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New plugin file format, new zlib libraries

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This commit is contained in:
David Anderson 2005-08-01 09:02:52 +00:00
parent 65bd10c47b
commit a776e832dd
6 changed files with 367 additions and 108 deletions
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177
amxmodx/amxxfile.cpp
View File

@ -51,10 +51,6 @@
#endif
#endif
typedef char mint8_t;
typedef int16_t mint16_t;
typedef int32_t mint32_t;
struct TableEntry
{
mint8_t cellSize PACKED;
@ -76,6 +72,8 @@ struct TableEntry
CAmxxReader::CAmxxReader(const char *filename, int cellsize)
{
m_Bh.plugins = NULL;
m_AmxxFile = false;
if (!filename)
{
m_Status = Err_InvalidParam;
@ -96,41 +94,55 @@ CAmxxReader::CAmxxReader(const char *filename, int cellsize)
DATAREAD(&magic, sizeof(magic), 1);
m_OldFile = false;
if (magic != 0x414D5842)
{
// check for old file
AMX_HEADER hdr;
rewind(m_pFile);
fread(&hdr, sizeof(hdr), 1, m_pFile);
amx_Align16(&hdr.magic);
if (hdr.magic == AMX_MAGIC)
{
if (cellsize != 4)
{
m_Status = Err_SectionNotFound;
fclose(m_pFile);
m_pFile = NULL;
return;
}
m_OldFile = true;
return;
}
else
{
// no known file format
m_Status = Err_FileInvalid;
fclose(m_pFile);
m_pFile = NULL;
return;
}
} else if ( magic == 0x524C4542 ) {
if ( magic == 0x524C4542 ) {
//we have an invalid, old, RLEB file
m_Status = Err_OldFile;
fclose(m_pFile);
m_pFile = NULL;
return;
} else {
} else if ( magic == MAGIC_HEADER2 ) {
DATAREAD(&m_Bh.version, sizeof(int16_t), 1);
if (m_Bh.version != MAGIC_VERSION)
{
m_Status = Err_OldFile;
fclose(m_pFile);
m_pFile = NULL;
return;
}
m_AmxxFile = true;
DATAREAD(&m_Bh.numPlugins, sizeof(mint8_t), 1);
m_Bh.plugins = new PluginEntry[m_Bh.numPlugins];
PluginEntry *pe;
m_SectionHdrOffset = 0;
m_Entry = -1;
for (mint8_t i=0; i<m_Bh.numPlugins; i++)
{
pe = &(m_Bh.plugins[i]);
DATAREAD(&pe->cellsize, sizeof(mint8_t), 1);
DATAREAD(&pe->disksize, sizeof(int32_t), 1);
DATAREAD(&pe->imagesize, sizeof(int32_t), 1);
DATAREAD(&pe->memsize, sizeof(int32_t), 1);
DATAREAD(&pe->offs, sizeof(int32_t), 1);
}
for (mint8_t i=0; i<m_Bh.numPlugins; i++)
{
pe = &(m_Bh.plugins[i]);
if (pe->cellsize == m_CellSize)
{
m_Entry = i;
break;
}
}
if (m_Entry == -1)
{
m_Status = Err_SectionNotFound;
fclose(m_pFile);
m_pFile = NULL;
return;
}
pe = &(m_Bh.plugins[m_Entry]);
m_SectionLength = pe->disksize;
} else if (magic == MAGIC_HEADER) {
// try to find the section
mint8_t numOfPlugins;
@ -170,6 +182,33 @@ CAmxxReader::CAmxxReader(const char *filename, int cellsize)
fseek(m_pFile, 0, SEEK_END);
m_SectionLength = ftell(m_pFile) - (long)entry.offset;
}
} else {
// check for old file
