863 lines
29 KiB
C
863 lines
29 KiB
C
/*
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** The "printf" code that follows dates from the 1980's. It is in
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** the public domain. The original comments are included here for
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** completeness. They are very out-of-date but might be useful as
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** an historical reference. Most of the "enhancements" have been backed
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** out so that the functionality is now the same as standard printf().
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**
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**************************************************************************
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**
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** The following modules is an enhanced replacement for the "printf" subroutines
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** found in the standard C library. The following enhancements are
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** supported:
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**
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** + Additional functions. The standard set of "printf" functions
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** includes printf, fprintf, sprintf, vprintf, vfprintf, and
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** vsprintf. This module adds the following:
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**
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** * snprintf -- Works like sprintf, but has an extra argument
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** which is the size of the buffer written to.
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**
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** * mprintf -- Similar to sprintf. Writes output to memory
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** obtained from malloc.
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**
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** * xprintf -- Calls a function to dispose of output.
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**
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** * nprintf -- No output, but returns the number of characters
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** that would have been output by printf.
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**
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** * A v- version (ex: vsnprintf) of every function is also
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** supplied.
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**
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** + A few extensions to the formatting notation are supported:
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**
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** * The "=" flag (similar to "-") causes the output to be
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** be centered in the appropriately sized field.
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**
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** * The %b field outputs an integer in binary notation.
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**
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** * The %c field now accepts a precision. The character output
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** is repeated by the number of times the precision specifies.
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**
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** * The %' field works like %c, but takes as its character the
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** next character of the format string, instead of the next
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** argument. For example, printf("%.78'-") prints 78 minus
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** signs, the same as printf("%.78c",'-').
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**
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** + When compiled using GCC on a SPARC, this version of printf is
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** faster than the library printf for SUN OS 4.1.
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**
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** + All functions are fully reentrant.
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**
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*/
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#include "sqliteInt.h"
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/*
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** Conversion types fall into various categories as defined by the
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** following enumeration.
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*/
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#define etRADIX 1 /* Integer types. %d, %x, %o, and so forth */
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#define etFLOAT 2 /* Floating point. %f */
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#define etEXP 3 /* Exponentional notation. %e and %E */
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#define etGENERIC 4 /* Floating or exponential, depending on exponent. %g */
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#define etSIZE 5 /* Return number of characters processed so far. %n */
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#define etSTRING 6 /* Strings. %s */
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#define etDYNSTRING 7 /* Dynamically allocated strings. %z */
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#define etPERCENT 8 /* Percent symbol. %% */
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#define etCHARX 9 /* Characters. %c */
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/* The rest are extensions, not normally found in printf() */
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#define etCHARLIT 10 /* Literal characters. %' */
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#define etSQLESCAPE 11 /* Strings with '\'' doubled. %q */
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#define etSQLESCAPE2 12 /* Strings with '\'' doubled and enclosed in '',
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NULL pointers replaced by SQL NULL. %Q */
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#define etTOKEN 13 /* a pointer to a Token structure */
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#define etSRCLIST 14 /* a pointer to a SrcList */
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#define etPOINTER 15 /* The %p conversion */
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/*
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** An "etByte" is an 8-bit unsigned value.
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*/
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typedef unsigned char etByte;
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/*
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** Each builtin conversion character (ex: the 'd' in "%d") is described
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** by an instance of the following structure
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*/
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typedef struct et_info { /* Information about each format field */
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char fmttype; /* The format field code letter */
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etByte base; /* The base for radix conversion */
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etByte flags; /* One or more of FLAG_ constants below */
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etByte type; /* Conversion paradigm */
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etByte charset; /* Offset into aDigits[] of the digits string */
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etByte prefix; /* Offset into aPrefix[] of the prefix string */
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} et_info;
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/*
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** Allowed values for et_info.flags
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*/
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#define FLAG_SIGNED 1 /* True if the value to convert is signed */
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#define FLAG_INTERN 2 /* True if for internal use only */
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#define FLAG_STRING 4 /* Allow infinity precision */
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/*
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** The following table is searched linearly, so it is good to put the
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** most frequently used conversion types first.
