"\t\t\t\n",sym->dim.arglist[arg].name); - /* print the tag name(s) for each parameter */ - assert(sym->dim.arglist[arg].numtags>0); - assert(sym->dim.arglist[arg].tags!=NULL); - paraminfo=(sym->dim.arglist[arg].numtags>1 || sym->dim.arglist[arg].tags[0]!=0) - || sym->dim.arglist[arg].ident==iREFERENCE - || sym->dim.arglist[arg].ident==iREFARRAY; - if (paraminfo) - fprintf(log,"\t\t\t\t"); - if (sym->dim.arglist[arg].numtags>1 || sym->dim.arglist[arg].tags[0]!=0) { - assert(paraminfo); - if (sym->dim.arglist[arg].numtags>1) - fprintf(log," {"); - for (i=0; idim.arglist[arg].numtags; i++) { - if (i>0) - fprintf(log,","); - tagsym=find_tag_byval(sym->dim.arglist[arg].tags[i]); - assert(tagsym!=NULL); - fprintf(log,"%s",tagsym->name); - } /* for */ - if (sym->dim.arglist[arg].numtags>1) - fprintf(log,"}"); - } /* if */ - switch (sym->dim.arglist[arg].ident) { - case iREFERENCE: - fprintf(log," &"); - break; - case iREFARRAY: - fprintf(log," "); - for (dim=0; dimdim.arglist[arg].numdim; dim++) { - if (sym->dim.arglist[arg].dim[dim]==0) { - fprintf(log,"[]"); - } else { - //??? find index tag - fprintf(log,"[%d]",sym->dim.arglist[arg].dim[dim]); - } /* if */ - } /* for */ - break; - } /* switch */ - if (paraminfo) - fprintf(log," \n"); - /* print the user description of the parameter (parse through - * sym->documentation) - */ - if (sym->documentation!=NULL - && find_xmltag(sym->documentation, "param", "name", sym->dim.arglist[arg].name, - &outer_start, &outer_length, &inner_start, &inner_length)) - { - char *tail; - fprintf(log,"\t\t\t\t%.*s\n",inner_length,inner_start); - /* delete from documentation string */ - tail=outer_start+outer_length; - memmove(outer_start,tail,strlen(tail)+1); - } /* if */ - fprintf(log,"\t\t\t\n"); - } /* for */ - if (sym->documentation!=NULL) - fprintf(log,"\t\t\t%s\n",sym->documentation); - fprintf(log,"\t\t\n"); - } /* for */ - - fprintf(log,"\n\t\n"); - fprintf(log,"\n"); -} -#endif - -/* Every symbol has a referrer list, that contains the functions that use - * the symbol. Now, if function "apple" is accessed by functions "banana" and - * "citron", but neither function "banana" nor "citron" are used by anyone - * else, then, by inference, function "apple" is not used either. - */ -static void reduce_referrers(symbol *root) -{ - int i,restart; - symbol *sym,*ref; - - do { - restart=0; - for (sym=root->next; sym!=NULL; sym=sym->next) { - if (sym->parent!=NULL) - continue; /* hierarchical data type */ - if (sym->ident==iFUNCTN - && (sym->usage & uNATIVE)==0 - && (sym->usage & uPUBLIC)==0 && strcmp(sym->name,uMAINFUNC)!=0 && strcmp(sym->name,uENTRYFUNC)!=0 - && count_referrers(sym)==0) - { - sym->usage&=~(uREAD | uWRITTEN); /* erase usage bits if there is no referrer */ - /* find all symbols that are referred by this symbol */ - for (ref=root->next; ref!=NULL; ref=ref->next) { - if (ref->parent!=NULL) - continue; /* hierarchical data type */ - assert(ref->refer!=NULL); - for (i=0; inumrefers && ref->refer[i]!=sym; i++) - /* nothing */; - if (inumrefers) { - assert(ref->refer[i]==sym); - ref->refer[i]=NULL; - restart++; - } /* if */ - } /* for */ - } else if ((sym->ident==iVARIABLE || sym->ident==iARRAY) - && (sym->usage & uPUBLIC)==0 - && sym->parent==NULL - && count_referrers(sym)==0) - { - sym->usage&=~(uREAD | uWRITTEN); /* erase usage bits if there is no referrer */ - } /* if */ - } /* for */ - /* after removing a symbol, check whether more can be removed */ - } while (restart>0); -} - -#if !defined SC_LIGHT -static long max_stacksize_recurse(symbol *sym,long basesize,int *pubfuncparams) -{ - long size,maxsize; - int i; - - assert(sym!=NULL); - assert(sym->ident==iFUNCTN); - assert((sym->usage & uNATIVE)==0); - /* recursion detection */ - if (sym->compound==0) - return -1; /* this function was processed already -> recursion */ - sym->compound=0; - - maxsize=sym->x.stacksize; - for (i=0; inumrefers; i++) { - if (sym->refer[i]!=NULL) { - assert(sym->refer[i]->ident==iFUNCTN); - assert((sym->refer[i]->usage & uNATIVE)==0); /* a native function cannot refer to a user-function */ - size=max_stacksize_recurse(sym->refer[i],sym->x.stacksize,pubfuncparams); - if (size<0) - return size; /* recursion was detected, quit */ - if (maxsizeusage & uPUBLIC)!=0) { - /* Find out how many parameters a public function has, then see if this - * is bigger than some maximum - */ - arginfo *arg=sym->dim.arglist; - int count=0; - assert(arg!=0); - while (arg->ident!=0) { - count++; - arg++; - } /* while */ - assert(pubfuncparams!=0); - if (count>*pubfuncparams) - *pubfuncparams=count; - } /* if */ - - return maxsize+basesize; -} - -static long max_stacksize(symbol *root) -{ - /* Loop over all non-native functions. For each function, loop - * over all of its referrers, accumulating the stack requirements. - * Detect (indirect) recursion with a "mark-and-sweep" algorithm. - * I (mis-)use the "compound" field of the symbol structure for - * the marker, as this field is unused for functions. - * - * Note that the stack is shared with the heap. A host application - * may "eat" cells from the heap as well, through amx_Allot(). The - * stack requirements are thus only an estimate. - */ - long size,maxsize; - int maxparams; - symbol *sym; - - #if !defined NDEBUG - for (sym=root->next; sym!=NULL; sym=sym->next) - if (sym->ident==iFUNCTN) - assert(sym->compound==0); - #endif - - maxsize=0; - maxparams=0; - for (sym=root->next; sym!=NULL; sym=sym->next) { - symbol *tmpsym; - /* drop out if this is not a user-implemented function */ - if (sym->ident!=iFUNCTN || (sym->usage & uNATIVE)!=0) - continue; - /* set a "mark" on all functions */ - for (tmpsym=root->next; tmpsym!=NULL; tmpsym=tmpsym->next) - if (tmpsym->ident==iFUNCTN) - tmpsym->compound=1; - /* accumulate stack size for this symbol */ - size=max_stacksize_recurse(sym,0L,&maxparams); - if (size<0) - return size; /* recursion was detected */ - if (maxsizenext; sym!=NULL; sym=sym->next) - if (sym->ident==iFUNCTN) - sym->compound=0; - - maxsize++; /* +1 because a zero cell is always pushed on top - * of the stack to catch stack overwrites */ - return maxsize+(maxparams+1);/* +1 because # of parameters is always pushed on entry */ -} -#endif - -/* testsymbols - test for unused local or global variables - * - * "Public" functions are excluded from the check, since these - * may be exported to other object modules. - * Labels are excluded from the check if the argument 'testlabs' - * is 0. Thus, labels are not tested until the end of the function. - * Constants may also be excluded (convenient for global constants). - * - * When the nesting level drops below "level", the check stops. - * - * The function returns whether there is an "entry" point for the file. - * This flag will only be 1 when browsing the global symbol table. - */ -static int testsymbols(symbol *root,int level,int testlabs,int testconst) -{ - char symname[2*sNAMEMAX+16]; - int entry=FALSE; - - symbol *sym=root->next; - while (sym!=NULL && sym->compound>=level) { - switch (sym->ident) { - case iLABEL: - if (testlabs) { - if ((sym->usage & uDEFINE)==0) - error(19,sym->name); /* not a label: ... */ - else if ((sym->usage & uREAD)==0) - error(203,sym->name); /* symbol isn't used: ... */ - } /* if */ - break; - case iFUNCTN: - if ((sym->usage & (uDEFINE | uREAD | uNATIVE | uSTOCK))==uDEFINE) { - funcdisplayname(symname,sym->name); - if (strlen(symname)>0) - error(203,symname); /* symbol isn't used ... (and not native/stock) */ - } /* if */ - if ((sym->usage & uPUBLIC)!=0 || strcmp(sym->name,uMAINFUNC)==0) - entry=TRUE; /* there is an entry point */ - /* also mark the function to the debug information */ - if ((sym->usage & uREAD)!=0 && (sym->usage & uNATIVE)==0) - insert_dbgsymbol(sym); - break; - case iCONSTEXPR: - if (testconst && (sym->usage & uREAD)==0) - error(203,sym->name); /* symbol isn't used: ... */ - break; - default: - /* a variable */ - if (sym->parent!=NULL) - break; /* hierarchical data type */ - if ((sym->usage & (uWRITTEN | uREAD | uSTOCK))==0) - error(203,sym->name); /* symbol isn't used (and not stock) */ - else if ((sym->usage & (uREAD | uSTOCK | uPUBLIC))==0) - error(204,sym->name); /* value assigned to symbol is never used */ -#if 0 // ??? not sure whether it is a good idea to force people use "const" - else if ((sym->usage & (uWRITTEN | uPUBLIC | uCONST))==0 && sym->ident==iREFARRAY) - error(214,sym->name); /* make array argument "const" */ -#endif - /* also mark the variable (local or global) to the debug information */ - if ((sym->usage & (uWRITTEN | uREAD))!=0 && (sym->usage & uNATIVE)==0) - insert_dbgsymbol(sym); - } /* if */ - sym=sym->next; - } /* while */ - - return entry; -} - -static cell calc_array_datasize(symbol *sym, cell *offset) -{ - cell length; - - assert(sym!=NULL); - assert(sym->ident==iARRAY || sym->ident==iREFARRAY); - length=sym->dim.array.length; - if (sym->dim.array.level > 0) { - cell sublength=calc_array_datasize(finddepend(sym),offset); - if (offset!=NULL) - *offset=length*(*offset+sizeof(cell)); - if (sublength>0) - length*=length*sublength; - else - length=0; - } else { - if (offset!=NULL) - *offset=0; - } /* if */ - return length; -} - -static void destructsymbols(symbol *root,int level) -{ - cell offset=0; - int savepri=FALSE; - symbol *sym=root->next; - while (sym!=NULL && sym->compound>=level) { - if (sym->ident==iVARIABLE || sym->ident==iARRAY) { - char symbolname[16]; - symbol *opsym; - cell elements; - /* check that the '~' operator is defined for this tag */ - operator_symname(symbolname,"~",sym->tag,0,1,0); - if ((opsym=findglb(symbolname))!=NULL) { - /* save PRI, in case of a return statment */ - if (!savepri) { - pushreg(sPRI); /* right-hand operand is in PRI */ - savepri=TRUE; - } /* if */ - /* if the variable is an array, get the number of elements */ - if (sym->ident==iARRAY) { - elements=calc_array_datasize(sym,&offset); - /* "elements" can be zero when the variable is declared like - * new mytag: myvar[2][] = { {1, 2}, {3, 4} } - * one should declare all dimensions! - */ - if (elements==0) - error(46,sym->name); /* array size is unknown */ - } else { - elements=1; - offset=0; - } /* if */ - pushval(elements); - /* call the '~' operator */ - address(sym,sPRI); - addconst(offset); /* add offset to array data to the address */ - pushreg(sPRI); - pushval(2*sizeof(cell));/* 2 parameters */ - assert(opsym->ident==iFUNCTN); - ffcall(opsym,NULL,1); - if (sc_status!=statSKIP) - markusage(opsym,uREAD); /* do not mark as "used" when this call itself is skipped */ - if ((opsym->usage & uNATIVE)!=0 && opsym->x.lib!=NULL) - opsym->x.lib->value += 1; /* increment "usage count" of the library */ - } /* if */ - } /* if */ - sym=sym->next; - } /* while */ - /* restore PRI, if it was saved */ - if (savepri) - popreg(sPRI); -} - -static constvalue *insert_constval(constvalue *prev,constvalue *next,const char *name,cell val, - short index) -{ - constvalue *cur; - - if ((cur=(constvalue*)malloc(sizeof(constvalue)))==NULL) - error(103); /* insufficient memory (fatal error) */ - memset(cur,0,sizeof(constvalue)); - if (name!=NULL) { - assert(strlen(name)name,name); - } /* if */ - cur->value=val; - cur->index=index; - cur->next=next; - prev->next=cur; - return cur; -} - -SC_FUNC constvalue *append_constval(constvalue *table,const char *name,cell val,short index) -{ - constvalue *cur,*prev; - - /* find the end of the constant table */ - for (prev=table, cur=table->next; cur!=NULL; prev=cur, cur=cur->next) - /* nothing */; - return insert_constval(prev,NULL,name,val,index); -} - -SC_FUNC constvalue *find_constval(constvalue *table,char *name,short index) -{ - constvalue *ptr = table->next; - - while (ptr!=NULL) { - if (strcmp(name,ptr->name)==0 && ptr->index==index) - return ptr; - ptr=ptr->next; - } /* while */ - return NULL; -} - -static constvalue *find_constval_byval(constvalue *table,cell val) -{ - constvalue *ptr = table->next; - - while (ptr!=NULL) { - if (ptr->value==val) - return ptr; - ptr=ptr->next; - } /* while */ - return NULL; -} - -#if 0 /* never used */ -static int delete_constval(constvalue *table,char *name) -{ - constvalue *prev = table; - constvalue *cur = prev->next; - - while (cur!=NULL) { - if (strcmp(name,cur->name)==0) { - prev->next=cur->next; - free(cur); - return TRUE; - } /* if */ - prev=cur; - cur=cur->next; - } /* while */ - return FALSE; -} -#endif - -SC_FUNC void delete_consttable(constvalue *table) -{ - constvalue *cur=table->next, *next; - - while (cur!=NULL) { - next=cur->next; - free(cur); - cur=next; - } /* while */ - memset(table,0,sizeof(constvalue)); -} - -/* add_constant - * - * Adds a symbol to the #define symbol table. Returns NULL on failure. - */ -SC_FUNC symbol *add_constant(char *name,cell val,int vclass,int tag) -{ - symbol *sym; - - /* Test whether a global or local symbol with the same name exists. Since - * constants are stored in the symbols table, this also finds previously - * defind constants. */ - sym=findglb(name); - if (!sym) - sym=findloc(name); - if (sym) { - /* silently ignore redefinitions of constants with the same value */ - if (sym->ident==iCONSTEXPR) { - if (sym->addr!=val) - error(201,name); /* redefinition of constant (different value) */ - } else { - error(21,name); /* symbol already defined */ - return NULL; - } /* if */ - return sym; - } /* if */ - - /* constant doesn't exist yet, an entry must be created */ - sym=addsym(name,val,iCONSTEXPR,vclass,tag,uDEFINE); - assert(sym!=NULL); /* fatal error 103 must be given on error */ - if (sc_status == statIDLE) - sym->usage |= uPREDEF; - return sym; -} - -/* statement - The Statement Parser - * - * This routine is called whenever the parser needs to know what statement - * it encounters (i.e. whenever program syntax requires a statement). - */ -static void statement(int *lastindent,int allow_decl) -{ - int tok; - cell val; - char *st; - - if (!freading) { - error(36); /* empty statement */ - return; - } /* if */ - errorset(sRESET); - - tok=lex(&val,&st); - if (tok!='{') { - insert_dbgline(fline); - setline(TRUE); - } /* if */ - /* lex() has set stmtindent */ - if (lastindent!=NULL && tok!=tLABEL) { - if (*lastindent>=0 && *lastindent!=stmtindent && !indent_nowarn && sc_tabsize>0) - error(217); /* loose indentation */ - *lastindent=stmtindent; - indent_nowarn=FALSE; /* if warning was blocked, re-enable it */ - } /* if */ - switch (tok) { - case 0: - /* nothing */ - break; - case tNEW: - if (allow_decl) { - declloc(FALSE); - lastst=tNEW; - } else { - error(3); /* declaration only valid in a block */ - } /* if */ - break; - case tSTATIC: - if (allow_decl) { - declloc(TRUE); - lastst=tNEW; - } else { - error(3); /* declaration only valid in a block */ - } /* if */ - break; - case '{': - tok=fline; - if (!matchtoken('}')) /* {} is the empty statement */ - compound(tok==fline); - /* lastst (for "last statement") does not change */ - break; - case ';': - error(36); /* empty statement */ - break; - case tIF: - doif(); - lastst=tIF; - break; - case tWHILE: - dowhile(); - lastst=tWHILE; - break; - case tDO: - dodo(); - lastst=tDO; - break; - case tFOR: - dofor(); - lastst=tFOR; - break; - case tSWITCH: - doswitch(); - lastst=tSWITCH; - break; - case tCASE: - case tDEFAULT: - error(14); /* not in switch */ - break; - case tGOTO: - dogoto(); - lastst=tGOTO; - break; - case tLABEL: - dolabel(); - lastst=tLABEL; - break; - case tRETURN: - doreturn(); - lastst=tRETURN; - break; - case tBREAK: - dobreak(); - lastst=tBREAK; - break; - case tCONTINUE: - docont(); - lastst=tCONTINUE; - break; - case tEXIT: - doexit(); - lastst=tEXIT; - break; - case tASSERT: - doassert(); - lastst=tASSERT; - break; - case tSLEEP: - dosleep(); - lastst=tSLEEP; - break; - case tSTATE: - dostate(); - lastst=tSTATE; - break; - case tCONST: - decl_const(sLOCAL); - break; - case tENUM: - decl_enum(sLOCAL); - break; - default: /* non-empty expression */ - sc_allowproccall=optproccall; - lexpush(); /* analyze token later */ - doexpr(TRUE,TRUE,TRUE,TRUE,NULL,NULL,FALSE); - needtoken(tTERM); - lastst=tEXPR; - sc_allowproccall=FALSE; - } /* switch */ -} - -static void compound(int stmt_sameline) -{ - int indent=-1; - cell save_decl=declared; - int count_stmt=0; - - /* if there is more text on this line, we should adjust the statement indent */ - if (stmt_sameline) { - int i; - const unsigned char *p=lptr; - /* go back to the opening brace */ - while (*p!='{') { - assert(p>pline); - p--; - } /* while */ - assert(*p=='{'); /* it should be found */ - /* go forward, skipping white-space */ - p++; - while (*p<=' ' && *p!='\0') - p++; - assert(*p!='\0'); /* a token should be found */ - stmtindent=0; - for (i=0; i<(int)(p-pline); i++) - if (pline[i]=='\t' && sc_tabsize>0) - stmtindent += (int)(sc_tabsize - (stmtindent+sc_tabsize) % sc_tabsize); - else - stmtindent++; - } /* if */ - - nestlevel+=1; /* increase compound statement level */ - while (matchtoken('}')==0){ /* repeat until compound statement is closed */ - if (!freading){ - needtoken('}'); /* gives error: "expected token }" */ - break; - } else { - if (count_stmt>0 && (lastst==tRETURN || lastst==tBREAK || lastst==tCONTINUE)) - error(225); /* unreachable code */ - statement(&indent,TRUE); /* do a statement */ - count_stmt++; - } /* if */ - } /* while */ - if (lastst!=tRETURN) - destructsymbols(&loctab,nestlevel); - if (lastst!=tRETURN && lastst!=tGOTO) - modstk((int)(declared-save_decl)*sizeof(cell)); /* delete local variable space */ - testsymbols(&loctab,nestlevel,FALSE,TRUE); /* look for unused block locals */ - declared=save_decl; - delete_symbols(&loctab,nestlevel,FALSE,TRUE); /* erase local symbols, but - * retain block local labels - * (within the function) */ - nestlevel-=1; /* decrease compound statement level */ -} - -/* doexpr - * - * Global references: stgidx (referred to only) - */ -static int doexpr(int comma,int chkeffect,int allowarray,int mark_endexpr, - int *tag,symbol **symptr,int chkfuncresult) -{ - int index,ident; - int localstaging=FALSE; - cell val; - - if (!staging) { - stgset(TRUE); /* start stage-buffering */ - localstaging=TRUE; - assert(stgidx==0); - } /* if */ - index=stgidx; - errorset(sEXPRMARK); - do { - /* on second round through, mark the end of the previous expression */ - if (index!=stgidx) - markexpr(sEXPR,NULL,0); - sideeffect=FALSE; - ident=expression(&val,tag,symptr,chkfuncresult); - if (!allowarray && (ident==iARRAY || ident==iREFARRAY)) - error(33,"-unknown-"); /* array must be indexed */ - if (chkeffect && !sideeffect) - error(215); /* expression has no effect */ - sc_allowproccall=FALSE; /* cannot use "procedure call" syntax anymore */ - } while (comma && matchtoken(',')); /* more? */ - if (mark_endexpr) - markexpr(sEXPR,NULL,0); /* optionally, mark the end of the expression */ - errorset(sEXPRRELEASE); - if (localstaging) { - stgout(index); - stgset(FALSE); /* stop staging */ - } /* if */ - return ident; -} - -/* constexpr - */ -SC_FUNC int constexpr(cell *val,int *tag,symbol **symptr) -{ - int ident,index; - cell cidx; - - stgset(TRUE); /* start stage-buffering */ - stgget(&index,&cidx); /* mark position in code generator */ - errorset(sEXPRMARK); - ident=expression(val,tag,symptr,FALSE); - stgdel(index,cidx); /* scratch generated code */ - stgset(FALSE); /* stop stage-buffering */ - if (ident!=iCONSTEXPR) { - error(8); /* must be constant expression */ - if (val!=NULL) - *val=0; - if (tag!=NULL) - *tag=0; - if (symptr!=NULL) - *symptr=NULL; - } /* if */ - errorset(sEXPRRELEASE); - return (ident==iCONSTEXPR); -} - -/* test - * - * In the case a "simple assignment" operator ("=") is used within a test, - * the warning "possibly unintended assignment" is displayed. This routine - * sets the global variable "sc_intest" to true, it is restored upon termination. - * In the case the assignment was intended, use parantheses around the - * expression to avoid the warning; primary() sets "sc_intest" to 0. - * - * Global references: sc_intest (altered, but restored upon termination) - */ -static void test(int label,int parens,int invert) -{ - int index,tok; - cell cidx; - int ident,tag; - cell constval; - symbol *sym; - int localstaging=FALSE; - - if (!staging) { - stgset(TRUE); /* start staging */ - localstaging=TRUE; - #if !defined NDEBUG - stgget(&index,&cidx); /* should start at zero if started locally */ - assert(index==0); - #endif - } /* if */ - - PUSHSTK_I(sc_intest); - sc_intest=TRUE; - if (parens) - needtoken('('); - do { - stgget(&index,&cidx); /* mark position (of last expression) in - * code generator */ - ident=expression(&constval,&tag,&sym,TRUE); - tok=matchtoken(','); - if (tok) - markexpr(sEXPR,NULL,0); - } while (tok); /* do */ - if (parens) - needtoken(')'); - if (ident==iARRAY || ident==iREFARRAY) { - char *ptr=(sym->name!=NULL) ? sym->name : "-unknown-"; - error(33,ptr); /* array must be indexed */ - } /* if */ - if (ident==iCONSTEXPR) { /* constant expression */ - sc_intest=(short)POPSTK_I();/* restore stack */ - stgdel(index,cidx); - if (constval) { /* code always executed */ - error(206); /* redundant test: always non-zero */ - } else { - error(205); /* redundant code: never executed */ - jumplabel(label); - } /* if */ - if (localstaging) { - stgout(0); /* write "jumplabel" code */ - stgset(FALSE); /* stop staging */ - } /* if */ - return; - } /* if */ - if (tag!=0 && tag!=pc_addtag("bool")) - if (check_userop(lneg,tag,0,1,NULL,&tag)) - invert= !invert; /* user-defined ! operator inverted result */ - if (invert) - jmp_ne0(label); /* jump to label if true (different from 0) */ - else - jmp_eq0(label); /* jump to label if false (equal to 0) */ - markexpr(sEXPR,NULL,0); /* end expression (give optimizer a chance) */ - sc_intest=(short)POPSTK_I(); /* double typecast to avoid warning with Microsoft C */ - if (localstaging) { - stgout(0); /* output queue from the very beginning (see - * assert() when localstaging is set to TRUE) */ - stgset(FALSE); /* stop staging */ - } /* if */ -} - -static void doif(void) -{ - int flab1,flab2; - int ifindent; - - ifindent=stmtindent; /* save the indent of the "if" instruction */ - flab1=getlabel(); /* get label number for false branch */ - test(flab1,TRUE,FALSE); /* get expression, branch to flab1 if false */ - statement(NULL,FALSE); /* if true, do a statement */ - if (matchtoken(tELSE)==0){ /* if...else ? */ - setlabel(flab1); /* no, simple if..., print false label */ - } else { - /* to avoid the "dangling else" error, we want a warning if the "else" - * has a lower indent than the matching "if" */ - if (stmtindent0) - error(217); /* loose indentation */ - flab2=getlabel(); - if ((lastst!=tRETURN) && (lastst!=tGOTO)) - jumplabel(flab2); - setlabel(flab1); /* print false label */ - statement(NULL,FALSE); /* do "else" clause */ - setlabel(flab2); /* print true label */ - } /* endif */ -} - -static void dowhile(void) -{ - int wq[wqSIZE]; /* allocate local queue */ - - addwhile(wq); /* add entry to queue for "break" */ - setlabel(wq[wqLOOP]); /* loop label */ - /* The debugger uses the "line" opcode to be able to "break" out of - * a loop. To make sure that each loop has a line opcode, even for the - * tiniest loop, set it below the top of the loop - */ - setline(TRUE); - test(wq[wqEXIT],TRUE,FALSE); /* branch to wq[wqEXIT] if false */ - statement(NULL,FALSE); /* if so, do a statement */ - jumplabel(wq[wqLOOP]); /* and loop to "while" start */ - setlabel(wq[wqEXIT]); /* exit label */ - delwhile(); /* delete queue entry */ -} - -/* - * Note that "continue" will in this case not jump to the top of the loop, but - * to the end: just before the TRUE-or-FALSE testing code. - */ -static void dodo(void) -{ - int wq[wqSIZE],top; - - addwhile(wq); /* see "dowhile" for more info */ - top=getlabel(); /* make a label first */ - setlabel(top); /* loop label */ - statement(NULL,FALSE); - needtoken(tWHILE); - setlabel(wq[wqLOOP]); /* "continue" always jumps to WQLOOP. */ - setline(TRUE); - test(wq[wqEXIT],TRUE,FALSE); - jumplabel(top); - setlabel(wq[wqEXIT]); - delwhile(); - needtoken(tTERM); -} - -static void dofor(void) -{ - int wq[wqSIZE],skiplab; - cell save_decl; - int save_nestlevel,index; - int *ptr; - - save_decl=declared; - save_nestlevel=nestlevel; - - addwhile(wq); - skiplab=getlabel(); - needtoken('('); - if (matchtoken(';')==0) { - /* new variable declarations are allowed here */ - if (matchtoken(tNEW)) { - /* The variable in expr1 of the for loop is at a - * 'compound statement' level of it own. - */ - nestlevel++; - declloc(FALSE); /* declare local variable */ - } else { - doexpr(TRUE,TRUE,TRUE,TRUE,NULL,NULL,FALSE); /* expression 1 */ - needtoken(';'); - } /* if */ - } /* if */ - /* Adjust the "declared" field in the "while queue", in case that - * local variables were declared in the first expression of the - * "for" loop. These are deleted in separately, so a "break" or a "continue" - * must ignore these fields. - */ - ptr=readwhile(); - assert(ptr!