AMX_HEADER hdr;
rewind(m_pFile);
fread(&hdr, sizeof(hdr), 1, m_pFile);
amx_Align16(&hdr.magic);
if (hdr.magic == AMX_MAGIC)
{
if (cellsize != 4)
{
m_Status = Err_SectionNotFound;
fclose(m_pFile);
m_pFile = NULL;
return;
}
m_OldFile = true;
return;
}
else
{
// no known file format
m_Status = Err_FileInvalid;
fclose(m_pFile);
m_pFile = NULL;
return;
}
}
}
@ -180,6 +219,11 @@ CAmxxReader::~CAmxxReader()
fclose(m_pFile);
m_pFile = NULL;
}
if (m_Bh.plugins)
{
delete m_Bh.plugins;
m_Bh.plugins = NULL;
}
}
CAmxxReader::Error CAmxxReader::GetStatus()
@ -205,7 +249,6 @@ size_t CAmxxReader::GetBufferSize()
if (!m_pFile)
return 0;
long save = ftell(m_pFile);
if (m_OldFile)
@ -215,6 +258,11 @@ size_t CAmxxReader::GetBufferSize()
DATAREAD(&hdr, sizeof(hdr), 1);
fseek(m_pFile, save, SEEK_SET);
return hdr.stp;
} else if (m_AmxxFile) {
PluginEntry *pe = &(m_Bh.plugins[m_Entry]);
if (pe->imagesize > pe->memsize)
return pe->imagesize + 1;
return pe->memsize + 1;
}
fseek(m_pFile, m_SectionHdrOffset, SEEK_SET);
@ -252,27 +300,44 @@ CAmxxReader::Error CAmxxReader::GetSection(void *buffer)
DATAREAD(buffer, 1, filesize);
m_Status = Err_None;
return m_Status;
}
// new file type: go to the section table entry
fseek(m_pFile, m_SectionHdrOffset, SEEK_SET);
// go to the offset
TableEntry entry;
DATAREAD(&entry, sizeof(entry), 1);
fseek(m_pFile, entry.offset, SEEK_SET);
uLongf destLen = GetBufferSize();
// read the data to a temporary buffer
char *tempBuffer = new char[m_SectionLength + 1];
//fread(tempBuffer, sizeof(char), m_SectionLength, m_pFile);
DATAREAD((void*)tempBuffer, 1, m_SectionLength);
// decompress
int result = uncompress((Bytef *)buffer, &destLen,
} else if (m_AmxxFile) {
PluginEntry *pe = &(m_Bh.plugins[m_Entry]);
char *tempBuffer = new char[m_SectionLength + 1];
fseek(m_pFile, pe->offs, SEEK_SET);
DATAREAD((void *)tempBuffer, 1, m_SectionLength);
uLongf destLen = GetBufferSize();
int result = uncompress((Bytef *)buffer, &destLen,
(Bytef *)tempBuffer, m_SectionLength);
delete [] tempBuffer;
if (result != Z_OK)
{
m_Status = Err_Decompress;
return Err_Decompress;
delete [] tempBuffer;
if (result != Z_OK)
{
AMXXLOG_Log("[AMXX] Zlib error encountered: %d(%d)", result, m_SectionLength);
m_Status = Err_Decompress;
return Err_Decompress;
}
return Err_None;
} else {
// new file type: go to the section table entry
fseek(m_pFile, m_SectionHdrOffset, SEEK_SET);
// go to the offset
TableEntry entry;
DATAREAD(&entry, sizeof(entry), 1);
fseek(m_pFile, entry.offset, SEEK_SET);
uLongf destLen = GetBufferSize();
// read the data to a temporary buffer
char *tempBuffer = new char[m_SectionLength + 1];
//fread(tempBuffer, sizeof(char), m_SectionLength, m_pFile);