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*/
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static const char aDigits[] = "0123456789ABCDEF0123456789abcdef";
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static const char aPrefix[] = "-x0\000X0";
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static const et_info fmtinfo[] = {
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{ 'd', 10, 1, etRADIX, 0, 0 },
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{ 's', 0, 4, etSTRING, 0, 0 },
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{ 'g', 0, 1, etGENERIC, 30, 0 },
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{ 'z', 0, 6, etDYNSTRING, 0, 0 },
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{ 'q', 0, 4, etSQLESCAPE, 0, 0 },
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{ 'Q', 0, 4, etSQLESCAPE2, 0, 0 },
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{ 'c', 0, 0, etCHARX, 0, 0 },
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{ 'o', 8, 0, etRADIX, 0, 2 },
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{ 'u', 10, 0, etRADIX, 0, 0 },
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{ 'x', 16, 0, etRADIX, 16, 1 },
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{ 'X', 16, 0, etRADIX, 0, 4 },
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#ifndef SQLITE_OMIT_FLOATING_POINT
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{ 'f', 0, 1, etFLOAT, 0, 0 },
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{ 'e', 0, 1, etEXP, 30, 0 },
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{ 'E', 0, 1, etEXP, 14, 0 },
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{ 'G', 0, 1, etGENERIC, 14, 0 },
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#endif
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{ 'i', 10, 1, etRADIX, 0, 0 },
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{ 'n', 0, 0, etSIZE, 0, 0 },
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{ '%', 0, 0, etPERCENT, 0, 0 },
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{ 'p', 16, 0, etPOINTER, 0, 1 },
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{ 'T', 0, 2, etTOKEN, 0, 0 },
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{ 'S', 0, 2, etSRCLIST, 0, 0 },
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};
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#define etNINFO (sizeof(fmtinfo)/sizeof(fmtinfo[0]))
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/*
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** If SQLITE_OMIT_FLOATING_POINT is defined, then none of the floating point
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** conversions will work.
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*/
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#ifndef SQLITE_OMIT_FLOATING_POINT
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/*
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** "*val" is a double such that 0.1 <= *val < 10.0
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** Return the ascii code for the leading digit of *val, then
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** multiply "*val" by 10.0 to renormalize.
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**
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** Example:
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** input: *val = 3.14159
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** output: *val = 1.4159 function return = '3'
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**
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** The counter *cnt is incremented each time. After counter exceeds
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** 16 (the number of significant digits in a 64-bit float) '0' is
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** always returned.
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*/
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static int et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){
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int digit;
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LONGDOUBLE_TYPE d;
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if( (*cnt)++ >= 16 ) return '0';
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digit = (int)*val;
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d = digit;
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digit += '0';
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*val = (*val - d)*10.0;
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return digit;
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}
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#endif /* SQLITE_OMIT_FLOATING_POINT */
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/*
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** On machines with a small stack size, you can redefine the
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** SQLITE_PRINT_BUF_SIZE to be less than 350. But beware - for
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** smaller values some %f conversions may go into an infinite loop.
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*/
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#ifndef SQLITE_PRINT_BUF_SIZE
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# define SQLITE_PRINT_BUF_SIZE 350
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#endif
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#define etBUFSIZE SQLITE_PRINT_BUF_SIZE /* Size of the output buffer */
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/*
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** The root program. All variations call this core.
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**
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** INPUTS:
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** func This is a pointer to a function taking three arguments
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** 1. A pointer to anything. Same as the "arg" parameter.
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** 2. A pointer to the list of characters to be output
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** (Note, this list is NOT null terminated.)
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** 3. An integer number of characters to be output.
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** (Note: This number might be zero.)
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**
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** arg This is the pointer to anything which will be passed as the
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** first argument to "func". Use it for whatever you like.
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**
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** fmt This is the format string, as in the usual print.
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**
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** ap This is a pointer to a list of arguments. Same as in
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** vfprint.
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**
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** OUTPUTS:
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** The return value is the total number of characters sent to
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** the function "func". Returns -1 on a error.
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**
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** Note that the order in which automatic variables are declared below
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** seems to make a big difference in determining how fast this beast
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** will run.