=NULL); - ptr[wqBRK]=(int)declared; - ptr[wqCONT]=(int)declared; - jumplabel(skiplab); /* skip expression 3 1st time */ - setlabel(wq[wqLOOP]); /* "continue" goes to this label: expr3 */ - setline(TRUE); - /* Expressions 2 and 3 are reversed in the generated code: expression 3 - * precedes expression 2. When parsing, the code is buffered and marks for - * the start of each expression are insterted in the buffer. - */ - assert(!staging); - stgset(TRUE); /* start staging */ - assert(stgidx==0); - index=stgidx; - stgmark(sSTARTREORDER); - stgmark((char)(sEXPRSTART+0)); /* mark start of 2nd expression in stage */ - setlabel(skiplab); /* jump to this point after 1st expression */ - if (matchtoken(';')==0) { - test(wq[wqEXIT],FALSE,FALSE); /* expression 2 (jump to wq[wqEXIT] if false) */ - needtoken(';'); - } /* if */ - stgmark((char)(sEXPRSTART+1)); /* mark start of 3th expression in stage */ - if (matchtoken(')')==0) { - doexpr(TRUE,TRUE,TRUE,TRUE,NULL,NULL,FALSE); /* expression 3 */ - needtoken(')'); - } /* if */ - stgmark(sENDREORDER); /* mark end of reversed evaluation */ - stgout(index); - stgset(FALSE); /* stop staging */ - statement(NULL,FALSE); - jumplabel(wq[wqLOOP]); - setlabel(wq[wqEXIT]); - delwhile(); - - assert(nestlevel>=save_nestlevel); - if (nestlevel>save_nestlevel) { - /* Clean up the space and the symbol table for the local - * variable in "expr1". - */ - destructsymbols(&loctab,nestlevel); - modstk((int)(declared-save_decl)*sizeof(cell)); - testsymbols(&loctab,nestlevel,FALSE,TRUE); /* look for unused block locals */ - declared=save_decl; - delete_symbols(&loctab,nestlevel,FALSE,TRUE); - nestlevel=save_nestlevel; /* reset 'compound statement' nesting level */ - } /* if */ -} - -/* The switch statement is incompatible with its C sibling: - * 1. the cases are not drop through - * 2. only one instruction may appear below each case, use a compound - * instruction to execute multiple instructions - * 3. the "case" keyword accepts a comma separated list of values to - * match, it also accepts a range using the syntax "1 .. 4" - * - * SWITCH param - * PRI = expression result - * param = table offset (code segment) - * - */ -static void doswitch(void) -{ - int lbl_table,lbl_exit,lbl_case; - int tok,swdefault,casecount; - cell val; - char *str; - constvalue caselist = { NULL, "", 0, 0}; /* case list starts empty */ - constvalue *cse,*csp; - char labelname[sNAMEMAX+1]; - - needtoken('('); - doexpr(TRUE,FALSE,FALSE,FALSE,NULL,NULL,TRUE);/* evaluate switch expression */ - needtoken(')'); - /* generate the code for the switch statement, the label is the address - * of the case table (to be generated later). - */ - lbl_table=getlabel(); - lbl_case=0; /* just to avoid a compiler warning */ - ffswitch(lbl_table); - - needtoken('{'); - lbl_exit=getlabel(); /* get label number for jumping out of switch */ - swdefault=FALSE; - casecount=0; - do { - tok=lex(&val,&str); /* read in (new) token */ - switch (tok) { - case tCASE: - if (swdefault!=FALSE) - error(15); /* "default" case must be last in switch statement */ - lbl_case=getlabel(); - PUSHSTK_I(sc_allowtags); - sc_allowtags=FALSE; /* do not allow tagnames here */ - do { - casecount++; - - /* ??? enforce/document that, in a switch, a statement cannot start - * with a label. Then, you can search for: - * * the first semicolon (marks the end of a statement) - * * an opening brace (marks the start of a compound statement) - * and search for the right-most colon before that statement - * Now, by replacing the ':' by a special COLON token, you can - * parse all expressions until that special token. - */ - - constexpr(&val,NULL,NULL); - /* Search the insertion point (the table is kept in sorted order, so - * that advanced abstract machines can sift the case table with a - * binary search). Check for duplicate case values at the same time. - */ - for (csp=&caselist, cse=caselist.next; - cse!=NULL && cse->valuenext) - /* nothing */; - if (cse!=NULL && cse->value==val) - error(40,val); /* duplicate "case" label */ - /* Since the label is stored as a string in the "constvalue", the - * size of an identifier must be at least 8, as there are 8 - * hexadecimal digits in a 32-bit number. - */ - #if sNAMEMAX < 8 - #error Length of identifier (sNAMEMAX) too small. - #endif - assert(csp!=NULL); - assert(csp->next==cse); - insert_constval(csp,cse,itoh(lbl_case),val,0); - if (matchtoken(tDBLDOT)) { - cell end; - constexpr(&end,NULL,NULL); - if (end<=val) - error(50); /* invalid range */ - while (++val<=end) { - casecount++; - /* find the new insertion point */ - for (csp=&caselist, cse=caselist.next; - cse!=NULL && cse->valuenext) - /* nothing */; - if (cse!=NULL && cse->value==val) - error(40,val); /* duplicate "case" label */ - assert(csp!=NULL); - assert(csp->next==cse); - insert_constval(csp,cse,itoh(lbl_case),val,0); - } /* if */ - } /* if */ - } while (matchtoken(',')); - needtoken(':'); /* ':' ends the case */ - sc_allowtags=(short)POPSTK_I(); /* reset */ - setlabel(lbl_case); - statement(NULL,FALSE); - jumplabel(lbl_exit); - break; - case tDEFAULT: - if (swdefault!=FALSE) - error(16); /* multiple defaults in switch */ - lbl_case=getlabel(); - setlabel(lbl_case); - needtoken(':'); - swdefault=TRUE; - statement(NULL,FALSE); - /* Jump to lbl_exit, even thouh this is the last clause in the - * switch, because the jump table is generated between the last - * clause of the switch and the exit label. - */ - jumplabel(lbl_exit); - break; - case '}': - /* nothing, but avoid dropping into "default" */ - break; - default: - error(2); - indent_nowarn=TRUE; /* disable this check */ - tok='}'; /* break out of the loop after an error */ - } /* switch */ - } while (tok!='}'); - - #if !defined NDEBUG - /* verify that the case table is sorted (unfortunatly, duplicates can - * occur; there really shouldn't be duplicate cases, but the compiler - * may not crash or drop into an assertion for a user error). */ - for (cse=caselist.next; cse!=NULL && cse->next!=NULL; cse=cse->next) - assert(cse->value <= cse->next->value); - #endif - /* generate the table here, before lbl_exit (general jump target) */ - setlabel(lbl_table); - assert(swdefault==FALSE || swdefault==TRUE); - if (swdefault==FALSE) { - /* store lbl_exit as the "none-matched" label in the switch table */ - strcpy(labelname,itoh(lbl_exit)); - } else { - /* lbl_case holds the label of the "default" clause */ - strcpy(labelname,itoh(lbl_case)); - } /* if */ - ffcase(casecount,labelname,TRUE); - /* generate the rest of the table */ - for (cse=caselist.next; cse!=NULL; cse=cse->next) - ffcase(cse->value,cse->name,FALSE); - - setlabel(lbl_exit); - delete_consttable(&caselist); /* clear list of case labels */ -} - -static void doassert(void) -{ - int flab1,index; - cell cidx; - - if ((sc_debug & sCHKBOUNDS)!=0) { - flab1=getlabel(); /* get label number for "OK" branch */ - test(flab1,FALSE,TRUE); /* get expression and branch to flab1 if true */ - insert_dbgline(fline); /* make sure we can find the correct line number */ - ffabort(xASSERTION); - setlabel(flab1); - } else { - stgset(TRUE); /* start staging */ - stgget(&index,&cidx); /* mark position in code generator */ - do { - expression(NULL,NULL,NULL,FALSE); - stgdel(index,cidx); /* just scrap the code */ - } while (matchtoken(',')); - stgset(FALSE); /* stop staging */ - } /* if */ - needtoken(tTERM); -} - -static void dogoto(void) -{ - char *st; - cell val; - symbol *sym; - - if (lex(&val,&st)==tSYMBOL) { - sym=fetchlab(st); - jumplabel((int)sym->addr); - sym->usage|=uREAD; /* set "uREAD" bit */ - // ??? if the label is defined (check sym->usage & uDEFINE), check - // sym->compound (nesting level of the label) against nestlevel; - // if sym->compound < nestlevel, call the destructor operator - } else { - error(20,st); /* illegal symbol name */ - } /* if */ - needtoken(tTERM); -} - -static void dolabel(void) -{ - char *st; - cell val; - symbol *sym; - - tokeninfo(&val,&st); /* retrieve label name again */ - if (find_constval(&tagname_tab,st,0)!=NULL) - error(221,st); /* label name shadows tagname */ - sym=fetchlab(st); - setlabel((int)sym->addr); - /* since one can jump around variable declarations or out of compound - * blocks, the stack must be manually adjusted - */ - setstk(-declared*sizeof(cell)); - sym->usage|=uDEFINE; /* label is now defined */ -} - -/* fetchlab - * - * Finds a label from the (local) symbol table or adds one to it. - * Labels are local in scope. - * - * Note: The "_usage" bit is set to zero. The routines that call "fetchlab()" - * must set this bit accordingly. - */ -static symbol *fetchlab(char *name) -{ - symbol *sym; - - sym=findloc(name); /* labels are local in scope */ - if (sym){ - if (sym->ident!=iLABEL) - error(19,sym->name); /* not a label: ... */ - } else { - sym=addsym(name,getlabel(),iLABEL,sLOCAL,0,0); - assert(sym!=NULL); /* fatal error 103 must be given on error */ - sym->x.declared=(int)declared; - sym->compound=nestlevel; - } /* if */ - return sym; -} - -static int is_variadic(symbol *sym) -{ - arginfo *arg; - - assert(sym->ident==iFUNCTN); - for (arg = sym->dim.arglist; arg->ident; arg++) { - if (arg->ident == iVARARGS) - return TRUE; - arg++; - } - return FALSE; -} - -/* doreturn - * - * Global references: rettype (altered) - */ -static void doreturn(void) -{ - int tag,ident; - int level; - symbol *sym,*sub; - - if (!matchtoken(tTERM)) { - /* "return " */ - if ((rettype & uRETNONE)!=0) - error(78); /* mix "return;" and "return value;" */ - ident=doexpr(TRUE,FALSE,TRUE,TRUE,&tag,&sym,TRUE); - needtoken(tTERM); - /* see if this function already has a sub type (an array attached) */ - sub=finddepend(curfunc); - assert(sub==NULL || sub->ident==iREFARRAY); - if ((rettype & uRETVALUE)!=0) { - int retarray=(ident==iARRAY || ident==iREFARRAY); - /* there was an earlier "return" statement in this function */ - if ((sub==NULL && retarray) || (sub!=NULL && !retarray)) - error(79); /* mixing "return array;" and "return value;" */ - } /* if */ - rettype|=uRETVALUE; /* function returns a value */ - /* check tagname with function tagname */ - assert(curfunc!=NULL); - if (!matchtag(curfunc->tag,tag,TRUE)) - error(213); /* tagname mismatch */ - if (ident==iARRAY || ident==iREFARRAY) { - int dim[sDIMEN_MAX],numdim=0; - cell arraysize; - assert(sym!=NULL); - if (sub!=NULL) { - assert(sub->ident==iREFARRAY); - /* this function has an array attached already; check that the current - * "return" statement returns exactly the same array - */ - level=sym->dim.array.level; - if (sub->dim.array.level!=level) { - error(48); /* array dimensions must match */ - } else { - for (numdim=0; numdim<=level; numdim++) { - dim[numdim]=(int)sub->dim.array.length; - if (sym->dim.array.length!=dim[numdim]) - error(47); /* array sizes must match */ - if (numdimdim.array.level; - for (numdim=0; numdim<=level; numdim++) { - dim[numdim]=(int)sub->dim.array.length; - idxtag[numdim]=sub->x.idxtag; - if (numdimname); - } /* for */ - /* the address of the array is stored in a hidden parameter; the address - * of this parameter is 1 + the number of parameters (times the size of - * a cell) + the size of the stack frame and the return address - * base + 0*sizeof(cell) == previous "base" - * base + 1*sizeof(cell) == function return address - * base + 2*sizeof(cell) == number of arguments - * base + 3*sizeof(cell) == first argument of the function - * ... - * base + ((n-1)+3)*sizeof(cell) == last argument of the function - * base + (n+3)*sizeof(cell) == hidden parameter with array address - */ - assert(curfunc!=NULL); - assert(curfunc->dim.arglist!=NULL); - for (argcount=0; curfunc->dim.arglist[argcount].ident!=0; argcount++) - /* nothing */; - sub=addvariable(curfunc->name,(argcount+3)*sizeof(cell),iREFARRAY,sGLOBAL,curfunc->tag,dim,numdim,idxtag); - sub->parent=curfunc; - } /* if */ - /* get the hidden parameter, copy the array (the array is on the heap; - * it stays on the heap for the moment, and it is removed -usually- at - * the end of the expression/statement, see expression() in SC3.C) - */ - if (is_variadic(curfunc)) { - load_hidden_arg(); - } else { +/* Pawn compiler + * + * Function and variable definition and declaration, statement parser. + * + * Copyright (c) ITB CompuPhase, 1997-2005 + * + * This software is provided "as-is", without any express or implied warranty. + * In no event will the authors be held liable for any damages arising from + * the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software in + * a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + */ + +#include +#include +#include +#include +#include +#include +#include + +#if defined __WIN32__ || defined _WIN32 || defined __MSDOS__ + #include + #include +#endif + +#if defined LINUX || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__ + #include + #include /* from BinReloc, see www.autopackage.org */ + #include +#endif + +#if defined FORTIFY + #include "fortify.h" +#endif + +#if defined __BORLANDC__ || defined __WATCOMC__ + #include + static unsigned total_drives; /* dummy variable */ + #define dos_setdrive(i) _dos_setdrive(i,&total_drives) +#elif defined _MSC_VER && defined _WIN32 + #include /* for _chdrive() */ + #define dos_setdrive(i) _chdrive(i) +#endif +#if defined __BORLANDC__ + #include /* for chdir() */ +#elif defined __WATCOMC__ + #include /* for chdir() */ +#endif +#if defined __WIN32__ || defined _WIN32 || defined _Windows + #include +#endif + +#include + +#include "sc.h" +#define VERSION_STR "3.0.3367-amxx" +#define VERSION_INT 0x300 + +int pc_anytag; + +static void resetglobals(void); +static void initglobals(void); +static void setopt(int argc,char **argv,char *oname,char *ename,char *pname, + char *rname,char *codepage); +static void setconfig(char *root); +static void setcaption(void); +static void about(void); +static void setconstants(void); +static void parse(void); +static void dumplits(void); +static void dumpzero(int count); +static void declfuncvar(int fpublic,int fstatic,int fstock,int fconst); +static void declglb(char *firstname,int firsttag,int fpublic,int fstatic, + int stock,int fconst); +static int declloc(int fstatic); +static void decl_const(int table); +static void decl_enum(int table); +static cell needsub(int *tag,constvalue **enumroot); +static void initials(int ident,int tag,cell *size,int dim[],int numdim, + constvalue *enumroot); +static cell initarray(int ident,int tag,int dim[],int numdim,int cur, + int startlit,int counteddim[],constvalue *lastdim, + constvalue *enumroot,int *errorfound); +static cell initvector(int ident,int tag,cell size,int fillzero, + constvalue *enumroot,int *errorfound); +static cell init(int ident,int *tag,int *errorfound); +static void funcstub(int native); +static int newfunc(char *firstname,int firsttag,int fpublic,int fstatic,int stock); +static int declargs(symbol *sym); +static void doarg(char *name,int ident,int offset,int tags[],int numtags, + int fpublic,int fconst,arginfo *arg); +static void make_report(symbol *root,FILE *log,char *sourcefile); +static void reduce_referrers(symbol *root); +static long max_stacksize(symbol *root); +static int testsymbols(symbol *root,int level,int testlabs,int testconst); +static void destructsymbols(symbol *root,int level); +static constvalue *find_constval_byval(constvalue *table,cell val); +static void statement(int *lastindent,int allow_decl); +static void compound(int stmt_sameline); +static int doexpr(int comma,int chkeffect,int allowarray,int mark_endexpr, + int *tag,symbol **symptr,int chkfuncresult); +static void doassert(void); +static void doexit(void); +static void test(int label,int parens,int invert); +static void doif(void); +static void dowhile(void); +static void dodo(void); +static void dofor(void); +static void doswitch(void); +static void dogoto(void); +static void dolabel(void); +static symbol *fetchlab(char *name); +static void doreturn(void); +static void dobreak(void); +static void docont(void); +static void dosleep(void); +static void dostate(void); +static void addwhile(int *ptr); +static void delwhile(void); +static int *readwhile(void); +static void inst_datetime_defines(void); + +static int lastst = 0; /* last executed statement type */ +static int nestlevel = 0; /* number of active (open) compound statements */ +static int rettype = 0; /* the type that a "return" expression should have */ +static int skipinput = 0; /* number of lines to skip from the first input file */ +static int optproccall = TRUE; /* support "procedure call" */ +static int verbosity = 1; /* verbosity level, 0=quiet, 1=normal, 2=verbose */ +static int sc_reparse = 0; /* needs 3th parse because of changed prototypes? */ +static int sc_parsenum = 0; /* number of the extra parses */ +static int wq[wqTABSZ]; /* "while queue", internal stack for nested loops */ +static int *wqptr; /* pointer to next entry */ +#if !defined SC_LIGHT + static char *sc_documentation=NULL;/* main documentation */ +#endif +#if defined __WIN32__ || defined _WIN32 || defined _Windows + static HWND hwndFinish = 0; +#endif + +#if !defined NO_MAIN + +#if defined __TURBOC__ && !defined __32BIT__ + extern unsigned int _stklen = 0x2000; +#endif + +int main(int argc, char *argv[]) +{ + return pc_compile(argc,argv); +} + +/* pc_printf() + * Called for general purpose "console" output. This function prints general + * purpose messages; errors go through pc_error(). The function is modelled + * after printf(). + */ +int pc_printf(const char *message,...) +{ + int ret; + va_list argptr; + + va_start(argptr,message); + ret=vprintf(message,argptr); + va_end(argptr); + + return ret; +} + +/* pc_error() + * Called for producing error output. + * number the error number (as documented in the manual) + * message a string describing the error with embedded %d and %s tokens + * filename the name of the file currently being parsed + * firstline the line number at which the expression started on which + * the error was found, or -1 if there is no "starting line" + * lastline the line number at which the error was detected + * argptr a pointer to the first of a series of arguments (for macro + * "va_arg") + * Return: + * If the function returns 0, the parser attempts to continue compilation. + * On a non-zero return value, the parser aborts. + */ +int pc_error(int number,char *message,char *filename,int firstline,int lastline,va_list argptr) +{ +static char *prefix[3]={ "error", "fatal error", "warning" }; + + if (number!=0) { + char *pre; + + pre=prefix[number/100]; + if (firstline>=0) + fprintf(stderr,"%s(%d -- %d) : %s %03d: ",filename,firstline,lastline,pre,number); + else + fprintf(stderr,"%s(%d) : %s %03d: ",filename,lastline,pre,number); + } /* if */ + vfprintf(stderr,message,argptr); + fflush(stderr); + return 0; +} + +/* pc_opensrc() + * Opens a source file (or include file) for reading. The "file" does not have + * to be a physical file, one might compile from memory. + * filename the name of the "file" to read from + * Return: + * The function must return a pointer, which is used as a "magic cookie" to + * all I/O functions. When failing to open the file for reading, the + * function must return NULL. + * Note: + * Several "source files" may be open at the same time. Specifically, one + * file can be open for reading and another for writing. + */ +void *pc_opensrc(char *filename) +{ + return fopen(filename,"r"); +} + +/* pc_createsrc() + * Creates/overwrites a source file for writing. The "file" does not have + * to be a physical file, one might compile from memory. + * filename the name of the "file" to create + * Return: + * The function must return a pointer, which is used as a "magic cookie" to + * all I/O functions. When failing to open the file for reading, the + * function must return NULL. + * Note: + * Several "source files" may be open at the same time. Specifically, one + * file can be open for reading and another for writing. + */ +void *pc_createsrc(char *filename) +{ + return fopen(filename,"w"); +} + +/* pc_closesrc() + * Closes a source file (or include file). The "handle" parameter has the + * value that pc_opensrc() returned in an earlier call. + */ +void pc_closesrc(void *handle) +{ + assert(handle!=NULL); + fclose((FILE*)handle); +} + +/* pc_resetsrc() + * "position" may only hold a pointer that was previously obtained from + * pc_getpossrc() + */ +void pc_resetsrc(void *handle,void *position) +{ + assert(handle!=NULL); + fsetpos((FILE*)handle,(fpos_t *)position); +} + +/* pc_readsrc() + * Reads a single line from the source file (or up to a maximum number of + * characters if the line in the input file is too long). + */ +char *pc_readsrc(void *handle,unsigned char *target,int maxchars) +{ + return fgets((char*)target,maxchars,(FILE*)handle); +} + +/* pc_writesrc() + * Writes to to the source file. There is no automatic line ending; to end a + * line, write a "\n". + */ +int pc_writesrc(void *handle,unsigned char *source) +{ + return fputs((char*)source,(FILE*)handle) >= 0; +} + +void *pc_getpossrc(void *handle) +{ + static fpos_t lastpos; /* may need to have a LIFO stack of such positions */ + + fgetpos((FILE*)handle,&lastpos); + return &lastpos; +} + +int pc_eofsrc(void *handle) +{ + return feof((FILE*)handle); +} + +/* should return a pointer, which is used as a "magic cookie" to all I/O + * functions; return NULL for failure + */ +void *pc_openasm(char *filename) +{ + #if defined __MSDOS__ || defined SC_LIGHT + return fopen(filename,"w+"); + #else + return mfcreate(filename); + #endif +} + +void pc_closeasm(void *handle, int deletefile) +{ + #if defined __MSDOS__ || defined SC_LIGHT + if (handle!=NULL) + fclose((FILE*)handle); + if (deletefile) + remove(outfname); + #else + if (handle!=NULL) { + if (!deletefile) + mfdump((MEMFILE*)handle); + mfclose((MEMFILE*)handle); + } /* if */ + #endif +} + +void pc_resetasm(void *handle) +{ + assert(handle!=NULL); + #if defined __MSDOS__ || defined SC_LIGHT + fflush((FILE*)handle); + fseek((FILE*)handle,0,SEEK_SET); + #else + mfseek((MEMFILE*)handle,0,SEEK_SET); + #endif +} + +int pc_writeasm(void *handle,char *string) +{ + #if defined __MSDOS__ || defined SC_LIGHT + return fputs(string,(FILE*)handle) >= 0; + #else + return mfputs((MEMFILE*)handle,string); + #endif +} + +char *pc_readasm(void *handle, char *string, int maxchars) +{ + #if defined __MSDOS__ || defined SC_LIGHT + return fgets(string,maxchars,(FILE*)handle); + #else + return mfgets((MEMFILE*)handle,string,maxchars); + #endif +} + +/* Should return a pointer, which is used as a "magic cookie" to all I/O + * functions; return NULL for failure. + */ +void *pc_openbin(char *filename) +{ + return fopen(filename,"wb"); +} + +void pc_closebin(void *handle,int deletefile) +{ + fclose((FILE*)handle); + if (deletefile) + remove(binfname); +} + +/* pc_resetbin() + * Can seek to any location in the file. + * The offset is always from the start of the file. + */ +void pc_resetbin(void *handle,long offset) +{ + fflush((FILE*)handle); + fseek((FILE*)handle,offset,SEEK_SET); +} + +int pc_writebin(void *handle,void *buffer,int size) +{ + return (int)fwrite(buffer,1,size,(FILE*)handle) == size; +} + +long pc_lengthbin(void *handle) +{ + return ftell((FILE*)handle); +} + +#endif /* !defined NO_MAIN */ + +void inst_datetime_defines() +{ + char date[64]; + char ltime[64]; + time_t td; + struct tm *curtime; + + time(&td); + curtime = localtime(&td); + + strftime(date, 31, "\"%m/%d/%Y\"", curtime); + strftime(ltime, 31, "\"%H:%M:%S\"", curtime); + + insert_subst("__DATE__", date, 8); + insert_subst("__TIME__", ltime, 8); +} + + +/* "main" of the compiler + */ +#if defined __cplusplus + extern "C" +#endif +int pc_compile(int argc, char *argv[]) +{ + int entry,i,jmpcode; + int retcode; + char incfname[_MAX_PATH]; + char reportname[_MAX_PATH]; + char codepage[MAXCODEPAGE+1]; + FILE *binf; + void *inpfmark; + int lcl_packstr,lcl_needsemicolon,lcl_tabsize; + #if !defined SC_LIGHT + int hdrsize=0; + #endif + + /* set global variables to their initial value */ + binf=NULL; + initglobals(); + errorset(sRESET); + errorset(sEXPRRELEASE); + lexinit(); + + /* make sure that we clean up on a fatal error; do this before the first + * call to error(). */ + if ((jmpcode=setjmp(errbuf))!