DATAREAD((void*)tempBuffer, 1, m_SectionLength);
// decompress
int result = uncompress((Bytef *)buffer, &destLen,
(Bytef *)tempBuffer, m_SectionLength);
delete [] tempBuffer;
if (result != Z_OK)
{
AMXXLOG_Log("[AMXX] Zlib error encountered: %d(%d)", result, m_SectionLength);
m_Status = Err_Decompress;
return Err_Decompress;
}
return Err_None;
}
return Err_None;
}

29
amxmodx/amxxfile.h
View File

@ -32,6 +32,31 @@
#ifndef __AMXXFILE_H__
#define __AMXXFILE_H__
#define MAGIC_HEADER 0x414D5842
#define MAGIC_HEADER2 0x414D5858
#define MAGIC_VERSION 0x0300
typedef char mint8_t;
typedef int16_t mint16_t;
typedef int32_t mint32_t;
struct PluginEntry
{
mint8_t cellsize; //cell size
int32_t imagesize; //uncompressed image size
int32_t disksize; //compressed image size
int32_t memsize; //memory image size
int32_t offs; //file offset
};
struct BinHeader
{
int32_t magic;
mint16_t version;
mint8_t numPlugins;
PluginEntry *plugins;
};
class CAmxxReader
{
public:
@ -53,6 +78,9 @@ private:
FILE *m_pFile;
bool m_OldFile; // old .amx file
bool m_AmxxFile; // new 'AMXX' header format
BinHeader m_Bh; // binary header
int m_Entry; // entry #
int m_CellSize;
int m_SectionHdrOffset; // offset to the table in the header that describes the required section
@ -66,6 +94,5 @@ public:
Error GetSection(void *buffer); // Copy the currently selected section to the buffer
};
#endif // __AMXXFILE_H__

8
amxmodx/modules.cpp
View File

@ -1482,7 +1482,7 @@ void LogError(AMX *amx, int err, const char *fmt, ...)
//does this plugin have debug info?
va_list arg;
AMX_DBGINFO *pInfo = (AMX_DBGINFO *)(amx->userdata[2]);
CPluginMngr::CPlugin *pPlugin = g_plugins.findPluginFast(amx);
const char *name = get_amxscriptname(amx);
static char buf[1024];
static char vbuf[1024];
*buf = 0;
@ -1501,7 +1501,8 @@ void LogError(AMX *amx, int err, const char *fmt, ...)
AMXXLOG_Log("[AMXX] %s", vbuf);
if (!pInfo || !(amx->flags & AMX_FLAG_DEBUG) || !pInfo->pDebug)
{
AMXXLOG_Log("[AMXX] Debug is not enabled (plugin \"%s\")", pPlugin->getName());
AMXXLOG_Log("[AMXX] Debug is not enabled (plugin \"%s\")", name);
invalidate = true;
} else {
long line;
@ -1511,7 +1512,7 @@ void LogError(AMX *amx, int err, const char *fmt, ...)
int i=0, iLine;
cell frame;
AMXXLOG_Log("[AMXX] Displaying call trace (plugin \"%s\")", pPlugin->getName());
AMXXLOG_Log("[AMXX] Displaying call trace (plugin \"%s\")", name);
while (pTrace)
{
frame = pTrace->frm;
@ -1671,6 +1672,7 @@ void Module_CacheFunctions()
// other amx stuff
REGISTER_FUNC("amx_Exec", amx_Exec)
REGISTER_FUNC("amx_Push", amx_Push);
REGISTER_FUNC("amx_Execv", amx_Execv) //I HOPE NO ONE USES THIS!!!!
