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* include/freetype/ftgzip.h, src/gzip/ftgzip.c:

Browse Source 
adding support for gzip compressed streams !!

        * src/pcf/pcfdriver.c: adding automatic support for gzip-compressed
        PCF files
BRANCH-2-1-5
David Turner 23 years ago
parent 081eef595a
commit 02ea1e569c
30 changed files with 4444 additions and 120 deletions
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  1. 12
      ChangeLog
  2. 11
      include/freetype/config/ftheader.h
  3. 184
      include/freetype/config/ftoption.h
  4. 70
      include/freetype/ftgzip.h
  5. 5
      include/freetype/ftsystem.h
  6. 3
      include/freetype/internal/ftstream.h
  7. 1
      include/freetype/internal/internal.h
  8. 8
      include/freetype/internal/pcftypes.h
  9. 1
      src/Jamfile
  10. 10
      src/gzip/Jamfile
  11. 48
      src/gzip/adler32.c
  12. 23
      src/gzip/descrip.mms
  13. 529
      src/gzip/ftgzip.c
  14. 402
      src/gzip/infblock.c
  15. 44
      src/gzip/infblock.h
  16. 250
      src/gzip/infcodes.c
  17. 31
      src/gzip/infcodes.h
  18. 151
      src/gzip/inffixed.h
  19. 371
      src/gzip/inflate.c
  20. 453
      src/gzip/inftrees.c
  21. 63
      src/gzip/inftrees.h
  22. 86
      src/gzip/infutil.c
  23. 96
      src/gzip/infutil.h
  24. 66
      src/gzip/rules.mk
  25. 279
      src/gzip/zconf.h
  26. 889
      src/gzip/zlib.h
  27. 223
      src/gzip/zutil.c
  28. 220
      src/gzip/zutil.h
  29. 4
      src/pcf/pcf.h
  30. 31
      src/pcf/pcfdriver.c

12
ChangeLog
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@ -1,3 +1,15 @@
2002-10-31 David Turner <david@freetype.org>
* include/freetype/ftgzip.h, src/gzip/ftgzip.c:
adding support for gzip compressed streams !!
* src/pcf/pcfdriver.c: adding automatic support for gzip-compressed
PCF files
2002-10-30 David Turner <david@freetype.org>
* FreeType 2.1.3rc3 released
2002-10-25 David Turner <david@freetype.org>
* include/freetype/ftcache.h (FT_POINTER_TO_ULONG): New macro.

11
include/freetype/config/ftheader.h
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@ -361,6 +361,17 @@
/* */
#define FT_BDF_H <freetype/ftbdf.h>
/*************************************************************************/
/* */
/* @macro: */
/* FT_GZIP_H */
/* */
/* @description: */
/* A macro used in #include statements to name the file containing */
/* the definitions of an API to support for gzip-compressed files. */
/* */
#define FT_GZIP_H <freetype/ftgzip.h>
/*************************************************************************/
/* */

184
include/freetype/config/ftoption.h
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@ -25,7 +25,6 @@
FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* USER-SELECTABLE CONFIGURATION MACROS */
@ -78,68 +77,76 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* CMap support */
/* Many compilers provide a non-ANSI 64-bit data type that can be used */
/* by FreeType to speed up some computations. However, this will create */
/* some problems when compiling the library in strict ANSI mode. */
/* */
/* For this reason, the use of 64-bit ints is normally disabled when */
/* the __STDC__ macro is defined. You can however disable this by */
/* defining here the macro FT_CONFIG_OPTION_FORCE_INT64. */
/* */
/* Define this if you want generic cmap support. */
/* For most compilers, this will only create compilation warnings */
/* when building the library. */
/* */
#define FT_CONFIG_OPTION_USE_CMAPS
/* ObNote: The compiler-specific 64-bit integers are detected in the */
/* file "ftconfig.h" either statically, or through Autoconf */
/* on platforms that support it. */
/* */
#undef FT_CONFIG_OPTION_FORCE_INT64
/*************************************************************************/
/* */
/* Convenience functions support */
/* Gzip-compressed file support. */
/* */
/* Some functions of the FreeType 2 API are provided as a convenience */
/* for client applications and developers. However, they are not */
/* required to build and run the library itself. */
/* FreeType now handles font files that have been compressed with the */
/* 'gzip' program. This is mostly used to parse many of the PCF files */
/* that come with XFree86. The implementation uses 'zlib' to */
/* partially uncompress the file on the fly (see src/base/ftgzip.c). */
/* */
/* By defining this configuration macro, you'll disable the */
/* compilation of these functions at build time. This can be useful */
/* to reduce the library's code size when you don't need any of */
/* these functions. */
/* Define this macro if you want to enable this "feature". Note that */
/* this will however force you to link the zlib to any program that */
/* also uses FreeType. */
/* */
/* All convenience functions are declared as such in their */
/* documentation. */
/* */
#undef FT_CONFIG_OPTION_NO_CONVENIENCE_FUNCS
#define FT_CONFIG_OPTION_USE_ZLIB
/*************************************************************************/
/* */
/* Module errors */
/* DLL export compilation */
/* */
/* If this macro is set (which is _not_ the default), the higher byte */
/* of an error code gives the module in which the error has occurred, */
/* while the lower byte is the real error code. */
/* When compiling FreeType as a DLL, some systems/compilers need a */
/* special keyword in front OR after the return type of function */
/* declarations. */
/* */
/* Setting this macro makes sense for debugging purposes only, since */
/* it would break source compatibility of certain programs that use */
/* FreeType 2. */
/* Two macros are used within the FreeType source code to define */
/* exported library functions: FT_EXPORT and FT_EXPORT_DEF. */
/* */
/* More details can be found in the files ftmoderr.h and fterrors.h. */
/* FT_EXPORT( return_type ) */
/* */
#undef FT_CONFIG_OPTION_USE_MODULE_ERRORS
/*************************************************************************/
/* is used in a function declaration, as in */
/* */
/* Alternate Glyph Image Format support */
/* FT_EXPORT( FT_Error ) */
/* FT_Init_FreeType( FT_Library* alibrary ); */
/* */
/* By default, the glyph images returned by the FreeType glyph loader */
/* can either be a pixmap or a vectorial outline defined through */
/* Bezier control points. When defining the following configuration */
/* macro, some font drivers will be able to register alternate */
/* glyph image formats. */
/* */
/* Unset this macro if you are sure that you will never use a font */
/* driver with an alternate glyph format; this will reduce the size of */
/* the base layer code. */
/* FT_EXPORT_DEF( return_type ) */
/* */
/* is used in a function definition, as in */
/* */
/* FT_EXPORT_DEF( FT_Error ) */
/* FT_Init_FreeType( FT_Library* alibrary ) */
/* { */
/* ... some code ... */
/* return FT_Err_Ok; */
/* } */
/* */
/* Note that a few Type 1 fonts, as well as Windows `vector' fonts */
/* use a vector `plotter' format that isn't supported when this */
/* macro is undefined. */
/* You can provide your own implementation of FT_EXPORT and */
/* FT_EXPORT_DEF here if you want. If you leave them undefined, they */
/* will be later automatically defined as `extern return_type' to */
/* allow normal compilation. */
/* */
#define FT_CONFIG_OPTION_ALTERNATE_GLYPH_FORMATS
#undef FT_EXPORT
#undef FT_EXPORT_DEF
/*************************************************************************/
@ -185,26 +192,6 @@ FT_BEGIN_HEADER
#define FT_CONFIG_OPTION_ADOBE_GLYPH_LIST
/*************************************************************************/
/* */
/* Many compilers provide a non-ANSI 64-bit data type that can be used */
/* by FreeType to speed up some computations. However, this will create */
/* some problems when compiling the library in strict ANSI mode. */
/* */
/* For this reason, the use of 64-bit ints is normally disabled when */
/* the __STDC__ macro is defined. You can however disable this by */
/* defining here the macro FT_CONFIG_OPTION_FORCE_INT64. */
/* */
/* For most compilers, this will only create compilation warnings */
/* when building the library. */
/* */
/* ObNote: The compiler-specific 64-bit integers are detected in the */
/* file "ftconfig.h" either statically, or through Autoconf */
/* on platforms that support it. */
/* */
#undef FT_CONFIG_OPTION_FORCE_INT64
/*************************************************************************/
/* */
/* Allow the use of FT_Incremental_Interface to load typefaces that */
@ -217,41 +204,23 @@ FT_BEGIN_HEADER
/*************************************************************************/
/* */
/* DLL export compilation */
/* */
/* When compiling FreeType as a DLL, some systems/compilers need a */
/* special keyword in front OR after the return type of function */
/* declarations. */
/* */
/* Two macros are used within the FreeType source code to define */
/* exported library functions: FT_EXPORT and FT_EXPORT_DEF. */
/* */
/* FT_EXPORT( return_type ) */
/* */
/* is used in a function declaration, as in */
/* */
/* FT_EXPORT( FT_Error ) */
/* FT_Init_FreeType( FT_Library* alibrary ); */
/* */
/* The size in bytes of the render pool used by the scan-line converter */
/* to do all of its work. */
/* */
/* FT_EXPORT_DEF( return_type ) */
/* This must be greater than 4kByte. */
/* */
/* is used in a function definition, as in */
#define FT_RENDER_POOL_SIZE 16384L
/*************************************************************************/
/* */
/* FT_EXPORT_DEF( FT_Error ) */
/* FT_Init_FreeType( FT_Library* alibrary ) */
/* { */
/* ... some code ... */
/* return FT_Err_Ok; */
/* } */
/* FT_MAX_MODULES */
/* */
/* You can provide your own implementation of FT_EXPORT and */
/* FT_EXPORT_DEF here if you want. If you leave them undefined, they */
/* will be later automatically defined as `extern return_type' to */
/* allow normal compilation. */
/* The maximum number of modules that can be registered in a single */
/* FreeType library object. 32 is the default. */
/* */
#undef FT_EXPORT
#undef FT_EXPORT_DEF
#define FT_MAX_MODULES 32
/*************************************************************************/
/* */
@ -286,24 +255,23 @@ FT_BEGIN_HEADER
#undef FT_DEBUG_MEMORY
/*************************************************************************/
/* */
/* The size in bytes of the render pool used by the scan-line converter */
/* to do all of its work. */
/* */
/* This must be greater than 4kByte. */
/* Module errors */
/* */
#define FT_RENDER_POOL_SIZE 16384L
/*************************************************************************/
/* If this macro is set (which is _not_ the default), the higher byte */
/* of an error code gives the module in which the error has occurred, */
/* while the lower byte is the real error code. */
/* */
/* FT_MAX_MODULES */
/* Setting this macro makes sense for debugging purposes only, since */
/* it would break source compatibility of certain programs that use */
/* FreeType 2. */
/* */
/* The maximum number of modules that can be registered in a single */
/* FreeType library object. 32 is the default. */
/* More details can be found in the files ftmoderr.h and fterrors.h. */
/* */
#define FT_MAX_MODULES 32
#undef FT_CONFIG_OPTION_USE_MODULE_ERRORS
/*************************************************************************/
@ -456,14 +424,6 @@ FT_BEGIN_HEADER
#define T1_MAX_CHARSTRINGS_OPERANDS 256
/*************************************************************************/
/* */
/* Define T1_CONFIG_OPTION_DISABLE_HINTER if you want to generate a */
/* driver with no hinter. This can be useful to debug the parser. */
/* */
#undef T1_CONFIG_OPTION_DISABLE_HINTER
/*************************************************************************/
/* */
/* Define this configuration macro if you want to prevent the */

70
include/freetype/ftgzip.h
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@ -0,0 +1,70 @@
/***************************************************************************/
/* */
/* ftgzip.h */
/* */
/* Gzip-compressed stream support. */
/* */
/* Copyright 2002 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
#ifndef __FTXF86_H__
#define __FTXF86_H__
#include <ft2build.h>
#include FT_FREETYPE_H
FT_BEGIN_HEADER
/************************************************************************
*
* @type: FT_Stream_OpenGzip
*
* @description:
* open a new stream to parse gzip-compressed font files. This is
* mainly used to support the compressed *.pcf.gz fonts that come
* with XFree86
*
* @input:
* stream :: target embedding stream
* source :: source stream, used to
*
* @return:
* error code. 0 means success
*
* @note:
* the source stream must be opened _before_ calling this function.
*
* calling @FT_Stream_Close on the new stream will *not* call
* @FT_Stream_Close on the source stream. None of the stream objects
* will be released to the heap.
*
* the stream implementation is very basic, and resets the decompression
* process each time seeking backwards is needed within the stream
*
* in certain builds of the library, gzip compression recognition is
* automatic when calling @FT_New_Face or @FT_OpenFace. This means that
* if no font driver is capable of handling the raw compressed file,
* the library will try to open a gzip stream from it and re-open
* the face with it.
*
* this function may return "FT_Err_Unimplemented" if your build of
* FreeType was not compiled with zlib support.
*/
FT_EXPORT( FT_Error )
FT_Stream_OpenGzip( FT_Stream stream,
FT_Stream source );
/* */
FT_END_HEADER
#endif /* __FTXF86_H__ */