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*/
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static int vxprintf(
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void (*func)(void*,const char*,int), /* Consumer of text */
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void *arg, /* First argument to the consumer */
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int useExtended, /* Allow extended %-conversions */
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const char *fmt, /* Format string */
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va_list ap /* arguments */
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){
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int c; /* Next character in the format string */
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char *bufpt; /* Pointer to the conversion buffer */
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int precision; /* Precision of the current field */
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int length; /* Length of the field */
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int idx; /* A general purpose loop counter */
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int count; /* Total number of characters output */
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int width; /* Width of the current field */
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etByte flag_leftjustify; /* True if "-" flag is present */
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etByte flag_plussign; /* True if "+" flag is present */
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etByte flag_blanksign; /* True if " " flag is present */
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etByte flag_alternateform; /* True if "#" flag is present */
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etByte flag_altform2; /* True if "!" flag is present */
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etByte flag_zeropad; /* True if field width constant starts with zero */
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etByte flag_long; /* True if "l" flag is present */
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etByte flag_longlong; /* True if the "ll" flag is present */
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etByte done; /* Loop termination flag */
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sqlite_uint64 longvalue; /* Value for integer types */
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LONGDOUBLE_TYPE realvalue; /* Value for real types */
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const et_info *infop; /* Pointer to the appropriate info structure */
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char buf[etBUFSIZE]; /* Conversion buffer */
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char prefix; /* Prefix character. "+" or "-" or " " or '\0'. */
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etByte errorflag = 0; /* True if an error is encountered */
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etByte xtype; /* Conversion paradigm */
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char *zExtra; /* Extra memory used for etTCLESCAPE conversions */
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static const char spaces[] =
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" ";
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#define etSPACESIZE (sizeof(spaces)-1)
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#ifndef SQLITE_OMIT_FLOATING_POINT
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int exp, e2; /* exponent of real numbers */
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double rounder; /* Used for rounding floating point values */
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etByte flag_dp; /* True if decimal point should be shown */
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etByte flag_rtz; /* True if trailing zeros should be removed */
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etByte flag_exp; /* True to force display of the exponent */
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int nsd; /* Number of significant digits returned */
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#endif
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func(arg,"",0);
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count = length = 0;
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bufpt = 0;
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for(; (c=(*fmt))!=0; ++fmt){
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if( c!='%' ){
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int amt;
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bufpt = (char *)fmt;
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amt = 1;
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while( (c=(*++fmt))!='%' && c!=0 ) amt++;
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(*func)(arg,bufpt,amt);
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count += amt;
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if( c==0 ) break;
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}
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if( (c=(*++fmt))==0 ){
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errorflag = 1;
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(*func)(arg,"%",1);
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count++;
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break;
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}
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/* Find out what flags are present */
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flag_leftjustify = flag_plussign = flag_blanksign =
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flag_alternateform = flag_altform2 = flag_zeropad = 0;
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done = 0;
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do{
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switch( c ){
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case '-': flag_leftjustify = 1; break;
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case '+': flag_plussign = 1; break;
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case ' ': flag_blanksign = 1; break;
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case '#': flag_alternateform = 1; break;
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case '!': flag_altform2 = 1; break;
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case '0': flag_zeropad = 1; break;
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default: done = 1; break;
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}
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}while( !done && (c=(*++fmt))!=0 );
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/* Get the field width */
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width = 0;
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if( c=='*' ){
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width = va_arg(ap,int);
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if( width<0 ){
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flag_leftjustify = 1;
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width = -width;
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}
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c = *++fmt;
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}else{
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while( c>='0' && c<='9' ){
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width = width*10 + c - '0';
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c = *++fmt;
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}
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}
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if( width > etBUFSIZE-10 ){
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width = etBUFSIZE-10;
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}
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/* Get the precision */
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if( c=='.' ){
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precision = 0;
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c = *++fmt;
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if( c=='*' ){
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precision = va_arg(ap,int);
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if( precision<0 ) precision = -precision;
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c = *++fmt;
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}else{
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while( c>='0' && c<='9' ){
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precision = precision*10 + c - '0';
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c = *++fmt;
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}
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}
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}else{
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precision = -1;
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}
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/* Get the conversion type modifier */
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if( c=='l' ){
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flag_long = 1;
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c = *++fmt;
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if( c=='l' ){
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flag_longlong = 1;
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c = *++fmt;
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}else{
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flag_longlong = 0;
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}
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}else{
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flag_long = flag_longlong = 0;
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}
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/* Fetch the info entry for the field */
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infop = 0;
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for(idx=0; idx<etNINFO; idx++){
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if( c==fmtinfo[idx].fmttype ){
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infop = &fmtinfo[idx];
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if( useExtended || (infop->flags & FLAG_INTERN)==0 ){
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xtype = infop->type;
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}
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break;
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}
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}
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zExtra = 0;
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if( infop==0 ){
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return -1;
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}
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/* Limit the precision to prevent overflowing buf[] during conversion */
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if( precision>etBUFSIZE-40 && (infop->flags & FLAG_STRING)==0 ){
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precision = etBUFSIZE-40;
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}
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/*
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** At this point, variables are initialized as follows:
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**
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** flag_alternateform TRUE if a '#' is present.