REGISTER_FUNC("amx_Allot", amx_Allot)
REGISTER_FUNC("amx_FindPublic", amx_FindPublic)

10
amxmodx/msvc/amxmodx_mm.vcproj
View File

@ -325,6 +325,7 @@
LinkIncremental="1"
SuppressStartupBanner="TRUE"
AdditionalLibraryDirectories="..\extra\lib_win32"
IgnoreDefaultLibraryNames="MSVCRT"
ModuleDefinitionFile=""
GenerateDebugInformation="TRUE"
ProgramDatabaseFile=".\jitdebug/amxx_mm.pdb"
@ -390,11 +391,12 @@
<Tool
Name="VCLinkerTool"
AdditionalOptions="/MACHINE:I386"
AdditionalDependencies="..\zlib\zlib.lib ..\JIT\amxjitsn.obj ..\JIT\amxexecn.obj"
AdditionalDependencies="..\zlib\zlib.lib ..\JIT\amxjitsn.obj ..\JIT\amxexecn.obj ..\JIT\natives-x86.obj"
OutputFile="jitrelease/amxmodx_mm.dll"
LinkIncremental="1"
SuppressStartupBanner="TRUE"
AdditionalLibraryDirectories="..\extra\lib_win32"
IgnoreDefaultLibraryNames="MSVCRT"
ModuleDefinitionFile=""
GenerateDebugInformation="TRUE"
ProgramDatabaseFile=".\jitrelease/amxx_mm.pdb"
@ -811,6 +813,12 @@
<File
RelativePath="..\resource.h">
</File>
<File
RelativePath="..\zlib\zconf.h">
</File>
<File
RelativePath="..\zlib\zlib.h">
</File>
<Filter
Name="mmgr"
Filter="">

249
amxmodx/zlib/zlib.h
View File

@ -1,7 +1,7 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.2.1, November 17th, 2003
version 1.2.3, July 18th, 2005
Copyright (C) 1995-2003 Jean-loup Gailly and Mark Adler
Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
@ -37,8 +37,8 @@
extern "C" {
#endif
#define ZLIB_VERSION "1.2.1"
#define ZLIB_VERNUM 0x1210
#define ZLIB_VERSION "1.2.3"
#define ZLIB_VERNUM 0x1230
/*
The 'zlib' compression library provides in-memory compression and
@ -53,24 +53,22 @@ extern "C" {
application must provide more input and/or consume the output
(providing more output space) before each call.
The compressed data format used by the in-memory functions is the zlib
format, which is a zlib wrapper documented in RFC 1950, wrapped around a
deflate stream, which is itself documented in RFC 1951.
The compressed data format used by default by the in-memory functions is
the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
around a deflate stream, which is itself documented in RFC 1951.
The library also supports reading and writing files in gzip (.gz) format
with an interface similar to that of stdio using the functions that start
with "gz". The gzip format is different from the zlib format. gzip is a
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
This library can optionally read and write gzip streams in memory as well.
The zlib format was designed to be compact and fast for use in memory
and on communications channels. The gzip format was designed for single-
file compression on file systems, has a larger header than zlib to maintain
directory information, and uses a different, slower check method than zlib.
This library does not provide any functions to write gzip files in memory.
However such functions could be easily written using zlib's deflate function,
the documentation in the gzip RFC, and the examples in gzio.c.
The library does not install any signal handler. The decoder checks
the consistency of the compressed data, so the library should never
crash even in case of corrupted input.
@ -97,13 +95,36 @@ typedef struct z_stream_s {
free_func zfree; /* used to free the internal state */
voidpf opaque; /* private data object passed to zalloc and zfree */
int data_type; /* best guess about the data type: ascii or binary */
int data_type; /* best guess about the data type: binary or text */
uLong adler; /* adler32 value of the uncompressed data */
uLong reserved; /* reserved for future use */
} z_stream;
typedef z_stream FAR *z_streamp;
/*
gzip header information passed to and from zlib routines. See RFC 1952
for more details on the meanings of these fields.