5
include/freetype/ftsystem.h
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@ -280,7 +280,7 @@ FT_BEGIN_HEADER
/* limit :: This field is set and used internally by FreeType */
/* when parsing frames. */
/* */
struct FT_StreamRec_
typedef struct FT_StreamRec_
{
unsigned char* base;
unsigned long size;
@ -294,7 +294,8 @@ FT_BEGIN_HEADER
FT_Memory memory;
unsigned char* cursor;
unsigned char* limit;
};
} FT_StreamRec;
/* */

3
include/freetype/internal/ftstream.h
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@ -21,6 +21,7 @@
#include <ft2build.h>
#include FT_SYSTEM_H
#include FT_INTERNAL_OBJECTS_H
@ -387,7 +388,7 @@ FT_BEGIN_HEADER
FT_BASE( void )
FT_Stream_ReleaseFrame( FT_Stream stream,
FT_Byte** pbytes );
/* read a byte from an entered frame */
FT_BASE( FT_Char )
FT_Stream_GetChar( FT_Stream stream );

1
include/freetype/internal/internal.h
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@ -44,7 +44,6 @@
#define FT_INTERNAL_CFF_TYPES_H <freetype/internal/cfftypes.h>
#define FT_INTERNAL_FNT_TYPES_H <freetype/internal/fnttypes.h>
#define FT_INTERNAL_BDF_TYPES_H <freetype/internal/bdftypes.h>
#define FT_INTERNAL_PCF_TYPES_H <freetype/internal/pcftypes.h>
#define FT_INTERNAL_PFR_H <freetype/internal/pfr.h>
#define FT_INTERNAL_POSTSCRIPT_NAMES_H <freetype/internal/psnames.h>

8
include/freetype/internal/pcftypes.h
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@ -38,10 +38,12 @@ FT_BEGIN_HEADER
typedef struct PCF_Public_FaceRec_
{
FT_FaceRec root;
FT_FaceRec root;
FT_StreamRec gzip_stream;
FT_Stream gzip_source;
char* charset_encoding;
char* charset_registry;
char* charset_encoding;
char* charset_registry;
} PCF_Public_FaceRec, *PCF_Public_Face;

1
src/Jamfile
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@ -14,6 +14,7 @@ SubDirHdrs [ FT2_SubDir src ] ;
#
HDRMACRO [ FT2_SubDir include internal internal.h ] ;
SubInclude FT2_TOP src gzip ;
SubInclude FT2_TOP src autohint ;
SubInclude FT2_TOP src base ;
SubInclude FT2_TOP src bdf ;

10
src/gzip/Jamfile
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@ -0,0 +1,10 @@
# FreeType 2 src/gzip Jamfile (c) 2001 David Turner
#
SubDir FT2_TOP src gzip ;
SubDirHdrs [ FT2_SubDir src gzip ] ;
Library $(FT2_LIB) : ftgzip.c ;
# end of src/pcf Jamfile

48
src/gzip/adler32.c
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@ -0,0 +1,48 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
#include "zlib.h"
#define BASE 65521L /* largest prime smaller than 65536 */
#define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
#define DO16(buf) DO8(buf,0); DO8(buf,8);
/* ========================================================================= */
uLong ZEXPORT adler32(adler, buf, len)
uLong adler;
const Bytef *buf;
uInt len;
{
unsigned long s1 = adler & 0xffff;
unsigned long s2 = (adler >> 16) & 0xffff;
int k;
if (buf == Z_NULL) return 1L;
while (len > 0) {
k = len < NMAX ? len : NMAX;
len -= k;
while (k >= 16) {
DO16(buf);
buf += 16;
k -= 16;
}
if (k != 0) do {
s1 += *buf++;
s2 += s1;
} while (--k);
s1 %= BASE;
s2 %= BASE;
}
return (s2 << 16) | s1;
}

23
src/gzip/descrip.mms
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@ -0,0 +1,23 @@
#
# FreeType 2 GZip support compilation rules for VMS
#
# Copyright 2002 by
# David Turner, Robert Wilhelm, and Werner Lemberg.
#
# This file is part of the FreeType project, and may only be used, modified,
# and distributed under the terms of the FreeType project license,
# LICENSE.TXT. By continuing to use, modify, or distribute this file you
# indicate that you have read the license and understand and accept it
# fully.
CFLAGS=$(COMP_FLAGS)$(DEBUG)/include=([--.include],[--.src.gzip])
OBJS=ftgzip.obj
all : $(OBJS)
library [--.lib]freetype.olb $(OBJS)
# EOF

529
src/gzip/ftgzip.c
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@ -0,0 +1,529 @@
/***************************************************************************/
/* */
/* ftgzip.c */
/* */
/* FreeType support for .gz compressed fileds */
/* */
/* this optional component relies on zlib. It should mainly be used to */
/* parse compressed PCF fonts, as found with many X11 server */
/* distributions. */
/* */
/* Copyright 2002 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
/* modified, and distributed under the terms of the FreeType project */
/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
/* this file you indicate that you have read the license and */
/* understand and accept it fully. */
/* */
/***************************************************************************/
#include <ft2build.h>
#include FT_INTERNAL_MEMORY_H
#include FT_INTERNAL_STREAM_H
#include FT_INTERNAL_DEBUG_H
#include <string.h>
#ifdef FT_CONFIG_OPTION_USE_ZLIB
# define NO_DUMMY_DECL
# define BUILDFIXED /* save code size */
# include "zlib.h"
# if 1 /* we choose to include directly the zlib sources in this component */
/* this is done to avoid ugly library dependencies */
# undef SLOW
# define SLOW 1 /* we can't use asm-optimized sources here !! */
# include "zutil.c"
# include "inftrees.c"
# include "infcodes.c"
# include "infutil.c"
# include "infblock.c"
# include "inflate.c"
# include "adler32.c"
# endif /* 1 */
/***************************************************************************/
/***************************************************************************/
/***** *****/
/***** Z L I B M E M O R Y M A N A G E M E N T *****/
/***** *****/
/***************************************************************************/
/***************************************************************************/
/* it's better to use FreeType memory routines instead of raw 'malloc/free' */
static voidpf
ft_gzip_alloc( FT_Memory memory,
uInt items,
uInt size )
{
FT_ULong sz = (FT_ULong)size * items;
FT_Pointer p;
FT_MEM_ALLOC( p, sz );
return (voidpf) p;
}
static void
ft_gzip_free( FT_Memory memory,
voidpf address )
{
FT_MEM_FREE( address );
}
/***************************************************************************/
/***************************************************************************/
/***** *****/
/***** Z L I B F I L E D E S C R I P T O R *****/
/***** *****/
/***************************************************************************/
/***************************************************************************/
#define FT_GZIP_BUFFER_SIZE 4096
typedef struct FT_GZipFileRec_
{
FT_Stream source; /* parent/source stream */
FT_Stream stream; /* embedding stream */
FT_Memory memory; /* memory allocator */
z_stream zstream; /* zlib input stream */
FT_ULong start; /* starting position, after .gz header */
FT_Byte input[ FT_GZIP_BUFFER_SIZE ]; /* input read buffer */
FT_Byte buffer[ FT_GZIP_BUFFER_SIZE ]; /* output buffer */
FT_ULong pos; /* position in output */
FT_Byte* cursor;
FT_Byte* limit;
} FT_GZipFileRec, *FT_GZipFile;
/* gzip flag byte */
#define FT_GZIP_ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
#define FT_GZIP_HEAD_CRC 0x02 /* bit 1 set: header CRC present */
#define FT_GZIP_EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
#define FT_GZIP_ORIG_NAME 0x08 /* bit 3 set: original file name present */
#define FT_GZIP_COMMENT 0x10 /* bit 4 set: file comment present */
#define FT_GZIP_RESERVED 0xE0 /* bits 5..7: reserved */
/* check and skip .gz header - we don't support "transparent" compression */
static FT_Error
ft_gzip_check_header( FT_Stream stream )
{
FT_Error error;
FT_Byte head[4];
if ( FT_STREAM_SEEK( 0 ) ||
FT_STREAM_READ( head, 4 ) )
goto Exit;
/* head[0] && head[1] are the magic numbers */
/* head[2] is the method, and head[3] the flags */
if ( head[0] != 0x1f ||
head[1] != 0x8b ||
head[2] != Z_DEFLATED ||
(head[3] & FT_GZIP_RESERVED) )
{
error = FT_Err_Invalid_File_Format;
goto Exit;
}
/* skip time, xflags and os code */
(void)FT_STREAM_SKIP( 6 );
/* skip the extra field */
if ( head[3] && FT_GZIP_EXTRA_FIELD )
{
FT_UInt len;
if ( FT_READ_USHORT_LE( len ) ||
FT_STREAM_SKIP( len ) )
goto Exit;
}
/* skip original file name */
if ( head[3] && FT_GZIP_ORIG_NAME )
for (;;)
{
FT_UInt c;
if ( FT_READ_BYTE( c) )
goto Exit;
if ( c == 0 )
break;
}
/* skip .gz comment */
if ( head[3] & FT_GZIP_COMMENT )
for (;;)
{
FT_UInt c;
if ( FT_READ_BYTE( c) )
goto Exit;
if ( c == 0 )
break;
}
/* skip CRC */
if ( head[3] & FT_GZIP_HEAD_CRC )
if ( FT_STREAM_SKIP( 2 ) )
goto Exit;
Exit:
return error;
}
static FT_Error
ft_gzip_file_init( FT_GZipFile zip,
FT_Stream stream,
FT_Stream source )
{
z_stream* zstream = &zip->zstream;
FT_Error error = 0;
zip->stream = stream;
zip->source = source;
zip->memory = stream->memory;
zip->limit = zip->buffer + FT_GZIP_BUFFER_SIZE;
zip->cursor = zip->limit;
zip->pos = 0;
/* check and skip .gz header */
{
stream = source;
error = ft_gzip_check_header( stream );
if (error)
goto Exit;
zip->start = FT_STREAM_POS();
}
/* initialize zlib - there is no zlib header in the compressed stream */
zstream->zalloc = (alloc_func) ft_gzip_alloc;
zstream->zfree = (free_func) ft_gzip_free;
zstream->opaque = stream->memory;
zstream->avail_in = 0;
zstream->next_in = zip->buffer;
if ( inflateInit2( zstream, -MAX_WBITS ) != Z_OK ||
zstream->next_in == NULL )
{
error = FT_Err_Invalid_File_Format;
goto Exit;
}
Exit:
return error;
}
static void
ft_gzip_file_done( FT_GZipFile zip )
{
z_stream* zstream = &zip->zstream;
/* clear the rest */
zstream->zalloc = NULL;
zstream->zfree = NULL;
zstream->opaque = NULL;
zstream->next_in = NULL;
zstream->next_out = NULL;
zstream->avail_in = 0;
zstream->avail_out = 0;
zip->memory = NULL;
zip->source = NULL;
zip->stream = NULL;
}
static FT_Error
ft_gzip_file_reset( FT_GZipFile zip )
{
FT_Stream stream = zip->source;
FT_Error error;
if ( !FT_STREAM_SEEK( zip->start ) )
{
z_stream* zstream = &zip->zstream;
inflateReset( zstream );
zstream->avail_in = 0;
zstream->next_in = zip->input;
zstream->avail_out = 0;
zstream->next_out = zip->buffer;
zip->limit = zip->buffer + FT_GZIP_BUFFER_SIZE;
zip->cursor = zip->limit;
zip->pos = 0;
}
return error;
}
static FT_Error
ft_gzip_file_fill_input( FT_GZipFile zip )
{
z_stream* zstream = &zip->zstream;
FT_Stream stream = zip->source;
FT_ULong size;
if ( stream->read )
{
size = stream->read( stream, stream->pos, zip->input, FT_GZIP_BUFFER_SIZE );
if ( size == 0 )
return FT_Err_Invalid_Stream_Operation;
}
else
{
size = stream->size - stream->pos;
if ( size > FT_GZIP_BUFFER_SIZE )
size = FT_GZIP_BUFFER_SIZE;
if ( size == 0 )
return FT_Err_Invalid_Stream_Operation;
FT_MEM_COPY( zip->input, stream->base + stream->pos, size );
}
stream->pos += size;
zstream->next_in = zip->input;
zstream->avail_in = size;
return 0;
}
static FT_Error
ft_gzip_file_fill_output( FT_GZipFile zip )
{
z_stream* zstream = &zip->zstream;
FT_Error error = 0;
zip->cursor = zip->buffer;
zstream->next_out = zip->cursor;
zstream->avail_out = FT_GZIP_BUFFER_SIZE;
while ( zstream->avail_out > 0 )
{
int err;
if ( zstream->avail_in == 0 )
{
error = ft_gzip_file_fill_input( zip );
if ( error )
break;
}
err = inflate( zstream, Z_NO_FLUSH );
if ( err == Z_STREAM_END )
{
zip->limit = zstream->next_out;
break;
}
else if ( err != Z_OK )
{
error = FT_Err_Invalid_Stream_Operation;
break;
}
}
return error;
}
/* fill output buffer, 'count' must be <= FT_GZIP_BUFFER_SIZE */
static FT_Error
ft_gzip_file_skip_output( FT_GZipFile zip,
FT_ULong count )
{
FT_Error error = 0;
FT_ULong delta;
for (;;)
{
delta = (FT_ULong)( zip->limit - zip->cursor );
if ( delta >= count )
delta = count;
zip->cursor += delta;
zip->pos += delta;
count -= delta;
if ( count == 0 )
break;
error = ft_gzip_file_fill_output( zip );
if ( error )
break;
}
return error;
}
static FT_ULong
ft_gzip_file_io( FT_GZipFile zip,
FT_ULong pos,
FT_Byte* buffer,
FT_ULong count )
{
FT_ULong result = 0;
FT_Error error;
/* reset inflate stream if we're seeking backwards */
/* yes, that's not too efficient, but it saves memory :-) */
if ( pos < zip->pos )
{
error = ft_gzip_file_reset( zip );
if ( error ) goto Exit;
}
/* skip unwanted bytes */
if ( pos > zip->pos )
{
error = ft_gzip_file_skip_output( zip, (FT_ULong)( pos - zip->pos ) );
if (error)
goto Exit;
}
if ( count == 0 )
goto Exit;
/* now read the data */
for (;;)
{
FT_ULong delta;
delta = (FT_ULong)( zip->limit - zip->cursor );
if ( delta >= count )
delta = count;
FT_MEM_COPY( buffer, zip->cursor, delta );
buffer += delta;
result += delta;
zip->cursor += delta;
zip->pos += delta;
count -= delta;
if ( count == 0 )
break;
error = ft_gzip_file_fill_output( zip );
if (error)
break;
}
Exit:
return result;
}
/***************************************************************************/
/***************************************************************************/
/***** *****/
/***** G Z E M B E D D I N G S T R E A M *****/
/***** *****/
/***************************************************************************/
/***************************************************************************/
static void
ft_gzip_stream_close( FT_Stream stream )
{
FT_GZipFile zip = stream->descriptor.pointer;
FT_Memory memory = stream->memory;
if ( zip )
{
/* finalize gzip file descriptor */
ft_gzip_file_done( zip );
FT_FREE( zip );
stream->descriptor.pointer = NULL;
}
}
static FT_ULong
ft_gzip_stream_io( FT_Stream stream,
FT_ULong pos,
FT_Byte* buffer,
FT_ULong count )
{
FT_GZipFile zip = stream->descriptor.pointer;
return ft_gzip_file_io( zip, pos, buffer, count );
}
FT_EXPORT_DEF( FT_Error )
FT_Stream_OpenGzip( FT_Stream stream,
FT_Stream source )
{
FT_Error error;
FT_Memory memory = source->memory;
FT_GZipFile zip;
FT_ZERO( stream );
stream->memory = memory;
if ( !FT_NEW( zip ) )
{
error = ft_gzip_file_init( zip, stream, source );
if ( error )
{
FT_FREE( zip );
goto Exit;
}
stream->descriptor.pointer = zip;
}
stream->size = 0x7FFFFFFF; /* don't know the real size !! */
stream->pos = 0;
stream->base = 0;
stream->read = ft_gzip_stream_io;
stream->close = ft_gzip_stream_close;
Exit:
return error;
}
#else /* !FT_CONFIG_OPTION_USE_ZLIB */
FT_EXPORT_DEF( FT_Error )
FT_Stream_OpenGzip( FT_Stream stream,
FT_Stream source )
{
FT_UNUSED( stream );
FT_UNUSED( source );
return FT_Err_Unimplemented_Feature;
}
#endif /* !FT_CONFIG_OPTION_USE_ZLIB */