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** flag_altform2 TRUE if a '!' is present.
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** flag_plussign TRUE if a '+' is present.
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** flag_leftjustify TRUE if a '-' is present or if the
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** field width was negative.
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** flag_zeropad TRUE if the width began with 0.
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** flag_long TRUE if the letter 'l' (ell) prefixed
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** the conversion character.
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** flag_longlong TRUE if the letter 'll' (ell ell) prefixed
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** the conversion character.
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** flag_blanksign TRUE if a ' ' is present.
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** width The specified field width. This is
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** always non-negative. Zero is the default.
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** precision The specified precision. The default
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** is -1.
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** xtype The class of the conversion.
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** infop Pointer to the appropriate info struct.
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*/
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switch( xtype ){
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case etPOINTER:
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flag_longlong = sizeof(char*)==sizeof(i64);
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flag_long = sizeof(char*)==sizeof(long int);
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/* Fall through into the next case */
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case etRADIX:
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if( infop->flags & FLAG_SIGNED ){
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i64 v;
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if( flag_longlong ) v = va_arg(ap,i64);
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else if( flag_long ) v = va_arg(ap,long int);
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else v = va_arg(ap,int);
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if( v<0 ){
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longvalue = -v;
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prefix = '-';
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}else{
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longvalue = v;
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if( flag_plussign ) prefix = '+';
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else if( flag_blanksign ) prefix = ' ';
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else prefix = 0;
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}
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}else{
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if( flag_longlong ) longvalue = va_arg(ap,u64);
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else if( flag_long ) longvalue = va_arg(ap,unsigned long int);
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else longvalue = va_arg(ap,unsigned int);
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prefix = 0;
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}
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if( longvalue==0 ) flag_alternateform = 0;
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if( flag_zeropad && precision<width-(prefix!=0) ){
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precision = width-(prefix!=0);
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}
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bufpt = &buf[etBUFSIZE-1];
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{
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register const char *cset; /* Use registers for speed */
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register int base;
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cset = &aDigits[infop->charset];
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base = infop->base;
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do{ /* Convert to ascii */
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*(--bufpt) = cset[longvalue%base];
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longvalue = longvalue/base;
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}while( longvalue>0 );
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}
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length = &buf[etBUFSIZE-1]-bufpt;
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for(idx=precision-length; idx>0; idx--){
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*(--bufpt) = '0'; /* Zero pad */
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}
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if( prefix ) *(--bufpt) = prefix; /* Add sign */
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if( flag_alternateform && infop->prefix ){ /* Add "0" or "0x" */
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const char *pre;
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char x;
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pre = &aPrefix[infop->prefix];
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if( *bufpt!=pre[0] ){
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for(; (x=(*pre))!=0; pre++) *(--bufpt) = x;
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}
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}
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length = &buf[etBUFSIZE-1]-bufpt;
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break;
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case etFLOAT:
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case etEXP:
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case etGENERIC:
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realvalue = va_arg(ap,double);
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#ifndef SQLITE_OMIT_FLOATING_POINT
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if( precision<0 ) precision = 6; /* Set default precision */
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if( precision>etBUFSIZE/2-10 ) precision = etBUFSIZE/2-10;
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if( realvalue<0.0 ){
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realvalue = -realvalue;
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prefix = '-';
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}else{
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if( flag_plussign ) prefix = '+';
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else if( flag_blanksign ) prefix = ' ';
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else prefix = 0;
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}
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if( xtype==etGENERIC && precision>0 ) precision--;
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#if 0
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/* Rounding works like BSD when the constant 0.4999 is used. Wierd! */
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for(idx=precision, rounder=0.4999; idx>0; idx--, rounder*=0.1);
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#else
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/* It makes more sense to use 0.5 */
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for(idx=precision, rounder=0.5; idx>0; idx--, rounder*=0.1){}
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#endif
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if( xtype==etFLOAT ) realvalue += rounder;
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/* Normalize realvalue to within 10.0 > realvalue >= 1.0 */
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exp = 0;
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if( realvalue>0.0 ){
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while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; }
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while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
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while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
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while( realvalue<1e-8 && exp>=-350 ){ realvalue *= 1e8; exp-=8; }
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while( realvalue<1.0 && exp>=-350 ){ realvalue *= 10.0; exp--; }
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if( exp>350 || exp<-350 ){
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bufpt = "NaN";
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length = 3;
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break;
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}
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}
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bufpt = buf;
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/*
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** If the field type is etGENERIC, then convert to either etEXP
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** or etFLOAT, as appropriate.