*/
typedef struct gz_header_s {
int text; /* true if compressed data believed to be text */
uLong time; /* modification time */
int xflags; /* extra flags (not used when writing a gzip file) */
int os; /* operating system */
Bytef *extra; /* pointer to extra field or Z_NULL if none */
uInt extra_len; /* extra field length (valid if extra != Z_NULL) */
uInt extra_max; /* space at extra (only when reading header) */
Bytef *name; /* pointer to zero-terminated file name or Z_NULL */
uInt name_max; /* space at name (only when reading header) */
Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */
uInt comm_max; /* space at comment (only when reading header) */
int hcrc; /* true if there was or will be a header crc */
int done; /* true when done reading gzip header (not used
when writing a gzip file) */
} gz_header;
typedef gz_header FAR *gz_headerp;
/*
The application must update next_in and avail_in when avail_in has
dropped to zero. It must update next_out and avail_out when avail_out
@ -168,11 +189,13 @@ typedef z_stream FAR *z_streamp;
#define Z_FILTERED 1
#define Z_HUFFMAN_ONLY 2
#define Z_RLE 3
#define Z_FIXED 4
#define Z_DEFAULT_STRATEGY 0
/* compression strategy; see deflateInit2() below for details */
#define Z_BINARY 0
#define Z_ASCII 1
#define Z_TEXT 1
#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
#define Z_UNKNOWN 2
/* Possible values of the data_type field (though see inflate()) */
@ -246,6 +269,10 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
and with zero avail_out, it must be called again after making room in the
output buffer because there might be more output pending.
Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
decide how much data to accumualte before producing output, in order to
maximize compression.
If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
flushed to the output buffer and the output is aligned on a byte boundary, so
that the decompressor can get all input data available so far. (In particular
@ -257,7 +284,7 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
Z_SYNC_FLUSH, and the compression state is reset so that decompression can
restart from this point if previous compressed data has been damaged or if
random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
the compression.
compression.
If deflate returns with avail_out == 0, this function must be called again
with the same value of the flush parameter and more output space (updated
@ -282,8 +309,8 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
deflate() sets strm->adler to the adler32 checksum of all input read
so far (that is, total_in bytes).
deflate() may update data_type if it can make a good guess about
the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
deflate() may update strm->data_type if it can make a good guess about
the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
binary. This field is only for information purposes and does not affect
the compression algorithm in any manner.
@ -365,11 +392,11 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
output as possible to the output buffer. Z_BLOCK requests that inflate() stop
if and when it get to the next deflate block boundary. When decoding the zlib
or gzip format, this will cause inflate() to return immediately after the
header and before the first block. When doing a raw inflate, inflate() will
go ahead and process the first block, and will return when it gets to the end
of that block, or when it runs out of data.
if and when it gets to the next deflate block boundary. When decoding the
zlib or gzip format, this will cause inflate() to return immediately after
the header and before the first block. When doing a raw inflate, inflate()
will go ahead and process the first block, and will return when it gets to
the end of that block, or when it runs out of data.
The Z_BLOCK option assists in appending to or combining deflate streams.
Also to assist in this, on return inflate() will set strm->data_type to the
@ -401,7 +428,7 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
because Z_BLOCK is used.
If a preset dictionary is needed after this call (see inflateSetDictionary
below), inflate sets strm-adler to the adler32 checksum of the dictionary
below), inflate sets strm->adler to the adler32 checksum of the dictionary
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the adler32 checksum of all output produced so far (that is,
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
@ -478,7 +505,8 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
16 to windowBits to write a simple gzip header and trailer around the
compressed data instead of a zlib wrapper. The gzip header will have no
file name, no extra data, no comment, no modification time (set to zero),
no header crc, and the operating system will be set to 255 (unknown).
no header crc, and the operating system will be set to 255 (unknown). If a
gzip stream is being written, strm->adler is a crc32 instead of an adler32.
The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but
@ -497,7 +525,9 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as
Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy
parameter only affects the compression ratio but not the correctness of the
compressed output even if it is not set appropriately.
compressed output even if it is not set appropriately. Z_FIXED prevents the
use of dynamic Huffman codes, allowing for a simpler decoder for special
applications.
deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
@ -526,7 +556,9 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
deflateInit or deflateInit2, a part of the dictionary may in effect be
discarded, for example if the dictionary is larger than the window size in
deflate or deflate2. Thus the strings most likely to be useful should be
put at the end of the dictionary, not at the front.
put at the end of the dictionary, not at the front. In addition, the
current implementation of deflate will use at most the window size minus
262 bytes of the provided dictionary.