402
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/* infblock.c -- interpret and process block types to last block
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "infblock.h"
#include "inftrees.h"
#include "infcodes.h"
#include "infutil.h"
/* simplify the use of the inflate_huft type with some defines */
#define exop word.what.Exop
#define bits word.what.Bits
/* Table for deflate from PKZIP's appnote.txt. */
local const uInt border[] = { /* Order of the bit length code lengths */
16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
/*
Notes beyond the 1.93a appnote.txt:
1. Distance pointers never point before the beginning of the output
stream.
2. Distance pointers can point back across blocks, up to 32k away.
3. There is an implied maximum of 7 bits for the bit length table and
15 bits for the actual data.
4. If only one code exists, then it is encoded using one bit. (Zero
would be more efficient, but perhaps a little confusing.) If two
codes exist, they are coded using one bit each (0 and 1).
5. There is no way of sending zero distance codes--a dummy must be
sent if there are none. (History: a pre 2.0 version of PKZIP would
store blocks with no distance codes, but this was discovered to be
too harsh a criterion.) Valid only for 1.93a. 2.04c does allow
zero distance codes, which is sent as one code of zero bits in
length.
6. There are up to 286 literal/length codes. Code 256 represents the
end-of-block. Note however that the static length tree defines
288 codes just to fill out the Huffman codes. Codes 286 and 287
cannot be used though, since there is no length base or extra bits
defined for them. Similarily, there are up to 30 distance codes.
However, static trees define 32 codes (all 5 bits) to fill out the
Huffman codes, but the last two had better not show up in the data.
7. Unzip can check dynamic Huffman blocks for complete code sets.
The exception is that a single code would not be complete (see #4).
8. The five bits following the block type is really the number of
literal codes sent minus 257.
9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
(1+6+6). Therefore, to output three times the length, you output
three codes (1+1+1), whereas to output four times the same length,
you only need two codes (1+3). Hmm.
10. In the tree reconstruction algorithm, Code = Code + Increment
only if BitLength(i) is not zero. (Pretty obvious.)
11. Correction: 4 Bits: # of Bit Length codes - 4 (4 - 19)
12. Note: length code 284 can represent 227-258, but length code 285
really is 258. The last length deserves its own, short code
since it gets used a lot in very redundant files. The length
258 is special since 258 - 3 (the min match length) is 255.
13. The literal/length and distance code bit lengths are read as a
single stream of lengths. It is possible (and advantageous) for
a repeat code (16, 17, or 18) to go across the boundary between
the two sets of lengths.
*/
void inflate_blocks_reset(s, z, c)
inflate_blocks_statef *s;
z_streamp z;
uLongf *c;
{
if (c != Z_NULL)
*c = s->check;
if (s->mode == BTREE || s->mode == DTREE)
ZFREE(z, s->sub.trees.blens);
if (s->mode == CODES)
inflate_codes_free(s->sub.decode.codes, z);
s->mode = TYPE;
s->bitk = 0;
s->bitb = 0;
s->read = s->write = s->window;
if (s->checkfn != Z_NULL)
z->adler = s->check = (*s->checkfn)(0L, (const Bytef *)Z_NULL, 0);
Tracev((stderr, "inflate: blocks reset\n"));
}
inflate_blocks_statef *inflate_blocks_new(z, c, w)
z_streamp z;
check_func c;
uInt w;
{
inflate_blocks_statef *s;
if ((s = (inflate_blocks_statef *)ZALLOC
(z,1,sizeof(struct inflate_blocks_state))) == Z_NULL)
return s;
if ((s->hufts =
(inflate_huft *)ZALLOC(z, sizeof(inflate_huft), MANY)) == Z_NULL)
{
ZFREE(z, s);
return Z_NULL;
}
if ((s->window = (Bytef *)ZALLOC(z, 1, w)) == Z_NULL)
{
ZFREE(z, s->hufts);
ZFREE(z, s);
return Z_NULL;
}
s->end = s->window + w;
s->checkfn = c;
s->mode = TYPE;
Tracev((stderr, "inflate: blocks allocated\n"));
inflate_blocks_reset(s, z, Z_NULL);
return s;
}
int inflate_blocks(s, z, r)
inflate_blocks_statef *s;
z_streamp z;
int r;
{
uInt t; /* temporary storage */
uLong b; /* bit buffer */
uInt k; /* bits in bit buffer */
Bytef *p; /* input data pointer */
uInt n; /* bytes available there */
Bytef *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
/* copy input/output information to locals (UPDATE macro restores) */
LOAD
/* process input based on current state */
while (1) switch (s->mode)
{
case TYPE:
NEEDBITS(3)
t = (uInt)b & 7;
s->last = t & 1;
switch (t >> 1)
{
case 0: /* stored */
Tracev((stderr, "inflate: stored block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
t = k & 7; /* go to byte boundary */
DUMPBITS(t)
s->mode = LENS; /* get length of stored block */
break;
case 1: /* fixed */
Tracev((stderr, "inflate: fixed codes block%s\n",
s->last ? " (last)" : ""));
{
uInt bl, bd;
inflate_huft *tl, *td;
inflate_trees_fixed(&bl, &bd, &tl, &td, z);
s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z);
if (s->sub.decode.codes == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
}
DUMPBITS(3)
s->mode = CODES;
break;
case 2: /* dynamic */
Tracev((stderr, "inflate: dynamic codes block%s\n",
s->last ? " (last)" : ""));
DUMPBITS(3)
s->mode = TABLE;
break;
case 3: /* illegal */
DUMPBITS(3)
s->mode = BAD;
z->msg = (char*)"invalid block type";
r = Z_DATA_ERROR;
LEAVE
}
break;
case LENS:
NEEDBITS(32)
if ((((~b) >> 16) & 0xffff) != (b & 0xffff))
{
s->mode = BAD;
z->msg = (char*)"invalid stored block lengths";
r = Z_DATA_ERROR;
LEAVE
}
s->sub.left = (uInt)b & 0xffff;
b = k = 0; /* dump bits */
Tracev((stderr, "inflate: stored length %u\n", s->sub.left));
s->mode = s->sub.left ? STORED : (s->last ? DRY : TYPE);
break;
case STORED:
if (n == 0)
LEAVE
NEEDOUT
t = s->sub.left;
if (t > n) t = n;
if (t > m) t = m;
zmemcpy(q, p, t);
p += t; n -= t;
q += t; m -= t;
if ((s->sub.left -= t) != 0)
break;
Tracev((stderr, "inflate: stored end, %lu total out\n",
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
s->mode = s->last ? DRY : TYPE;
break;
case TABLE:
NEEDBITS(14)
s->sub.trees.table = t = (uInt)b & 0x3fff;
#ifndef PKZIP_BUG_WORKAROUND
if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29)
{
s->mode = BAD;
z->msg = (char*)"too many length or distance symbols";
r = Z_DATA_ERROR;
LEAVE
}
#endif
t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
if ((s->sub.trees.blens = (uIntf*)ZALLOC(z, t, sizeof(uInt))) == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
DUMPBITS(14)
s->sub.trees.index = 0;
Tracev((stderr, "inflate: table sizes ok\n"));
s->mode = BTREE;
case BTREE:
while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
{
NEEDBITS(3)
s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
DUMPBITS(3)
}
while (s->sub.trees.index < 19)
s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
s->sub.trees.bb = 7;
t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
&s->sub.trees.tb, s->hufts, z);
if (t != Z_OK)
{
r = t;
if (r == Z_DATA_ERROR)
{
ZFREE(z, s->sub.trees.blens);
s->mode = BAD;
}
LEAVE
}
s->sub.trees.index = 0;
Tracev((stderr, "inflate: bits tree ok\n"));
s->mode = DTREE;
case DTREE:
while (t = s->sub.trees.table,
s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
{
inflate_huft *h;
uInt i, j, c;
t = s->sub.trees.bb;
NEEDBITS(t)
h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
t = h->bits;
c = h->base;
if (c < 16)
{
DUMPBITS(t)
s->sub.trees.blens[s->sub.trees.index++] = c;
}
else /* c == 16..18 */
{
i = c == 18 ? 7 : c - 14;
j = c == 18 ? 11 : 3;
NEEDBITS(t + i)
DUMPBITS(t)
j += (uInt)b & inflate_mask[i];
DUMPBITS(i)
i = s->sub.trees.index;
t = s->sub.trees.table;
if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
(c == 16 && i < 1))
{
ZFREE(z, s->sub.trees.blens);
s->mode = BAD;
z->msg = (char*)"invalid bit length repeat";
r = Z_DATA_ERROR;
LEAVE
}
c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
do {
s->sub.trees.blens[i++] = c;
} while (--j);
s->sub.trees.index = i;
}
}
s->sub.trees.tb = Z_NULL;
{
uInt bl, bd;
inflate_huft *tl, *td;
inflate_codes_statef *c;
bl = 9; /* must be <= 9 for lookahead assumptions */
bd = 6; /* must be <= 9 for lookahead assumptions */
t = s->sub.trees.table;
t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
s->sub.trees.blens, &bl, &bd, &tl, &td,
s->hufts, z);
if (t != Z_OK)
{
if (t == (uInt)Z_DATA_ERROR)
{
ZFREE(z, s->sub.trees.blens);
s->mode = BAD;
}
r = t;
LEAVE
}
Tracev((stderr, "inflate: trees ok\n"));
if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
{
r = Z_MEM_ERROR;
LEAVE
}
s->sub.decode.codes = c;
}
ZFREE(z, s->sub.trees.blens);
s->mode = CODES;
case CODES:
UPDATE
if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
return inflate_flush(s, z, r);
r = Z_OK;
inflate_codes_free(s->sub.decode.codes, z);
LOAD
Tracev((stderr, "inflate: codes end, %lu total out\n",
z->total_out + (q >= s->read ? q - s->read :
(s->end - s->read) + (q - s->window))));
if (!s->last)
{
s->mode = TYPE;
break;
}
s->mode = DRY;
case DRY:
FLUSH
if (s->read != s->write)
LEAVE
s->mode = DONE;
case DONE:
r = Z_STREAM_END;
LEAVE
case BAD:
r = Z_DATA_ERROR;
LEAVE
default:
r = Z_STREAM_ERROR;
LEAVE
}
}
int inflate_blocks_free(s, z)
inflate_blocks_statef *s;
z_streamp z;
{
inflate_blocks_reset(s, z, Z_NULL);
ZFREE(z, s->window);
ZFREE(z, s->hufts);
ZFREE(z, s);
Tracev((stderr, "inflate: blocks freed\n"));
return Z_OK;
}
void inflate_set_dictionary(s, d, n)
inflate_blocks_statef *s;
const Bytef *d;
uInt n;
{
zmemcpy(s->window, d, n);
s->read = s->write = s->window + n;
}
/* Returns true if inflate is currently at the end of a block generated
* by Z_SYNC_FLUSH or Z_FULL_FLUSH.
* IN assertion: s != Z_NULL
*/
int inflate_blocks_sync_point(s)
inflate_blocks_statef *s;
{
return s->mode == LENS;
}