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*/
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flag_exp = xtype==etEXP;
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if( xtype!=etFLOAT ){
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realvalue += rounder;
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if( realvalue>=10.0 ){ realvalue *= 0.1; exp++; }
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}
|
|
if( xtype==etGENERIC ){
|
|
flag_rtz = !flag_alternateform;
|
|
if( exp<-4 || exp>precision ){
|
|
xtype = etEXP;
|
|
}else{
|
|
precision = precision - exp;
|
|
xtype = etFLOAT;
|
|
}
|
|
}else{
|
|
flag_rtz = 0;
|
|
}
|
|
if( xtype==etEXP ){
|
|
e2 = 0;
|
|
}else{
|
|
e2 = exp;
|
|
}
|
|
nsd = 0;
|
|
flag_dp = (precision>0) | flag_alternateform | flag_altform2;
|
|
/* The sign in front of the number */
|
|
if( prefix ){
|
|
*(bufpt++) = prefix;
|
|
}
|
|
/* Digits prior to the decimal point */
|
|
if( e2<0 ){
|
|
*(bufpt++) = '0';
|
|
}else{
|
|
for(; e2>=0; e2--){
|
|
*(bufpt++) = et_getdigit(&realvalue,&nsd);
|
|
}
|
|
}
|
|
/* The decimal point */
|
|
if( flag_dp ){
|
|
*(bufpt++) = '.';
|
|
}
|
|
/* "0" digits after the decimal point but before the first
|
|
** significant digit of the number */
|
|
for(e2++; e2<0 && precision>0; precision--, e2++){
|
|
*(bufpt++) = '0';
|
|
}
|
|
/* Significant digits after the decimal point */
|
|
while( (precision--)>0 ){
|
|
*(bufpt++) = et_getdigit(&realvalue,&nsd);
|
|
}
|
|
/* Remove trailing zeros and the "." if no digits follow the "." */
|
|
if( flag_rtz && flag_dp ){
|
|
while( bufpt[-1]=='0' ) *(--bufpt) = 0;
|
|
assert( bufpt>buf );
|
|
if( bufpt[-1]=='.' ){
|
|
if( flag_altform2 ){
|
|
*(bufpt++) = '0';
|
|
}else{
|
|
*(--bufpt) = 0;
|
|
}
|
|
}
|
|
}
|
|
/* Add the "eNNN" suffix */
|
|
if( flag_exp || (xtype==etEXP && exp) ){
|
|
*(bufpt++) = aDigits[infop->charset];
|
|
if( exp<0 ){
|
|
*(bufpt++) = '-'; exp = -exp;
|
|
}else{
|
|
*(bufpt++) = '+';
|
|
}
|
|
if( exp>=100 ){
|
|
*(bufpt++) = (exp/100)+'0'; /* 100's digit */
|
|
exp %= 100;
|
|
}
|
|
*(bufpt++) = exp/10+'0'; /* 10's digit */
|
|
*(bufpt++) = exp%10+'0'; /* 1's digit */
|
|
}
|
|
*bufpt = 0;
|
|
|
|
/* The converted number is in buf[] and zero terminated. Output it.