Upon return of this function, strm->adler is set to the adler32 value
of the dictionary; the decompressor may later use this value to determine
@ -592,6 +624,23 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
if strm->avail_out was zero.
*/
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
int good_length,
int max_lazy,
int nice_length,
int max_chain));
/*
Fine tune deflate's internal compression parameters. This should only be
used by someone who understands the algorithm used by zlib's deflate for
searching for the best matching string, and even then only by the most
fanatic optimizer trying to squeeze out the last compressed bit for their
specific input data. Read the deflate.c source code for the meaning of the
max_lazy, good_length, nice_length, and max_chain parameters.
deflateTune() can be called after deflateInit() or deflateInit2(), and
returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
*/
ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
uLong sourceLen));
/*
@ -617,6 +666,30 @@ ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
stream state was inconsistent.
*/
ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
gz_headerp head));
/*
deflateSetHeader() provides gzip header information for when a gzip
stream is requested by deflateInit2(). deflateSetHeader() may be called
after deflateInit2() or deflateReset() and before the first call of
deflate(). The text, time, os, extra field, name, and comment information
in the provided gz_header structure are written to the gzip header (xflag is
ignored -- the extra flags are set according to the compression level). The
caller must assure that, if not Z_NULL, name and comment are terminated with
a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
available there. If hcrc is true, a gzip header crc is included. Note that
the current versions of the command-line version of gzip (up through version
1.3.x) do not support header crc's, and will report that it is a "multi-part
gzip file" and give up.
If deflateSetHeader is not used, the default gzip header has text false,
the time set to zero, and os set to 255, with no extra, name, or comment
fields. The gzip header is returned to the default state by deflateReset().
deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
/*
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
int windowBits));
@ -649,14 +722,15 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
windowBits can also be greater than 15 for optional gzip decoding. Add
32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR).
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is
a crc32 instead of an adler32.
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
memLevel). msg is set to null if there is no error message. inflateInit2
does not perform any decompression apart from reading the zlib header if
present: this will be done by inflate(). (So next_in and avail_in may be
modified, but next_out and avail_out are unchanged.)
memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg
is set to null if there is no error message. inflateInit2 does not perform
any decompression apart from reading the zlib header if present: this will
be done by inflate(). (So next_in and avail_in may be modified, but next_out
and avail_out are unchanged.)
*/
ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
@ -664,11 +738,14 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
uInt dictLength));
/*
Initializes the decompression dictionary from the given uncompressed byte
sequence. This function must be called immediately after a call of inflate
if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by this call of
inflate. The compressor and decompressor must use exactly the same
dictionary (see deflateSetDictionary).
sequence. This function must be called immediately after a call of inflate,
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called
immediately after inflateInit2() or inflateReset() and before any call of
inflate() to set the dictionary. The application must insure that the
dictionary that was used for compression is provided.
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is
@ -719,8 +796,64 @@ ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
stream state was inconsistent (such as zalloc or state being NULL).
*/
ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
int bits,
int value));
/*
ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
This function inserts bits in the inflate input stream. The intent is
that this function is used to start inflating at a bit position in the
middle of a byte. The provided bits will be used before any bytes are used
from next_in. This function should only be used with raw inflate, and
should be used before the first inflate() call after inflateInit2() or
inflateReset(). bits must be less than or equal to 16, and that many of the
least significant bits of value will be inserted in the input.
inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
gz_headerp head));
/*
inflateGetHeader() requests that gzip header information be stored in the
provided gz_header structure. inflateGetHeader() may be called after
inflateInit2() or inflateReset(), and before the first call of inflate().
As inflate() processes the gzip stream, head->done is zero until the header
is completed, at which time head->done is set to one. If a zlib stream is
being decoded, then head->done is set to -1 to indicate that there will be
no gzip header information forthcoming. Note that Z_BLOCK can be used to
force inflate() to return immediately after header processing is complete
and before any actual data is decompressed.