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src/gzip/infblock.h
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/* infblock.h -- header to use infblock.c
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
#ifndef _INFBLOCK_H
#define _INFBLOCK_H
struct inflate_blocks_state;
typedef struct inflate_blocks_state FAR inflate_blocks_statef;
extern inflate_blocks_statef * inflate_blocks_new OF((
z_streamp z,
check_func c, /* check function */
uInt w)); /* window size */
extern int inflate_blocks OF((
inflate_blocks_statef *,
z_streamp ,
int)); /* initial return code */
extern void inflate_blocks_reset OF((
inflate_blocks_statef *,
z_streamp ,
uLongf *)); /* check value on output */
extern int inflate_blocks_free OF((
inflate_blocks_statef *,
z_streamp));
extern void inflate_set_dictionary OF((
inflate_blocks_statef *s,
const Bytef *d, /* dictionary */
uInt n)); /* dictionary length */
extern int inflate_blocks_sync_point OF((
inflate_blocks_statef *s));
#endif /* _INFBLOCK_H */

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src/gzip/infcodes.c
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/* infcodes.c -- process literals and length/distance pairs
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
#include "infblock.h"
#include "infcodes.h"
#include "infutil.h"
/* simplify the use of the inflate_huft type with some defines */
#define exop word.what.Exop
#define bits word.what.Bits
typedef enum { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
START, /* x: set up for LEN */
LEN, /* i: get length/literal/eob next */
LENEXT, /* i: getting length extra (have base) */
DIST, /* i: get distance next */
DISTEXT, /* i: getting distance extra */
COPY, /* o: copying bytes in window, waiting for space */
LIT, /* o: got literal, waiting for output space */
WASH, /* o: got eob, possibly still output waiting */
END, /* x: got eob and all data flushed */
BADCODE} /* x: got error */
inflate_codes_mode;
/* inflate codes private state */
struct inflate_codes_state {
/* mode */
inflate_codes_mode mode; /* current inflate_codes mode */
/* mode dependent information */
uInt len;
union {
struct {
inflate_huft *tree; /* pointer into tree */
uInt need; /* bits needed */
} code; /* if LEN or DIST, where in tree */
uInt lit; /* if LIT, literal */
struct {
uInt get; /* bits to get for extra */
uInt dist; /* distance back to copy from */
} copy; /* if EXT or COPY, where and how much */
} sub; /* submode */
/* mode independent information */
Byte lbits; /* ltree bits decoded per branch */
Byte dbits; /* dtree bits decoder per branch */
inflate_huft *ltree; /* literal/length/eob tree */
inflate_huft *dtree; /* distance tree */
};
inflate_codes_statef *inflate_codes_new(bl, bd, tl, td, z)
uInt bl, bd;
inflate_huft *tl;
inflate_huft *td; /* need separate declaration for Borland C++ */
z_streamp z;
{
inflate_codes_statef *c;
if ((c = (inflate_codes_statef *)
ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL)
{
c->mode = START;
c->lbits = (Byte)bl;
c->dbits = (Byte)bd;
c->ltree = tl;
c->dtree = td;
Tracev((stderr, "inflate: codes new\n"));
}
return c;
}
int inflate_codes(s, z, r)
inflate_blocks_statef *s;
z_streamp z;
int r;
{
uInt j; /* temporary storage */
inflate_huft *t; /* temporary pointer */
uInt e; /* extra bits or operation */
uLong b; /* bit buffer */
uInt k; /* bits in bit buffer */
Bytef *p; /* input data pointer */
uInt n; /* bytes available there */
Bytef *q; /* output window write pointer */
uInt m; /* bytes to end of window or read pointer */
Bytef *f; /* pointer to copy strings from */
inflate_codes_statef *c = s->sub.decode.codes; /* codes state */
/* copy input/output information to locals (UPDATE macro restores) */
LOAD
/* process input and output based on current state */
while (1) switch (c->mode)
{ /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
case START: /* x: set up for LEN */
#ifndef SLOW
if (m >= 258 && n >= 10)
{
UPDATE
r = inflate_fast(c->lbits, c->dbits, c->ltree, c->dtree, s, z);
LOAD
if (r != Z_OK)
{
c->mode = r == Z_STREAM_END ? WASH : BADCODE;
break;
}
}
#endif /* !SLOW */
c->sub.code.need = c->lbits;
c->sub.code.tree = c->ltree;
c->mode = LEN;
case LEN: /* i: get length/literal/eob next */
j = c->sub.code.need;
NEEDBITS(j)
t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
DUMPBITS(t->bits)
e = (uInt)(t->exop);
if (e == 0) /* literal */
{
c->sub.lit = t->base;
Tracevv((stderr, t->base >= 0x20 && t->base < 0x7f ?
"inflate: literal '%c'\n" :
"inflate: literal 0x%02x\n", t->base));
c->mode = LIT;
break;
}
if (e & 16) /* length */
{
c->sub.copy.get = e & 15;
c->len = t->base;
c->mode = LENEXT;
break;
}
if ((e & 64) == 0) /* next table */
{
c->sub.code.need = e;
c->sub.code.tree = t + t->base;
break;
}
if (e & 32) /* end of block */
{
Tracevv((stderr, "inflate: end of block\n"));
c->mode = WASH;
break;
}
c->mode = BADCODE; /* invalid code */
z->msg = (char*)"invalid literal/length code";
r = Z_DATA_ERROR;
LEAVE
case LENEXT: /* i: getting length extra (have base) */
j = c->sub.copy.get;
NEEDBITS(j)
c->len += (uInt)b & inflate_mask[j];
DUMPBITS(j)
c->sub.code.need = c->dbits;
c->sub.code.tree = c->dtree;
Tracevv((stderr, "inflate: length %u\n", c->len));
c->mode = DIST;
case DIST: /* i: get distance next */
j = c->sub.code.need;
NEEDBITS(j)
t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
DUMPBITS(t->bits)
e = (uInt)(t->exop);
if (e & 16) /* distance */
{
c->sub.copy.get = e & 15;
c->sub.copy.dist = t->base;
c->mode = DISTEXT;
break;
}
if ((e & 64) == 0) /* next table */
{
c->sub.code.need = e;
c->sub.code.tree = t + t->base;
break;
}
c->mode = BADCODE; /* invalid code */
z->msg = (char*)"invalid distance code";
r = Z_DATA_ERROR;
LEAVE
case DISTEXT: /* i: getting distance extra */
j = c->sub.copy.get;
NEEDBITS(j)
c->sub.copy.dist += (uInt)b & inflate_mask[j];
DUMPBITS(j)
Tracevv((stderr, "inflate: distance %u\n", c->sub.copy.dist));
c->mode = COPY;
case COPY: /* o: copying bytes in window, waiting for space */
f = q - c->sub.copy.dist;
while (f < s->window) /* modulo window size-"while" instead */
f += s->end - s->window; /* of "if" handles invalid distances */
while (c->len)
{
NEEDOUT
OUTBYTE(*f++)
if (f == s->end)
f = s->window;
c->len--;
}
c->mode = START;
break;
case LIT: /* o: got literal, waiting for output space */
NEEDOUT
OUTBYTE(c->sub.lit)
c->mode = START;
break;
case WASH: /* o: got eob, possibly more output */
if (k > 7) /* return unused byte, if any */
{
Assert(k < 16, "inflate_codes grabbed too many bytes")
k -= 8;
n++;
p--; /* can always return one */
}
FLUSH
if (s->read != s->write)
LEAVE
c->mode = END;
case END:
r = Z_STREAM_END;
LEAVE
case BADCODE: /* x: got error */
r = Z_DATA_ERROR;
LEAVE
default:
r = Z_STREAM_ERROR;
LEAVE
}
#ifdef NEED_DUMMY_RETURN
return Z_STREAM_ERROR; /* Some dumb compilers complain without this */
#endif
}
void inflate_codes_free(c, z)
inflate_codes_statef *c;
z_streamp z;
{
ZFREE(z, c);
Tracev((stderr, "inflate: codes free\n"));
}

31
src/gzip/infcodes.h
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/* infcodes.h -- header to use infcodes.c
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
#ifndef _INFCODES_H
#define _INFCODES_H
struct inflate_codes_state;
typedef struct inflate_codes_state FAR inflate_codes_statef;
extern inflate_codes_statef *inflate_codes_new OF((
uInt, uInt,
inflate_huft *, inflate_huft *,
z_streamp ));
extern int inflate_codes OF((
inflate_blocks_statef *,
z_streamp ,
int));
extern void inflate_codes_free OF((
inflate_codes_statef *,
z_streamp ));
#endif /* _INFCODES_H */

151
src/gzip/inffixed.h
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/* inffixed.h -- table for decoding fixed codes
* Generated automatically by the maketree.c program
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
local uInt fixed_bl = 9;
local uInt fixed_bd = 5;
local inflate_huft fixed_tl[] = {
{{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
{{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},192},
{{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},160},
{{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},224},
{{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},144},
{{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},208},
{{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},176},
{{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},240},
{{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
{{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},200},
{{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},168},
{{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},232},
{{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},152},
{{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},216},
{{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},184},
{{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},248},
{{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
{{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},196},
{{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},164},
{{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},228},
{{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},148},
{{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},212},
{{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},180},
{{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},244},
{{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
{{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},204},
{{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},172},
{{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},236},
{{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},156},
{{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},220},
{{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},188},
{{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},252},
{{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
{{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},194},
{{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},162},
{{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},226},
{{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},146},
{{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},210},
{{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},178},
{{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},242},
{{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
{{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},202},
{{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},170},
{{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},234},
{{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},154},
{{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},218},
{{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},186},
{{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},250},
{{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
{{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},198},
{{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},166},
{{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},230},
{{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},150},
{{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},214},
{{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},182},
{{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},246},
{{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
{{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},206},
{{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},174},
{{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},238},
{{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},158},
{{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},222},
{{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},190},
{{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},254},
{{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
{{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},193},
{{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},161},
{{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},225},
{{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},145},
{{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},209},
{{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},177},
{{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},241},
{{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
{{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},201},
{{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},169},
{{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},233},
{{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},153},
{{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},217},
{{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},185},
{{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},249},
{{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
{{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},197},
{{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},165},
{{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},229},
{{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},149},
{{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},213},
{{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},181},
{{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},245},
{{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
{{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},205},
{{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},173},
{{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},237},
{{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},157},
{{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},221},
{{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},189},
{{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},253},
{{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
{{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},195},
{{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},163},
{{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},227},
{{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},147},
{{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},211},
{{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},179},
{{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},243},
{{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
{{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},203},
{{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},171},
{{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},235},
{{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},155},
{{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},219},
{{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},187},
{{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},251},
{{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
{{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},199},
{{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},167},
{{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},231},
{{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},151},
{{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},215},
{{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},183},
{{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},247},
{{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
{{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},207},
{{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},175},
{{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},239},
{{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},159},
{{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},223},
{{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},191},
{{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},255}
};
local inflate_huft fixed_td[] = {
{{{80,5}},1}, {{{87,5}},257}, {{{83,5}},17}, {{{91,5}},4097},
{{{81,5}},5}, {{{89,5}},1025}, {{{85,5}},65}, {{{93,5}},16385},
{{{80,5}},3}, {{{88,5}},513}, {{{84,5}},33}, {{{92,5}},8193},
{{{82,5}},9}, {{{90,5}},2049}, {{{86,5}},129}, {{{192,5}},24577},
{{{80,5}},2}, {{{87,5}},385}, {{{83,5}},25}, {{{91,5}},6145},
{{{81,5}},7}, {{{89,5}},1537}, {{{85,5}},97}, {{{93,5}},24577},
{{{80,5}},4}, {{{88,5}},769}, {{{84,5}},49}, {{{92,5}},12289},
{{{82,5}},13}, {{{90,5}},3073}, {{{86,5}},193}, {{{192,5}},24577}
};