|
|
** Note that the number is in the usual order, not reversed as with
|
|
** integer conversions. */
|
|
length = bufpt-buf;
|
|
bufpt = buf;
|
|
|
|
/* Special case: Add leading zeros if the flag_zeropad flag is
|
|
** set and we are not left justified */
|
|
if( flag_zeropad && !flag_leftjustify && length < width){
|
|
int i;
|
|
int nPad = width - length;
|
|
for(i=width; i>=nPad; i--){
|
|
bufpt[i] = bufpt[i-nPad];
|
|
}
|
|
i = prefix!=0;
|
|
while( nPad-- ) bufpt[i++] = '0';
|
|
length = width;
|
|
}
|
|
#endif
|
|
break;
|
|
case etSIZE:
|
|
*(va_arg(ap,int*)) = count;
|
|
length = width = 0;
|
|
break;
|
|
case etPERCENT:
|
|
buf[0] = '%';
|
|
bufpt = buf;
|
|
length = 1;
|
|
break;
|
|
case etCHARLIT:
|
|
case etCHARX:
|
|
c = buf[0] = (xtype==etCHARX ? va_arg(ap,int) : *++fmt);
|
|
if( precision>=0 ){
|
|
for(idx=1; idx<precision; idx++) buf[idx] = c;
|
|
length = precision;
|
|
}else{
|
|
length =1;
|
|
}
|
|
bufpt = buf;
|
|
break;
|
|
case etSTRING:
|
|
case etDYNSTRING:
|
|
bufpt = va_arg(ap,char*);
|
|
if( bufpt==0 ){
|
|
bufpt = "";
|
|
}else if( xtype==etDYNSTRING ){
|
|
zExtra = bufpt;
|
|
}
|
|
length = strlen(bufpt);
|
|
if( precision>=0 && precision<length ) length = precision;
|
|
break;
|
|
case etSQLESCAPE:
|
|
case etSQLESCAPE2: {
|
|
int i, j, n, ch, isnull;
|
|
int needQuote;
|
|
char *escarg = va_arg(ap,char*);
|
|
isnull = escarg==0;
|
|
if( isnull ) escarg = (xtype==etSQLESCAPE2 ? "NULL" : "(NULL)");
|
|
for(i=n=0; (ch=escarg[i])!=0; i++){
|
|
if( ch=='\'' ) n++;
|
|
}
|
|
needQuote = !isnull && xtype==etSQLESCAPE2;
|
|
n += i + 1 + needQuote*2;
|
|
if( n>etBUFSIZE ){
|
|
bufpt = zExtra = sqliteMalloc( n );
|
|
if( bufpt==0 ) return -1;
|
|
}else{
|
|
bufpt = buf;
|
|
}
|
|
j = 0;
|
|
if( needQuote ) bufpt[j++] = '\'';
|
|
for(i=0; (ch=escarg[i])!=0; i++){
|
|
bufpt[j++] = ch;
|
|
if( ch=='\'' ) bufpt[j++] = ch;
|
|
}
|
|
if( needQuote ) bufpt[j++] = '\'';
|
|
bufpt[j] = 0;
|
|
length = j;
|
|
/* The precision is ignored on %q and %Q */
|
|
/* if( precision>=0 && precision<length ) length = precision; */
|
|
break;
|
|
}
|
|
case etTOKEN: {
|
|
Token *pToken = va_arg(ap, Token*);
|
|
if( pToken && pToken->z ){
|
|
(*func)(arg, (char*)pToken->z, pToken->n);
|
|
}
|
|
length = width = 0;
|
|
break;
|
|
}
|
|
case etSRCLIST: {
|
|
SrcList *pSrc = va_arg(ap, SrcList*);
|
|
int k = va_arg(ap, int);
|
|
struct SrcList_item *pItem = &pSrc->a[k];
|
|
assert( k>=0 && k<pSrc->nSrc );
|
|
if( pItem->zDatabase && pItem->zDatabase[0] ){
|
|
(*func)(arg, pItem->zDatabase, strlen(pItem->zDatabase));
|
|
(*func)(arg, ".", 1);
|
|
}
|
|
(*func)(arg, pItem->zName, strlen(pItem->zName));
|
|
length = width = 0;
|
|
break;