=0) + goto cleanup; + + /* allocate memory for fixed tables */ + inpfname=(char*)malloc(_MAX_PATH); + if (inpfname==NULL) + error(103); /* insufficient memory */ + litq=(cell*)malloc(litmax*sizeof(cell)); + if (litq==NULL) + error(103); /* insufficient memory */ + if (!phopt_init()) + error(103); /* insufficient memory */ + + setopt(argc,argv,outfname,errfname,incfname,reportname,codepage); + /* set output names that depend on the input name */ + if (sc_listing) + set_extension(outfname,".lst",TRUE); + else + set_extension(outfname,".asm",TRUE); + strcpy(binfname,outfname); + set_extension(binfname,".amx",TRUE); + if (strlen(errfname)!=0) + remove(errfname); /* delete file on startup */ + else if (verbosity>0) + setcaption(); + setconfig(argv[0]); /* the path to the include and codepage files */ + sc_ctrlchar_org=sc_ctrlchar; + lcl_packstr=sc_packstr; + lcl_needsemicolon=sc_needsemicolon; + lcl_tabsize=sc_tabsize; + #if !defined NO_CODEPAGE + if (!cp_set(codepage)) /* set codepage */ + error(108); /* codepage mapping file not found */ + #endif + /* optionally create a temporary input file that is a collection of all + * input files + */ + assert(get_sourcefile(0)!=NULL); /* there must be at least one source file */ + if (get_sourcefile(1)!=NULL) { + /* there are at least two or more source files */ + char *tname,*sname; + FILE *ftmp,*fsrc; + int fidx; + #if defined __WIN32__ || defined _WIN32 + tname=_tempnam(NULL,"pawn"); + #elif defined __MSDOS__ || defined _Windows + tname=tempnam(NULL,"pawn"); + #elif defined(MACOS) && !defined(__MACH__) + /* tempnam is not supported for the Macintosh CFM build. */ + error(104,get_sourcefile(1)); + tname=NULL; + sname=NULL; + #else + char *buffer = strdup(P_tmpdir "/pawn.XXXXXX"); + close(mkstemp(buffer)); + tname=buffer; + #endif + ftmp=(FILE*)pc_createsrc(tname); + for (fidx=0; (sname=get_sourcefile(fidx))!=NULL; fidx++) { + unsigned char tstring[128]; + fsrc=(FILE*)pc_opensrc(sname); + if (fsrc==NULL) + error(100,sname); + pc_writesrc(ftmp,(unsigned char*)"#file "); + pc_writesrc(ftmp,(unsigned char*)sname); + pc_writesrc(ftmp,(unsigned char*)"\n"); + while (!pc_eofsrc(fsrc)) { + pc_readsrc(fsrc,tstring,sizeof tstring); + pc_writesrc(ftmp,tstring); + } /* while */ + pc_closesrc(fsrc); + } /* for */ + pc_closesrc(ftmp); + strcpy(inpfname,tname); + free(tname); + } else { + strcpy(inpfname,get_sourcefile(0)); + } /* if */ + inpf_org=(FILE*)pc_opensrc(inpfname); + if (inpf_org==NULL) + error(100,inpfname); + freading=TRUE; + outf=(FILE*)pc_openasm(outfname); /* first write to assembler file (may be temporary) */ + if (outf==NULL) + error(101,outfname); + /* immediately open the binary file, for other programs to check */ + if (sc_asmfile || sc_listing) { + binf=NULL; + } else { + binf=(FILE*)pc_openbin(binfname); + if (binf==NULL) + error(101,binfname); + } /* if */ + setconstants(); /* set predefined constants and tagnames */ + for (i=0; i0) { + if (strcmp(incfname,sDEF_PREFIX)==0) { + plungefile(incfname,FALSE,TRUE); /* parse "default.inc" */ + } else { + if (!plungequalifiedfile(incfname)) /* parse "prefix" include file */ + error(100,incfname); /* cannot read from ... (fatal error) */ + } /* if */ + } /* if */ + preprocess(); /* fetch first line */ + parse(); /* process all input */ + sc_parsenum++; + } while (sc_reparse); + + /* second (or third) pass */ + sc_status=statWRITE; /* set, to enable warnings */ + state_conflict(&glbtab); + + /* write a report, if requested */ + #if !defined SC_LIGHT + if (sc_makereport) { + FILE *frep=stdout; + if (strlen(reportname)>0) + frep=fopen(reportname,"wb"); /* avoid translation of \n to \r\n in DOS/Windows */ + if (frep!=NULL) { + make_report(&glbtab,frep,get_sourcefile(0)); + if (strlen(reportname)>0) + fclose(frep); + } /* if */ + if (sc_documentation!=NULL) { + free(sc_documentation); + sc_documentation=NULL; + } /* if */ + } /* if */ + #endif + if (sc_listing) + goto cleanup; + + /* ??? for re-parsing the listing file instead of the original source + * file (and doing preprocessing twice): + * - close input file, close listing file + * - re-open listing file for reading (inpf) + * - open assembler file (outf) + */ + + /* reset "defined" flag of all functions and global variables */ + reduce_referrers(&glbtab); + delete_symbols(&glbtab,0,TRUE,FALSE); + #if !defined NO_DEFINE + delete_substtable(); + inst_datetime_defines(); + #endif + resetglobals(); + sc_ctrlchar=sc_ctrlchar_org; + sc_packstr=lcl_packstr; + sc_needsemicolon=lcl_needsemicolon; + sc_tabsize=lcl_tabsize; + errorset(sRESET); + /* reset the source file */ + inpf=inpf_org; + freading=TRUE; + pc_resetsrc(inpf,inpfmark); /* reset file position */ + fline=skipinput; /* reset line number */ + lexinit(); /* clear internal flags of lex() */ + sc_status=statWRITE; /* allow to write --this variable was reset by resetglobals() */ + writeleader(&glbtab); + insert_dbgfile(inpfname); + if (strlen(incfname)>0) { + if (strcmp(incfname,sDEF_PREFIX)==0) + plungefile(incfname,FALSE,TRUE); /* parse "default.inc" (again) */ + else + plungequalifiedfile(incfname); /* parse implicit include file (again) */ + } /* if */ + preprocess(); /* fetch first line */ + parse(); /* process all input */ + /* inpf is already closed when readline() attempts to pop of a file */ + writetrailer(); /* write remaining stuff */ + + entry=testsymbols(&glbtab,0,TRUE,FALSE); /* test for unused or undefined + * functions and variables */ + if (!entry) + error(13); /* no entry point (no public functions) */ + +cleanup: + if (inpf!=NULL) /* main source file is not closed, do it now */ + pc_closesrc(inpf); + /* write the binary file (the file is already open) */ + if (!(sc_asmfile || sc_listing) && errnum==0 && jmpcode==0) { + assert(binf!=NULL); + pc_resetasm(outf); /* flush and loop back, for reading */ + #if !defined SC_LIGHT + hdrsize= + #endif + assemble(binf,outf); /* assembler file is now input */ + } /* if */ + if (outf!=NULL) { + pc_closeasm(outf,!(sc_asmfile || sc_listing)); + outf=NULL; + } /* if */ + if (binf!=NULL) { + pc_closebin(binf,errnum!=0); + binf=NULL; + } /* if */ + + #if !defined SC_LIGHT + if (errnum==0 && strlen(errfname)==0) { + long stacksize=max_stacksize(&glbtab); + int flag_exceed=0; + if (sc_amxlimit > 0 && (long)(hdrsize+code_idx+glb_declared*sizeof(cell)+sc_stksize*sizeof(cell)) >= sc_amxlimit) + flag_exceed=1; + if ((sc_debug & sSYMBOLIC)!=0 || verbosity>=2 || stacksize+32>=(long)sc_stksize || flag_exceed) { + pc_printf("Header size: %8ld bytes\n", (long)hdrsize); + pc_printf("Code size: %8ld bytes\n", (long)code_idx); + pc_printf("Data size: %8ld bytes\n", (long)glb_declared*sizeof(cell)); + pc_printf("Stack/heap size: %8ld bytes\n", (long)sc_stksize*sizeof(cell)); + if (stacksize>0) + pc_printf("Estimated usage: %8ld bytes\n", stacksize*sizeof(cell)); + pc_printf("Total requirements:%8ld bytes\n", (long)hdrsize+(long)code_idx+(long)glb_declared*sizeof(cell)+(long)sc_stksize*sizeof(cell)); + } /* if */ + if (flag_exceed) + error(106,sc_amxlimit); /* this causes a jump back to label "cleanup" */ + } /* if */ + #endif + + if (inpfname!=NULL) { + if (get_sourcefile(1)!=NULL) + remove(inpfname); /* the "input file" was in fact a temporary file */ + free(inpfname); + } /* if */ + if (litq!=NULL) + free(litq); + phopt_cleanup(); + stgbuffer_cleanup(); + clearstk(); + assert(jmpcode!=0 || loctab.next==NULL);/* on normal flow, local symbols + * should already have been deleted */ + delete_symbols(&loctab,0,TRUE,TRUE); /* delete local variables if not yet + * done (i.e. on a fatal error) */ + delete_symbols(&glbtab,0,TRUE,TRUE); + delete_consttable(&tagname_tab); + delete_consttable(&libname_tab); + delete_consttable(&sc_automaton_tab); + delete_consttable(&sc_state_tab); + state_deletetable(); + delete_aliastable(); + delete_pathtable(); + delete_sourcefiletable(); + delete_dbgstringtable(); + #if !defined NO_DEFINE + delete_substtable(); + #endif + #if !defined SC_LIGHT + delete_docstringtable(); + if (sc_documentation!=NULL) + free(sc_documentation); + #endif + delete_autolisttable(); + if (errnum!=0) { + if (strlen(errfname)==0) + pc_printf("\n%d Error%s.\n",errnum,(errnum>1) ? "s" : ""); + retcode=2; + } else if (warnnum!=0){ + if (strlen(errfname)==0) + pc_printf("\n%d Warning%s.\n",warnnum,(warnnum>1) ? "s" : ""); + retcode=1; + } else { + retcode=jmpcode; + if (retcode==0 && verbosity>=2) + pc_printf("\nDone.\n"); + } /* if */ + #if defined __WIN32__ || defined _WIN32 || defined _Windows + if (IsWindow(hwndFinish)) + PostMessage(hwndFinish,RegisterWindowMessage("PawnNotify"),retcode,0L); + #endif + #if defined FORTIFY + Fortify_ListAllMemory(); + #endif + return retcode; +} + +#if defined __cplusplus + extern "C" +#endif +int pc_addconstant(char *name,cell value,int tag) +{ + errorset(sFORCESET); /* make sure error engine is silenced */ + sc_status=statIDLE; + add_constant(name,value,sGLOBAL,tag); + return 1; +} + +#if defined __cplusplus + extern "C" +#endif +int pc_addtag(char *name) +{ + cell val; + constvalue *ptr; + int last,tag; + + if (name==NULL) { + /* no tagname was given, check for one */ + if (lex(&val,&name)!=tLABEL) { + lexpush(); + return 0; /* untagged */ + } /* if */ + } /* if */ + + assert(strchr(name,':')==NULL); /* colon should already have been stripped */ + last=0; + ptr=tagname_tab.next; + while (ptr!=NULL) { + tag=(int)(ptr->value & TAGMASK); + if (strcmp(name,ptr->name)==0) + return tag; /* tagname is known, return its sequence number */ + tag &= (int)~FIXEDTAG; + if (tag>last) + last=tag; + ptr=ptr->next; + } /* while */ + + /* tagname currently unknown, add it */ + tag=last+1; /* guaranteed not to exist already */ + if (isupper(*name)) + tag |= (int)FIXEDTAG; + append_constval(&tagname_tab,name,(cell)tag,0); + return tag; +} + +static void resetglobals(void) +{ + /* reset the subset of global variables that is modified by the first pass */ + curfunc=NULL; /* pointer to current function */ + lastst=0; /* last executed statement type */ + nestlevel=0; /* number of active (open) compound statements */ + rettype=0; /* the type that a "return" expression should have */ + litidx=0; /* index to literal table */ + stgidx=0; /* index to the staging buffer */ + sc_labnum=0; /* top value of (internal) labels */ + staging=0; /* true if staging output */ + declared=0; /* number of local cells declared */ + glb_declared=0; /* number of global cells declared */ + code_idx=0; /* number of bytes with generated code */ + ntv_funcid=0; /* incremental number of native function */ + curseg=0; /* 1 if currently parsing CODE, 2 if parsing DATA */ + freading=FALSE; /* no input file ready yet */ + fline=0; /* the line number in the current file */ + fnumber=0; /* the file number in the file table (debugging) */ + fcurrent=0; /* current file being processed (debugging) */ + sc_intest=FALSE; /* true if inside a test */ + sideeffect=0; /* true if an expression causes a side-effect */ + stmtindent=0; /* current indent of the statement */ + indent_nowarn=FALSE; /* do not skip warning "217 loose indentation" */ + sc_allowtags=TRUE; /* allow/detect tagnames */ + sc_status=statIDLE; + sc_allowproccall=FALSE; + pc_addlibtable=TRUE; /* by default, add a "library table" to the output file */ + sc_alignnext=FALSE; + pc_docexpr=FALSE; +} + +static void initglobals(void) +{ + resetglobals(); + + sc_asmfile=FALSE; /* do not create .ASM file */ + sc_listing=FALSE; /* do not create .LST file */ + skipinput=0; /* number of lines to skip from the first input file */ + sc_ctrlchar=CTRL_CHAR;/* the escape character */ + litmax=sDEF_LITMAX; /* current size of the literal table */ + errnum=0; /* number of errors */ + warnnum=0; /* number of warnings */ + optproccall=TRUE; /* support "procedure call" */ +#if PAWN_CELL_SIZE==32 + verbosity=1; /* verbosity level, no copyright banner */ +#else + verbosity=0; +#endif + sc_debug=sCHKBOUNDS|sSYMBOLIC; /* by default: bounds checking+assertions */ + sc_packstr=FALSE; /* strings are unpacked by default */ + sc_compress=FALSE; + sc_needsemicolon=FALSE;/* semicolon required to terminate expressions? */ + sc_dataalign=sizeof(cell); + sc_stksize=sDEF_AMXSTACK;/* default stack size */ + sc_amxlimit=0; /* no limit on size of the abstract machine */ + sc_tabsize=8; /* assume a TAB is 8 spaces */ + sc_rationaltag=0; /* assume no support for rational numbers */ + rational_digits=0; /* number of fractional digits */ + + outfname[0]='\0'; /* output file name */ + errfname[0]='\0'; /* error file name */ + inpf=NULL; /* file read from */ + inpfname=NULL; /* pointer to name of the file currently read from */ + outf=NULL; /* file written to */ + litq=NULL; /* the literal queue */ + glbtab.next=NULL; /* clear global variables/constants table */ + loctab.next=NULL; /* " local " / " " */ + tagname_tab.next=NULL;/* tagname table */ + libname_tab.next=NULL;/* library table (#pragma library "..." syntax) */ + + pline[0]='\0'; /* the line read from the input file */ + lptr=NULL; /* points to the current position in "pline" */ + curlibrary=NULL; /* current library */ + inpf_org=NULL; /* main source file */ + + wqptr=wq; /* initialize while queue pointer */ + +#if !defined SC_LIGHT + sc_documentation=NULL; + sc_makereport=FALSE; /* do not generate a cross-reference report */ +#endif +} + +/* set_extension + * Set the default extension, or force an extension. To erase the + * extension of a filename, set "extension" to an empty string. + */ +SC_FUNC void set_extension(char *filename,char *extension,int force) +{ + char *ptr; + + assert(extension!=NULL && (*extension=='\0' || *extension=='.')); + assert(filename!=NULL); + ptr=strrchr(filename,'.'); + if (ptr!=NULL) { + /* ignore extension on a directory or at the start of the filename */ + if (strchr(ptr,DIRSEP_CHAR)!=NULL || ptr==filename || *(ptr-1)==DIRSEP_CHAR) + ptr=NULL; + } /* if */ + if (force && ptr!=NULL) + *ptr='\0'; /* set zero terminator at the position of the period */ + if (force || ptr==NULL) + strcat(filename,extension); +} + +static const char *option_value(const char *optptr) +{ + return (*(optptr+1)=='=' || *(optptr+1)==':') ? optptr+2 : optptr+1; +} + +static int toggle_option(const char *optptr, int option) +{ + switch (*option_value(optptr)) { + case '\0': + option=!option; + break; + case '-': + option=FALSE; + break; + case '+': + option=TRUE; + break; + default: + about(); + } /* switch */ + return option; +} + +/* Parsing command line options is indirectly recursive: parseoptions() + * calls parserespf() to handle options in a a response file and + * parserespf() calls parseoptions() at its turn after having created + * an "option list" from the contents of the file. + */ +static void parserespf(char *filename,char *oname,char *ename,char *pname, + char *rname, char *codepage); + +static void parseoptions(int argc,char **argv,char *oname,char *ename,char *pname, + char *rname, char *codepage) +{ + char str[_MAX_PATH],*name; + const char *ptr; + int arg,i,isoption; + + for (arg=1; arg 2 + sc_compress=toggle_option(ptr,sc_compress); + #else + about(); + #endif + break; + case 'c': + strncpy(codepage,option_value(ptr),MAXCODEPAGE); /* set name of codepage */ + codepage[MAXCODEPAGE]='\0'; + break; +#if defined dos_setdrive + case 'D': /* set active directory */ + ptr=option_value(ptr); + if (ptr[1]==':') + dos_setdrive(toupper(*ptr)-'A'+1); /* set active drive */ + chdir(ptr); + break; +#endif + case 'd': + switch (*option_value(ptr)) { + case '0': + sc_debug=0; + break; + case '1': + sc_debug=sCHKBOUNDS; /* assertions and bounds checking */ + break; + case '2': + sc_debug=sCHKBOUNDS | sSYMBOLIC; /* also symbolic info */ + break; + case '3': + sc_debug=sCHKBOUNDS | sSYMBOLIC | sNOOPTIMIZE; + /* also avoid peephole optimization */ + break; + default: + about(); + } /* switch */ + break; + case 'e': + strncpy(ename,option_value(ptr),_MAX_PATH); /* set name of error file */ + ename[_MAX_PATH-1]='\0'; + break; +#if defined __WIN32__ || defined _WIN32 || defined _Windows + case 'H': + hwndFinish=(HWND)atoi(option_value(ptr)); + if (!IsWindow(hwndFinish)) + hwndFinish=(HWND)0; + break; +#endif + case 'h': + sc_showincludes = 1; + break; + case 'i': + strncpy(str,option_value(ptr),sizeof str); /* set name of include directory */ + str[sizeof(str)-1]='\0'; + i=strlen(str); + if (i>0) { + if (str[i-1]!=DIRSEP_CHAR) { + str[i]=DIRSEP_CHAR; + str[i+1]='\0'; + } /* if */ + insert_path(str); + } /* if */ + break; + case 'l': + if (*(ptr+1)!='\0') + about(); + sc_listing=TRUE; /* skip second pass & code generation */ + break; + case 'o': + strncpy(oname,option_value(ptr),_MAX_PATH); /* set name of (binary) output file */ + oname[_MAX_PATH-1]='\0'; + break; + case 'p': + strncpy(pname,option_value(ptr),_MAX_PATH); /* set name of implicit include file */ + pname[_MAX_PATH-1]='\0'; + break; +#if !defined SC_LIGHT + case 'r': + strncpy(rname,option_value(ptr),_MAX_PATH); /* set name of report file */ + rname[_MAX_PATH-1]='\0'; + sc_makereport=TRUE; + if (strlen(rname)>0) { + set_extension(rname,".xml",FALSE); + } else if ((name=get_sourcefile(0))!=NULL) { + assert(strlen(rname)==0); + assert(strlen(name)<_MAX_PATH); + if ((ptr=strrchr(name,DIRSEP_CHAR))!=NULL) + ptr++; /* strip path */ + else + ptr=name; + assert(strlen(ptr)<_MAX_PATH); + strcpy(rname,ptr); + set_extension(rname,".xml",TRUE); + } /* if */ + break; +#endif + case 'S': + i=atoi(option_value(ptr)); + if (i>64) + sc_stksize=(cell)i; /* stack size has minimum size */ + else + about(); + break; + case 's': + skipinput=atoi(option_value(ptr)); + break; + case 't': + sc_tabsize=atoi(option_value(ptr)); + break; + case 'v': + verbosity= isdigit(*option_value(ptr)) ? atoi(option_value(ptr)) : 2; + break; + case 'w': + i=(int)strtol(option_value(ptr),(char **)&ptr,10); + if (*ptr=='-') + pc_enablewarning(i,0); + else if (*ptr=='+') + pc_enablewarning(i,1); + else if (*ptr=='\0') + pc_enablewarning(i,2); + break; + case 'X': + i=atoi(option_value(ptr)); + if (i>64) + sc_amxlimit=(cell)i; /* abstract machine size has minimum size */ + else + about(); + break; + case '\\': /* use \ instead for escape characters */ + sc_ctrlchar='\\'; + break; + case '^': /* use ^ instead for escape characters */ + sc_ctrlchar='^'; + break; + case ';': + sc_needsemicolon=toggle_option(ptr,sc_needsemicolon); + break; + case '(': + optproccall=!toggle_option(ptr,!optproccall); + break; + default: /* wrong option */ + about(); + } /* switch */ + } else if (argv[arg][0]=='@') { + #if !defined SC_LIGHT + parserespf(&argv[arg][1],oname,ename,pname,rname,codepage); + #endif + } else if ((ptr=strchr(argv[arg],'='))!=NULL) { + i=(int)(ptr-argv[arg]); + if (i>sNAMEMAX) { + i=sNAMEMAX; + error(200,argv[arg],sNAMEMAX); /* symbol too long, truncated to sNAMEMAX chars */ + } /* if */ + strncpy(str,argv[arg],i); + str[i]='\0'; /* str holds symbol name */ + i=atoi(ptr+1); + add_constant(str,i,sGLOBAL,0); + } else { + strncpy(str,argv[arg],sizeof(str)-5); /* -5 because default extension is 4 characters */ + str[sizeof(str)-5]='\0'; + set_extension(str,".p",FALSE); + insert_sourcefile(str); + /* The output name is the first input name with a different extension, + * but it is stored in a different directory + */ + if (strlen(oname)==0) { + if ((ptr=strrchr(str,DIRSEP_CHAR))!=NULL) + ptr++; /* strip path */ + else + ptr=str; + assert(strlen(ptr)<_MAX_PATH); + strcpy(oname,ptr); + } /* if */ + set_extension(oname,".asm",TRUE); +#if !defined SC_LIGHT + if (sc_makereport && strlen(rname)==0) { + if ((ptr=strrchr(str,DIRSEP_CHAR))!=NULL) + ptr++; /* strip path */ + else + ptr=str; + assert(strlen(ptr)<_MAX_PATH); + strcpy(rname,ptr); + set_extension(rname,".xml",TRUE); + } /* if */ +#endif + } /* if */ + } /* for */ +} + +#if !defined SC_LIGHT +static void parserespf(char *filename,char *oname,char *ename,char *pname, + char *rname,char *codepage) +{ +#define MAX_OPTIONS 100 + FILE *fp; + char *string, *ptr, **argv; + int argc; + long size; + + if ((fp=fopen(filename,"r"))==NULL) + error(100,filename); /* error reading input file */ + /* load the complete file into memory */ + fseek(fp,0L,SEEK_END); + size=ftell(fp); + fseek(fp,0L,SEEK_SET); + assert(size [filename...] [options]\n\n"); + pc_printf("Options:\n"); + pc_printf(" -A alignment in bytes of the data segment and the stack\n"); + pc_printf(" -a output assembler code\n"); +#if AMX_COMPACTMARGIN > 2 + pc_printf(" -C[+/-] compact encoding for output file (default=%c)\n", sc_compress ? '+' : '-'); +#endif + pc_printf(" -c codepage name or number; e.g. 1252 for Windows Latin-1\n"); +#if defined dos_setdrive + pc_printf(" -Dpath active directory path\n"); +#endif + pc_printf(" -d0 no symbolic information, no run-time checks\n"); + pc_printf(" -d1 [default] run-time checks, no symbolic information\n"); + pc_printf(" -d2 full debug information and dynamic checking\n"); + pc_printf(" -d3 full debug information, dynamic checking, no optimization\n"); + pc_printf(" -e set name of error file (quiet compile)\n"); +#if defined __WIN32__ || defined _WIN32 || defined _Windows + pc_printf(" -H window handle to send a notification message on finish\n"); +#endif + pc_printf(" -i path for include files\n"); + pc_printf(" -l create list file (preprocess only)\n"); + pc_printf(" -o set base name of (P-code) output file\n"); + pc_printf(" -p set name of \"prefix\" file\n"); +#if !defined SC_LIGHT + pc_printf(" -r[name] write cross reference report to console or to specified file\n"); +#endif + pc_printf(" -S stack/heap size in cells (default=%d)\n",(int)sc_stksize); + pc_printf(" -s skip lines from the input file\n"); + pc_printf(" -t TAB indent size (in character positions, default=%d)\n",sc_tabsize); + pc_printf(" -v verbosity level; 0=quiet, 1=normal, 2=verbose (default=%d)\n",verbosity); + pc_printf(" -w disable a specific warning by its number\n"); + pc_printf(" -X abstract machine size limit in bytes\n"); + pc_printf(" -\\ use '\\' for escape characters\n"); + pc_printf(" -^ use '^' for escape characters\n"); + pc_printf(" -;[+/-] require a semicolon to end each statement (default=%c)\n", sc_needsemicolon ? '+' : '-'); + pc_printf(" -([+/-] require parantheses for function invocation (default=%c)\n", optproccall ? '-' : '+'); + pc_printf(" sym=val define constant \"sym\" with value \"val\"\n"); + pc_printf(" sym= define constant \"sym\" with value 0\n"); +#if defined __WIN32__ || defined _WIN32 || defined _Windows || defined __MSDOS__ + pc_printf("\nOptions may start with a dash or a slash; the options \"-d0\" and \"/d0\" are\n"); + pc_printf("equivalent.\n"); +#endif + pc_printf("\nOptions with a value may optionally separate the value from the option letter\n"); + pc_printf("with a colon (\":\") or an equal sign (\"=\"). That is, the options \"-d0\", \"-d=0\"\n"); + pc_printf("and \"-d:0\" are all equivalent.