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/* inflate.c -- zlib interface to inflate modules
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "infblock.h"
#define DONE INFLATE_DONE
#define BAD INFLATE_BAD
typedef enum {
METHOD, /* waiting for method byte */
FLAG, /* waiting for flag byte */
DICT4, /* four dictionary check bytes to go */
DICT3, /* three dictionary check bytes to go */
DICT2, /* two dictionary check bytes to go */
DICT1, /* one dictionary check byte to go */
DICT0, /* waiting for inflateSetDictionary */
BLOCKS, /* decompressing blocks */
CHECK4, /* four check bytes to go */
CHECK3, /* three check bytes to go */
CHECK2, /* two check bytes to go */
CHECK1, /* one check byte to go */
DONE, /* finished check, done */
BAD} /* got an error--stay here */
inflate_mode;
/* inflate private state */
struct internal_state {
/* mode */
inflate_mode mode; /* current inflate mode */
/* mode dependent information */
union {
uInt method; /* if FLAGS, method byte */
struct {
uLong was; /* computed check value */
uLong need; /* stream check value */
} check; /* if CHECK, check values to compare */
uInt marker; /* if BAD, inflateSync's marker bytes count */
} sub; /* submode */
/* mode independent information */
int nowrap; /* flag for no wrapper */
uInt wbits; /* log2(window size) (8..15, defaults to 15) */
inflate_blocks_statef
*blocks; /* current inflate_blocks state */
};
int ZEXPORT inflateReset(z)
z_streamp z;
{
if (z == Z_NULL || z->state == Z_NULL)
return Z_STREAM_ERROR;
z->total_in = z->total_out = 0;
z->msg = Z_NULL;
z->state->mode = z->state->nowrap ? BLOCKS : METHOD;
inflate_blocks_reset(z->state->blocks, z, Z_NULL);
Tracev((stderr, "inflate: reset\n"));
return Z_OK;
}
int ZEXPORT inflateEnd(z)
z_streamp z;
{
if (z == Z_NULL || z->state == Z_NULL || z->zfree == Z_NULL)
return Z_STREAM_ERROR;
if (z->state->blocks != Z_NULL)
inflate_blocks_free(z->state->blocks, z);
ZFREE(z, z->state);
z->state = Z_NULL;
Tracev((stderr, "inflate: end\n"));
return Z_OK;
}
int ZEXPORT inflateInit2_(z, w, version, stream_size)
z_streamp z;
int w;
const char *version;
int stream_size;
{
if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
stream_size != sizeof(z_stream))
return Z_VERSION_ERROR;
/* initialize state */
if (z == Z_NULL)
return Z_STREAM_ERROR;
z->msg = Z_NULL;
if (z->zalloc == Z_NULL)
{
z->zalloc = zcalloc;
z->opaque = (voidpf)0;
}
if (z->zfree == Z_NULL) z->zfree = zcfree;
if ((z->state = (struct internal_state FAR *)
ZALLOC(z,1,sizeof(struct internal_state))) == Z_NULL)
return Z_MEM_ERROR;
z->state->blocks = Z_NULL;
/* handle undocumented nowrap option (no zlib header or check) */
z->state->nowrap = 0;
if (w < 0)
{
w = - w;
z->state->nowrap = 1;
}
/* set window size */
if (w < 8 || w > 15)
{
inflateEnd(z);
return Z_STREAM_ERROR;
}
z->state->wbits = (uInt)w;
/* create inflate_blocks state */
if ((z->state->blocks =
inflate_blocks_new(z, z->state->nowrap ? Z_NULL : adler32, (uInt)1 << w))
== Z_NULL)
{
inflateEnd(z);
return Z_MEM_ERROR;
}
Tracev((stderr, "inflate: allocated\n"));
/* reset state */
inflateReset(z);
return Z_OK;
}
int ZEXPORT inflateInit_(z, version, stream_size)
z_streamp z;
const char *version;
int stream_size;
{
return inflateInit2_(z, DEF_WBITS, version, stream_size);
}
#undef NEEDBYTE
#define NEEDBYTE {if(z->avail_in==0)return r;r=f;}
#undef NEXTBYTE
#define NEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
int ZEXPORT inflate(z, f)
z_streamp z;
int f;
{
int r;
uInt b;
if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL)
return Z_STREAM_ERROR;
f = f == Z_FINISH ? Z_BUF_ERROR : Z_OK;
r = Z_BUF_ERROR;
while (1) switch (z->state->mode)
{
case METHOD:
NEEDBYTE
if (((z->state->sub.method = NEXTBYTE) & 0xf) != Z_DEFLATED)
{
z->state->mode = BAD;
z->msg = (char*)"unknown compression method";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
if ((z->state->sub.method >> 4) + 8 > z->state->wbits)
{
z->state->mode = BAD;
z->msg = (char*)"invalid window size";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
z->state->mode = FLAG;
case FLAG:
NEEDBYTE
b = NEXTBYTE;
if (((z->state->sub.method << 8) + b) % 31)
{
z->state->mode = BAD;
z->msg = (char*)"incorrect header check";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
Tracev((stderr, "inflate: zlib header ok\n"));
if (!(b & PRESET_DICT))
{
z->state->mode = BLOCKS;
break;
}
z->state->mode = DICT4;
case DICT4:
NEEDBYTE
z->state->sub.check.need = (uLong)NEXTBYTE << 24;
z->state->mode = DICT3;
case DICT3:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE << 16;
z->state->mode = DICT2;
case DICT2:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE << 8;
z->state->mode = DICT1;
case DICT1:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE;
z->adler = z->state->sub.check.need;
z->state->mode = DICT0;
return Z_NEED_DICT;
case DICT0:
z->state->mode = BAD;
z->msg = (char*)"need dictionary";
z->state->sub.marker = 0; /* can try inflateSync */
return Z_STREAM_ERROR;
case BLOCKS:
r = inflate_blocks(z->state->blocks, z, r);
if (r == Z_DATA_ERROR)
{
z->state->mode = BAD;
z->state->sub.marker = 0; /* can try inflateSync */
break;
}
if (r == Z_OK)
r = f;
if (r != Z_STREAM_END)
return r;
r = f;
inflate_blocks_reset(z->state->blocks, z, &z->state->sub.check.was);
if (z->state->nowrap)
{
z->state->mode = DONE;
break;
}
z->state->mode = CHECK4;
case CHECK4:
NEEDBYTE
z->state->sub.check.need = (uLong)NEXTBYTE << 24;
z->state->mode = CHECK3;
case CHECK3:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE << 16;
z->state->mode = CHECK2;
case CHECK2:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE << 8;
z->state->mode = CHECK1;
case CHECK1:
NEEDBYTE
z->state->sub.check.need += (uLong)NEXTBYTE;
if (z->state->sub.check.was != z->state->sub.check.need)
{
z->state->mode = BAD;
z->msg = (char*)"incorrect data check";
z->state->sub.marker = 5; /* can't try inflateSync */
break;
}
Tracev((stderr, "inflate: zlib check ok\n"));
z->state->mode = DONE;
case DONE:
return Z_STREAM_END;
case BAD:
return Z_DATA_ERROR;
default:
return Z_STREAM_ERROR;
}
#ifdef NEED_DUMMY_RETURN
return Z_STREAM_ERROR; /* Some dumb compilers complain without this */
#endif
}
int ZEXPORT inflateSetDictionary(z, dictionary, dictLength)
z_streamp z;
const Bytef *dictionary;
uInt dictLength;
{
uInt length = dictLength;
if (z == Z_NULL || z->state == Z_NULL || z->state->mode != DICT0)
return Z_STREAM_ERROR;
if (adler32(1L, dictionary, dictLength) != z->adler) return Z_DATA_ERROR;
z->adler = 1L;
if (length >= ((uInt)1<<z->state->wbits))
{
length = (1<<z->state->wbits)-1;
dictionary += dictLength - length;
}
inflate_set_dictionary(z->state->blocks, dictionary, length);
z->state->mode = BLOCKS;
return Z_OK;
}
int ZEXPORT inflateSync(z)
z_streamp z;
{
uInt n; /* number of bytes to look at */
Bytef *p; /* pointer to bytes */
uInt m; /* number of marker bytes found in a row */
uLong r, w; /* temporaries to save total_in and total_out */
/* set up */
if (z == Z_NULL || z->state == Z_NULL)
return Z_STREAM_ERROR;
if (z->state->mode != BAD)
{
z->state->mode = BAD;
z->state->sub.marker = 0;
}
if ((n = z->avail_in) == 0)
return Z_BUF_ERROR;
p = z->next_in;
m = z->state->sub.marker;
/* search */
while (n && m < 4)
{
static const Byte mark[4] = {0, 0, 0xff, 0xff};
if (*p == mark[m])
m++;
else if (*p)
m = 0;
else
m = 4 - m;
p++, n--;
}
/* restore */
z->total_in += p - z->next_in;
z->next_in = p;
z->avail_in = n;
z->state->sub.marker = m;
/* return no joy or set up to restart on a new block */
if (m != 4)
return Z_DATA_ERROR;
r = z->total_in; w = z->total_out;
inflateReset(z);
z->total_in = r; z->total_out = w;
z->state->mode = BLOCKS;
return Z_OK;
}
/* Returns true if inflate is currently at the end of a block generated
* by Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
* implementation to provide an additional safety check. PPP uses Z_SYNC_FLUSH
* but removes the length bytes of the resulting empty stored block. When
* decompressing, PPP checks that at the end of input packet, inflate is
* waiting for these length bytes.
*/
int ZEXPORT inflateSyncPoint(z)
z_streamp z;
{
if (z == Z_NULL || z->state == Z_NULL || z->state->blocks == Z_NULL)
return Z_STREAM_ERROR;
return inflate_blocks_sync_point(z->state->blocks);
}