|
|
}
|
|
}/* End switch over the format type */
|
|
/*
|
|
** The text of the conversion is pointed to by "bufpt" and is
|
|
** "length" characters long. The field width is "width". Do
|
|
** the output.
|
|
*/
|
|
if( !flag_leftjustify ){
|
|
register int nspace;
|
|
nspace = width-length;
|
|
if( nspace>0 ){
|
|
count += nspace;
|
|
while( nspace>=etSPACESIZE ){
|
|
(*func)(arg,spaces,etSPACESIZE);
|
|
nspace -= etSPACESIZE;
|
|
}
|
|
if( nspace>0 ) (*func)(arg,spaces,nspace);
|
|
}
|
|
}
|
|
if( length>0 ){
|
|
(*func)(arg,bufpt,length);
|
|
count += length;
|
|
}
|
|
if( flag_leftjustify ){
|
|
register int nspace;
|
|
nspace = width-length;
|
|
if( nspace>0 ){
|
|
count += nspace;
|
|
while( nspace>=etSPACESIZE ){
|
|
(*func)(arg,spaces,etSPACESIZE);
|
|
nspace -= etSPACESIZE;
|
|
}
|
|
if( nspace>0 ) (*func)(arg,spaces,nspace);
|
|
}
|
|
}
|
|
if( zExtra ){
|
|
sqliteFree(zExtra);
|
|
}
|
|
}/* End for loop over the format string */
|
|
return errorflag ? -1 : count;
|
|
} /* End of function */
|
|
|
|
|
|
/* This structure is used to store state information about the
|
|
** write to memory that is currently in progress.
|
|
*/
|
|
struct sgMprintf {
|
|
char *zBase; /* A base allocation */
|
|
char *zText; /* The string collected so far */
|
|
int nChar; /* Length of the string so far */
|
|
int nTotal; /* Output size if unconstrained */
|
|
int nAlloc; /* Amount of space allocated in zText */
|
|
void *(*xRealloc)(void*,int); /* Function used to realloc memory */
|
|
};
|
|
|
|
/*
|
|
** This function implements the callback from vxprintf.
|
|
**
|
|
** This routine add nNewChar characters of text in zNewText to
|
|
** the sgMprintf structure pointed to by "arg".
|
|
*/
|
|
static void mout(void *arg, const char *zNewText, int nNewChar){
|
|
struct sgMprintf *pM = (struct sgMprintf*)arg;
|
|
pM->nTotal += nNewChar;
|
|
if( pM->nChar + nNewChar + 1 > pM->nAlloc ){
|
|
if( pM->xRealloc==0 ){
|
|
nNewChar = pM->nAlloc - pM->nChar - 1;
|
|
}else{
|
|
pM->nAlloc = pM->nChar + nNewChar*2 + 1;
|
|
if( pM->zText==pM->zBase ){
|
|
pM->zText = pM->xRealloc(0, pM->nAlloc);
|
|
if( pM->zText && pM->nChar ){
|
|
memcpy(pM->zText, pM->zBase, pM->nChar);
|
|
}
|
|
}else{
|
|
char *zNew;
|
|
zNew = pM->xRealloc(pM->zText, pM->nAlloc);
|
|
if( zNew ){
|
|
pM->zText = zNew;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
if( pM->zText ){
|
|
if( nNewChar>0 ){
|
|
memcpy(&pM->zText[pM->nChar], zNewText, nNewChar);
|
|
pM->nChar += nNewChar;
|
|
}
|
|
pM->zText[pM->nChar] = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** This routine is a wrapper around xprintf() that invokes mout() as