\n"); + } /* if */ + longjmp(errbuf,3); /* user abort */ +} + +static void setconstants(void) +{ + int debug; + + assert(sc_status==statIDLE); + append_constval(&tagname_tab,"_",0,0);/* "untagged" */ + append_constval(&tagname_tab,"bool",1,0); + + add_constant("true",1,sGLOBAL,1); /* boolean flags */ + add_constant("false",0,sGLOBAL,1); + add_constant("EOS",0,sGLOBAL,0); /* End Of String, or '\0' */ + #if PAWN_CELL_SIZE==16 + add_constant("cellbits",16,sGLOBAL,0); + #if defined _I16_MAX + add_constant("cellmax",_I16_MAX,sGLOBAL,0); + add_constant("cellmin",_I16_MIN,sGLOBAL,0); + #else + add_constant("cellmax",SHRT_MAX,sGLOBAL,0); + add_constant("cellmin",SHRT_MIN,sGLOBAL,0); + #endif + #elif PAWN_CELL_SIZE==32 + add_constant("cellbits",32,sGLOBAL,0); + #if defined _I32_MAX + add_constant("cellmax",_I32_MAX,sGLOBAL,0); + add_constant("cellmin",_I32_MIN,sGLOBAL,0); + #else + add_constant("cellmax",LONG_MAX,sGLOBAL,0); + add_constant("cellmin",LONG_MIN,sGLOBAL,0); + #endif + #elif PAWN_CELL_SIZE==64 + add_constant("cellbits",64,sGLOBAL,0); + add_constant("cellmax",_I64_MAX,sGLOBAL,0); + add_constant("cellmin",_I64_MIN,sGLOBAL,0); + #else + #error Unsupported cell size + #endif + add_constant("charbits",sCHARBITS,sGLOBAL,0); + add_constant("charmin",0,sGLOBAL,0); + add_constant("charmax",~(-1 << sCHARBITS) - 1,sGLOBAL,0); + add_constant("ucharmax",(1 << (sizeof(cell)-1)*8)-1,sGLOBAL,0); + + add_constant("__Pawn",VERSION_INT,sGLOBAL,0); + + pc_anytag=pc_addtag("any"); + + debug=0; + if ((sc_debug & (sCHKBOUNDS | sSYMBOLIC))==(sCHKBOUNDS | sSYMBOLIC)) + debug=2; + else if ((sc_debug & sCHKBOUNDS)==sCHKBOUNDS) + debug=1; + add_constant("debug",debug,sGLOBAL,0); + + append_constval(&sc_automaton_tab,"",0,0); /* anonymous automaton */ +} + +static int getclassspec(int initialtok,int *fpublic,int *fstatic,int *fstock,int *fconst) +{ + int tok,err; + cell val; + char *str; + + assert(fconst!=NULL); + assert(fstock!=NULL); + assert(fstatic!=NULL); + assert(fpublic!=NULL); + *fconst=FALSE; + *fstock=FALSE; + *fstatic=FALSE; + *fpublic=FALSE; + switch (initialtok) { + case tCONST: + *fconst=TRUE; + break; + case tSTOCK: + *fstock=TRUE; + break; + case tSTATIC: + *fstatic=TRUE; + break; + case tPUBLIC: + *fpublic=TRUE; + break; + } /* switch */ + + err=0; + do { + tok=lex(&val,&str); /* read in (new) token */ + switch (tok) { + case tCONST: + if (*fconst) + err=42; /* invalid combination of class specifiers */ + *fconst=TRUE; + break; + case tSTOCK: + if (*fstock) + err=42; /* invalid combination of class specifiers */ + *fstock=TRUE; + break; + case tSTATIC: + if (*fstatic) + err=42; /* invalid combination of class specifiers */ + *fstatic=TRUE; + break; + case tPUBLIC: + if (*fpublic) + err=42; /* invalid combination of class specifiers */ + *fpublic=TRUE; + break; + default: + lexpush(); + tok=0; /* force break out of loop */ + } /* switch */ + } while (tok && err==0); + + /* extra checks */ + if (*fstatic && *fpublic) { + err=42; /* invalid combination of class specifiers */ + *fstatic=*fpublic=FALSE; + } /* if */ + + if (err) + error(err); + return err==0; +} + +/* parse - process all input text + * + * At this level, only static declarations and function definitions are legal. + */ +static void parse(void) +{ + int tok,fconst,fstock,fstatic,fpublic; + cell val; + char *str; + + while (freading){ + /* first try whether a declaration possibly is native or public */ + tok=lex(&val,&str); /* read in (new) token */ + switch (tok) { + case 0: + /* ignore zero's */ + break; + case tNEW: + if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) + declglb(NULL,0,fpublic,fstatic,fstock,fconst); + break; + case tSTATIC: + /* This can be a static function or a static global variable; we know + * which of the two as soon as we have parsed up to the point where an + * opening paranthesis of a function would be expected. To back out after + * deciding it was a declaration of a static variable after all, we have + * to store the symbol name and tag. + */ + if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) { + assert(!fpublic); + declfuncvar(fpublic,fstatic,fstock,fconst); + } /* if */ + break; + case tCONST: + decl_const(sGLOBAL); + break; + case tENUM: + decl_enum(sGLOBAL); + break; + case tPUBLIC: + /* This can be a public function or a public variable; see the comment + * above (for static functions/variables) for details. + */ + if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) { + assert(!fstatic); + declfuncvar(fpublic,fstatic,fstock,fconst); + } /* if */ + break; + case tSTOCK: + /* This can be a stock function or a stock *global*) variable; see the + * comment above (for static functions/variables) for details. + */ + if (getclassspec(tok,&fpublic,&fstatic,&fstock,&fconst)) { + assert(fstock); + declfuncvar(fpublic,fstatic,fstock,fconst); + } /* if */ + break; + case tLABEL: + case tSYMBOL: + case tOPERATOR: + lexpush(); + if (!newfunc(NULL,-1,FALSE,FALSE,FALSE)) { + error(10); /* illegal function or declaration */ + lexclr(TRUE); /* drop the rest of the line */ + litidx=0; /* drop the literal queue too */ + } /* if */ + break; + case tNATIVE: + funcstub(TRUE); /* create a dummy function */ + break; + case tFORWARD: + funcstub(FALSE); + break; + case '}': + error(54); /* unmatched closing brace */ + break; + case '{': + error(55); /* start of function body without function header */ + break; + default: + if (freading) { + error(10); /* illegal function or declaration */ + lexclr(TRUE); /* drop the rest of the line */ + litidx=0; /* drop any literal arrays (strings) */ + } /* if */ + } /* switch */ + } /* while */ +} + +/* dumplits + * + * Dump the literal pool (strings etc.) + * + * Global references: litidx (referred to only) + */ +static void dumplits(void) +{ + int j,k; + + k=0; + while (k=litidx) + stgwrite("\n"); /* force a newline after 10 dumps */ + /* Note: stgwrite() buffers a line until it is complete. It recognizes + * the end of line as a sequence of "\n\0", so something like "\n\t" + * so should not be passed to stgwrite(). + */ + } /* while */ + } /* while */ +} + +/* dumpzero + * + * Dump zero's for default initial values + */ +static void dumpzero(int count) +{ + int i; + + if (count<=0) + return; + assert(curseg==2); + defstorage(); + i=0; + while (count-- > 0) { + outval(0, FALSE); + i=(i+1) % 16; + stgwrite((i==0 || count==0) ? "\n" : " "); + if (i==0 && count>0) + defstorage(); + } /* while */ +} + +static void aligndata(int numbytes) +{ + assert(numbytes % sizeof(cell) == 0); /* alignment must be a multiple of + * the cell size */ + assert(numbytes!=0); + + if ((((glb_declared+litidx)*sizeof(cell)) % numbytes)!=0) { + while ((((glb_declared+litidx)*sizeof(cell)) % numbytes)!=0) + litadd(0); + } /* if */ + +} + +#if !defined SC_LIGHT +/* sc_attachdocumentation() + * appends documentation comments to the passed-in symbol, or to a global + * string if "sym" is NULL. + */ +void sc_attachdocumentation(symbol *sym) +{ + int line; + size_t length; + char *str,*doc; + + if (!sc_makereport || sc_status!=statFIRST || sc_parsenum>0) { + /* just clear the entire table */ + delete_docstringtable(); + return; + } /* if */ + /* in the case of state functions, multiple documentation sections may + * appear; we should concatenate these + */ + assert(sym==NULL || sym->documentation==NULL || sym->states!=NULL); + + /* first check the size */ + length=0; + for (line=0; (str=get_docstring(line))!=NULL && *str!=sDOCSEP; line++) { + if (length>0) + length++; /* count 1 extra for a separating space */ + length+=strlen(str); + } /* for */ + if (sym==NULL && sc_documentation!=NULL) { + length += strlen(sc_documentation) + 1 + 4; /* plus 4 for "

" */ + assert(length>strlen(sc_documentation)); + } /* if */ + + if (length>0) { + /* allocate memory for the documentation */ + if (sym!=NULL && sym->documentation!=NULL) + length+=strlen(sym->documentation) + 1 + 4;/* plus 4 for "

" */ + doc=(char*)malloc((length+1)*sizeof(char)); + if (doc!=NULL) { + /* initialize string or concatenate */ + if (sym==NULL && sc_documentation!=NULL) { + strcpy(doc,sc_documentation); + strcat(doc,"

"); + } else if (sym!=NULL && sym->documentation!=NULL) { + strcpy(doc,sym->documentation); + strcat(doc,"

"); + free(sym->documentation); + sym->documentation=NULL; + } else { + doc[0]='\0'; + } /* if */ + /* collect all documentation */ + while ((str=get_docstring(0))!=NULL && *str!=sDOCSEP) { + if (doc[0]!='\0') + strcat(doc," "); + strcat(doc,str); + delete_docstring(0); + } /* while */ + if (str!=NULL) { + /* also delete the separator */ + assert(*str==sDOCSEP); + delete_docstring(0); + } /* if */ + if (sym!=NULL) { + assert(sym->documentation==NULL); + sym->documentation=doc; + } else { + if (sc_documentation!=NULL) + free(sc_documentation); + sc_documentation=doc; + } /* if */ + } /* if */ + } else { + /* delete an empty separator, if present */ + if ((str=get_docstring(0))!=NULL && *str==sDOCSEP) + delete_docstring(0); + } /* if */ +} + +static void insert_docstring_separator(void) +{ + char sep[2]={sDOCSEP,'\0'}; + insert_docstring(sep); +} +#else + #define sc_attachdocumentation(s) (void)(s) + #define insert_docstring_separator() +#endif + +static void declfuncvar(int fpublic,int fstatic,int fstock,int fconst) +{ + char name[sNAMEMAX+11]; + int tok,tag; + char *str; + cell val; + int invalidfunc; + + tag=pc_addtag(NULL); + tok=lex(&val,&str); + /* if we arrived here, this may not be a declaration of a native function + * or variable + */ + if (tok==tNATIVE) { + error(42); /* invalid combination of class specifiers */ + return; + } /* if */ + + if (tok!=tSYMBOL && tok!=tOPERATOR) { + lexpush(); + needtoken(tSYMBOL); + lexclr(TRUE); /* drop the rest of the line */ + litidx=0; /* drop the literal queue too */ + return; + } /* if */ + if (tok==tOPERATOR) { + lexpush(); /* push "operator" keyword back (for later analysis) */ + if (!newfunc(NULL,tag,fpublic,fstatic,fstock)) { + error(10); /* illegal function or declaration */ + lexclr(TRUE); /* drop the rest of the line */ + litidx=0; /* drop the literal queue too */ + } /* if */ + } else { + /* so tok is tSYMBOL */ + assert(strlen(str)<=sNAMEMAX); + strcpy(name,str); + /* only variables can be "const" or both "public" and "stock" */ + invalidfunc= fconst || (fpublic && fstock); + if (invalidfunc || !newfunc(name,tag,fpublic,fstatic,fstock)) { + /* if not a function, try a global variable */ + declglb(name,tag,fpublic,fstatic,fstock,fconst); + } /* if */ + } /* if */ +} + +/* declglb - declare global symbols + * + * Declare a static (global) variable. Global variables are stored in + * the DATA segment. + * + * global references: glb_declared (altered) + */ +static void declglb(char *firstname,int firsttag,int fpublic,int fstatic,int fstock,int fconst) +{ + int ident,tag,ispublic; + int idxtag[sDIMEN_MAX]; + char name[sNAMEMAX+1]; + cell val,size,cidx; + char *str; + int dim[sDIMEN_MAX]; + int numdim; + short filenum; + symbol *sym; + constvalue *enumroot; + #if !defined NDEBUG + cell glbdecl=0; + #endif + + assert(!fpublic || !fstatic); /* may not both be set */ + insert_docstring_separator(); /* see comment in newfunc() */ + filenum=fcurrent; /* save file number at the start of the declaration */ + do { + size=1; /* single size (no array) */ + numdim=0; /* no dimensions */ + ident=iVARIABLE; + if (firstname!=NULL) { + assert(strlen(firstname)<=sNAMEMAX); + strcpy(name,firstname); /* save symbol name */ + tag=firsttag; + firstname=NULL; + } else { + tag=pc_addtag(NULL); + if (lex(&val,&str)!=tSYMBOL) /* read in (new) token */ + error(20,str); /* invalid symbol name */ + assert(strlen(str)<=sNAMEMAX); + strcpy(name,str); /* save symbol name */ + } /* if */ + sym=findglb(name); + if (sym==NULL) + sym=findconst(name); + if (sym!=NULL && (sym->usage & uDEFINE)!=0) + error(21,name); /* symbol already defined */ + ispublic=fpublic; + if (name[0]==PUBLIC_CHAR) { + ispublic=TRUE; /* implicitly public variable */ + assert(!fstatic); + } /* if */ + while (matchtoken('[')) { + ident=iARRAY; + if (numdim == sDIMEN_MAX) { + error(53); /* exceeding maximum number of dimensions */ + return; + } /* if */ + size=needsub(&idxtag[numdim],&enumroot); /* get size; size==0 for "var[]" */ + #if INT_MAX < LONG_MAX + if (size > INT_MAX) + error(105); /* overflow, exceeding capacity */ + #endif + if (ispublic) + error(56,name); /* arrays cannot be public */ + dim[numdim++]=(int)size; + } /* while */ + /* if this variable is never used (which can be detected only in the + * second stage), shut off code generation + */ + cidx=0; /* only to avoid a compiler warning */ + if (sc_status==statWRITE && sym!=NULL && (sym->usage & (uREAD | uWRITTEN))==0) { + sc_status=statSKIP; + cidx=code_idx; + #if !defined NDEBUG + glbdecl=glb_declared; + #endif + } /* if */ + begdseg(); /* real (initialized) data in data segment */ + assert(litidx==0); /* literal queue should be empty */ + if (sc_alignnext) { + litidx=0; + aligndata(sc_dataalign); + dumplits(); /* dump the literal queue */ + sc_alignnext=FALSE; + litidx=0; /* global initial data is dumped, so restart at zero */ + } /* if */ + assert(litidx==0); /* literal queue should be empty (again) */ + initials(ident,tag,&size,dim,numdim,enumroot);/* stores values in the literal queue */ + assert(size>=litidx); + if (numdim==1) + dim[0]=(int)size; + dumplits(); /* dump the literal queue */ + dumpzero((int)size-litidx); + litidx=0; + if (sym==NULL) { /* define only if not yet defined */ + sym=addvariable(name,sizeof(cell)*glb_declared,ident,sGLOBAL,tag, + dim,numdim,idxtag); + } else { /* if declared but not yet defined, adjust the variable's address */ + sym->addr=sizeof(cell)*glb_declared; + sym->codeaddr=code_idx; + sym->usage|=uDEFINE; + } /* if */ + if (ispublic) + sym->usage|=uPUBLIC; + if (fconst) + sym->usage|=uCONST; + if (fstock) + sym->usage|=uSTOCK; + if (fstatic) + sym->fnumber=filenum; + sc_attachdocumentation(sym);/* attach any documenation to the variable */ + if (sc_status==statSKIP) { + sc_status=statWRITE; + code_idx=cidx; + assert(glb_declared==glbdecl); + } else { + glb_declared+=(int)size; /* add total number of cells */ + } /* if */ + } while (matchtoken(',')); /* enddo */ /* more? */ + needtoken(tTERM); /* if not comma, must be semicolumn */ +} + +/* declloc - declare local symbols + * + * Declare local (automatic) variables. Since these variables are relative + * to the STACK, there is no switch to the DATA segment. These variables + * cannot be initialized either. + * + * global references: declared (altered) + * funcstatus (referred to only) + */ +static int declloc(int fstatic) +{ + int ident,tag; + int idxtag[sDIMEN_MAX]; + char name[sNAMEMAX+1]; + symbol *sym; + constvalue *enumroot; + cell val,size; + char *str; + value lval = {0}; + int cur_lit=0; + int dim[sDIMEN_MAX]; + int numdim; + int fconst; + int staging_start=0; + + fconst=matchtoken(tCONST); + do { + ident=iVARIABLE; + size=1; + numdim=0; /* no dimensions */ + tag=pc_addtag(NULL); + if (lex(&val,&str)!=tSYMBOL) /* read in (new) token */ + error(20,str); /* invalid symbol name */ + assert(strlen(str)<=sNAMEMAX); + strcpy(name,str); /* save symbol name */ + if (name[0]==PUBLIC_CHAR) + error(56,name); /* local variables cannot be public */ + /* Note: block locals may be named identical to locals at higher + * compound blocks (as with standard C); so we must check (and add) + * the "nesting level" of local variables to verify the + * multi-definition of symbols. + */ + if ((sym=findloc(name))!=NULL && sym->compound==nestlevel) + error(21,name); /* symbol already defined */ + /* Although valid, a local variable whose name is equal to that + * of a global variable or to that of a local variable at a lower + * level might indicate a bug. + * NOTE - don't bother with the error if there's no valid function! + */ + if (((sym=findloc(name))!=NULL && sym->compound!=nestlevel) || findglb(name)!=NULL) + if (curfunc!=NULL && (curfunc->usage & uNATIVE)) + error(219,name); /* variable shadows another symbol */ + while (matchtoken('[')){ + ident=iARRAY; + if (numdim == sDIMEN_MAX) { + error(53); /* exceeding maximum number of dimensions */ + return ident; + } /* if */ + size=needsub(&idxtag[numdim],&enumroot); /* get size; size==0 for "var[]" */ + #if INT_MAX < LONG_MAX + if (size > INT_MAX) + error(105); /* overflow, exceeding capacity */ + #endif + dim[numdim++]=(int)size; + } /* while */ + if (ident==iARRAY || fstatic) { + if (sc_alignnext) { + aligndata(sc_dataalign); + sc_alignnext=FALSE; + } /* if */ + cur_lit=litidx; /* save current index in the literal table */ + initials(ident,tag,&size,dim,numdim,enumroot); + if (size==0) + return ident; /* error message already given */ + if (numdim==1) + dim[0]=(int)size; + } /* if */ + /* reserve memory (on the stack) for the variable */ + if (fstatic) { + /* write zeros for uninitialized fields */ + while (litidxusage & uNATIVE)==0); + if (curfunc->x.stacksizex.stacksize=declared+1; /* +1 for PROC opcode */ + } /* if */ + /* now that we have reserved memory for the variable, we can proceed + * to initialize it */ + assert(sym!=NULL); /* we declared it, it must be there */ + sym->compound=nestlevel; /* for multiple declaration/shadowing check */ + if (fconst) + sym->usage|=uCONST; + if (!fstatic) { /* static variables already initialized */ + if (ident==iVARIABLE) { + /* simple variable, also supports initialization */ + int ctag = tag; /* set to "tag" by default */ + int explicit_init=FALSE;/* is the variable explicitly initialized? */ + if (matchtoken('=')) { + doexpr(FALSE,FALSE,FALSE,FALSE,&ctag,NULL,TRUE); + explicit_init=TRUE; + } else { + ldconst(0,sPRI); /* uninitialized variable, set to zero */ + } /* if */ + /* now try to save the value (still in PRI) in the variable */ + lval.sym=sym; + lval.ident=iVARIABLE; + lval.constval=0; + lval.tag=tag; + check_userop(NULL,ctag,lval.tag,2,NULL,&ctag); + store(&lval); + markexpr(sEXPR,NULL,0); /* full expression ends after the store */ + assert(staging); /* end staging phase (optimize expression) */ + stgout(staging_start); + stgset(FALSE); + if (!matchtag(tag,ctag,TRUE)) + error(213); /* tag mismatch */ + /* if the variable was not explicitly initialized, reset the + * "uWRITTEN" flag that store() set */ + if (!explicit_init) + sym->usage &= ~uWRITTEN; + } else { + /* an array */ + assert(cur_lit>=0 && cur_lit<=litidx && litidx<=litmax); + /* if the array is not completely filled, set all values to zero first */ + assert(size>0 && size>=sym->dim.array.length); + assert(numdim>1 || size==sym->dim.array.length); + if (litidx-cur_lit < size) + fillarray(sym,size*sizeof(cell),0); + if (cur_lit=0 && cur<=numdim); + if (cur==numdim) + return 0; + return dim[cur]+(dim[cur]*calc_arraysize(dim,numdim,cur+1)); +} + +static cell adjust_indirectiontables(int dim[],int numdim,int cur,cell increment, + int startlit,constvalue *lastdim,int *skipdim) +{ +static int base; + int d; + cell accum; + + assert(cur>=0 && cur=0); + assert(cur>0 && startlit==-1 || startlit>=0 && startlit<=litidx); + if (cur==0) + base=startlit; + if (cur==numdim-1) + return 0; + /* 2 or more dimensions left, fill in an indirection vector */ + assert(dim[cur]>0); + if (dim[cur+1]>0) { + for (d=0; dnext; d<*skipdim; d++,ld=ld->next) { + assert(ld!=NULL); + } /* for */ + for (d=0; dname,NULL,16)==d); + litq[base++]=(dim[cur]+accum+increment) * sizeof(cell); + accum+=ld->value-1; + *skipdim+=1; + ld=ld->next; + } /* for */ + } /* if */ + /* create the indirection tables for the lower level */ + if (cur+2=dim[cur]) { + error(18); /* initialization data exceeds array size */ + break; + } /* if */ + if (cur+20) { + if (idxcounteddim[cur]) + error(18); /* initialization data exceeds declared size */ + } /* if */ + counteddim[cur]=idx; + + return totalsize+dim[cur]; /* size of sub-arrays + indirection vector */ +} + +/* initvector + * Initialize a single dimensional array + */ +static cell initvector(int ident,int tag,cell size,int fillzero, + constvalue *enumroot,int *errorfound) +{ + cell prev1=0,prev2=0; + int ellips=FALSE; + int curlit=litidx; + int rtag,ctag; + + assert(ident==iARRAY || ident==iREFARRAY); + if (matchtoken('{')) { + constvalue *enumfield=(enumroot!=NULL) ? enumroot->next : NULL; + do { + int fieldlit=litidx; + int matchbrace,i; + if (matchtoken('}')) { /* to allow for trailing ',' after the initialization */ + lexpush(); + break; + } /* if */ + if ((ellips=matchtoken(tELLIPS))!=0) + break; + /* for enumeration fields, allow another level of braces ("{...}") */ + matchbrace=0; /* preset */ + ellips=0; + if (enumfield!=NULL) + matchbrace=matchtoken('{'); + for ( ;; ) { + prev2=prev1; + prev1=init(ident,&ctag,errorfound); + if (!matchbrace) + break; + if ((ellips=matchtoken(tELLIPS))!=0) + break; + if (!matchtoken(',')) { + needtoken('}'); + break; + } /* for */ + } /* for */ + /* if this array is based on an enumeration, fill the "field" up with + * zeros, and toggle the tag + */ + if (enumroot!=NULL && enumfield==NULL) + error(227); /* more initiallers than enum fields */ + rtag=tag; /* preset, may be overridden by enum field tag */ + if (enumfield!=NULL) { + cell step; + symbol *symfield=findconst(enumfield->name); + assert(symfield!=NULL); + assert(fieldlitsymfield->dim.array.length) + error(228); /* length of initialler exceeds size of the enum field */ + if (ellips) { + step=prev1-prev2; + } else { + step=0; + prev1=0; + } /* if */ + for (i=litidx-fieldlit; idim.array.length; i++) { + prev1+=step; + litadd(prev1); + } /* for */ + rtag=symfield->x.idxtag; /* set the expected tag to the index tag */ + enumfield=enumfield->next; + } /* if */ + if (!matchtag(rtag,ctag,TRUE)) + error(213); /* tag mismatch */ + } while (matchtoken(',')); /* do */ + needtoken('}'); + } else { + init(ident,&ctag,errorfound); + if (!matchtag(tag,ctag,TRUE)) + error(213); /* tagname mismatch */ + } /* if */ + /* fill up the literal queue with a series */ + if (ellips) { + cell step=((litidx-curlit)==1) ? (cell)0 : prev1-prev2; + if (size==0 || (litidx-curlit)==0) + error(41); /* invalid ellipsis, array size unknown */ + else if ((litidx-curlit)==(int)size) + error(18); /* initialisation data exceeds declared size */ + while ((litidx-curlit)<(int)size) { + prev1+=step; + litadd(prev1); + } /* while */ + } /* if */ + if (fillzero && size>0) { + while ((litidx-curlit)<(int)size) + litadd(0); + } /* if */ + if (size==0) { + size=litidx-curlit; /* number of elements defined */ + } else if (litidx-curlit>(int)size) { /* e.g. "myvar[3]={1,2,3,4};" */ + error(18); /* initialisation data exceeds declared size */ + litidx=(int)size+curlit; /* avoid overflow in memory moves */ + } /* if */ + return size; +} + +/* init + * + * Evaluate one initializer. + */ +static cell init(int ident,int *tag,int *errorfound) +{ + cell i = 0; + + if (matchtoken(tSTRING)){ + /* lex() automatically stores strings in the literal table (and + * increases "litidx") */ + if (ident==iVARIABLE) { + error(6); /* must be assigned to an array */ + litidx=1; /* reset literal queue */ + } /* if */ + *tag=0; + } else if (constexpr(&i,tag,NULL)){ + litadd(i); /* store expression result in literal table */ + } else { + if (errorfound!=NULL) + *errorfound=TRUE; + } /* if */ + return i; +} + +/* needsub + * + * Get required array size + */ +static cell needsub(int *tag,constvalue **enumroot) +{ + cell val; + symbol *sym; + + assert(tag!=NULL); + *tag=0; + if (enumroot!=NULL) + *enumroot=NULL; /* preset */ + if (matchtoken(']')) /* we have already seen "[" */ + return 0; /* zero size (like "char msg[]") */ + + constexpr(&val,tag,&sym); /* get value (must be constant expression) */ + if (val<0) { + error(9); /* negative array size is invalid; assumed zero */ + val=0; + } /* if */ + needtoken(']'); + + if (enumroot!=NULL) { + /* get the field list for an enumeration */ + assert(*enumroot==NULL);/* should have been preset */ + assert(sym==NULL || sym->ident==iCONSTEXPR); + if (sym!=NULL && (sym->usage & uENUMROOT)==uENUMROOT) { + assert(sym->dim.enumlist!=NULL); + *enumroot=sym->dim.enumlist; + } /* if */ + } /* if */ + + return val; /* return array size */ +} + +/* decl_const - declare a single constant + * + */ +static void decl_const(int vclass) +{ + char constname[sNAMEMAX+1]; + cell val; + char *str; + int tag,exprtag; + int symbolline; + symbol *sym; + + insert_docstring_separator(); /* see comment in newfunc() */ + tag=pc_addtag(NULL); + if (lex(&val,&str)!