The text, time, xflags, and os fields are filled in with the gzip header
contents. hcrc is set to true if there is a header CRC. (The header CRC
was valid if done is set to one.) If extra is not Z_NULL, then extra_max
contains the maximum number of bytes to write to extra. Once done is true,
extra_len contains the actual extra field length, and extra contains the
extra field, or that field truncated if extra_max is less than extra_len.
If name is not Z_NULL, then up to name_max characters are written there,
terminated with a zero unless the length is greater than name_max. If
comment is not Z_NULL, then up to comm_max characters are written there,
terminated with a zero unless the length is greater than comm_max. When
any of extra, name, or comment are not Z_NULL and the respective field is
not present in the header, then that field is set to Z_NULL to signal its
absence. This allows the use of deflateSetHeader() with the returned
structure to duplicate the header. However if those fields are set to
allocated memory, then the application will need to save those pointers
elsewhere so that they can be eventually freed.
If inflateGetHeader is not used, then the header information is simply
discarded. The header is always checked for validity, including the header
CRC if present. inflateReset() will reset the process to discard the header
information. The application would need to call inflateGetHeader() again to
retrieve the header from the next gzip stream.
inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.
*/
/*
ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
unsigned char FAR *window));
Initialize the internal stream state for decompression using inflateBack()
@ -744,7 +877,7 @@ ZEXTERN int ZEXPORT inflateBackInit OF((z_stream FAR *strm, int windowBits,
typedef unsigned (*in_func) OF((void FAR *, unsigned char FAR * FAR *));
typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
in_func in, void FAR *in_desc,
out_func out, void FAR *out_desc));
/*
@ -813,7 +946,7 @@ ZEXTERN int ZEXPORT inflateBack OF((z_stream FAR *strm,
that inflateBack() cannot return Z_OK.
*/
ZEXTERN int ZEXPORT inflateBackEnd OF((z_stream FAR *strm));
ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
/*
All memory allocated by inflateBackInit() is freed.
@ -1087,6 +1220,12 @@ ZEXTERN int ZEXPORT gzeof OF((gzFile file));
input stream, otherwise zero.
*/
ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
/*
Returns 1 if file is being read directly without decompression, otherwise
zero.
*/
ZEXTERN int ZEXPORT gzclose OF((gzFile file));
/*
Flushes all pending output if necessary, closes the compressed file
@ -1119,7 +1258,6 @@ ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
*/
ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
/*
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
return the updated checksum. If buf is NULL, this function returns
@ -1135,12 +1273,21 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
if (adler != original_adler) error();
*/
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
z_off_t len2));
/*
Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
*/
ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
/*
Update a running crc with the bytes buf[0..len-1] and return the updated
crc. If buf is NULL, this function returns the required initial value
for the crc. Pre- and post-conditioning (one's complement) is performed
within this function so it shouldn't be done by the application.
Update a running CRC-32 with the bytes buf[0..len-1] and return the
updated CRC-32. If buf is NULL, this function returns the required initial
value for the for the crc. Pre- and post-conditioning (one's complement) is
performed within this function so it shouldn't be done by the application.
Usage example:
uLong crc = crc32(0L, Z_NULL, 0);
@ -1151,6 +1298,16 @@ ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
if (crc != original_crc) error();
*/
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
/*
Combine two CRC-32 check values into one. For two sequences of bytes,
seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32
check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
len2.
*/
/* various hacks, don't look :) */
@ -1167,7 +1324,7 @@ ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
int stream_size));
ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
const char *version, int stream_size));
ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
unsigned char FAR *window,
const char *version,
int stream_size));
@ -1189,7 +1346,7 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_stream FAR *strm, int windowBits,
struct internal_state {int dummy;}; /* hack for buggy compilers */
#endif
ZEXTERN const char * ZEXPORT zError OF((int err));
ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));

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