|
|
** the consumer.
|
|
*/
|
|
static char *base_vprintf(
|
|
void *(*xRealloc)(void*,int), /* Routine to realloc memory. May be NULL */
|
|
int useInternal, /* Use internal %-conversions if true */
|
|
char *zInitBuf, /* Initially write here, before mallocing */
|
|
int nInitBuf, /* Size of zInitBuf[] */
|
|
const char *zFormat, /* format string */
|
|
va_list ap /* arguments */
|
|
){
|
|
struct sgMprintf sM;
|
|
sM.zBase = sM.zText = zInitBuf;
|
|
sM.nChar = sM.nTotal = 0;
|
|
sM.nAlloc = nInitBuf;
|
|
sM.xRealloc = xRealloc;
|
|
vxprintf(mout, &sM, useInternal, zFormat, ap);
|
|
if( xRealloc ){
|
|
if( sM.zText==sM.zBase ){
|
|
sM.zText = xRealloc(0, sM.nChar+1);
|
|
if( sM.zText ){
|
|
memcpy(sM.zText, sM.zBase, sM.nChar+1);
|
|
}
|
|
}else if( sM.nAlloc>sM.nChar+10 ){
|
|
char *zNew = xRealloc(sM.zText, sM.nChar+1);
|
|
if( zNew ){
|
|
sM.zText = zNew;
|
|
}
|
|
}
|
|
}
|
|
return sM.zText;
|
|
}
|
|
|
|
/*
|
|
** Realloc that is a real function, not a macro.
|
|
*/
|
|
static void *printf_realloc(void *old, int size){
|
|
return sqliteRealloc(old,size);
|
|
}
|
|
|
|
/*
|
|
** Print into memory obtained from sqliteMalloc(). Use the internal
|
|
** %-conversion extensions.
|
|
*/
|
|
char *sqlite3VMPrintf(const char *zFormat, va_list ap){
|
|
char zBase[SQLITE_PRINT_BUF_SIZE];
|
|
return base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
|
|
}
|
|
|
|
/*
|
|
** Print into memory obtained from sqliteMalloc(). Use the internal
|
|
** %-conversion extensions.
|
|
*/
|
|
char *sqlite3MPrintf(const char *zFormat, ...){
|
|
va_list ap;
|
|
char *z;
|
|
char zBase[SQLITE_PRINT_BUF_SIZE];
|
|
va_start(ap, zFormat);
|
|
z = base_vprintf(printf_realloc, 1, zBase, sizeof(zBase), zFormat, ap);
|
|
va_end(ap);
|
|
return z;
|
|
}
|
|
|
|
/*
|
|
** Print into memory obtained from malloc(). Do not use the internal
|
|
** %-conversion extensions. This routine is for use by external users.
|
|
*/
|
|
char *sqlite3_mprintf(const char *zFormat, ...){
|
|
va_list ap;
|
|
char *z;
|
|
char zBuf[200];
|
|
|
|
va_start(ap,zFormat);
|
|
z = base_vprintf((void*(*)(void*,int))realloc, 0,
|
|
zBuf, sizeof(zBuf), zFormat, ap);
|
|
va_end(ap);
|
|
return z;
|
|
}
|
|
|
|
/* This is the varargs version of sqlite3_mprintf.
|
|
*/
|
|
char *sqlite3_vmprintf(const char *zFormat, va_list ap){
|
|
char zBuf[200];
|
|
return base_vprintf((void*(*)(void*,int))realloc, 0,
|
|
zBuf, sizeof(zBuf), zFormat, ap);
|
|
}
|
|
|
|
/*
|
|
** sqlite3_snprintf() works like snprintf() except that it ignores the
|
|
** current locale settings. This is important for SQLite because we
|
|
** are not able to use a "," as the decimal point in place of "." as
|
|
** specified by some locales.
|
|
*/
|
|
char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){
|
|
char *z;
|
|
va_list ap;
|
|
|
|
va_start(ap,zFormat);
|
|
z = base_vprintf(0, 0, zBuf, n, zFormat, ap);
|
|
va_end(ap);
|
|
return z;
|
|
}
|
|
|
|
#if defined(SQLITE_TEST) || defined(SQLITE_DEBUG)
|
|
/*
|
|
** A version of printf() that understands %lld. Used for debugging.
|
|
** The printf() built into some versions of windows does not understand %lld
|
|
** and segfaults if you give it a long long int.
|
|
*/
|
|
void sqlite3DebugPrintf(const char *zFormat, ...){
|
|
extern int getpid(void);
|
|
va_list ap;
|
|
char zBuf[500];
|
|
va_start(ap, zFormat);
|
|
base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap);
|
|
va_end(ap);
|
|
fprintf(stdout,"%d: %s", getpid(), zBuf);
|
|
fflush(stdout);
|
|
}
|
|
#endif
|