=tSYMBOL) /* read in (new) token */ + error(20,str); /* invalid symbol name */ + symbolline=fline; /* save line where symbol was found */ + strcpy(constname,str); /* save symbol name */ + needtoken('='); + constexpr(&val,&exprtag,NULL);/* get value */ + needtoken(tTERM); + /* add_constant() checks for duplicate definitions */ + if (!matchtag(tag,exprtag,FALSE)) { + /* temporarily reset the line number to where the symbol was defined */ + int orgfline=fline; + fline=symbolline; + error(213); /* tagname mismatch */ + fline=orgfline; + } /* if */ + sym=add_constant(constname,val,vclass,tag); + if (sym!=NULL) + sc_attachdocumentation(sym);/* attach any documenation to the function */ +} + +/* decl_enum - declare enumerated constants + * + */ +static void decl_enum(int vclass) +{ + char enumname[sNAMEMAX+1],constname[sNAMEMAX+1]; + cell val,value,size; + char *str; + int tok,tag,explicittag; + cell increment,multiplier; + constvalue *enumroot; + symbol *enumsym; + + /* get an explicit tag, if any (we need to remember whether an explicit + * tag was passed, even if that explicit tag was "_:", so we cannot call + * pc_addtag() here + */ + if (lex(&val,&str)==tLABEL) { + tag=pc_addtag(str); + explicittag=TRUE; + } else { + lexpush(); + tag=0; + explicittag=FALSE; + } /* if */ + + /* get optional enum name (also serves as a tag if no explicit tag was set) */ + if (lex(&val,&str)==tSYMBOL) { /* read in (new) token */ + strcpy(enumname,str); /* save enum name (last constant) */ + if (!explicittag) + tag=pc_addtag(enumname); + } else { + lexpush(); /* analyze again */ + enumname[0]='\0'; + } /* if */ + + /* get increment and multiplier */ + increment=1; + multiplier=1; + if (matchtoken('(')) { + if (matchtoken(taADD)) { + constexpr(&increment,NULL,NULL); + } else if (matchtoken(taMULT)) { + constexpr(&multiplier,NULL,NULL); + } else if (matchtoken(taSHL)) { + constexpr(&val,NULL,NULL); + while (val-->0) + multiplier*=2; + } /* if */ + needtoken(')'); + } /* if */ + + if (strlen(enumname)>0) { + /* already create the root symbol, so the fields can have it as their "parent" */ + enumsym=add_constant(enumname,0,vclass,tag); + if (enumsym!=NULL) + enumsym->usage |= uENUMROOT; + /* start a new list for the element names */ + if ((enumroot=(constvalue*)malloc(sizeof(constvalue)))==NULL) + error(103); /* insufficient memory (fatal error) */ + memset(enumroot,0,sizeof(constvalue)); + } else { + enumsym=NULL; + enumroot=NULL; + } /* if */ + + needtoken('{'); + /* go through all constants */ + value=0; /* default starting value */ + do { + int idxtag,fieldtag; + symbol *sym; + if (matchtoken('}')) { /* quick exit if '}' follows ',' */ + lexpush(); + break; + } /* if */ + idxtag=pc_addtag(NULL); /* optional explicit item tag */ + tok=lex(&val,&str); /* read in (new) token */ + if (tok!=tSYMBOL) + error(20,str); /* invalid symbol name */ + strcpy(constname,str); /* save symbol name */ + size=increment; /* default increment of 'val' */ + if (matchtoken('[')) { + constexpr(&size,&fieldtag,NULL); /* get size */ + needtoken(']'); + } /* if */ + if (matchtoken('=')) + constexpr(&value,NULL,NULL); /* get value */ + /* add_constant() checks whether a variable (global or local) or + * a constant with the same name already exists + */ + sym=add_constant(constname,value,vclass,tag); + if (sym==NULL) + continue; /* error message already given */ + /* set the item tag and the item size, for use in indexing arrays */ + sym->x.idxtag=idxtag; + sym->fieldtag=fieldtag; + sym->dim.array.length=size; + sym->dim.array.level=0; + sym->parent=enumsym; + /* add the constant to a separate list as well */ + if (enumroot!=NULL) { + sym->usage |= uENUMFIELD; + append_constval(enumroot,constname,value,0); + } /* if */ + if (multiplier==1) + value+=size; + else + value*=size*multiplier; + } while (matchtoken(',')); + needtoken('}'); /* terminates the constant list */ + matchtoken(';'); /* eat an optional ; */ + + /* set the enum name to the "next" value (typically the last value plus one) */ + if (enumsym!=NULL) { + assert((enumsym->usage & uENUMROOT)!=0); + enumsym->addr=value; + /* assign the constant list */ + assert(enumroot!=NULL); + enumsym->dim.enumlist=enumroot; + sc_attachdocumentation(enumsym); /* attach any documenation to the enumeration */ + } /* if */ +} + +static int getstates(const char *funcname) +{ + char fsaname[sNAMEMAX+1],statename[sNAMEMAX+1]; + cell val; + char *str; + constvalue *automaton; + constvalue *state; + int fsa,islabel; + int *list; + int count,listsize,state_id; + + if (!matchtoken('<')) + return 0; + if (matchtoken('>')) + return -1; /* special construct: all other states (fall-back) */ + + count=0; + listsize=0; + list=NULL; + fsa=-1; + + do { + if (!(islabel=matchtoken(tLABEL)) && !needtoken(tSYMBOL)) + break; + tokeninfo(&val,&str); + assert(strlen(str)=0 && automaton->index!=fsa) + error(83,funcname); /* multiple automatons for a single function */ + fsa=automaton->index; + } /* if */ + state=state_add(statename,fsa); + /* add this state to the state combination list (it will be attached to the + * automaton later) */ + state_buildlist(&list,&listsize,&count,(int)state->value); + } while (matchtoken(',')); + needtoken('>'); + + if (count>0) { + assert(automaton!=NULL); + assert(fsa>=0); + state_id=state_addlist(list,count,fsa); + assert(state_id>0); + } else { + /* error is already given */ + state_id=0; + } /* if */ + if (list!=NULL) + free(list); + + return state_id; +} + +static void attachstatelist(symbol *sym, int state_id) +{ + assert(sym!=NULL); + if ((sym->usage & uDEFINE)!=0 && (sym->states==NULL || state_id==0)) + error(21,sym->name); /* function already defined, either without states or the current definition has no states */ + + if (state_id!=0) { + /* add the state list id */ + constvalue *stateptr; + if (sym->states==NULL) { + if ((sym->states=(constvalue*)malloc(sizeof(constvalue)))==NULL) + error(103); /* insufficient memory (fatal error) */ + memset(sym->states,0,sizeof(constvalue)); + } /* if */ + /* see whether the id already exists (add new state only if it does not + * yet exist + */ + assert(sym->states!=NULL); + for (stateptr=sym->states->next; stateptr!=NULL && stateptr->index!=state_id; stateptr=stateptr->next) + /* nothing */; + assert(state_id<=SHRT_MAX); + if (stateptr==NULL) + append_constval(sym->states,"",code_idx,(short)state_id); + else if (stateptr->value==0) + stateptr->value=code_idx; + else + error(84,sym->name); + /* also check for another conflicting situation: a fallback function + * without any states + */ + if (state_id==-1 && sc_status!=statFIRST) { + /* in the second round, all states should have been accumulated */ + assert(sym->states!=NULL); + for (stateptr=sym->states->next; stateptr!=NULL && stateptr->index==-1; stateptr=stateptr->next) + /* nothing */; + if (stateptr==NULL) + error(85,sym->name); /* no states are defined for this function */ + } /* if */ + } /* if */ +} + +/* + * Finds a function in the global symbol table or creates a new entry. + * It does some basic processing and error checking. + */ +SC_FUNC symbol *fetchfunc(char *name,int tag) +{ + symbol *sym; + + if ((sym=findglb(name))!=0) { /* already in symbol table? */ + if (sym->ident!=iFUNCTN) { + error(21,name); /* yes, but not as a function */ + return NULL; /* make sure the old symbol is not damaged */ + } else if ((sym->usage & uNATIVE)!=0) { + error(21,name); /* yes, and it is a native */ + } /* if */ + assert(sym->vclass==sGLOBAL); + if ((sym->usage & uPROTOTYPED)!=0 && sym->tag!=tag) + error(25); /* mismatch from earlier prototype */ + if ((sym->usage & uDEFINE)==0) { + /* as long as the function stays undefined, update the address and the tag */ + if (sym->states==NULL) + sym->addr=code_idx; + sym->tag=tag; + } /* if */ + } else { + /* don't set the "uDEFINE" flag; it may be a prototype */ + sym=addsym(name,code_idx,iFUNCTN,sGLOBAL,tag,0); + assert(sym!=NULL); /* fatal error 103 must be given on error */ + /* assume no arguments */ + sym->dim.arglist=(arginfo*)malloc(1*sizeof(arginfo)); + sym->dim.arglist[0].ident=0; + /* set library ID to NULL (only for native functions) */ + sym->x.lib=NULL; + /* set the required stack size to zero (only for non-native functions) */ + sym->x.stacksize=1; /* 1 for PROC opcode */ + } /* if */ + + return sym; +} + +/* This routine adds symbolic information for each argument. + */ +static void define_args(void) +{ + symbol *sym; + + /* At this point, no local variables have been declared. All + * local symbols are function arguments. + */ + sym=loctab.next; + while (sym!=NULL) { + assert(sym->ident!=iLABEL); + assert(sym->vclass==sLOCAL); + markexpr(sLDECL,sym->name,sym->addr); /* mark for better optimization */ + sym=sym->next; + } /* while */ +} + +static int operatorname(char *name) +{ + int opertok; + char *str; + cell val; + + assert(name!=NULL); + + /* check the operator */ + opertok=lex(&val,&str); + switch (opertok) { + case '+': + case '-': + case '*': + case '/': + case '%': + case '>': + case '<': + case '!': + case '~': + case '=': + name[0]=(char)opertok; + name[1]='\0'; + break; + case tINC: + strcpy(name,"++"); + break; + case tDEC: + strcpy(name,"--"); + break; + case tlEQ: + strcpy(name,"=="); + break; + case tlNE: + strcpy(name,"!="); + break; + case tlLE: + strcpy(name,"<="); + break; + case tlGE: + strcpy(name,">="); + break; + default: + name[0]='\0'; + error(7); /* operator cannot be redefined (or bad operator name) */ + return 0; + } /* switch */ + + return opertok; +} + +static int operatoradjust(int opertok,symbol *sym,char *opername,int resulttag) +{ + int tags[2]={0,0}; + int count=0; + arginfo *arg; + char tmpname[sNAMEMAX+1]; + symbol *oldsym; + + if (opertok==0) + return TRUE; + + assert(sym!=NULL && sym->ident==iFUNCTN && sym->dim.arglist!=NULL); + /* count arguments and save (first two) tags */ + while (arg=&sym->dim.arglist[count], arg->ident!=0) { + if (count<2) { + if (arg->numtags>1) + error(65,count+1); /* function argument may only have a single tag */ + else if (arg->numtags==1) + tags[count]=arg->tags[0]; + } /* if */ + if (opertok=='~' && count==0) { + if (arg->ident!=iREFARRAY) + error(73,arg->name);/* must be an array argument */ + } else { + if (arg->ident!=iVARIABLE) + error(66,arg->name);/* must be non-reference argument */ + } /* if */ + if (arg->hasdefault) + error(59,arg->name); /* arguments of an operator may not have a default value */ + count++; + } /* while */ + + /* for '!', '++' and '--', count must be 1 + * for '-', count may be 1 or 2 + * for '=', count must be 1, and the resulttag is also important + * for all other (binary) operators and the special '~' operator, count must be 2 + */ + switch (opertok) { + case '!': + case '=': + case tINC: + case tDEC: + if (count!=1) + error(62); /* number or placement of the operands does not fit the operator */ + break; + case '-': + if (count!=1 && count!=2) + error(62); /* number or placement of the operands does not fit the operator */ + break; + default: + if (count!=2) + error(62); /* number or placement of the operands does not fit the operator */ + } /* switch */ + + if (tags[0]==0 && ((opertok!='=' && tags[1]==0) || (opertok=='=' && resulttag==0))) + error(64); /* cannot change predefined operators */ + + /* change the operator name */ + assert(strlen(opername)>0); + operator_symname(tmpname,opername,tags[0],tags[1],count,resulttag); + if ((oldsym=findglb(tmpname))!=NULL) { + int i; + if ((oldsym->usage & uDEFINE)!=0) { + char errname[2*sNAMEMAX+16]; + funcdisplayname(errname,tmpname); + error(21,errname); /* symbol already defined */ + } /* if */ + sym->usage|=oldsym->usage; /* copy flags from the previous definition */ + for (i=0; inumrefers; i++) + if (oldsym->refer[i]!=NULL) + refer_symbol(sym,oldsym->refer[i]); + delete_symbol(&glbtab,oldsym); + } /* if */ + strcpy(sym->name,tmpname); + sym->hash=namehash(sym->name);/* calculate new hash */ + + /* operators should return a value, except the '~' operator */ + if (opertok!='~') + sym->usage |= uRETVALUE; + + return TRUE; +} + +static int check_operatortag(int opertok,int resulttag,char *opername) +{ + assert(opername!=NULL && strlen(opername)>0); + switch (opertok) { + case '!': + case '<': + case '>': + case tlEQ: + case tlNE: + case tlLE: + case tlGE: + if (resulttag!=pc_addtag("bool")) { + error(63,opername,"bool:"); /* operator X requires a "bool:" result tag */ + return FALSE; + } /* if */ + break; + case '~': + if (resulttag!=0) { + error(63,opername,"_:"); /* operator "~" requires a "_:" result tag */ + return FALSE; + } /* if */ + break; + } /* switch */ + return TRUE; +} + +static char *tag2str(char *dest,int tag) +{ + tag &= TAGMASK; + assert(tag>=0); + sprintf(dest,"0%x",tag); + return isdigit(dest[1]) ? &dest[1] : dest; +} + +SC_FUNC char *operator_symname(char *symname,char *opername,int tag1,int tag2,int numtags,int resulttag) +{ + char tagstr1[10], tagstr2[10]; + int opertok; + + assert(numtags>=1 && numtags<=2); + opertok= (opername[1]=='\0') ? opername[0] : 0; + if (opertok=='=') + sprintf(symname,"%s%s%s",tag2str(tagstr1,resulttag),opername,tag2str(tagstr2,tag1)); + else if (numtags==1 || opertok=='~') + sprintf(symname,"%s%s",opername,tag2str(tagstr1,tag1)); + else + sprintf(symname,"%s%s%s",tag2str(tagstr1,tag1),opername,tag2str(tagstr2,tag2)); + return symname; +} + +static int parse_funcname(char *fname,int *tag1,int *tag2,char *opname) +{ + char *ptr,*name; + int unary; + + /* tags are only positive, so if the function name starts with a '-', + * the operator is an unary '-' or '--' operator. + */ + if (*fname=='-') { + *tag1=0; + unary=TRUE; + ptr=fname; + } else { + *tag1=(int)strtol(fname,&ptr,16); + unary= ptr==fname; /* unary operator if it doesn't start with a tag name */ + } /* if */ + assert(!unary || *tag1==0); + assert(*ptr!='\0'); + for (name=opname; !isdigit(*ptr); ) + *name++ = *ptr++; + *name='\0'; + *tag2=(int)strtol(ptr,NULL,16); + return unary; +} + +static constvalue *find_tag_byval(int tag) +{ + constvalue *tagsym; + tagsym=find_constval_byval(&tagname_tab,tag & ~PUBLICTAG); + if (tagsym==NULL) + tagsym=find_constval_byval(&tagname_tab,tag | PUBLICTAG); + return tagsym; +} + +SC_FUNC char *funcdisplayname(char *dest,char *funcname) +{ + int tags[2]; + char opname[10]; + constvalue *tagsym[2]; + int unary; + + if (isalpha(*funcname) || *funcname=='_' || *funcname==PUBLIC_CHAR || *funcname=='\0') { + if (dest!=funcname) + strcpy(dest,funcname); + return dest; + } /* if */ + + unary=parse_funcname(funcname,&tags[0],&tags[1],opname); + tagsym[1]=find_tag_byval(tags[1]); + assert(tagsym[1]!=NULL); + if (unary) { + sprintf(dest,"operator%s(%s:)",opname,tagsym[1]->name); + } else { + tagsym[0]=find_tag_byval(tags[0]); + assert(tagsym[0]!=NULL); + /* special case: the assignment operator has the return value as the 2nd tag */ + if (opname[0]=='=' && opname[1]=='\0') + sprintf(dest,"%s:operator%s(%s:)",tagsym[0]->name,opname,tagsym[1]->name); + else + sprintf(dest,"operator%s(%s:,%s:)",opname,tagsym[0]->name,tagsym[1]->name); + } /* if */ + return dest; +} + +static void funcstub(int native) +{ + int tok,tag; + char *str; + cell val,size; + char symbolname[sNAMEMAX+1]; + int idxtag[sDIMEN_MAX]; + int dim[sDIMEN_MAX]; + int numdim; + symbol *sym,*sub; + int opertok; + + opertok=0; + lastst=0; + litidx=0; /* clear the literal pool */ + assert(loctab.next==NULL); /* local symbol table should be empty */ + + tag=pc_addtag(NULL); /* get the tag of the return value */ + numdim=0; + while (matchtoken('[')) { + /* the function returns an array, get this tag for the index and the array + * dimensions + */ + if (numdim == sDIMEN_MAX) { + error(53); /* exceeding maximum number of dimensions */ + return; + } /* if */ + size=needsub(&idxtag[numdim],NULL); /* get size; size==0 for "var[]" */ + if (size==0) + error(9); /* invalid array size */ + #if INT_MAX < LONG_MAX + if (size > INT_MAX) + error(105); /* overflow, exceeding capacity */ + #endif + dim[numdim++]=(int)size; + } /* while */ + + tok=lex(&val,&str); + if (native) { + if (tok==tPUBLIC || tok==tSTOCK || tok==tSTATIC || (tok==tSYMBOL && *str==PUBLIC_CHAR)) + error(42); /* invalid combination of class specifiers */ + } else { + if (tok==tPUBLIC || tok==tSTOCK || tok==tSTATIC) + tok=lex(&val,&str); + } /* if */ + + if (tok==tOPERATOR) { + opertok=operatorname(symbolname); + if (opertok==0) + return; /* error message already given */ + check_operatortag(opertok,tag,symbolname); + } else { + if (tok!=tSYMBOL && freading) { + error(10); /* illegal function or declaration */ + return; + } /* if */ + strcpy(symbolname,str); + } /* if */ + needtoken('('); /* only functions may be native/forward */ + + sym=fetchfunc(symbolname,tag);/* get a pointer to the function entry */ + if (sym==NULL) + return; + if (native) { + sym->usage=(char)(uNATIVE | uRETVALUE | uDEFINE | (sym->usage & uPROTOTYPED)); + sym->x.lib=curlibrary; + } /* if */ + + declargs(sym); + /* "declargs()" found the ")" */ + sc_attachdocumentation(sym); /* attach any documenation to the function */ + if (!operatoradjust(opertok,sym,symbolname,tag)) + sym->usage &= ~uDEFINE; + + if (getstates(symbolname)!=0) { + if (native || opertok!=0) + error(82); /* native functions and operators may not have states */ + else + error(231); /* ignoring state specifications on forward declarations */ + } /* if */ + + /* for a native operator, also need to specify an "exported" function name; + * for a native function, this is optional + */ + if (native) { + if (opertok!=0) { + needtoken('='); + lexpush(); /* push back, for matchtoken() to retrieve again */ + } /* if */ + if (matchtoken('=')) { + /* allow number or symbol */ + if (matchtoken(tSYMBOL)) { + tokeninfo(&val,&str); + insert_alias(sym->name,str); + } else { + constexpr(&val,NULL,NULL); + sym->addr=val; + /* At the moment, I have assumed that this syntax is only valid if + * val < 0. To properly mix "normal" native functions and indexed + * native functions, one should use negative indices anyway. + * Special code for a negative index in sym->addr exists in SC4.C + * (ffcall()) and in SC6.C (the loops for counting the number of native + * variables and for writing them). + */ + } /* if */ + } /* if */ + } /* if */ + needtoken(tTERM); + + /* attach the array to the function symbol */ + if (numdim>0) { + assert(sym!=NULL); + sub=addvariable(symbolname,0,iARRAY,sGLOBAL,tag,dim,numdim,idxtag); + sub->parent=sym; + } /* if */ + + litidx=0; /* clear the literal pool */ + delete_symbols(&loctab,0,TRUE,TRUE);/* clear local variables queue */ +} + +/* newfunc - begin a function + * + * This routine is called from "parse" and tries to make a function + * out of the following text + * + * Global references: funcstatus,lastst,litidx + * rettype (altered) + * curfunc (altered) + * declared (altered) + * glb_declared (altered) + * sc_alignnext (altered) + */ +static int newfunc(char *firstname,int firsttag,int fpublic,int fstatic,int stock) +{ + symbol *sym; + int argcnt,tok,tag,funcline; + int opertok,opererror; + char symbolname[sNAMEMAX+1]; + char *str; + cell val,cidx,glbdecl; + short filenum; + int state_id; + + assert(litidx==0); /* literal queue should be empty */ + litidx=0; /* clear the literal pool (should already be empty) */ + opertok=0; + lastst=0; /* no statement yet */ + cidx=0; /* just to avoid compiler warnings */ + glbdecl=0; + assert(loctab.next==NULL); /* local symbol table should be empty */ + filenum=fcurrent; /* save file number at the start of the declaration */ + + if (firstname!=NULL) { + assert(strlen(firstname)<=sNAMEMAX); + strcpy(symbolname,firstname); /* save symbol name */ + tag=firsttag; + } else { + tag= (firsttag>=0) ? firsttag : pc_addtag(NULL); + tok=lex(&val,&str); + assert(!fpublic); + if (tok==tNATIVE || (tok==tPUBLIC && stock)) + error(42); /* invalid combination of class specifiers */ + if (tok==tOPERATOR) { + opertok=operatorname(symbolname); + if (opertok==0) + return TRUE; /* error message already given */ + check_operatortag(opertok,tag,symbolname); + } else { + if (tok!=tSYMBOL && freading) { + error(20,str); /* invalid symbol name */ + return FALSE; + } /* if */ + assert(strlen(str)<=sNAMEMAX); + strcpy(symbolname,str); + } /* if */ + } /* if */ + /* check whether this is a function or a variable declaration */ + if (!matchtoken('(')) + return FALSE; + /* so it is a function, proceed */ + funcline=fline; /* save line at which the function is defined */ + if (symbolname[0]==PUBLIC_CHAR) { + fpublic=TRUE; /* implicitly public function */ + if (stock) + error(42); /* invalid combination of class specifiers */ + } /* if */ + sym=fetchfunc(symbolname,tag);/* get a pointer to the function entry */ + if (sym==NULL || (sym->usage & uNATIVE)!=0) + return TRUE; /* it was recognized as a function declaration, but not as a valid one */ + if (fpublic) + sym->usage|=uPUBLIC; + if (fstatic) + sym->fnumber=filenum; + /* if the function was used before being declared, and it has a tag for the + * result, add a third pass (as second "skimming" parse) because the function + * result may have been used with user-defined operators, which have now + * been incorrectly flagged (as the return tag was unknown at the time of + * the call) + */ + if ((sym->usage & (uPROTOTYPED | uREAD))==uREAD && sym->tag!=0) { + int curstatus=sc_status; + sc_status=statWRITE; /* temporarily set status to WRITE, so the warning isn't blocked */ + //error(208); //this is silly, it should be caught the first pass + sc_status=curstatus; + sc_reparse=TRUE; /* must add another pass to "initial scan" phase */ + } /* if */ + /* declare all arguments */ + argcnt=declargs(sym); + opererror=!operatoradjust(opertok,sym,symbolname,tag); + if (strcmp(symbolname,uMAINFUNC)==0 || strcmp(symbolname,uENTRYFUNC)==0) { + if (argcnt>0) + error(5); /* "main()" and "entry()" functions may not have any arguments */ + sym->usage|=uREAD; /* "main()" is the program's entry point: always used */ + } /* if */ + state_id=getstates(symbolname); + if (opertok!=0 && state_id>0) + error(82); /* operators may not have states */ + attachstatelist(sym,state_id); + /* "declargs()" found the ")"; if a ";" appears after this, it was a + * prototype */ + if (matchtoken(';')) { + if (!sc_needsemicolon) + error(218); /* old style prototypes used with optional semicolumns */ + delete_symbols(&loctab,0,TRUE,TRUE); /* prototype is done; forget everything */ + return TRUE; + } /* if */ + /* so it is not a prototype, proceed */ + /* if this is a function that is not referred to (this can only be detected + * in the second stage), shut code generation off */ + if (sc_status==statWRITE && (sym->usage & uREAD)==0) { + sc_status=statSKIP; + cidx=code_idx; + glbdecl=glb_declared; + } /* if */ + begcseg(); + sym->usage|=uDEFINE; /* set the definition flag */ + if (fpublic) + sym->usage|=uREAD; /* public functions are always "used" */ + if (stock) + sym->usage|=uSTOCK; + if (opertok!=0 && opererror) + sym->usage &= ~uDEFINE; + /* if the function has states, dump the label to the start of the function */ + if (state_id!=0) { + constvalue *ptr=sym->states->next; + while (ptr!=NULL) { + assert(sc_status!=statWRITE || strlen(ptr->name)>0); + if (ptr->index==state_id) { + setlabel((int)strtol(ptr->name,NULL,16)); + break; + } /* if */ + ptr=ptr->next; + } /* while */ + } /* if */ + startfunc(sym->name); /* creates stack frame */ + insert_dbgline(funcline); + setline(FALSE); + if (sc_alignnext) { + alignframe(sc_dataalign); + sc_alignnext=FALSE; + } /* if */ + declared=0; /* number of local cells */ + rettype=(sym->usage & uRETVALUE); /* set "return type" variable */ + curfunc=sym; + define_args(); /* add the symbolic info for the function arguments */ + #if !defined SC_LIGHT + if (matchtoken('{')) { + lexpush(); + } else { + /* Insert a separator so that comments following the statement will not + * be attached to this function; they should be attached to the next + * function. This is not a problem for functions having a compound block, + * because the closing brace is an explicit "end token" for the function. + * With single statement functions, the preprocessor may overread the + * source code before the parser determines an "end of statement". + */ + insert_docstring_separator(); + } /* if */ + #endif + statement(NULL,FALSE); + if ((rettype & uRETVALUE)!