453
src/gzip/inftrees.c
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/* inftrees.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "inftrees.h"
#if !defined(BUILDFIXED) && !defined(STDC)
# define BUILDFIXED /* non ANSI compilers may not accept inffixed.h */
#endif
const char inflate_copyright[] =
" inflate 1.1.4 Copyright 1995-2002 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
include such an acknowledgment, I would appreciate that you keep this
copyright string in the executable of your product.
*/
/* simplify the use of the inflate_huft type with some defines */
#define exop word.what.Exop
#define bits word.what.Bits
local int huft_build OF((
uIntf *, /* code lengths in bits */
uInt, /* number of codes */
uInt, /* number of "simple" codes */
const uIntf *, /* list of base values for non-simple codes */
const uIntf *, /* list of extra bits for non-simple codes */
inflate_huft * FAR*,/* result: starting table */
uIntf *, /* maximum lookup bits (returns actual) */
inflate_huft *, /* space for trees */
uInt *, /* hufts used in space */
uIntf * )); /* space for values */
/* Tables for deflate from PKZIP's appnote.txt. */
local const uInt cplens[31] = { /* Copy lengths for literal codes 257..285 */
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
/* see note #13 above about 258 */
local const uInt cplext[31] = { /* Extra bits for literal codes 257..285 */
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112}; /* 112==invalid */
local const uInt cpdist[30] = { /* Copy offsets for distance codes 0..29 */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
8193, 12289, 16385, 24577};
local const uInt cpdext[30] = { /* Extra bits for distance codes */
0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
12, 12, 13, 13};
/*
Huffman code decoding is performed using a multi-level table lookup.
The fastest way to decode is to simply build a lookup table whose
size is determined by the longest code. However, the time it takes
to build this table can also be a factor if the data being decoded
is not very long. The most common codes are necessarily the
shortest codes, so those codes dominate the decoding time, and hence
the speed. The idea is you can have a shorter table that decodes the
shorter, more probable codes, and then point to subsidiary tables for
the longer codes. The time it costs to decode the longer codes is
then traded against the time it takes to make longer tables.
This results of this trade are in the variables lbits and dbits
below. lbits is the number of bits the first level table for literal/
length codes can decode in one step, and dbits is the same thing for
the distance codes. Subsequent tables are also less than or equal to
those sizes. These values may be adjusted either when all of the
codes are shorter than that, in which case the longest code length in
bits is used, or when the shortest code is *longer* than the requested
table size, in which case the length of the shortest code in bits is
used.
There are two different values for the two tables, since they code a
different number of possibilities each. The literal/length table
codes 286 possible values, or in a flat code, a little over eight
bits. The distance table codes 30 possible values, or a little less
than five bits, flat. The optimum values for speed end up being
about one bit more than those, so lbits is 8+1 and dbits is 5+1.
The optimum values may differ though from machine to machine, and
possibly even between compilers. Your mileage may vary.
*/
/* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
#define BMAX 15 /* maximum bit length of any code */
local int huft_build(b, n, s, d, e, t, m, hp, hn, v)
uIntf *b; /* code lengths in bits (all assumed <= BMAX) */
uInt n; /* number of codes (assumed <= 288) */
uInt s; /* number of simple-valued codes (0..s-1) */
const uIntf *d; /* list of base values for non-simple codes */
const uIntf *e; /* list of extra bits for non-simple codes */
inflate_huft * FAR *t; /* result: starting table */
uIntf *m; /* maximum lookup bits, returns actual */
inflate_huft *hp; /* space for trees */
uInt *hn; /* hufts used in space */
uIntf *v; /* working area: values in order of bit length */
/* Given a list of code lengths and a maximum table size, make a set of
tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
if the given code set is incomplete (the tables are still built in this
case), or Z_DATA_ERROR if the input is invalid. */
{
uInt a; /* counter for codes of length k */
uInt c[BMAX+1]; /* bit length count table */
uInt f; /* i repeats in table every f entries */
int g; /* maximum code length */
int h; /* table level */
register uInt i; /* counter, current code */
register uInt j; /* counter */
register int k; /* number of bits in current code */
int l; /* bits per table (returned in m) */
uInt mask; /* (1 << w) - 1, to avoid cc -O bug on HP */
register uIntf *p; /* pointer into c[], b[], or v[] */
inflate_huft *q; /* points to current table */
struct inflate_huft_s r; /* table entry for structure assignment */
inflate_huft *u[BMAX]; /* table stack */
register int w; /* bits before this table == (l * h) */
uInt x[BMAX+1]; /* bit offsets, then code stack */
uIntf *xp; /* pointer into x */
int y; /* number of dummy codes added */
uInt z; /* number of entries in current table */
/* Generate counts for each bit length */
p = c;
#define C0 *p++ = 0;
#define C2 C0 C0 C0 C0
#define C4 C2 C2 C2 C2
C4 /* clear c[]--assume BMAX+1 is 16 */
p = b; i = n;
do {
c[*p++]++; /* assume all entries <= BMAX */
} while (--i);
if (c[0] == n) /* null input--all zero length codes */
{
*t = (inflate_huft *)Z_NULL;
*m = 0;
return Z_OK;
}
/* Find minimum and maximum length, bound *m by those */
l = *m;
for (j = 1; j <= BMAX; j++)
if (c[j])
break;
k = j; /* minimum code length */
if ((uInt)l < j)
l = j;
for (i = BMAX; i; i--)
if (c[i])
break;
g = i; /* maximum code length */
if ((uInt)l > i)
l = i;
*m = l;
/* Adjust last length count to fill out codes, if needed */
for (y = 1 << j; j < i; j++, y <<= 1)
if ((y -= c[j]) < 0)
return Z_DATA_ERROR;
if ((y -= c[i]) < 0)
return Z_DATA_ERROR;
c[i] += y;
/* Generate starting offsets into the value table for each length */
x[1] = j = 0;
p = c + 1; xp = x + 2;
while (--i) { /* note that i == g from above */
*xp++ = (j += *p++);
}
/* Make a table of values in order of bit lengths */
p = b; i = 0;
do {
if ((j = *p++) != 0)
v[x[j]++] = i;
} while (++i < n);
n = x[g]; /* set n to length of v */
/* Generate the Huffman codes and for each, make the table entries */
x[0] = i = 0; /* first Huffman code is zero */
p = v; /* grab values in bit order */
h = -1; /* no tables yet--level -1 */
w = -l; /* bits decoded == (l * h) */
u[0] = (inflate_huft *)Z_NULL; /* just to keep compilers happy */
q = (inflate_huft *)Z_NULL; /* ditto */
z = 0; /* ditto */
/* go through the bit lengths (k already is bits in shortest code) */
for (; k <= g; k++)
{
a = c[k];
while (a--)
{
/* here i is the Huffman code of length k bits for value *p */
/* make tables up to required level */
while (k > w + l)
{
h++;
w += l; /* previous table always l bits */
/* compute minimum size table less than or equal to l bits */
z = g - w;
z = z > (uInt)l ? l : z; /* table size upper limit */
if ((f = 1 << (j = k - w)) > a + 1) /* try a k-w bit table */
{ /* too few codes for k-w bit table */
f -= a + 1; /* deduct codes from patterns left */
xp = c + k;
if (j < z)
while (++j < z) /* try smaller tables up to z bits */
{
if ((f <<= 1) <= *++xp)
break; /* enough codes to use up j bits */
f -= *xp; /* else deduct codes from patterns */
}
}
z = 1 << j; /* table entries for j-bit table */
/* allocate new table */
if (*hn + z > MANY) /* (note: doesn't matter for fixed) */
return Z_DATA_ERROR; /* overflow of MANY */
u[h] = q = hp + *hn;
*hn += z;
/* connect to last table, if there is one */
if (h)
{
x[h] = i; /* save pattern for backing up */
r.bits = (Byte)l; /* bits to dump before this table */
r.exop = (Byte)j; /* bits in this table */
j = i >> (w - l);
r.base = (uInt)(q - u[h-1] - j); /* offset to this table */
u[h-1][j] = r; /* connect to last table */
}
else
*t = q; /* first table is returned result */
}
/* set up table entry in r */
r.bits = (Byte)(k - w);
if (p >= v + n)
r.exop = 128 + 64; /* out of values--invalid code */
else if (*p < s)
{
r.exop = (Byte)(*p < 256 ? 0 : 32 + 64); /* 256 is end-of-block */
r.base = *p++; /* simple code is just the value */
}
else
{
r.exop = (Byte)(e[*p - s] + 16 + 64);/* non-simple--look up in lists */
r.base = d[*p++ - s];
}
/* fill code-like entries with r */
f = 1 << (k - w);
for (j = i >> w; j < z; j += f)
q[j] = r;
/* backwards increment the k-bit code i */
for (j = 1 << (k - 1); i & j; j >>= 1)
i ^= j;
i ^= j;
/* backup over finished tables */
mask = (1 << w) - 1; /* needed on HP, cc -O bug */
while ((i & mask) != x[h])
{
h--; /* don't need to update q */
w -= l;
mask = (1 << w) - 1;
}
}
}
/* Return Z_BUF_ERROR if we were given an incomplete table */
return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
}
int inflate_trees_bits(c, bb, tb, hp, z)
uIntf *c; /* 19 code lengths */
uIntf *bb; /* bits tree desired/actual depth */
inflate_huft * FAR *tb; /* bits tree result */
inflate_huft *hp; /* space for trees */
z_streamp z; /* for messages */
{
int r;
uInt hn = 0; /* hufts used in space */
uIntf *v; /* work area for huft_build */
if ((v = (uIntf*)ZALLOC(z, 19, sizeof(uInt))) == Z_NULL)
return Z_MEM_ERROR;
r = huft_build(c, 19, 19, (uIntf*)Z_NULL, (uIntf*)Z_NULL,
tb, bb, hp, &hn, v);
if (r == Z_DATA_ERROR)
z->msg = (char*)"oversubscribed dynamic bit lengths tree";
else if (r == Z_BUF_ERROR || *bb == 0)
{
z->msg = (char*)"incomplete dynamic bit lengths tree";
r = Z_DATA_ERROR;
}
ZFREE(z, v);
return r;
}
int inflate_trees_dynamic(nl, nd, c, bl, bd, tl, td, hp, z)
uInt nl; /* number of literal/length codes */
uInt nd; /* number of distance codes */
uIntf *c; /* that many (total) code lengths */
uIntf *bl; /* literal desired/actual bit depth */
uIntf *bd; /* distance desired/actual bit depth */
inflate_huft * FAR *tl; /* literal/length tree result */
inflate_huft * FAR *td; /* distance tree result */
inflate_huft *hp; /* space for trees */
z_streamp z; /* for messages */
{
int r;
uInt hn = 0; /* hufts used in space */
uIntf *v; /* work area for huft_build */
/* allocate work area */
if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
return Z_MEM_ERROR;
/* build literal/length tree */
r = huft_build(c, nl, 257, cplens, cplext, tl, bl, hp, &hn, v);
if (r != Z_OK || *bl == 0)
{
if (r == Z_DATA_ERROR)
z->msg = (char*)"oversubscribed literal/length tree";
else if (r != Z_MEM_ERROR)
{
z->msg = (char*)"incomplete literal/length tree";
r = Z_DATA_ERROR;
}
ZFREE(z, v);
return r;
}
/* build distance tree */
r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, hp, &hn, v);
if (r != Z_OK || (*bd == 0 && nl > 257))
{
if (r == Z_DATA_ERROR)
z->msg = (char*)"oversubscribed distance tree";
else if (r == Z_BUF_ERROR) {
#ifdef PKZIP_BUG_WORKAROUND
r = Z_OK;
}
#else
z->msg = (char*)"incomplete distance tree";
r = Z_DATA_ERROR;
}
else if (r != Z_MEM_ERROR)
{
z->msg = (char*)"empty distance tree with lengths";
r = Z_DATA_ERROR;
}
ZFREE(z, v);
return r;
#endif
}
/* done */
ZFREE(z, v);
return Z_OK;
}
/* build fixed tables only once--keep them here */
#ifdef BUILDFIXED
local int fixed_built = 0;
#define FIXEDH 544 /* number of hufts used by fixed tables */
local inflate_huft fixed_mem[FIXEDH];
local uInt fixed_bl;
local uInt fixed_bd;
local inflate_huft *fixed_tl;
local inflate_huft *fixed_td;
#else
#include "inffixed.h"
#endif
int inflate_trees_fixed(bl, bd, tl, td, z)
uIntf *bl; /* literal desired/actual bit depth */
uIntf *bd; /* distance desired/actual bit depth */
inflate_huft * FAR *tl; /* literal/length tree result */
inflate_huft * FAR *td; /* distance tree result */
z_streamp z; /* for memory allocation */
{
#ifdef BUILDFIXED
/* build fixed tables if not already */
if (!fixed_built)
{
int k; /* temporary variable */
uInt f = 0; /* number of hufts used in fixed_mem */
uIntf *c; /* length list for huft_build */
uIntf *v; /* work area for huft_build */
/* allocate memory */
if ((c = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
return Z_MEM_ERROR;
if ((v = (uIntf*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
{
ZFREE(z, c);
return Z_MEM_ERROR;
}
/* literal table */
for (k = 0; k < 144; k++)
c[k] = 8;
for (; k < 256; k++)
c[k] = 9;
for (; k < 280; k++)
c[k] = 7;
for (; k < 288; k++)
c[k] = 8;
fixed_bl = 9;
huft_build(c, 288, 257, cplens, cplext, &fixed_tl, &fixed_bl,
fixed_mem, &f, v);
/* distance table */
for (k = 0; k < 30; k++)
c[k] = 5;
fixed_bd = 5;
huft_build(c, 30, 0, cpdist, cpdext, &fixed_td, &fixed_bd,
fixed_mem, &f, v);
/* done */
ZFREE(z, v);
ZFREE(z, c);
fixed_built = 1;
}
#endif
*bl = fixed_bl;
*bd = fixed_bd;
*tl = fixed_tl;
*td = fixed_td;
return Z_OK;
}

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src/gzip/inftrees.h
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/* inftrees.h -- header to use inftrees.c
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* Huffman code lookup table entry--this entry is four bytes for machines
that have 16-bit pointers (e.g. PC's in the small or medium model). */
#ifndef _INFTREES_H
#define _INFTREES_H
typedef struct inflate_huft_s FAR inflate_huft;
struct inflate_huft_s {
union {
struct {
Byte Exop; /* number of extra bits or operation */
Byte Bits; /* number of bits in this code or subcode */
} what;
uInt pad; /* pad structure to a power of 2 (4 bytes for */
} word; /* 16-bit, 8 bytes for 32-bit int's) */
uInt base; /* literal, length base, distance base,
or table offset */
};
/* Maximum size of dynamic tree. The maximum found in a long but non-
exhaustive search was 1004 huft structures (850 for length/literals
and 154 for distances, the latter actually the result of an
exhaustive search). The actual maximum is not known, but the
value below is more than safe. */
#define MANY 1440
extern int inflate_trees_bits OF((
uIntf *, /* 19 code lengths */
uIntf *, /* bits tree desired/actual depth */
inflate_huft * FAR *, /* bits tree result */
inflate_huft *, /* space for trees */
z_streamp)); /* for messages */
extern int inflate_trees_dynamic OF((
uInt, /* number of literal/length codes */
uInt, /* number of distance codes */
uIntf *, /* that many (total) code lengths */
uIntf *, /* literal desired/actual bit depth */
uIntf *, /* distance desired/actual bit depth */
inflate_huft * FAR *, /* literal/length tree result */
inflate_huft * FAR *, /* distance tree result */
inflate_huft *, /* space for trees */
z_streamp)); /* for messages */
extern int inflate_trees_fixed OF((
uIntf *, /* literal desired/actual bit depth */
uIntf *, /* distance desired/actual bit depth */
inflate_huft * FAR *, /* literal/length tree result */
inflate_huft * FAR *, /* distance tree result */
z_streamp)); /* for memory allocation */
#endif /* _INFTREES_H */

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/* inflate_util.c -- data and routines common to blocks and codes
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zutil.h"
#include "infblock.h"
#include "inftrees.h"
#include "infcodes.h"
#include "infutil.h"
/* And'ing with mask[n] masks the lower n bits */
uInt inflate_mask[17] = {
0x0000,
0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
};
/* copy as much as possible from the sliding window to the output area */
int inflate_flush(s, z, r)
inflate_blocks_statef *s;
z_streamp z;
int r;
{
uInt n;
Bytef *p;
Bytef *q;
/* local copies of source and destination pointers */
p = z->next_out;
q = s->read;
/* compute number of bytes to copy as far as end of window */
n = (uInt)((q <= s->write ? s->write : s->end) - q);
if (n > z->avail_out) n = z->avail_out;
if (n && r == Z_BUF_ERROR) r = Z_OK;
/* update counters */
z->avail_out -= n;
z->total_out += n;
/* update check information */
if (s->checkfn != Z_NULL)
z->adler = s->check = (*s->checkfn)(s->check, q, n);
/* copy as far as end of window */
zmemcpy(p, q, n);
p += n;
q += n;
/* see if more to copy at beginning of window */
if (q == s->end)
{
/* wrap pointers */
q = s->window;
if (s->write == s->end)
s->write = s->window;
/* compute bytes to copy */
n = (uInt)(s->write - q);
if (n > z->avail_out) n = z->avail_out;
if (n && r == Z_BUF_ERROR) r = Z_OK;
/* update counters */
z->avail_out -= n;
z->total_out += n;
/* update check information */
if (s->checkfn != Z_NULL)
z->adler = s->check = (*s->checkfn)(s->check, q, n);
/* copy */
zmemcpy(p, q, n);
p += n;
q += n;
}
/* update pointers */
z->next_out = p;
s->read = q;
/* done */
return r;
}