=0) + sym->usage|=uRETVALUE; + if (declared!=0) { + /* This happens only in a very special (and useless) case, where a function + * has only a single statement in its body (no compound block) and that + * statement declares a new variable + */ + modstk((int)declared*sizeof(cell)); /* remove all local variables */ + declared=0; + } /* if */ + if ((lastst!=tRETURN) && (lastst!=tGOTO)){ + ldconst(0,sPRI); + ffret(); + if ((sym->usage & uRETVALUE)!=0) { + char symname[2*sNAMEMAX+16]; /* allow space for user defined operators */ + funcdisplayname(symname,sym->name); + error(209,symname); /* function should return a value */ + } /* if */ + } /* if */ + endfunc(); + sym->codeaddr=code_idx; + sc_attachdocumentation(sym); /* attach collected documenation to the function */ + if (litidx) { /* if there are literals defined */ + glb_declared+=litidx; + begdseg(); /* flip to DATA segment */ + dumplits(); /* dump literal strings */ + litidx=0; + } /* if */ + testsymbols(&loctab,0,TRUE,TRUE); /* test for unused arguments and labels */ + delete_symbols(&loctab,0,TRUE,TRUE); /* clear local variables queue */ + assert(loctab.next==NULL); + curfunc=NULL; + if (sc_status==statSKIP) { + sc_status=statWRITE; + code_idx=cidx; + glb_declared=glbdecl; + } /* if */ + return TRUE; +} + +static int argcompare(arginfo *a1,arginfo *a2) +{ + int result=1,level,i; + + if (result) + result= a1->ident==a2->ident; /* type/class */ + if (result) + result= a1->usage==a2->usage; /* "const" flag */ + if (result) + result= a1->numtags==a2->numtags; /* tags (number and names) */ + for (i=0; result && inumtags; i++) + result= a1->tags[i]==a2->tags[i]; + if (result) + result= a1->numdim==a2->numdim; /* array dimensions & index tags */ + for (level=0; result && levelnumdim; level++) + result= a1->dim[level]==a2->dim[level]; + for (level=0; result && levelnumdim; level++) + result= a1->idxtag[level]==a2->idxtag[level]; + if (result) + result= a1->hasdefault==a2->hasdefault; /* availability of default value */ + if (a1->hasdefault) { + if (a1->ident==iREFARRAY) { + if (result) + result= a1->defvalue.array.size==a2->defvalue.array.size; + if (result) + result= a1->defvalue.array.arraysize==a2->defvalue.array.arraysize; + /* ??? should also check contents of the default array (these troubles + * go away in a 2-pass compiler that forbids double declarations, but + * Pawn currently does not forbid them) */ + } else { + if (result) { + if ((a1->hasdefault & uSIZEOF)!=0 || (a1->hasdefault & uTAGOF)!=0) + result= a1->hasdefault==a2->hasdefault + && strcmp(a1->defvalue.size.symname,a2->defvalue.size.symname)==0 + && a1->defvalue.size.level==a2->defvalue.size.level; + else + result= a1->defvalue.val==a2->defvalue.val; + } /* if */ + } /* if */ + if (result) + result= a1->defvalue_tag==a2->defvalue_tag; + } /* if */ + return result; +} + +/* declargs() + * + * This routine adds an entry in the local symbol table for each argument + * found in the argument list. It returns the number of arguments. + */ +static int declargs(symbol *sym) +{ + #define MAXTAGS 16 + char *ptr; + int argcnt,oldargcnt,tok,tags[MAXTAGS],numtags; + cell val; + arginfo arg, *arglist; + char name[sNAMEMAX+1]; + int ident,fpublic,fconst; + int idx; + + /* if the function is already defined earlier, get the number of arguments + * of the existing definition + */ + oldargcnt=0; + if ((sym->usage & uPROTOTYPED)!=0) + while (sym->dim.arglist[oldargcnt].ident!=0) + oldargcnt++; + argcnt=0; /* zero aruments up to now */ + ident=iVARIABLE; + numtags=0; + fconst=FALSE; + fpublic= (sym->usage & uPUBLIC)!=0; + /* the '(' parantheses has already been parsed */ + if (!matchtoken(')')){ + do { /* there are arguments; process them */ + /* any legal name increases argument count (and stack offset) */ + tok=lex(&val,&ptr); + switch (tok) { + case 0: + /* nothing */ + break; + case '&': + if (ident!=iVARIABLE || numtags>0) + error(1,"-identifier-","&"); + ident=iREFERENCE; + break; + case tCONST: + if (ident!=iVARIABLE || numtags>0) + error(1,"-identifier-","const"); + fconst=TRUE; + break; + case tLABEL: + if (numtags>0) + error(1,"-identifier-","-tagname-"); + tags[0]=pc_addtag(ptr); + numtags=1; + break; + case '{': + if (numtags>0) + error(1,"-identifier-","-tagname-"); + numtags=0; + while (numtags=sMAXARGS) + error(45); /* too many function arguments */ + strcpy(name,ptr); /* save symbol name */ + if (name[0]==PUBLIC_CHAR) + error(56,name); /* function arguments cannot be public */ + if (numtags==0) + tags[numtags++]=0; /* default tag */ + /* Stack layout: + * base + 0*sizeof(cell) == previous "base" + * base + 1*sizeof(cell) == function return address + * base + 2*sizeof(cell) == number of arguments + * base + 3*sizeof(cell) == first argument of the function + * So the offset of each argument is "(argcnt+3) * sizeof(cell)". + */ + doarg(name,ident,(argcnt+3)*sizeof(cell),tags,numtags,fpublic,fconst,&arg); + if (fpublic && arg.hasdefault) + error(59,name); /* arguments of a public function may not have a default value */ + if ((sym->usage & uPROTOTYPED)==0) { + /* redimension the argument list, add the entry */ + sym->dim.arglist=(arginfo*)realloc(sym->dim.arglist,(argcnt+2)*sizeof(arginfo)); + if (sym->dim.arglist==0) + error(103); /* insufficient memory */ + memset(&sym->dim.arglist[argcnt+1],0,sizeof(arginfo)); /* keep the list terminated */ + sym->dim.arglist[argcnt]=arg; + } else { + /* check the argument with the earlier definition */ + if (argcnt>oldargcnt || !argcompare(&sym->dim.arglist[argcnt],&arg)) + error(25); /* function definition does not match prototype */ + /* may need to free default array argument and the tag list */ + if (arg.ident==iREFARRAY && arg.hasdefault) + free(arg.defvalue.array.data); + else if (arg.ident==iVARIABLE + && ((arg.hasdefault & uSIZEOF)!=0 || (arg.hasdefault & uTAGOF)!=0)) + free(arg.defvalue.size.symname); + free(arg.tags); + } /* if */ + argcnt++; + ident=iVARIABLE; + numtags=0; + fconst=FALSE; + break; + case tELLIPS: + if (ident!=iVARIABLE) + error(10); /* illegal function or declaration */ + if (numtags==0) + tags[numtags++]=0; /* default tag */ + if ((sym->usage & uPROTOTYPED)==0) { + /* redimension the argument list, add the entry iVARARGS */ + sym->dim.arglist=(arginfo*)realloc(sym->dim.arglist,(argcnt+2)*sizeof(arginfo)); + if (sym->dim.arglist==0) + error(103); /* insufficient memory */ + memset(&sym->dim.arglist[argcnt+1],0,sizeof(arginfo)); /* keep the list terminated */ + sym->dim.arglist[argcnt].ident=iVARARGS; + sym->dim.arglist[argcnt].hasdefault=FALSE; + sym->dim.arglist[argcnt].defvalue.val=0; + sym->dim.arglist[argcnt].defvalue_tag=0; + sym->dim.arglist[argcnt].numtags=numtags; + sym->dim.arglist[argcnt].tags=(int*)malloc(numtags*sizeof tags[0]); + if (sym->dim.arglist[argcnt].tags==NULL) + error(103); /* insufficient memory */ + memcpy(sym->dim.arglist[argcnt].tags,tags,numtags*sizeof tags[0]); + } else { + if (argcnt>oldargcnt || sym->dim.arglist[argcnt].ident!=iVARARGS) + error(25); /* function definition does not match prototype */ + } /* if */ + argcnt++; + break; + default: + error(10); /* illegal function or declaration */ + } /* switch */ + } while (tok=='&' || tok==tLABEL || tok==tCONST + || (tok!=tELLIPS && matchtoken(','))); /* more? */ + /* if the next token is not ",", it should be ")" */ + needtoken(')'); + } /* if */ + /* resolve any "sizeof" arguments (now that all arguments are known) */ + assert(sym->dim.arglist!=NULL); + arglist=sym->dim.arglist; + for (idx=0; idx=argcnt) { + error(17,ptr); /* undefined symbol */ + } else { + assert(arglist[idx].defvalue.size.symname!=NULL); + /* check the level against the number of dimensions */ + if (arglist[idx].defvalue.size.level>0 + && arglist[idx].defvalue.size.level>=arglist[altidx].numdim) + error(28,arglist[idx].name); /* invalid subscript */ + /* check the type of the argument whose size to take; for a iVARIABLE + * or a iREFERENCE, this is always 1 (so the code is redundant) + */ + assert(arglist[altidx].ident!=iVARARGS); + if (arglist[altidx].ident!=iREFARRAY && (arglist[idx].hasdefault & uSIZEOF)!=0) { + if ((arglist[idx].hasdefault & uTAGOF)!=0) { + error(81,arglist[idx].name); /* cannot take "tagof" an indexed array */ + } else { + assert(arglist[altidx].ident==iVARIABLE || arglist[altidx].ident==iREFERENCE); + error(223,ptr); /* redundant sizeof */ + } /* if */ + } /* if */ + } /* if */ + } /* if */ + } /* for */ + + sym->usage|=uPROTOTYPED; + errorset(sRESET); /* reset error flag (clear the "panic mode")*/ + return argcnt; +} + +/* doarg - declare one argument type + * + * this routine is called from "declargs()" and adds an entry in the local + * symbol table for one argument. + * + * "fpublic" indicates whether the function for this argument list is public. + * The arguments themselves are never public. + */ +static void doarg(char *name,int ident,int offset,int tags[],int numtags, + int fpublic,int fconst,arginfo *arg) +{ + symbol *argsym; + constvalue *enumroot; + cell size; + + strcpy(arg->name,name); + arg->hasdefault=FALSE; /* preset (most common case) */ + arg->defvalue.val=0; /* clear */ + arg->defvalue_tag=0; + arg->numdim=0; + if (matchtoken('[')) { + if (ident==iREFERENCE) + error(67,name); /* illegal declaration ("&name[]" is unsupported) */ + do { + if (arg->numdim == sDIMEN_MAX) { + error(53); /* exceeding maximum number of dimensions */ + return; + } /* if */ + size=needsub(&arg->idxtag[arg->numdim],&enumroot);/* may be zero here, it is a pointer anyway */ + #if INT_MAX < LONG_MAX + if (size > INT_MAX) + error(105); /* overflow, exceeding capacity */ + #endif + arg->dim[arg->numdim]=(int)size; + arg->numdim+=1; + } while (matchtoken('[')); + ident=iREFARRAY; /* "reference to array" (is a pointer) */ + if (matchtoken('=')) { + lexpush(); /* initials() needs the "=" token again */ + assert(litidx==0); /* at the start of a function, this is reset */ + assert(numtags>0); + initials(ident,tags[0],&size,arg->dim,arg->numdim,enumroot); + assert(size>=litidx); + /* allocate memory to hold the initial values */ + arg->defvalue.array.data=(cell *)malloc(litidx*sizeof(cell)); + if (arg->defvalue.array.data!=NULL) { + int i; + memcpy(arg->defvalue.array.data,litq,litidx*sizeof(cell)); + arg->hasdefault=TRUE; /* argument has default value */ + arg->defvalue.array.size=litidx; + arg->defvalue.array.addr=-1; + /* calulate size to reserve on the heap */ + arg->defvalue.array.arraysize=1; + for (i=0; inumdim; i++) + arg->defvalue.array.arraysize*=arg->dim[i]; + if (arg->defvalue.array.arraysize < arg->defvalue.array.size) + arg->defvalue.array.arraysize = arg->defvalue.array.size; + } /* if */ + litidx=0; /* reset */ + } /* if */ + } else { + if (matchtoken('=')) { + unsigned char size_tag_token; + assert(ident==iVARIABLE || ident==iREFERENCE); + arg->hasdefault=TRUE; /* argument has a default value */ + size_tag_token=(unsigned char)(matchtoken(tSIZEOF) ? uSIZEOF : 0); + if (size_tag_token==0) + size_tag_token=(unsigned char)(matchtoken(tTAGOF) ? uTAGOF : 0); + if (size_tag_token!=0) { + int paranthese; + if (ident==iREFERENCE) + error(66,name); /* argument may not be a reference */ + paranthese=0; + while (matchtoken('(')) + paranthese++; + if (needtoken(tSYMBOL)) { + /* save the name of the argument whose size id to take */ + char *name; + cell val; + tokeninfo(&val,&name); + if ((arg->defvalue.size.symname=duplicatestring(name)) == NULL) + error(103); /* insufficient memory */ + arg->defvalue.size.level=0; + if (size_tag_token==uSIZEOF) { + while (matchtoken('[')) { + arg->defvalue.size.level+=(short)1; + needtoken(']'); + } /* while */ + } /* if */ + if (ident==iVARIABLE) /* make sure we set this only if not a reference */ + arg->hasdefault |= size_tag_token; /* uSIZEOF or uTAGOF */ + } /* if */ + while (paranthese--) + needtoken(')'); + } else { + constexpr(&arg->defvalue.val,&arg->defvalue_tag,NULL); + assert(numtags>0); + if (!matchtag(tags[0],arg->defvalue_tag,TRUE)) + error(213); /* tagname mismatch */ + } /* if */ + } /* if */ + } /* if */ + arg->ident=(char)ident; + arg->usage=(char)(fconst ? uCONST : 0); + arg->numtags=numtags; + arg->tags=(int*)malloc(numtags*sizeof tags[0]); + if (arg->tags==NULL) + error(103); /* insufficient memory */ + memcpy(arg->tags,tags,numtags*sizeof tags[0]); + argsym=findloc(name); + if (argsym!=NULL) { + error(21,name); /* symbol already defined */ + } else { + if ((argsym=findglb(name))!=NULL && argsym->ident!=iFUNCTN && curfunc!=NULL) + error(219,name); /* variable shadows another symbol */ + /* add details of type and address */ + assert(numtags>0); + argsym=addvariable(name,offset,ident,sLOCAL,tags[0], + arg->dim,arg->numdim,arg->idxtag); + argsym->compound=0; + if (ident==iREFERENCE) + argsym->usage|=uREAD; /* because references are passed back */ + if (fpublic) + argsym->usage|=uREAD; /* arguments of public functions are always "used" */ + if (fconst) + argsym->usage|=uCONST; + } /* if */ +} + +static int count_referrers(symbol *entry) +{ + int i,count; + + count=0; + for (i=0; inumrefers; i++) + if (entry->refer[i]!=NULL) + count++; + return count; +} + +#if !defined SC_LIGHT +static int find_xmltag(char *source,char *xmltag,char *xmlparam,char *xmlvalue, + char **outer_start,int *outer_length, + char **inner_start,int *inner_length) +{ + char *ptr,*inner_end; + int xmltag_len,xmlparam_len,xmlvalue_len; + int match; + + assert(source!=NULL); + assert(xmltag!=NULL); + assert(outer_start!=NULL); + assert(outer_length!=NULL); + assert(inner_start!=NULL); + assert(inner_length!=NULL); + + /* both NULL or both non-NULL */ + assert(xmlvalue!=NULL && xmlparam!=NULL || xmlvalue==NULL && xmlparam==NULL); + + xmltag_len=strlen(xmltag); + xmlparam_len= (xmlparam!=NULL) ? strlen(xmlparam) : 0; + xmlvalue_len= (xmlvalue!=NULL) ? strlen(xmlvalue) : 0; + ptr=source; + /* find an opening '<' */ + while ((ptr=strchr(ptr,'<'))!=NULL) { + *outer_start=ptr; /* be optimistic... */ + match=FALSE; /* ...and pessimistic at the same time */ + ptr++; /* skip '<' */ + while (*ptr!='\0' && *ptr<=' ') + ptr++; /* skip white space */ + if (strncmp(ptr,xmltag,xmltag_len)==0 && (*(ptr+xmltag_len)<=' ' || *(ptr+xmltag_len)=='>')) { + /* xml tag found, optionally check the parameter */ + ptr+=xmltag_len; + while (*ptr!='\0' && *ptr<=' ') + ptr++; /* skip white space */ + if (xmlparam!=NULL) { + if (strncmp(ptr,xmlparam,xmlparam_len)==0 && (*(ptr+xmlparam_len)<=' ' || *(ptr+xmlparam_len)=='=')) { + ptr+=xmlparam_len; + while (*ptr!='\0' && *ptr<=' ') + ptr++; /* skip white space */ + if (*ptr=='=') { + ptr++; /* skip '=' */ + while (*ptr!='\0' && *ptr<=' ') + ptr++; /* skip white space */ + if (*ptr=='"' || *ptr=='\'') + ptr++; /* skip " or ' */ + assert(xmlvalue!=NULL); + if (strncmp(ptr,xmlvalue,xmlvalue_len)==0 + && (*(ptr+xmlvalue_len)<=' ' + || *(ptr+xmlvalue_len)=='>' + || *(ptr+xmlvalue_len)=='"' + || *(ptr+xmlvalue_len)=='\'')) + match=TRUE; /* found it */ + } /* if */ + } /* if */ + } else { + match=TRUE; /* don't check the parameter */ + } /* if */ + } /* if */ + if (match) { + /* now find the end of the opening tag */ + while (*ptr!='\0' && *ptr!='>') + ptr++; + if (*ptr=='>') + ptr++; + while (*ptr!='\0' && *ptr<=' ') + ptr++; /* skip white space */ + *inner_start=ptr; + /* find the start of the closing tag (assume no nesting) */ + while ((ptr=strchr(ptr,'<'))!=NULL) { + inner_end=ptr; + ptr++; /* skip '<' */ + while (*ptr!='\0' && *ptr<=' ') + ptr++; /* skip white space */ + if (*ptr=='/') { + ptr++; /* skip / */ + while (*ptr!='\0' && *ptr<=' ') + ptr++; /* skip white space */ + if (strncmp(ptr,xmltag,xmltag_len)==0 && (*(ptr+xmltag_len)<=' ' || *(ptr+xmltag_len)=='>')) { + /* find the end of the closing tag */ + while (*ptr!='\0' && *ptr!='>') + ptr++; + if (*ptr=='>') + ptr++; + /* set the lengths of the inner and outer segment */ + assert(*inner_start!=NULL); + *inner_length=(int)(inner_end-*inner_start); + assert(*outer_start!=NULL); + *outer_length=(int)(ptr-*outer_start); + break; /* break out of the loop */ + } /* if */ + } /* if */ + } /* while */ + return TRUE; + } /* if */ + } /* while */ + return FALSE; /* not found */ +} + +static char *xmlencode(char *dest,char *source) +{ + char temp[2*sNAMEMAX+20],*ptr; + + /* replace < by < and such; normally, such a symbol occurs at most once in + * a symbol name (e.g. "operator<") + */ + ptr=temp; + while (*source!='\0') { + switch (*source) { + case '<': + strcpy(ptr,"<"); + ptr+=4; + break; + case '>': + strcpy(ptr,">"); + ptr+=4; + break; + case '&': + strcpy(ptr,"&"); + ptr+=5; + break; + default: + *ptr++=*source; + } /* switch */ + source++; + } /* while */ + *ptr='\0'; + strcpy(dest,temp); + return dest; +} + +static void make_report(symbol *root,FILE *log,char *sourcefile) +{ + char symname[2*sNAMEMAX+20]; + int i,arg; + symbol *sym,*ref; + constvalue *tagsym; + constvalue *enumroot; + char *ptr; + + /* the XML header */ + fprintf(log,"\n"); + fprintf(log,"\n"); + fprintf(log,"\n",sourcefile); + ptr=strrchr(sourcefile,DIRSEP_CHAR); + if (ptr!=NULL) + ptr++; + else + ptr=sourcefile; + fprintf(log,"\t\n\t\t%s\n\t\n",ptr); + + /* attach the global documentation, if any */ + if (sc_documentation!=NULL) { + fprintf(log,"\n\t\n"); + fprintf(log,"\t\n\t\t"); + fputs(sc_documentation,log); + fprintf(log,"\n\t\n\n"); + } /* if */ + + /* use multiple passes to print constants variables and functions in + * separate sections + */ + fprintf(log,"\t\n"); + + fprintf(log,"\n\t\t\n"); + for (sym=root->next; sym!=NULL; sym=sym->next) { + if (sym->parent!=NULL) + continue; /* hierarchical data type */ + assert(sym->ident==iCONSTEXPR || sym->ident==iVARIABLE + || sym->ident==iARRAY || sym->ident==iFUNCTN); + if (sym->ident!=iCONSTEXPR || (sym->usage & uENUMROOT)==0) + continue; + if ((sym->usage & uREAD)==0) + continue; + fprintf(log,"\t\t\n",funcdisplayname(symname,sym->name),(long)sym->addr); + if (sym->tag!=0) { + tagsym=find_tag_byval(sym->tag); + assert(tagsym!=NULL); + fprintf(log,"\t\t\t\n",tagsym->name); + } /* if */ + /* browse through all fields */ + if ((enumroot=sym->dim.enumlist)!=NULL) { + enumroot=enumroot->next; /* skip root */ + while (enumroot!=NULL) { + fprintf(log,"\t\t\t\n",funcdisplayname(symname,enumroot->name),(long)enumroot->value); + /* find the constant with this name and get the tag */ + ref=findglb(enumroot->name); + if (ref!=NULL) { + if (ref->x.idxtag!=0) { + tagsym=find_tag_byval(ref->x.idxtag); + assert(tagsym!=NULL); + fprintf(log,"\t\t\t\t\n",tagsym->name); + } /* if */ + if (ref->dim.array.length!=1) + fprintf(log,"\t\t\t\t\n",(long)ref->dim.array.length); + } /* if */ + fprintf(log,"\t\t\t\n"); + enumroot=enumroot->next; + } /* while */ + } /* if */ + assert(sym->refer!=NULL); + for (i=0; inumrefers; i++) { + if ((ref=sym->refer[i])!=NULL) + fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); + } /* for */ + if (sym->documentation!=NULL) + fprintf(log,"\t\t\t%s\n",sym->documentation); + fprintf(log,"\t\t\n"); + } /* for */ + + fprintf(log,"\n\t\t\n"); + for (sym=root->next; sym!=NULL; sym=sym->next) { + if (sym->parent!=NULL) + continue; /* hierarchical data type */ + assert(sym->ident==iCONSTEXPR || sym->ident==iVARIABLE + || sym->ident==iARRAY || sym->ident==iFUNCTN); + if (sym->ident!=iCONSTEXPR) + continue; + if ((sym->usage & uREAD)==0 || (sym->usage & (uENUMFIELD | uENUMROOT))!=0) + continue; + fprintf(log,"\t\t\n",funcdisplayname(symname,sym->name),(long)sym->addr); + if (sym->tag!=0) { + tagsym=find_tag_byval(sym->tag); + assert(tagsym!=NULL); + fprintf(log,"\t\t\t\n",tagsym->name); + } /* if */ + assert(sym->refer!=NULL); + for (i=0; inumrefers; i++) { + if ((ref=sym->refer[i])!=NULL) + fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); + } /* for */ + if (sym->documentation!=NULL) + fprintf(log,"\t\t\t%s\n",sym->documentation); + fprintf(log,"\t\t\n"); + } /* for */ + + fprintf(log,"\n\t\t\n"); + for (sym=root->next; sym!=NULL; sym=sym->next) { + if (sym->parent!=NULL) + continue; /* hierarchical data type */ + if (sym->ident!=iVARIABLE && sym->ident!=iARRAY) + continue; + fprintf(log,"\t\t\n",funcdisplayname(symname,sym->name)); + if (sym->tag!=0) { + tagsym=find_tag_byval(sym->tag); + assert(tagsym!=NULL); + fprintf(log,"\t\t\t\n",tagsym->name); + } /* if */ + assert(sym->refer!=NULL); + if ((sym->usage & uPUBLIC)!=0) + fprintf(log,"\t\t\t\n"); + for (i=0; inumrefers; i++) { + if ((ref=sym->refer[i])!=NULL) + fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); + } /* for */ + if (sym->documentation!=NULL) + fprintf(log,"\t\t\t%s\n",sym->documentation); + fprintf(log,"\t\t\n"); + } /* for */ + + fprintf(log,"\n\t\t\n"); + for (sym=root->next; sym!=NULL; sym=sym->next) { + if (sym->parent!=NULL) + continue; /* hierarchical data type */ + if (sym->ident!=iFUNCTN) + continue; + if ((sym->usage & (uREAD | uNATIVE))==uNATIVE) + continue; /* unused native function */ + funcdisplayname(symname,sym->name); + xmlencode(symname,symname); + fprintf(log,"\t\tdim.arglist!=NULL); + for (arg=0; sym->dim.arglist[arg].ident!=0; arg++) { + int dim; + if (arg>0) + fprintf(log,", "); + switch (sym->dim.arglist[arg].ident) { + case iVARIABLE: + fprintf(log,"%s",sym->dim.arglist[arg].name); + break; + case iREFERENCE: + fprintf(log,"&%s",sym->dim.arglist[arg].name); + break; + case iREFARRAY: + fprintf(log,"%s",sym->dim.arglist[arg].name); + for (dim=0; dimdim.arglist[arg].numdim;dim++) + fprintf(log,"[]"); + break; + case iVARARGS: + fprintf(log,"..."); + break; + } /* switch */ + } /* for */ + /* ??? should also print an "array return" size */ + fprintf(log,")\">\n"); + if (sym->tag!=0) { + tagsym=find_tag_byval(sym->tag); + assert(tagsym!=NULL); + fprintf(log,"\t\t\t\n",tagsym->name); + } /* if */ + /* check whether this function is called from the outside */ + if ((sym->usage & uNATIVE)!=0) + fprintf(log,"\t\t\t\n"); + if ((sym->usage & uPUBLIC)!=0) + fprintf(log,"\t\t\t\n"); + if (strcmp(sym->name,uMAINFUNC)==0 || strcmp(sym->name,uENTRYFUNC)==0) + fprintf(log,"\t\t\t\n"); + if ((sym->usage & uNATIVE)==0) + fprintf(log,"\t\t\t\n",(long)sym->x.stacksize); + if (sym->states!=NULL) { + constvalue *stlist=sym->states->next; + assert(stlist!=NULL); /* there should be at least one state item */ + while (stlist!=NULL && stlist->index==-1) + stlist=stlist->next; + assert(stlist!=NULL); /* state id should be found */ + i=state_getfsa(stlist->index); + assert(i>=0); /* automaton 0 exists */ + stlist=automaton_findid(i); + assert(stlist!=NULL); /* automaton should be found */ + fprintf(log,"\t\t\t\n", strlen(stlist->name)>0 ? stlist->name : "(anonymous)"); + //??? dump state decision table + } /* if */ + assert(sym->refer!=NULL); + for (i=0; inumrefers; i++) + if ((ref=sym->refer[i])!=NULL) + fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); + /* print all symbols that are required for this function to compile */ + for (ref=root->next; ref!=NULL; ref=ref->next) { + if (ref==sym) + continue; + for (i=0; inumrefers; i++) + if (ref->refer[i]==sym) + fprintf(log,"\t\t\t\n",xmlencode(symname,funcdisplayname(symname,ref->name))); + } /* for */ + /* print parameter list, with tag & const information, plus descriptions */ + assert(sym->dim.arglist!=NULL); + for (arg=0; sym->dim.arglist[arg].ident!=0; arg++) { + int dim,paraminfo; + char *outer_start,*inner_start; + int outer_length=0,inner_length=0; + if (sym->dim.arglist[arg].ident==iVARARGS) + fprintf(log,"\t\t\t\n"); + else + fprintf(log,"\t\t\t\n",sym->dim.arglist[arg].name); + /* print the tag name(s) for each parameter */ + assert(sym->dim.arglist[arg].numtags>0); + assert(sym->dim.arglist[arg].tags!=NULL); + paraminfo=(sym->dim.arglist[arg].numtags>1 || sym->dim.arglist[arg].tags[0]!=0) + || sym->dim.arglist[arg].ident==iREFERENCE + || sym->dim.arglist[arg].ident==iREFARRAY; + if (paraminfo) + fprintf(log,"\t\t\t\t"); + if (sym->dim.arglist[arg].numtags>1 || sym->dim.arglist[arg].tags[0]!=0) { + assert(paraminfo); + if (sym->dim.arglist[arg].numtags>1) + fprintf(log," {"); + for (i=0; idim.arglist[arg].numtags; i++) { + if (i>0) + fprintf(log,","); + tagsym=find_tag_byval(sym->dim.arglist[arg].tags[i]); + assert(tagsym!=NULL); + fprintf(log,"%s",tagsym->name); + } /* for */ + if (sym->dim.arglist[arg].numtags>1) + fprintf(log,"}"); + } /* if */ + switch (sym->dim.arglist[arg].ident) { + case iREFERENCE: + fprintf(log," &"); + break; + case iREFARRAY: + fprintf(log," "); + for (dim=0; dimdim.arglist[arg].numdim; dim++) { + if (sym->dim.arglist[arg].dim[dim]==0) { + fprintf(log,"[]"); + } else { + //??? find index tag + fprintf(log,"[%d]",sym->dim.arglist[arg].dim[dim]); + } /* if */ + } /* for */ + break; + } /* switch */ + if (paraminfo) + fprintf(log," \n"); + /* print the user description of the parameter (parse through + * sym->documentation) + */ + if (sym->documentation!=NULL + && find_xmltag(sym->documentation, "param", "name", sym->dim.arglist[arg].name, + &outer_start, &outer_length, &inner_start, &inner_length)) + { + char *tail; + fprintf(log,"\t\t\t\t%.*s\n",inner_length,inner_start); + /* delete from documentation string */ + tail=outer_start+outer_length; + memmove(outer_start,tail,strlen(tail)+1); + } /* if */ + fprintf(log,"\t\t\t\n"); + } /* for */ + if (sym->documentation!=NULL) + fprintf(log,"\t\t\t%s\n",sym->documentation); + fprintf(log,"\t\t\n"); + } /* for */ + + fprintf(log,"\n\t\n"); + fprintf(log,"\n"); +} +#endif + +/* Every symbol has a referrer list, that contains the functions that use + * the symbol. Now, if function "apple" is accessed by functions "banana" and + * "citron", but neither function "banana" nor "citron" are used by anyone + * else, then, by inference, function "apple" is not used either. + */ +static void reduce_referrers(symbol *root) +{ + int i,restart; + symbol *sym,*ref; + + do { + restart=0; + for (sym=root->next; sym!=NULL; sym=sym->next) { + if (sym->parent!=NULL) + continue; /* hierarchical data type */ + if (sym->ident==iFUNCTN + && (sym->usage & uNATIVE)==0 + && (sym->usage & uPUBLIC)==0 && strcmp(sym->name,uMAINFUNC)!=0 && strcmp(sym->name,uENTRYFUNC)!=0 + && count_referrers(sym)==0) + { + sym->usage&=~(uREAD | uWRITTEN); /* erase usage bits if there is no referrer */ + /* find all symbols that are referred by this symbol */ + for (ref=root->next; ref!=NULL; ref=ref->next) { + if (ref->parent!=NULL) + continue; /* hierarchical data type */ + assert(ref->refer!=NULL); + for (i=0; inumrefers && ref->refer[i]!=sym; i++) + /* nothing */; + if (inumrefers) { + assert(ref->refer[i]==sym); + ref->refer[i]=NULL; + restart++; + } /* if */ + } /* for */ + } else if ((sym->ident==iVARIABLE || sym->ident==iARRAY) + && (sym->usage & uPUBLIC)==0 + && sym->parent==NULL + && count_referrers(sym)==0) + { + sym->usage&=~(uREAD | uWRITTEN); /* erase usage bits if there is no referrer */ + } /* if */ + } /* for */ + /* after removing a symbol, check whether more can be removed */ + } while (restart>0); +} + +#if !defined SC_LIGHT +static long max_stacksize_recurse(symbol *sym,long basesize,int *pubfuncparams) +{ + long size,maxsize; + int i; + + assert(sym!=NULL); + assert(sym->ident==iFUNCTN); + assert((sym->usage & uNATIVE)==0); + /* recursion detection */ + if (sym->compound==0) + return -1; /* this function was processed already -> recursion */ + sym->compound=0; + + maxsize=sym->x.stacksize; + for (i=0; inumrefers; i++) { + if (sym->refer[i]!=NULL) { + assert(sym->refer[i]->ident==iFUNCTN); + assert((sym->refer[i]->usage & uNATIVE)==0); /* a native function cannot refer to a user-function */ + size=max_stacksize_recurse(sym->refer[i],sym->x.stacksize,pubfuncparams); + if (size<0) + return size; /* recursion was detected, quit */ + if (maxsizeusage & uPUBLIC)!=0) { + /* Find out how many parameters a public function has, then see if this + * is bigger than some maximum + */ + arginfo *arg=sym->dim.arglist; + int count=0; + assert(arg!=0); + while (arg->ident!=0) { + count++; + arg++; + } /* while */ + assert(pubfuncparams!=0); + if (count>*pubfuncparams) + *pubfuncparams=count; + } /* if */ + + return maxsize+basesize; +} + +static long max_stacksize(symbol *root) +{ + /* Loop over all non-native functions. For each function, loop + * over all of its referrers, accumulating the stack requirements. + * Detect (indirect) recursion with a "mark-and-sweep" algorithm. + * I (mis-)use the "compound" field of the symbol structure for + * the marker, as this field is unused for functions. + * + * Note that the stack is shared with the heap. A host application + * may "eat" cells from the heap as well, through amx_Allot(). The + * stack requirements are thus only an estimate. + */ + long size,maxsize; + int maxparams; + symbol *sym; + + #if !defined NDEBUG + for (sym=root->next; sym!=NULL; sym=sym->next) + if (sym->ident==iFUNCTN) + assert(sym->compound==0); + #endif + + maxsize=0; + maxparams=0; + for (sym=root->next; sym!=NULL; sym=sym->next) { + symbol *tmpsym; + /* drop out if this is not a user-implemented function */ + if (sym->ident!=iFUNCTN || (sym->usage & uNATIVE)!=0) + continue; + /* set a "mark" on all functions */ + for (tmpsym=root->next; tmpsym!=NULL; tmpsym=tmpsym->next) + if (tmpsym->ident==iFUNCTN) + tmpsym->compound=1; + /* accumulate stack size for this symbol */ + size=max_stacksize_recurse(sym,0L,&maxparams); + if (size<0) + return size; /* recursion was detected */ + if (maxsizenext; sym!=NULL; sym=sym->next) + if (sym->ident==iFUNCTN) + sym->compound=0; + + maxsize++; /* +1 because a zero cell is always pushed on top + * of the stack to catch stack overwrites */ + return maxsize+(maxparams+1);/* +1 because # of parameters is always pushed on entry */ +} +#endif + +/* testsymbols - test for unused local or global variables + * + * "Public" functions are excluded from the check, since these + * may be exported to other object modules. + * Labels are excluded from the check if the argument 'testlabs' + * is 0. Thus, labels are not tested until the end of the function. + * Constants may also be excluded (convenient for global constants). + * + * When the nesting level drops below "level", the check stops. + * + * The function returns whether there is an "entry" point for the file. + * This flag will only be 1 when browsing the global symbol table. + */ +static int testsymbols(symbol *root,int level,int testlabs,int testconst) +{ + char symname[2*sNAMEMAX+16]; + int entry=FALSE; + + symbol *sym=root->next; + while (sym!=NULL && sym->compound>=level) { + switch (sym->ident) { + case iLABEL: + if (testlabs) { + if ((sym->usage & uDEFINE)==0) + error(19,sym->name); /* not a label: ... */ + else if ((sym->usage & uREAD)==0) + error(203,sym->name); /* symbol isn't used: ... */ + } /* if */ + break; + case iFUNCTN: + if ((sym->usage & (uDEFINE | uREAD | uNATIVE | uSTOCK))==uDEFINE) { + funcdisplayname(symname,sym->name); + if (strlen(symname)>0) + error(203,symname); /* symbol isn't used ... (and not native/stock) */ + } /* if */ + if ((sym->usage & uPUBLIC)!=0 || strcmp(sym->name,uMAINFUNC)==0) + entry=TRUE; /* there is an entry point */ + /* also mark the function to the debug information */ + if ((sym->usage & uREAD)!=0 && (sym->usage & uNATIVE)==0) + insert_dbgsymbol(sym); + break; + case iCONSTEXPR: + if (testconst && (sym->usage & uREAD)==0) + error(203,sym->name); /* symbol isn't used: ... */ + break; + default: + /* a variable */ + if (sym->parent!=NULL) + break; /* hierarchical data type */ + if ((sym->usage & (uWRITTEN | uREAD | uSTOCK))==0) + error(203,sym->name); /* symbol isn't used (and not stock) */ + else if ((sym->usage & (uREAD | uSTOCK | uPUBLIC))==0) + error(204,sym->name); /* value assigned to symbol is never used */ +#if 0 // ??? not sure whether it is a good idea to force people use "const" + else if ((sym->usage & (uWRITTEN | uPUBLIC | uCONST))==0 && sym->ident==iREFARRAY) + error(214,sym->name); /* make array argument "const" */ +#endif + /* also mark the variable (local or global) to the debug information */ + if ((sym->usage & (uWRITTEN | uREAD))!=0 && (sym->usage & uNATIVE)==0) + insert_dbgsymbol(sym); + } /* if */ + sym=sym->next; + } /* while */ + + return entry; +} + +static cell calc_array_datasize(symbol *sym, cell *offset) +{ + cell length; + + assert(sym!=NULL); + assert(sym->ident==iARRAY || sym->ident==iREFARRAY); + length=sym->dim.array.length; + if (sym->dim.array.level > 0) { + cell sublength=calc_array_datasize(finddepend(sym),offset); + if (offset!=NULL) + *offset=length*(*offset+sizeof(cell)); + if (sublength>0) + length*=length*sublength; + else + length=0; + } else { + if (offset!=NULL) + *offset=0; + } /* if */ + return length; +} + +static void destructsymbols(symbol *root,int level) +{ + cell offset=0; + int savepri=FALSE; + symbol *sym=root->next; + while (sym!=NULL && sym->compound>=level) { + if (sym->ident==iVARIABLE || sym->ident==iARRAY) { + char symbolname[16]; + symbol *opsym; + cell elements; + /* check that the '~' operator is defined for this tag */ + operator_symname(symbolname,"~",sym->tag,0,1,0); + if ((opsym=findglb(symbolname))!=NULL) { + /* save PRI, in case of a return statment */ + if (!savepri) { + pushreg(sPRI); /* right-hand operand is in PRI */ + savepri=TRUE; + } /* if */ + /* if the variable is an array, get the number of elements */ + if (sym->ident==iARRAY) { + elements=calc_array_datasize(sym,&offset); + /* "elements" can be zero when the variable is declared like + * new mytag: myvar[2][] = { {1, 2}, {3, 4} } + * one should declare all dimensions! + */ + if (elements==0) + error(46,sym->name); /* array size is unknown */ + } else { + elements=1; + offset=0; + } /* if */ + pushval(elements); + /* call the '~' operator */ + address(sym,sPRI); + addconst(offset); /* add offset to array data to the address */ + pushreg(sPRI); + pushval(2*sizeof(cell));/* 2 parameters */ + assert(opsym->ident==iFUNCTN); + ffcall(opsym,NULL,1); + if (sc_status!=statSKIP) + markusage(opsym,uREAD); /* do not mark as "used" when this call itself is skipped */ + if ((opsym->usage & uNATIVE)!=0 && opsym->x.lib!=NULL) + opsym->x.lib->value += 1; /* increment "usage count" of the library */ + } /* if */ + } /* if */ + sym=sym->next; + } /* while */ + /* restore PRI, if it was saved */ + if (savepri) + popreg(sPRI); +} + +static constvalue *insert_constval(constvalue *prev,constvalue *next,const char *name,cell val, + short index) +{ + constvalue *cur; + + if ((cur=(constvalue*)malloc(sizeof(constvalue)))==NULL) + error(103); /* insufficient memory (fatal error) */ + memset(cur,0,sizeof(constvalue)); + if (name!=NULL) { + assert(strlen(name)name,name); + } /* if */ + cur->value=val; + cur->index=index; + cur->next=next; + prev->next=cur; + return cur; +} + +SC_FUNC constvalue *append_constval(constvalue *table,const char *name,cell val,short index) +{ + constvalue *cur,*prev; + + /* find the end of the constant table */ + for (prev=table, cur=table->next; cur!=NULL; prev=cur, cur=cur->next) + /* nothing */; + return insert_constval(prev,NULL,name,val,index); +} + +SC_FUNC constvalue *find_constval(constvalue *table,char *name,short index) +{ + constvalue *ptr = table->next; + + while (ptr!=NULL) { + if (strcmp(name,ptr->name)==0 && ptr->index==index) + return ptr; + ptr=ptr->next; + } /* while */ + return NULL; +} + +static constvalue *find_constval_byval(constvalue *table,cell val) +{ + constvalue *ptr = table->next; + + while (ptr!=NULL) { + if (ptr->value==val) + return ptr; + ptr=ptr->next; + } /* while */ + return NULL; +} + +#if 0 /* never used */ +static int delete_constval(constvalue *table,char *name) +{ + constvalue *prev = table; + constvalue *cur = prev->next; + + while (cur!=NULL) { + if (strcmp(name,cur->name)==0) { + prev->next=cur->next; + free(cur); + return TRUE; + } /* if */ + prev=cur; + cur=cur->next; + } /* while */ + return FALSE; +} +#endif + +SC_FUNC void delete_consttable(constvalue *table) +{ + constvalue *cur=table->next, *next; + + while (cur!=NULL) { + next=cur->next; + free(cur); + cur=next; + } /* while */ + memset(table,0,sizeof(constvalue)); +} + +/* add_constant + * + * Adds a symbol to the #define symbol table. Returns NULL on failure. + */ +SC_FUNC symbol *add_constant(char *name,cell val,int vclass,int tag) +{ + symbol *sym; + + /* Test whether a global or local symbol with the same name exists. Since + * constants are stored in the symbols table, this also finds previously + * defind constants. */ + sym=findglb(name); + if (!sym) + sym=findloc(name); + if (sym) { + /* silently ignore redefinitions of constants with the same value */ + if (sym->ident==iCONSTEXPR) { + if (sym->addr!=val) + error(201,name); /* redefinition of constant (different value) */ + } else { + error(21,name); /* symbol already defined */ + return NULL; + } /* if */ + return sym; + } /* if */ + + /* constant doesn't exist yet, an entry must be created */ + sym=addsym(name,val,iCONSTEXPR,vclass,tag,uDEFINE); + assert(sym!=NULL); /* fatal error 103 must be given on error */ + if (sc_status == statIDLE) + sym->usage |= uPREDEF; + return sym; +} + +/* statement - The Statement Parser + * + * This routine is called whenever the parser needs to know what statement + * it encounters (i.e. whenever program syntax requires a statement). + */ +static void statement(int *lastindent,int allow_decl) +{ + int tok; + cell val; + char *st; + + if (!freading) { + error(36); /* empty statement */ + return; + } /* if */ + errorset(sRESET); + + tok=lex(&val,&st); + if (tok!='{') { + insert_dbgline(fline); + setline(TRUE); + } /* if */ + /* lex() has set stmtindent */ + if (lastindent!=NULL && tok!=tLABEL) { + if (*lastindent>=0 && *lastindent!=stmtindent && !indent_nowarn && sc_tabsize>0) + error(217); /* loose indentation */ + *lastindent=stmtindent; + indent_nowarn=FALSE; /* if warning was blocked, re-enable it */ + } /* if */ + switch (tok) { + case 0: + /* nothing */ + break; + case tNEW: + if (allow_decl) { + declloc(FALSE); + lastst=tNEW; + } else { + error(3); /* declaration only valid in a block */ + } /* if */ + break; + case tSTATIC: + if (allow_decl) { + declloc(TRUE); + lastst=tNEW; + } else { + error(3); /* declaration only valid in a block */ + } /* if */ + break; + case '{': + tok=fline; + if (!matchtoken('}')) /* {} is the empty statement */ + compound(tok==fline); + /* lastst (for "last statement") does not change */ + break; + case ';': + error(36); /* empty statement */ + break; + case tIF: + doif(); + lastst=tIF; + break; + case tWHILE: + dowhile(); + lastst=tWHILE; + break; + case tDO: + dodo(); + lastst=tDO; + break; + case tFOR: + dofor(); + lastst=tFOR; + break; + case tSWITCH: + doswitch(); + lastst=tSWITCH; + break; + case tCASE: + case tDEFAULT: + error(14); /* not in switch */ + break; + case tGOTO: + dogoto(); + lastst=tGOTO; + break; + case tLABEL: + dolabel(); + lastst=tLABEL; + break; + case tRETURN: + doreturn(); + lastst=tRETURN; + break; + case tBREAK: + dobreak(); + lastst=tBREAK; + break; + case tCONTINUE: + docont(); + lastst=tCONTINUE; + break; + case tEXIT: + doexit(); + lastst=tEXIT; + break; + case tASSERT: + doassert(); + lastst=tASSERT; + break; + case tSLEEP: + dosleep(); + lastst=tSLEEP; + break; + case tSTATE: + dostate(); + lastst=tSTATE; + break; + case tCONST: + decl_const(sLOCAL); + break; + case tENUM: + decl_enum(sLOCAL); + break; + default: /* non-empty expression */ + sc_allowproccall=optproccall; + lexpush(); /* analyze token later */ + doexpr(TRUE,TRUE,TRUE,TRUE,NULL,NULL,FALSE); + needtoken(tTERM); + lastst=tEXPR; + sc_allowproccall=FALSE; + } /* switch */ +} + +static void compound(int stmt_sameline) +{ + int indent=-1; + cell save_decl=declared; + int count_stmt=0; + + /* if there is more text on this line, we should adjust the statement indent */ + if (stmt_sameline) { + int i; + const unsigned char *p=lptr; + /* go back to the opening brace */ + while (*p!='{') { + assert(p>pline); + p--; + } /* while */ + assert(*p=='{'); /* it should be found */ + /* go forward, skipping white-space */ + p++; + while (*p<=' ' && *p!='\0') + p++; + assert(*p!='\0'); /* a token should be found */ + stmtindent=0; + for (i=0; i<(int)(p-pline); i++) + if (pline[i]=='\t' && sc_tabsize>0) + stmtindent += (int)(sc_tabsize - (stmtindent+sc_tabsize) % sc_tabsize); + else + stmtindent++; + } /* if */ + + nestlevel+=1; /* increase compound statement level */ + while (matchtoken('}')==0){ /* repeat until compound statement is closed */ + if (!freading){ + needtoken('}'); /* gives error: "expected token }" */ + break; + } else { + if (count_stmt>0 && (lastst==tRETURN || lastst==tBREAK || lastst==tCONTINUE)) + error(225); /* unreachable code */ + statement(&indent,TRUE); /* do a statement */ + count_stmt++; + } /* if */ + } /* while */ + if (lastst!=tRETURN) + destructsymbols(&loctab,nestlevel); + if (lastst!=tRETURN && lastst!=tGOTO) + modstk((int)(declared-save_decl)*sizeof(cell)); /* delete local variable space */ + testsymbols(&loctab,nestlevel,FALSE,TRUE); /* look for unused block locals */ + declared=save_decl; + delete_symbols(&loctab,nestlevel,FALSE,TRUE); /* erase local symbols, but + * retain block local labels + * (within the function) */ + nestlevel-=1; /* decrease compound statement level */ +} + +/* doexpr + * + * Global references: stgidx (referred to only) + */ +static int doexpr(int comma,int chkeffect,int allowarray,int mark_endexpr, + int *tag,symbol **symptr,int chkfuncresult) +{ + int index,ident; + int localstaging=FALSE; + cell val; + + if (!staging) { + stgset(TRUE); /* start stage-buffering */ + localstaging=TRUE; + assert(stgidx==0); + } /* if */ + index=stgidx; + errorset(sEXPRMARK); + do { + /* on second round through, mark the end of the previous expression */ + if (index!=stgidx) + markexpr(sEXPR,NULL,0); + sideeffect=FALSE; + ident=expression(&val,tag,symptr,chkfuncresult); + if (!allowarray && (ident==iARRAY || ident==iREFARRAY)) + error(33,"-unknown-"); /* array must be indexed */ + if (chkeffect && !sideeffect) + error(215); /* expression has no effect */ + sc_allowproccall=FALSE; /* cannot use "procedure call" syntax anymore */ + } while (comma && matchtoken(',')); /* more? */ + if (mark_endexpr) + markexpr(sEXPR,NULL,0); /* optionally, mark the end of the expression */ + errorset(sEXPRRELEASE); + if (localstaging) { + stgout(index); + stgset(FALSE); /* stop staging */ + } /* if */ + return ident; +} + +/* constexpr + */ +SC_FUNC int constexpr(cell *val,int *tag,symbol **symptr) +{ + int ident,index; + cell cidx; + + stgset(TRUE); /* start stage-buffering */ + stgget(&index,&cidx); /* mark position in code generator */ + errorset(sEXPRMARK); + ident=expression(val,tag,symptr,FALSE); + stgdel(index,cidx); /* scratch generated code */ + stgset(FALSE); /* stop stage-buffering */ + if (ident!=iCONSTEXPR) { + error(8); /* must be constant expression */ + if (val!=NULL) + *val=0; + if (tag!=NULL) + *tag=0; + if (symptr!=NULL) + *symptr=NULL; + } /* if */ + errorset(sEXPRRELEASE); + return (ident==iCONSTEXPR); +} + +/* test + * + * In the case a "simple assignment" operator ("=") is used within a test, + * the warning "possibly unintended assignment" is displayed. This routine + * sets the global variable "sc_intest" to true, it is restored upon termination. + * In the case the assignment was intended, use parantheses around the + * expression to avoid the warning; primary() sets "sc_intest" to 0. + * + * Global references: sc_intest (altered, but restored upon termination) + */ +static void test(int label,int parens,int invert) +{ + int index,tok; + cell cidx; + int ident,tag; + cell constval; + symbol *sym; + int localstaging=FALSE; + + if (!staging) { + stgset(TRUE); /* start staging */ + localstaging=TRUE; + #if !defined NDEBUG + stgget(&index,&cidx); /* should start at zero if started locally */ + assert(index==0); + #endif + } /* if */ + + PUSHSTK_I(sc_intest); + sc_intest=TRUE; + if (parens) + needtoken('('); + do { + stgget(&index,&cidx); /* mark position (of last expression) in + * code generator */ + ident=expression(&constval,&tag,&sym,TRUE); + tok=matchtoken(','); + if (tok) + markexpr(sEXPR,NULL,0); + } while (tok); /* do */ + if (parens) + needtoken(')'); + if (ident==iARRAY || ident==iREFARRAY) { + char *ptr=(sym->name!=NULL) ? sym->name : "-unknown-"; + error(33,ptr); /* array must be indexed */ + } /* if */ + if (ident==iCONSTEXPR) { /* constant expression */ + sc_intest=(short)POPSTK_I();/* restore stack */ + stgdel(index,cidx); + if (constval) { /* code always executed */ + error(206); /* redundant test: always non-zero */ + } else { + error(205); /* redundant code: never executed */ + jumplabel(label); + } /* if */ + if (localstaging) { + stgout(0); /* write "jumplabel" code */ + stgset(FALSE); /* stop staging */ + } /* if */ + return; + } /* if */ + if (tag!=0 && tag!=pc_addtag("bool")) + if (check_userop(lneg,tag,0,1,NULL,&tag)) + invert= !invert; /* user-defined ! operator inverted result */ + if (invert) + jmp_ne0(label); /* jump to label if true (different from 0) */ + else + jmp_eq0(label); /* jump to label if false (equal to 0) */ + markexpr(sEXPR,NULL,0); /* end expression (give optimizer a chance) */ + sc_intest=(short)POPSTK_I(); /* double typecast to avoid warning with Microsoft C */ + if (localstaging) { + stgout(0); /* output queue from the very beginning (see + * assert() when localstaging is set to TRUE) */ + stgset(FALSE); /* stop staging */ + } /* if */ +} + +static void doif(void) +{ + int flab1,flab2; + int ifindent; + + ifindent=stmtindent; /* save the indent of the "if" instruction */ + flab1=getlabel(); /* get label number for false branch */ + test(flab1,TRUE,FALSE); /* get expression, branch to flab1 if false */ + statement(NULL,FALSE); /* if true, do a statement */ + if (matchtoken(tELSE)==0){ /* if...else ? */ + setlabel(flab1); /* no, simple if..., print false label */ + } else { + /* to avoid the "dangling else" error, we want a warning if the "else" + * has a lower indent than the matching "if" */ + if (stmtindent0) + error(217); /* loose indentation */ + flab2=getlabel(); + if ((lastst!=tRETURN) && (lastst!=tGOTO)) + jumplabel(flab2); + setlabel(flab1); /* print false label */ + statement(NULL,FALSE); /* do "else" clause */ + setlabel(flab2); /* print true label */ + } /* endif */ +} + +static void dowhile(void) +{ + int wq[wqSIZE]; /* allocate local queue */ + + addwhile(wq); /* add entry to queue for "break" */ + setlabel(wq[wqLOOP]); /* loop label */ + /* The debugger uses the "line" opcode to be able to "break" out of + * a loop. To make sure that each loop has a line opcode, even for the + * tiniest loop, set it below the top of the loop + */ + setline(TRUE); + test(wq[wqEXIT],TRUE,FALSE); /* branch to wq[wqEXIT] if false */ + statement(NULL,FALSE); /* if so, do a statement */ + jumplabel(wq[wqLOOP]); /* and loop to "while" start */ + setlabel(wq[wqEXIT]); /* exit label */ + delwhile(); /* delete queue entry */ +} + +/* + * Note that "continue" will in this case not jump to the top of the loop, but + * to the end: just before the TRUE-or-FALSE testing code. + */ +static void dodo(void) +{ + int wq[wqSIZE],top; + + addwhile(wq); /* see "dowhile" for more info */ + top=getlabel(); /* make a label first */ + setlabel(top); /* loop label */ + statement(NULL,FALSE); + needtoken(tWHILE); + setlabel(wq[wqLOOP]); /* "continue" always jumps to WQLOOP. */ + setline(TRUE); + test(wq[wqEXIT],TRUE,FALSE); + jumplabel(top); + setlabel(wq[wqEXIT]); + delwhile(); + needtoken(tTERM); +} + +static void dofor(void) +{ + int wq[wqSIZE],skiplab; + cell save_decl; + int save_nestlevel,index; + int *ptr; + + save_decl=declared; + save_nestlevel=nestlevel; + + addwhile(wq); + skiplab=getlabel(); + needtoken('('); + if (matchtoken(';')==0) { + /* new variable declarations are allowed here */ + if (matchtoken(tNEW)) { + /* The variable in expr1 of the for loop is at a + * 'compound statement' level of it own. + */ + nestlevel++; + declloc(FALSE); /* declare local variable */ + } else { + doexpr(TRUE,TRUE,TRUE,TRUE,NULL,NULL,FALSE); /* expression 1 */ + needtoken(';'); + } /* if */ + } /* if */ + /* Adjust the "declared" field in the "while queue", in case that + * local variables were declared in the first expression of the + * "for" loop. These are deleted in separately, so a "break" or a "continue" + * must ignore these fields. + */ + ptr=readwhile(); + assert(ptr!