96
src/gzip/infutil.h
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/* infutil.h -- types and macros common to blocks and codes
* Copyright (C) 1995-2002 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
#ifndef _INFUTIL_H
#define _INFUTIL_H
typedef enum {
TYPE, /* get type bits (3, including end bit) */
LENS, /* get lengths for stored */
STORED, /* processing stored block */
TABLE, /* get table lengths */
BTREE, /* get bit lengths tree for a dynamic block */
DTREE, /* get length, distance trees for a dynamic block */
CODES, /* processing fixed or dynamic block */
DRY, /* output remaining window bytes */
DONE, /* finished last block, done */
BAD} /* got a data error--stuck here */
inflate_block_mode;
/* inflate blocks semi-private state */
struct inflate_blocks_state {
/* mode */
inflate_block_mode mode; /* current inflate_block mode */
/* mode dependent information */
union {
uInt left; /* if STORED, bytes left to copy */
struct {
uInt table; /* table lengths (14 bits) */
uInt index; /* index into blens (or border) */
uIntf *blens; /* bit lengths of codes */
uInt bb; /* bit length tree depth */
inflate_huft *tb; /* bit length decoding tree */
} trees; /* if DTREE, decoding info for trees */
struct {
inflate_codes_statef
*codes;
} decode; /* if CODES, current state */
} sub; /* submode */
uInt last; /* true if this block is the last block */
/* mode independent information */
uInt bitk; /* bits in bit buffer */
uLong bitb; /* bit buffer */
inflate_huft *hufts; /* single malloc for tree space */
Bytef *window; /* sliding window */
Bytef *end; /* one byte after sliding window */
Bytef *read; /* window read pointer */
Bytef *write; /* window write pointer */
check_func checkfn; /* check function */
uLong check; /* check on output */
};
/* defines for inflate input/output */
/* update pointers and return */
#define UPDBITS {s->bitb=b;s->bitk=k;}
#define UPDIN {z->avail_in=n;z->total_in+=p-z->next_in;z->next_in=p;}
#define UPDOUT {s->write=q;}
#define UPDATE {UPDBITS UPDIN UPDOUT}
#define LEAVE {UPDATE return inflate_flush(s,z,r);}
/* get bytes and bits */
#define LOADIN {p=z->next_in;n=z->avail_in;b=s->bitb;k=s->bitk;}
#define NEEDBYTE {if(n)r=Z_OK;else LEAVE}
#define NEXTBYTE (n--,*p++)
#define NEEDBITS(j) {while(k<(j)){NEEDBYTE;b|=((uLong)NEXTBYTE)<<k;k+=8;}}
#define DUMPBITS(j) {b>>=(j);k-=(j);}
/* output bytes */
#define WAVAIL (uInt)(q<s->read?s->read-q-1:s->end-q)
#define LOADOUT {q=s->write;m=(uInt)WAVAIL;}
#define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=(uInt)WAVAIL;}}
#define FLUSH {UPDOUT r=inflate_flush(s,z,r); LOADOUT}
#define NEEDOUT {if(m==0){WRAP if(m==0){FLUSH WRAP if(m==0) LEAVE}}r=Z_OK;}
#define OUTBYTE(a) {*q++=(Byte)(a);m--;}
/* load local pointers */
#define LOAD {LOADIN LOADOUT}
/* masks for lower bits (size given to avoid silly warnings with Visual C++) */
extern uInt inflate_mask[17];
/* copy as much as possible from the sliding window to the output area */
extern int inflate_flush OF((
inflate_blocks_statef *,
z_streamp ,
int));
#endif

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src/gzip/rules.mk
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#
# FreeType 2 GZip support configuration rules
#
# Copyright 2002 by
# David Turner, Robert Wilhelm, and Werner Lemberg.
#
# This file is part of the FreeType project, and may only be used, modified,
# and distributed under the terms of the FreeType project license,
# LICENSE.TXT. By continuing to use, modify, or distribute this file you
# indicate that you have read the license and understand and accept it
# fully.
# gzip driver directory
#
GZIP_DIR := $(SRC_)gzip
GZIP_DIR_ := $(GZIP_DIR)$(SEP)
# compilation flags for the driver
#
GZIP_COMPILE := $(FT_COMPILE) $I$(GZIP_DIR)
# gzip support sources (i.e., C files)
#
GZIP_DRV_SRC := $(GZIP_DIR_)ftgzip.c
# gzip support headers
#
GZIP_DRV_H :=
# Pfr driver object(s)
#
# GZIP_DRV_OBJ_M is used during `multi' builds
# GZIP_DRV_OBJ_S is used during `single' builds
#
GZIP_DRV_OBJ_M := $(GZIP_DRV_SRC:$(GZIP_DIR_)%.c=$(OBJ_)%.$O)
GZIP_DRV_OBJ_S := $(OBJ_)ftgzip.$O
# gzip support source file for single build
#
GZIP_DRV_SRC_S := $(GZIP_DIR_)ftgzip.c
# gzip support - single object
#
$(GZIP_DRV_OBJ_S): $(GZIP_DRV_SRC_S) $(GZIP_DRV_SRC) $(FREETYPE_H) $(GZIP_DRV_H)
$(GZIP_COMPILE) $T$@ $(GZIP_DRV_SRC_S)
# gzip support - multiple objects
#
$(OBJ_)%.$O: $(GZIP_DIR_)%.c $(FREETYPE_H) $(GZIP_DRV_H)
$(GZIP_COMPILE) $T$@ $<
# update main driver object lists
#
DRV_OBJS_S += $(GZIP_DRV_OBJ_S)
DRV_OBJS_M += $(GZIP_DRV_OBJ_M)
# EOF

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src/gzip/zconf.h
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/* zconf.h -- configuration of the zlib compression library
* Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
#ifndef _ZCONF_H
#define _ZCONF_H
/*
* If you *really* need a unique prefix for all types and library functions,
* compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
*/
#ifdef Z_PREFIX
# define deflateInit_ z_deflateInit_
# define deflate z_deflate
# define deflateEnd z_deflateEnd
# define inflateInit_ z_inflateInit_
# define inflate z_inflate
# define inflateEnd z_inflateEnd
# define deflateInit2_ z_deflateInit2_
# define deflateSetDictionary z_deflateSetDictionary
# define deflateCopy z_deflateCopy
# define deflateReset z_deflateReset
# define deflateParams z_deflateParams
# define inflateInit2_ z_inflateInit2_
# define inflateSetDictionary z_inflateSetDictionary
# define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint
# define inflateReset z_inflateReset
# define compress z_compress
# define compress2 z_compress2
# define uncompress z_uncompress
# define adler32 z_adler32
# define crc32 z_crc32
# define get_crc_table z_get_crc_table
# define Byte z_Byte
# define uInt z_uInt
# define uLong z_uLong
# define Bytef z_Bytef
# define charf z_charf
# define intf z_intf
# define uIntf z_uIntf
# define uLongf z_uLongf
# define voidpf z_voidpf
# define voidp z_voidp
#endif
#if (defined(_WIN32) || defined(__WIN32__)) && !defined(WIN32)
# define WIN32
#endif
#if defined(__GNUC__) || defined(WIN32) || defined(__386__) || defined(i386)
# ifndef __32BIT__
# define __32BIT__
# endif
#endif
#if defined(__MSDOS__) && !defined(MSDOS)
# define MSDOS
#endif
/*
* Compile with -DMAXSEG_64K if the alloc function cannot allocate more
* than 64k bytes at a time (needed on systems with 16-bit int).
*/
#if defined(MSDOS) && !defined(__32BIT__)
# define MAXSEG_64K
#endif
#ifdef MSDOS
# define UNALIGNED_OK
#endif
#if (defined(MSDOS) || defined(_WINDOWS) || defined(WIN32)) && !defined(STDC)
# define STDC
#endif
#if defined(__STDC__) || defined(__cplusplus) || defined(__OS2__)
# ifndef STDC
# define STDC
# endif
#endif
#ifndef STDC
# ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
# define const
# endif
#endif
/* Some Mac compilers merge all .h files incorrectly: */
#if defined(__MWERKS__) || defined(applec) ||defined(THINK_C) ||defined(__SC__)
# define NO_DUMMY_DECL
#endif
/* Old Borland C incorrectly complains about missing returns: */
#if defined(__BORLANDC__) && (__BORLANDC__ < 0x500)
# define NEED_DUMMY_RETURN
#endif
/* Maximum value for memLevel in deflateInit2 */
#ifndef MAX_MEM_LEVEL
# ifdef MAXSEG_64K
# define MAX_MEM_LEVEL 8
# else
# define MAX_MEM_LEVEL 9
# endif
#endif
/* Maximum value for windowBits in deflateInit2 and inflateInit2.
* WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
* created by gzip. (Files created by minigzip can still be extracted by
* gzip.)
*/
#ifndef MAX_WBITS
# define MAX_WBITS 15 /* 32K LZ77 window */
#endif
/* The memory requirements for deflate are (in bytes):
(1 << (windowBits+2)) + (1 << (memLevel+9))
that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
plus a few kilobytes for small objects. For example, if you want to reduce
the default memory requirements from 256K to 128K, compile with
make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
Of course this will generally degrade compression (there's no free lunch).
The memory requirements for inflate are (in bytes) 1 << windowBits
that is, 32K for windowBits=15 (default value) plus a few kilobytes
for small objects.
*/
/* Type declarations */
#ifndef OF /* function prototypes */
# ifdef STDC
# define OF(args) args
# else
# define OF(args) ()
# endif
#endif
/* The following definitions for FAR are needed only for MSDOS mixed
* model programming (small or medium model with some far allocations).
* This was tested only with MSC; for other MSDOS compilers you may have
* to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
* just define FAR to be empty.
*/
#if (defined(M_I86SM) || defined(M_I86MM)) && !defined(__32BIT__)
/* MSC small or medium model */
# define SMALL_MEDIUM
# ifdef _MSC_VER
# define FAR _far
# else
# define FAR far
# endif
#endif
#if defined(__BORLANDC__) && (defined(__SMALL__) || defined(__MEDIUM__))
# ifndef __32BIT__
# define SMALL_MEDIUM
# define FAR _far
# endif
#endif
/* Compile with -DZLIB_DLL for Windows DLL support */
#if defined(ZLIB_DLL)
# if defined(_WINDOWS) || defined(WINDOWS)
# ifdef FAR
# undef FAR
# endif
# include <windows.h>
# define ZEXPORT WINAPI
# ifdef WIN32
# define ZEXPORTVA WINAPIV
# else
# define ZEXPORTVA FAR _cdecl _export
# endif
# endif
# if defined (__BORLANDC__)
# if (__BORLANDC__ >= 0x0500) && defined (WIN32)
# include <windows.h>
# define ZEXPORT __declspec(dllexport) WINAPI
# define ZEXPORTRVA __declspec(dllexport) WINAPIV
# else
# if defined (_Windows) && defined (__DLL__)
# define ZEXPORT _export
# define ZEXPORTVA _export
# endif
# endif
# endif
#endif
#if defined (__BEOS__)
# if defined (ZLIB_DLL)
# define ZEXTERN extern __declspec(dllexport)
# else
# define ZEXTERN extern __declspec(dllimport)
# endif
#endif
#ifndef ZEXPORT
# define ZEXPORT
#endif
#ifndef ZEXPORTVA
# define ZEXPORTVA
#endif
#ifndef ZEXTERN
# define ZEXTERN extern
#endif
#ifndef FAR
# define FAR
#endif
#if !defined(MACOS) && !defined(TARGET_OS_MAC)
typedef unsigned char Byte; /* 8 bits */
#endif
typedef unsigned int uInt; /* 16 bits or more */
typedef unsigned long uLong; /* 32 bits or more */
#ifdef SMALL_MEDIUM
/* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
# define Bytef Byte FAR
#else
typedef Byte FAR Bytef;
#endif
typedef char FAR charf;
typedef int FAR intf;
typedef uInt FAR uIntf;
typedef uLong FAR uLongf;
#ifdef STDC
typedef void FAR *voidpf;
typedef void *voidp;
#else
typedef Byte FAR *voidpf;
typedef Byte *voidp;
#endif
#ifdef HAVE_UNISTD_H
# include <sys/types.h> /* for off_t */
# include <unistd.h> /* for SEEK_* and off_t */
# define z_off_t off_t
#endif
#ifndef SEEK_SET
# define SEEK_SET 0 /* Seek from beginning of file. */
# define SEEK_CUR 1 /* Seek from current position. */
# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
#endif
#ifndef z_off_t
# define z_off_t long
#endif
/* MVS linker does not support external names larger than 8 bytes */
#if defined(__MVS__)
# pragma map(deflateInit_,"DEIN")
# pragma map(deflateInit2_,"DEIN2")
# pragma map(deflateEnd,"DEEND")
# pragma map(inflateInit_,"ININ")
# pragma map(inflateInit2_,"ININ2")
# pragma map(inflateEnd,"INEND")
# pragma map(inflateSync,"INSY")
# pragma map(inflateSetDictionary,"INSEDI")
# pragma map(inflate_blocks,"INBL")
# pragma map(inflate_blocks_new,"INBLNE")
# pragma map(inflate_blocks_free,"INBLFR")
# pragma map(inflate_blocks_reset,"INBLRE")
# pragma map(inflate_codes_free,"INCOFR")
# pragma map(inflate_codes,"INCO")
# pragma map(inflate_fast,"INFA")
# pragma map(inflate_flush,"INFLU")
# pragma map(inflate_mask,"INMA")
# pragma map(inflate_set_dictionary,"INSEDI2")
# pragma map(inflate_copyright,"INCOPY")
# pragma map(inflate_trees_bits,"INTRBI")
# pragma map(inflate_trees_dynamic,"INTRDY")
# pragma map(inflate_trees_fixed,"INTRFI")
# pragma map(inflate_trees_free,"INTRFR")
#endif
#endif /* _ZCONF_H */