=NULL); + ptr[wqBRK]=(int)declared; + ptr[wqCONT]=(int)declared; + jumplabel(skiplab); /* skip expression 3 1st time */ + setlabel(wq[wqLOOP]); /* "continue" goes to this label: expr3 */ + setline(TRUE); + /* Expressions 2 and 3 are reversed in the generated code: expression 3 + * precedes expression 2. When parsing, the code is buffered and marks for + * the start of each expression are insterted in the buffer. + */ + assert(!staging); + stgset(TRUE); /* start staging */ + assert(stgidx==0); + index=stgidx; + stgmark(sSTARTREORDER); + stgmark((char)(sEXPRSTART+0)); /* mark start of 2nd expression in stage */ + setlabel(skiplab); /* jump to this point after 1st expression */ + if (matchtoken(';')==0) { + test(wq[wqEXIT],FALSE,FALSE); /* expression 2 (jump to wq[wqEXIT] if false) */ + needtoken(';'); + } /* if */ + stgmark((char)(sEXPRSTART+1)); /* mark start of 3th expression in stage */ + if (matchtoken(')')==0) { + doexpr(TRUE,TRUE,TRUE,TRUE,NULL,NULL,FALSE); /* expression 3 */ + needtoken(')'); + } /* if */ + stgmark(sENDREORDER); /* mark end of reversed evaluation */ + stgout(index); + stgset(FALSE); /* stop staging */ + statement(NULL,FALSE); + jumplabel(wq[wqLOOP]); + setlabel(wq[wqEXIT]); + delwhile(); + + assert(nestlevel>=save_nestlevel); + if (nestlevel>save_nestlevel) { + /* Clean up the space and the symbol table for the local + * variable in "expr1". + */ + destructsymbols(&loctab,nestlevel); + modstk((int)(declared-save_decl)*sizeof(cell)); + testsymbols(&loctab,nestlevel,FALSE,TRUE); /* look for unused block locals */ + declared=save_decl; + delete_symbols(&loctab,nestlevel,FALSE,TRUE); + nestlevel=save_nestlevel; /* reset 'compound statement' nesting level */ + } /* if */ +} + +/* The switch statement is incompatible with its C sibling: + * 1. the cases are not drop through + * 2. only one instruction may appear below each case, use a compound + * instruction to execute multiple instructions + * 3. the "case" keyword accepts a comma separated list of values to + * match, it also accepts a range using the syntax "1 .. 4" + * + * SWITCH param + * PRI = expression result + * param = table offset (code segment) + * + */ +static void doswitch(void) +{ + int lbl_table,lbl_exit,lbl_case; + int tok,swdefault,casecount; + cell val; + char *str; + constvalue caselist = { NULL, "", 0, 0}; /* case list starts empty */ + constvalue *cse,*csp; + char labelname[sNAMEMAX+1]; + + needtoken('('); + doexpr(TRUE,FALSE,FALSE,FALSE,NULL,NULL,TRUE);/* evaluate switch expression */ + needtoken(')'); + /* generate the code for the switch statement, the label is the address + * of the case table (to be generated later). + */ + lbl_table=getlabel(); + lbl_case=0; /* just to avoid a compiler warning */ + ffswitch(lbl_table); + + needtoken('{'); + lbl_exit=getlabel(); /* get label number for jumping out of switch */ + swdefault=FALSE; + casecount=0; + do { + tok=lex(&val,&str); /* read in (new) token */ + switch (tok) { + case tCASE: + if (swdefault!=FALSE) + error(15); /* "default" case must be last in switch statement */ + lbl_case=getlabel(); + PUSHSTK_I(sc_allowtags); + sc_allowtags=FALSE; /* do not allow tagnames here */ + do { + casecount++; + + /* ??? enforce/document that, in a switch, a statement cannot start + * with a label. Then, you can search for: + * * the first semicolon (marks the end of a statement) + * * an opening brace (marks the start of a compound statement) + * and search for the right-most colon before that statement + * Now, by replacing the ':' by a special COLON token, you can + * parse all expressions until that special token. + */ + + constexpr(&val,NULL,NULL); + /* Search the insertion point (the table is kept in sorted order, so + * that advanced abstract machines can sift the case table with a + * binary search). Check for duplicate case values at the same time. + */ + for (csp=&caselist, cse=caselist.next; + cse!=NULL && cse->valuenext) + /* nothing */; + if (cse!=NULL && cse->value==val) + error(40,val); /* duplicate "case" label */ + /* Since the label is stored as a string in the "constvalue", the + * size of an identifier must be at least 8, as there are 8 + * hexadecimal digits in a 32-bit number. + */ + #if sNAMEMAX < 8 + #error Length of identifier (sNAMEMAX) too small. + #endif + assert(csp!=NULL); + assert(csp->next==cse); + insert_constval(csp,cse,itoh(lbl_case),val,0); + if (matchtoken(tDBLDOT)) { + cell end; + constexpr(&end,NULL,NULL); + if (end<=val) + error(50); /* invalid range */ + while (++val<=end) { + casecount++; + /* find the new insertion point */ + for (csp=&caselist, cse=caselist.next; + cse!=NULL && cse->valuenext) + /* nothing */; + if (cse!=NULL && cse->value==val) + error(40,val); /* duplicate "case" label */ + assert(csp!=NULL); + assert(csp->next==cse); + insert_constval(csp,cse,itoh(lbl_case),val,0); + } /* if */ + } /* if */ + } while (matchtoken(',')); + needtoken(':'); /* ':' ends the case */ + sc_allowtags=(short)POPSTK_I(); /* reset */ + setlabel(lbl_case); + statement(NULL,FALSE); + jumplabel(lbl_exit); + break; + case tDEFAULT: + if (swdefault!=FALSE) + error(16); /* multiple defaults in switch */ + lbl_case=getlabel(); + setlabel(lbl_case); + needtoken(':'); + swdefault=TRUE; + statement(NULL,FALSE); + /* Jump to lbl_exit, even thouh this is the last clause in the + * switch, because the jump table is generated between the last + * clause of the switch and the exit label. + */ + jumplabel(lbl_exit); + break; + case '}': + /* nothing, but avoid dropping into "default" */ + break; + default: + error(2); + indent_nowarn=TRUE; /* disable this check */ + tok='}'; /* break out of the loop after an error */ + } /* switch */ + } while (tok!='}'); + + #if !defined NDEBUG + /* verify that the case table is sorted (unfortunatly, duplicates can + * occur; there really shouldn't be duplicate cases, but the compiler + * may not crash or drop into an assertion for a user error). */ + for (cse=caselist.next; cse!=NULL && cse->next!=NULL; cse=cse->next) + assert(cse->value <= cse->next->value); + #endif + /* generate the table here, before lbl_exit (general jump target) */ + setlabel(lbl_table); + assert(swdefault==FALSE || swdefault==TRUE); + if (swdefault==FALSE) { + /* store lbl_exit as the "none-matched" label in the switch table */ + strcpy(labelname,itoh(lbl_exit)); + } else { + /* lbl_case holds the label of the "default" clause */ + strcpy(labelname,itoh(lbl_case)); + } /* if */ + ffcase(casecount,labelname,TRUE); + /* generate the rest of the table */ + for (cse=caselist.next; cse!=NULL; cse=cse->next) + ffcase(cse->value,cse->name,FALSE); + + setlabel(lbl_exit); + delete_consttable(&caselist); /* clear list of case labels */ +} + +static void doassert(void) +{ + int flab1,index; + cell cidx; + + if ((sc_debug & sCHKBOUNDS)!=0) { + flab1=getlabel(); /* get label number for "OK" branch */ + test(flab1,FALSE,TRUE); /* get expression and branch to flab1 if true */ + insert_dbgline(fline); /* make sure we can find the correct line number */ + ffabort(xASSERTION); + setlabel(flab1); + } else { + stgset(TRUE); /* start staging */ + stgget(&index,&cidx); /* mark position in code generator */ + do { + expression(NULL,NULL,NULL,FALSE); + stgdel(index,cidx); /* just scrap the code */ + } while (matchtoken(',')); + stgset(FALSE); /* stop staging */ + } /* if */ + needtoken(tTERM); +} + +static void dogoto(void) +{ + char *st; + cell val; + symbol *sym; + + if (lex(&val,&st)==tSYMBOL) { + sym=fetchlab(st); + jumplabel((int)sym->addr); + sym->usage|=uREAD; /* set "uREAD" bit */ + // ??? if the label is defined (check sym->usage & uDEFINE), check + // sym->compound (nesting level of the label) against nestlevel; + // if sym->compound < nestlevel, call the destructor operator + } else { + error(20,st); /* illegal symbol name */ + } /* if */ + needtoken(tTERM); +} + +static void dolabel(void) +{ + char *st; + cell val; + symbol *sym; + + tokeninfo(&val,&st); /* retrieve label name again */ + if (find_constval(&tagname_tab,st,0)!=NULL) + error(221,st); /* label name shadows tagname */ + sym=fetchlab(st); + setlabel((int)sym->addr); + /* since one can jump around variable declarations or out of compound + * blocks, the stack must be manually adjusted + */ + setstk(-declared*sizeof(cell)); + sym->usage|=uDEFINE; /* label is now defined */ +} + +/* fetchlab + * + * Finds a label from the (local) symbol table or adds one to it. + * Labels are local in scope. + * + * Note: The "_usage" bit is set to zero. The routines that call "fetchlab()" + * must set this bit accordingly. + */ +static symbol *fetchlab(char *name) +{ + symbol *sym; + + sym=findloc(name); /* labels are local in scope */ + if (sym){ + if (sym->ident!=iLABEL) + error(19,sym->name); /* not a label: ... */ + } else { + sym=addsym(name,getlabel(),iLABEL,sLOCAL,0,0); + assert(sym!=NULL); /* fatal error 103 must be given on error */ + sym->x.declared=(int)declared; + sym->compound=nestlevel; + } /* if */ + return sym; +} + +static int is_variadic(symbol *sym) +{ + arginfo *arg; + + assert(sym->ident==iFUNCTN); + for (arg = sym->dim.arglist; arg->ident; arg++) { + if (arg->ident == iVARARGS) + return TRUE; + } + return FALSE; +} + +/* doreturn + * + * Global references: rettype (altered) + */ +static void doreturn(void) +{ + int tag,ident; + int level; + symbol *sym,*sub; + + if (!matchtoken(tTERM)) { + /* "return " */ + if ((rettype & uRETNONE)!=0) + error(78); /* mix "return;" and "return value;" */ + ident=doexpr(TRUE,FALSE,TRUE,TRUE,&tag,&sym,TRUE); + needtoken(tTERM); + /* see if this function already has a sub type (an array attached) */ + sub=finddepend(curfunc); + assert(sub==NULL || sub->ident==iREFARRAY); + if ((rettype & uRETVALUE)!=0) { + int retarray=(ident==iARRAY || ident==iREFARRAY); + /* there was an earlier "return" statement in this function */ + if ((sub==NULL && retarray) || (sub!=NULL && !retarray)) + error(79); /* mixing "return array;" and "return value;" */ + } /* if */ + rettype|=uRETVALUE; /* function returns a value */ + /* check tagname with function tagname */ + assert(curfunc!=NULL); + if (!matchtag(curfunc->tag,tag,TRUE)) + error(213); /* tagname mismatch */ + if (ident==iARRAY || ident==iREFARRAY) { + int dim[sDIMEN_MAX],numdim=0; + cell arraysize; + assert(sym!=NULL); + if (sub!=NULL) { + assert(sub->ident==iREFARRAY); + /* this function has an array attached already; check that the current + * "return" statement returns exactly the same array + */ + level=sym->dim.array.level; + if (sub->dim.array.level!=level) { + error(48); /* array dimensions must match */ + } else { + for (numdim=0; numdim<=level; numdim++) { + dim[numdim]=(int)sub->dim.array.length; + if (sym->dim.array.length!=dim[numdim]) + error(47); /* array sizes must match */ + if (numdimdim.array.level; + for (numdim=0; numdim<=level; numdim++) { + dim[numdim]=(int)sub->dim.array.length; + idxtag[numdim]=sub->x.idxtag; + if (numdimname); + } /* for */ + /* the address of the array is stored in a hidden parameter; the address + * of this parameter is 1 + the number of parameters (times the size of + * a cell) + the size of the stack frame and the return address + * base + 0*sizeof(cell) == previous "base" + * base + 1*sizeof(cell) == function return address + * base + 2*sizeof(cell) == number of arguments + * base + 3*sizeof(cell) == first argument of the function + * ... + * base + ((n-1)+3)*sizeof(cell) == last argument of the function + * base + (n+3)*sizeof(cell) == hidden parameter with array address + */ + assert(curfunc!=NULL); + assert(curfunc->dim.arglist!=NULL); + for (argcount=0; curfunc->dim.arglist[argcount].ident!=0; argcount++) + /* nothing */; + sub=addvariable(curfunc->name,(argcount+3)*sizeof(cell),iREFARRAY,sGLOBAL,curfunc->tag,dim,numdim,idxtag); + sub->parent=curfunc; + } /* if */ + /* get the hidden parameter, copy the array (the array is on the heap; + * it stays on the heap for the moment, and it is removed -usually- at + * the end of the expression/statement, see expression() in SC3.C) + */ + if (is_variadic(curfunc)) { + load_hidden_arg(); + } else { address(sub,sALT); /* ALT = destination */ - } - arraysize=calc_arraysize(dim,numdim,0); - memcopy(arraysize*sizeof(cell)); /* source already in PRI */ - /* moveto1(); is not necessary, callfunction() does a popreg() */ - } /* if */ - } else { - /* this return statement contains no expression */ - ldconst(0,sPRI); - if ((rettype & uRETVALUE)!=0) { - char symname[2*sNAMEMAX+16]; /* allow space for user defined operators */ - assert(curfunc!=NULL); - funcdisplayname(symname,curfunc->name); - error(209,symname); /* function should return a value */ - } /* if */ - rettype|=uRETNONE; /* function does not return anything */ - } /* if */ - destructsymbols(&loctab,0); /* call destructor for *all* locals */ - modstk((int)declared*sizeof(cell)); /* end of function, remove *all* - * local variables */ - ffret(); -} - -static void dobreak(void) -{ - int *ptr; - - ptr=readwhile(); /* readwhile() gives an error if not in loop */ - needtoken(tTERM); - if (ptr==NULL) - return; - destructsymbols(&loctab,nestlevel); - modstk(((int)declared-ptr[wqBRK])*sizeof(cell)); - jumplabel(ptr[wqEXIT]); -} - -static void docont(void) -{ - int *ptr; - - ptr=readwhile(); /* readwhile() gives an error if not in loop */ - needtoken(tTERM); - if (ptr==NULL) - return; - destructsymbols(&loctab,nestlevel); - modstk(((int)declared-ptr[wqCONT])*sizeof(cell)); - jumplabel(ptr[wqLOOP]); -} - -SC_FUNC void exporttag(int tag) -{ - /* find the tag by value in the table, then set the top bit to mark it - * "public" - */ - if (tag!=0 && (tag & PUBLICTAG)==0) { - constvalue *ptr; - for (ptr=tagname_tab.next; ptr!=NULL && tag!=(int)(ptr->value & TAGMASK); ptr=ptr->next) - /* nothing */; - if (ptr!=NULL) - ptr->value |= PUBLICTAG; - } /* if */ -} - -static void doexit(void) -{ - int tag=0; - - if (matchtoken(tTERM)==0){ - doexpr(TRUE,FALSE,FALSE,TRUE,&tag,NULL,TRUE); - needtoken(tTERM); - } else { - ldconst(0,sPRI); - } /* if */ - ldconst(tag,sALT); - exporttag(tag); - destructsymbols(&loctab,0); /* call destructor for *all* locals */ - ffabort(xEXIT); -} - -static void dosleep(void) -{ - int tag=0; - - if (matchtoken(tTERM)==0){ - doexpr(TRUE,FALSE,FALSE,TRUE,&tag,NULL,TRUE); - needtoken(tTERM); - } else { - ldconst(0,sPRI); - } /* if */ - ldconst(tag,sALT); - exporttag(tag); - ffabort(xSLEEP); -} - -static void dostate(void) -{ - char name[sNAMEMAX+1]; - cell val; - char *str; - constvalue *automaton; - constvalue *state; - constvalue *stlist; - int fsa,flabel; - int islabel; - symbol *sym; - #if !defined SC_LIGHT - int length,index,listid,listindex,stateindex; - char *doc; - #endif - - /* check for an optional condition */ - if (matchtoken('(')) { - flabel=getlabel(); /* get label number for "false" branch */ - pc_docexpr=TRUE; /* attach expression as a documentation string */ - test(flabel,FALSE,FALSE); /* get expression, branch to flabel if false */ - pc_docexpr=FALSE; - needtoken(')'); - } else { - flabel=-1; - } /* if */ - - fsa=0; - - if (!(islabel=matchtoken(tLABEL)) && !needtoken(tSYMBOL)) { - delete_autolisttable(); - return; - } /* if */ - tokeninfo(&val,&str); - assert(strlen(str)index; - if (!needtoken(tSYMBOL)) { - delete_autolisttable(); - return; - } /* if */ - tokeninfo(&val,&str); - assert(strlen(str)name; - if (*fsaname=='\0') - fsaname="

"; - error(87,name,fsaname); /* unknown state for automaton */ - } else { - ldconst(state->value,sPRI); - storereg(automaton->value,sPRI); - /* find the optional entry() function for the state */ - sym=findglb(uENTRYFUNC); - if (sc_status==statWRITE && sym!=NULL && sym->ident==iFUNCTN && sym->states!=NULL) { - for (stlist=sym->states->next; stlist!=NULL; stlist=stlist->next) { - assert(strlen(stlist->name)!=0); - if (state_getfsa(stlist->index)==fsa && state_inlist(stlist->index,(int)state->value)) - break; /* found! */ - } /* for */ - assert(stlist==NULL || state_inlist(stlist->index,state->value)); - if (stlist!=NULL) { - /* the label to jump to is in stlist->name */ - ffcall(sym,stlist->name,0); - } /* if */ - } /* if */ - } /* if */ - } /* if */ - needtoken(tTERM); - - if (flabel>=0) - setlabel(flabel); /* condition was false, jump around the state switch */ - - #if !defined SC_LIGHT - /* mark for documentation */ - if (sc_status==statFIRST) { - /* get the last list id attached to the function, this contains the source states */ - assert(curfunc!=NULL); - if (curfunc->states!=NULL) { - stlist=curfunc->states->next; - assert(stlist!=NULL); - while (stlist->next!=NULL) - stlist=stlist->next; - listid=stlist->index; - } else { - listid=-1; - } /* if */ - listindex=0; - length=strlen(name)+70; /* +70 for the fixed part "\n" */ - /* see if there are any condition strings to attach */ - for (index=0; (str=get_autolist(index))!=NULL; index++) - length+=strlen(str); - if ((doc=(char*)malloc(length*sizeof(char)))!=NULL) { - do { - sprintf(doc,"=0) { - /* get the source state */ - stateindex=state_listitem(listid,listindex); - state=state_findid(stateindex); - assert(state!=NULL); - sprintf(doc+strlen(doc)," source=\"%s\"",state->name); - } /* if */ - if (get_autolist(0)!=NULL) { - /* add the condition */ - strcat(doc," condition=\""); - for (index=0; (str=get_autolist(index))!=NULL; index++) { - /* remove the ')' token that may be appended before detecting that the expression has ended */ - if (*str!=')' || *(str+1)!='\0' || get_autolist(index+1)!=NULL) - strcat(doc,str); - } /* for */ - strcat(doc,"\""); - } /* if */ - strcat(doc,"/>\n"); - insert_docstring(doc); - } while (listid>=0 && ++listindex=(wq+wqTABSZ-wqSIZE)) - error(102,"loop table"); /* loop table overflow (too many active loops)*/ - k=0; - while (kwq) - wqptr-=wqSIZE; -} - -static int *readwhile(void) -{ - if (wqptr<=wq){ - error(24); /* out of context */ - return NULL; - } else { - return (wqptr-wqSIZE); - } /* if */ -} - + } + arraysize=calc_arraysize(dim,numdim,0); + memcopy(arraysize*sizeof(cell)); /* source already in PRI */ + /* moveto1(); is not necessary, callfunction() does a popreg() */ + } /* if */ + } else { + /* this return statement contains no expression */ + ldconst(0,sPRI); + if ((rettype & uRETVALUE)!=0) { + char symname[2*sNAMEMAX+16]; /* allow space for user defined operators */ + assert(curfunc!=NULL); + funcdisplayname(symname,curfunc->name); + error(209,symname); /* function should return a value */ + } /* if */ + rettype|=uRETNONE; /* function does not return anything */ + } /* if */ + destructsymbols(&loctab,0); /* call destructor for *all* locals */ + modstk((int)declared*sizeof(cell)); /* end of function, remove *all* + * local variables */ + ffret(); +} + +static void dobreak(void) +{ + int *ptr; + + ptr=readwhile(); /* readwhile() gives an error if not in loop */ + needtoken(tTERM); + if (ptr==NULL) + return; + destructsymbols(&loctab,nestlevel); + modstk(((int)declared-ptr[wqBRK])*sizeof(cell)); + jumplabel(ptr[wqEXIT]); +} + +static void docont(void) +{ + int *ptr; + + ptr=readwhile(); /* readwhile() gives an error if not in loop */ + needtoken(tTERM); + if (ptr==NULL) + return; + destructsymbols(&loctab,nestlevel); + modstk(((int)declared-ptr[wqCONT])*sizeof(cell)); + jumplabel(ptr[wqLOOP]); +} + +SC_FUNC void exporttag(int tag) +{ + /* find the tag by value in the table, then set the top bit to mark it + * "public" + */ + if (tag!=0 && (tag & PUBLICTAG)==0) { + constvalue *ptr; + for (ptr=tagname_tab.next; ptr!=NULL && tag!=(int)(ptr->value & TAGMASK); ptr=ptr->next) + /* nothing */; + if (ptr!=NULL) + ptr->value |= PUBLICTAG; + } /* if */ +} + +static void doexit(void) +{ + int tag=0; + + if (matchtoken(tTERM)==0){ + doexpr(TRUE,FALSE,FALSE,TRUE,&tag,NULL,TRUE); + needtoken(tTERM); + } else { + ldconst(0,sPRI); + } /* if */ + ldconst(tag,sALT); + exporttag(tag); + destructsymbols(&loctab,0); /* call destructor for *all* locals */ + ffabort(xEXIT); +} + +static void dosleep(void) +{ + int tag=0; + + if (matchtoken(tTERM)==0){ + doexpr(TRUE,FALSE,FALSE,TRUE,&tag,NULL,TRUE); + needtoken(tTERM); + } else { + ldconst(0,sPRI); + } /* if */ + ldconst(tag,sALT); + exporttag(tag); + ffabort(xSLEEP); +} + +static void dostate(void) +{ + char name[sNAMEMAX+1]; + cell val; + char *str; + constvalue *automaton; + constvalue *state; + constvalue *stlist; + int fsa,flabel; + int islabel; + symbol *sym; + #if !defined SC_LIGHT + int length,index,listid,listindex,stateindex; + char *doc; + #endif + + /* check for an optional condition */ + if (matchtoken('(')) { + flabel=getlabel(); /* get label number for "false" branch */ + pc_docexpr=TRUE; /* attach expression as a documentation string */ + test(flabel,FALSE,FALSE); /* get expression, branch to flabel if false */ + pc_docexpr=FALSE; + needtoken(')'); + } else { + flabel=-1; + } /* if */ + + fsa=0; + + if (!(islabel=matchtoken(tLABEL)) && !needtoken(tSYMBOL)) { + delete_autolisttable(); + return; + } /* if */ + tokeninfo(&val,&str); + assert(strlen(str)index; + if (!needtoken(tSYMBOL)) { + delete_autolisttable(); + return; + } /* if */ + tokeninfo(&val,&str); + assert(strlen(str)name; + if (*fsaname=='\0') + fsaname="
"; + error(87,name,fsaname); /* unknown state for automaton */ + } else { + ldconst(state->value,sPRI); + storereg(automaton->value,sPRI); + /* find the optional entry() function for the state */ + sym=findglb(uENTRYFUNC); + if (sc_status==statWRITE && sym!=NULL && sym->ident==iFUNCTN && sym->states!=NULL) { + for (stlist=sym->states->next; stlist!=NULL; stlist=stlist->next) { + assert(strlen(stlist->name)!=0); + if (state_getfsa(stlist->index)==fsa && state_inlist(stlist->index,(int)state->value)) + break; /* found! */ + } /* for */ + assert(stlist==NULL || state_inlist(stlist->index,state->value)); + if (stlist!=NULL) { + /* the label to jump to is in stlist->name */ + ffcall(sym,stlist->name,0); + } /* if */ + } /* if */ + } /* if */ + } /* if */ + needtoken(tTERM); + + if (flabel>=0) + setlabel(flabel); /* condition was false, jump around the state switch */ + + #if !defined SC_LIGHT + /* mark for documentation */ + if (sc_status==statFIRST) { + /* get the last list id attached to the function, this contains the source states */ + assert(curfunc!=NULL); + if (curfunc->states!=NULL) { + stlist=curfunc->states->next; + assert(stlist!=NULL); + while (stlist->next!=NULL) + stlist=stlist->next; + listid=stlist->index; + } else { + listid=-1; + } /* if */ + listindex=0; + length=strlen(name)+70; /* +70 for the fixed part "\n" */ + /* see if there are any condition strings to attach */ + for (index=0; (str=get_autolist(index))!=NULL; index++) + length+=strlen(str); + if ((doc=(char*)malloc(length*sizeof(char)))!=NULL) { + do { + sprintf(doc,"=0) { + /* get the source state */ + stateindex=state_listitem(listid,listindex); + state=state_findid(stateindex); + assert(state!=NULL); + sprintf(doc+strlen(doc)," source=\"%s\"",state->name); + } /* if */ + if (get_autolist(0)!=NULL) { + /* add the condition */ + strcat(doc," condition=\""); + for (index=0; (str=get_autolist(index))!=NULL; index++) { + /* remove the ')' token that may be appended before detecting that the expression has ended */ + if (*str!=')' || *(str+1)!='\0' || get_autolist(index+1)!=NULL) + strcat(doc,str); + } /* for */ + strcat(doc,"\""); + } /* if */ + strcat(doc,"/>\n"); + insert_docstring(doc); + } while (listid>=0 && ++listindex=(wq+wqTABSZ-wqSIZE)) + error(102,"loop table"); /* loop table overflow (too many active loops)*/ + k=0; + while (kwq) + wqptr-=wqSIZE; +} + +static int *readwhile(void) +{ + if (wqptr<=wq){ + error(24); /* out of context */ + return NULL; + } else { + return (wqptr-wqSIZE); + } /* if */ +} +