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/* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.1.4, March 11th, 2002
Copyright (C) 1995-2002 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
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.
Jean-loup Gailly Mark Adler
jloup@gzip.org madler@alumni.caltech.edu
The data format used by the zlib library is described by RFCs (Request for
Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
*/
#ifndef _ZLIB_H
#define _ZLIB_H
#include "zconf.h"
#ifdef __cplusplus
extern "C" {
#endif
#define ZLIB_VERSION "1.1.4"
/*
The 'zlib' compression library provides in-memory compression and
decompression functions, including integrity checks of the uncompressed
data. This version of the library supports only one compression method
(deflation) but other algorithms will be added later and will have the same
stream interface.
Compression can be done in a single step if the buffers are large
enough (for example if an input file is mmap'ed), or can be done by
repeated calls of the compression function. In the latter case, the
application must provide more input and/or consume the output
(providing more output space) before each call.
The library also supports reading and writing files in gzip (.gz) format
with an interface similar to that of stdio.
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.
*/
typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
typedef void (*free_func) OF((voidpf opaque, voidpf address));
struct internal_state;
typedef struct z_stream_s {
Bytef *next_in; /* next input byte */
uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total nb of input bytes read so far */
Bytef *next_out; /* next output byte should be put there */
uInt avail_out; /* remaining free space at next_out */
uLong total_out; /* total nb of bytes output so far */
char *msg; /* last error message, NULL if no error */
struct internal_state FAR *state; /* not visible by applications */
alloc_func zalloc; /* used to allocate the internal state */
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 */
uLong adler; /* adler32 value of the uncompressed data */
uLong reserved; /* reserved for future use */
} z_stream;
typedef z_stream FAR *z_streamp;
/*
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
has dropped to zero. The application must initialize zalloc, zfree and
opaque before calling the init function. All other fields are set by the
compression library and must not be updated by the application.
The opaque value provided by the application will be passed as the first
parameter for calls of zalloc and zfree. This can be useful for custom
memory management. The compression library attaches no meaning to the
opaque value.
zalloc must return Z_NULL if there is not enough memory for the object.
If zlib is used in a multi-threaded application, zalloc and zfree must be
thread safe.
On 16-bit systems, the functions zalloc and zfree must be able to allocate
exactly 65536 bytes, but will not be required to allocate more than this
if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
pointers returned by zalloc for objects of exactly 65536 bytes *must*
have their offset normalized to zero. The default allocation function
provided by this library ensures this (see zutil.c). To reduce memory
requirements and avoid any allocation of 64K objects, at the expense of
compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
The fields total_in and total_out can be used for statistics or
progress reports. After compression, total_in holds the total size of
the uncompressed data and may be saved for use in the decompressor
(particularly if the decompressor wants to decompress everything in
a single step).
*/
/* constants */
#define Z_NO_FLUSH 0
#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
#define Z_SYNC_FLUSH 2
#define Z_FULL_FLUSH 3
#define Z_FINISH 4
/* Allowed flush values; see deflate() below for details */
#define Z_OK 0
#define Z_STREAM_END 1
#define Z_NEED_DICT 2
#define Z_ERRNO (-1)
#define Z_STREAM_ERROR (-2)
#define Z_DATA_ERROR (-3)
#define Z_MEM_ERROR (-4)
#define Z_BUF_ERROR (-5)
#define Z_VERSION_ERROR (-6)
/* Return codes for the compression/decompression functions. Negative
* values are errors, positive values are used for special but normal events.
*/
#define Z_NO_COMPRESSION 0
#define Z_BEST_SPEED 1
#define Z_BEST_COMPRESSION 9
#define Z_DEFAULT_COMPRESSION (-1)
/* compression levels */
#define Z_FILTERED 1
#define Z_HUFFMAN_ONLY 2
#define Z_DEFAULT_STRATEGY 0
/* compression strategy; see deflateInit2() below for details */
#define Z_BINARY 0
#define Z_ASCII 1
#define Z_UNKNOWN 2
/* Possible values of the data_type field */
#define Z_DEFLATED 8
/* The deflate compression method (the only one supported in this version) */
#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
#define zlib_version zlibVersion()
/* for compatibility with versions < 1.0.2 */
/* basic functions */
ZEXTERN const char * ZEXPORT zlibVersion OF((void));
/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
If the first character differs, the library code actually used is
not compatible with the zlib.h header file used by the application.
This check is automatically made by deflateInit and inflateInit.
*/
/*
ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
Initializes the internal stream state for compression. The fields
zalloc, zfree and opaque must be initialized before by the caller.
If zalloc and zfree are set to Z_NULL, deflateInit updates them to
use default allocation functions.
The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
1 gives best speed, 9 gives best compression, 0 gives no compression at
all (the input data is simply copied a block at a time).
Z_DEFAULT_COMPRESSION requests a default compromise between speed and
compression (currently equivalent to level 6).
deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_STREAM_ERROR if level is not a valid compression level,
Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
with the version assumed by the caller (ZLIB_VERSION).
msg is set to null if there is no error message. deflateInit does not
perform any compression: this will be done by deflate().
*/
ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
/*
deflate compresses as much data as possible, and stops when the input
buffer becomes empty or the output buffer becomes full. It may introduce some
output latency (reading input without producing any output) except when
forced to flush.
The detailed semantics are as follows. deflate performs one or both of the
following actions:
- Compress more input starting at next_in and update next_in and avail_in
accordingly. If not all input can be processed (because there is not
enough room in the output buffer), next_in and avail_in are updated and
processing will resume at this point for the next call of deflate().
- Provide more output starting at next_out and update next_out and avail_out
accordingly. This action is forced if the parameter flush is non zero.
Forcing flush frequently degrades the compression ratio, so this parameter
should be set only when necessary (in interactive applications).
Some output may be provided even if flush is not set.
Before the call of deflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming
more output, and updating avail_in or avail_out accordingly; avail_out
should never be zero before the call. The application can consume the
compressed output when it wants, for example when the output buffer is full
(avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
and with zero avail_out, it must be called again after making room in the
output buffer because there might be more output pending.
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
avail_in is zero after the call if enough output space has been provided
before the call.) Flushing may degrade compression for some compression
algorithms and so it should be used only when necessary.
If flush is set to Z_FULL_FLUSH, all output is flushed as with
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.
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
avail_out), until the flush is complete (deflate returns with non-zero
avail_out).
If the parameter flush is set to Z_FINISH, pending input is processed,
pending output is flushed and deflate returns with Z_STREAM_END if there
was enough output space; if deflate returns with Z_OK, this function must be
called again with Z_FINISH and more output space (updated avail_out) but no
more input data, until it returns with Z_STREAM_END or an error. After
deflate has returned Z_STREAM_END, the only possible operations on the
stream are deflateReset or deflateEnd.
Z_FINISH can be used immediately after deflateInit if all the compression
is to be done in a single step. In this case, avail_out must be at least
0.1% larger than avail_in plus 12 bytes. If deflate does not return
Z_STREAM_END, then it must be called again as described above.
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
binary. This field is only for information purposes and does not affect
the compression algorithm in any manner.
deflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if all input has been
consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
(for example avail_in or avail_out was zero).
*/
ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
/*
All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any
pending output.
deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
stream state was inconsistent, Z_DATA_ERROR if the stream was freed
prematurely (some input or output was discarded). In the error case,
msg may be set but then points to a static string (which must not be
deallocated).
*/
/*
ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
Initializes the internal stream state for decompression. The fields
next_in, avail_in, zalloc, zfree and opaque must be initialized before by
the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
value depends on the compression method), inflateInit determines the
compression method from the zlib header and allocates all data structures
accordingly; otherwise the allocation will be deferred to the first call of
inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
use default allocation functions.
inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
version assumed by the caller. msg is set to null if there is no error
message. inflateInit 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 inflate OF((z_streamp strm, int flush));
/*
inflate decompresses as much data as possible, and stops when the input
buffer becomes empty or the output buffer becomes full. It may some
introduce some output latency (reading input without producing any output)
except when forced to flush.
The detailed semantics are as follows. inflate performs one or both of the
following actions:
- Decompress more input starting at next_in and update next_in and avail_in
accordingly. If not all input can be processed (because there is not
enough room in the output buffer), next_in is updated and processing
will resume at this point for the next call of inflate().
- Provide more output starting at next_out and update next_out and avail_out
accordingly. inflate() provides as much output as possible, until there
is no more input data or no more space in the output buffer (see below
about the flush parameter).
Before the call of inflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming
more output, and updating the next_* and avail_* values accordingly.
The application can consume the uncompressed output when it wants, for
example when the output buffer is full (avail_out == 0), or after each
call of inflate(). If inflate returns Z_OK and with zero avail_out, it
must be called again after making room in the output buffer because there
might be more output pending.
If the parameter flush is set to Z_SYNC_FLUSH, inflate flushes as much
output as possible to the output buffer. The flushing behavior of inflate is
not specified for values of the flush parameter other than Z_SYNC_FLUSH
and Z_FINISH, but the current implementation actually flushes as much output
as possible anyway.
inflate() should normally be called until it returns Z_STREAM_END or an
error. However if all decompression is to be performed in a single step
(a single call of inflate), the parameter flush should be set to
Z_FINISH. In this case all pending input is processed and all pending
output is flushed; avail_out must be large enough to hold all the
uncompressed data. (The size of the uncompressed data may have been saved
by the compressor for this purpose.) The next operation on this stream must
be inflateEnd to deallocate the decompression state. The use of Z_FINISH
is never required, but can be used to inform inflate that a faster routine
may be used for the single inflate() call.
If a preset dictionary is needed at this point (see inflateSetDictionary
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 below. At the end of the stream, inflate()
checks that its computed adler32 checksum is equal to that saved by the
compressor and returns Z_STREAM_END only if the checksum is correct.
inflate() returns Z_OK if some progress has been made (more input processed
or more output produced), Z_STREAM_END if the end of the compressed data has
been reached and all uncompressed output has been produced, Z_NEED_DICT if a
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
corrupted (input stream not conforming to the zlib format or incorrect
adler32 checksum), Z_STREAM_ERROR if the stream structure was inconsistent
(for example if next_in or next_out was NULL), Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if no progress is possible or if there was not
enough room in the output buffer when Z_FINISH is used. In the Z_DATA_ERROR
case, the application may then call inflateSync to look for a good
compression block.
*/
ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
/*
All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any
pending output.
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
was inconsistent. In the error case, msg may be set but then points to a
static string (which must not be deallocated).
*/
/* Advanced functions */
/*
The following functions are needed only in some special applications.
*/
/*
ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
int level,
int method,
int windowBits,
int memLevel,
int strategy));
This is another version of deflateInit with more compression options. The
fields next_in, zalloc, zfree and opaque must be initialized before by
the caller.
The method parameter is the compression method. It must be Z_DEFLATED in
this version of the library.
The windowBits parameter is the base two logarithm of the window size
(the size of the history buffer). It should be in the range 8..15 for this
version of the library. Larger values of this parameter result in better
compression at the expense of memory usage. The default value is 15 if
deflateInit is used instead.
The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but
is slow and reduces compression ratio; memLevel=9 uses maximum memory
for optimal speed. The default value is 8. See zconf.h for total memory
usage as a function of windowBits and memLevel.
The strategy parameter is used to tune the compression algorithm. Use the
value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no
string match). Filtered data consists mostly of small values with a
somewhat random distribution. In this case, the compression algorithm is
tuned to compress them better. The effect of Z_FILTERED is to force more
Huffman coding and less string matching; it is somewhat intermediate
between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects
the compression ratio but not the correctness of the compressed output even
if it is not set appropriately.
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
method). msg is set to null if there is no error message. deflateInit2 does
not perform any compression: this will be done by deflate().
*/
ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
const Bytef *dictionary,
uInt dictLength));
/*
Initializes the compression dictionary from the given byte sequence
without producing any compressed output. This function must be called
immediately after deflateInit, deflateInit2 or deflateReset, before any
call of deflate. The compressor and decompressor must use exactly the same
dictionary (see inflateSetDictionary).
The dictionary should consist of strings (byte sequences) that are likely
to be encountered later in the data to be compressed, with the most commonly
used strings preferably put towards the end of the dictionary. Using a
dictionary is most useful when the data to be compressed is short and can be
predicted with good accuracy; the data can then be compressed better than
with the default empty dictionary.
Depending on the size of the compression data structures selected by
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.
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
which dictionary has been used by the compressor. (The Adler32 value
applies to the whole dictionary even if only a subset of the dictionary is
actually used by the compressor.)
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is
inconsistent (for example if deflate has already been called for this stream
or if the compression method is bsort). deflateSetDictionary does not
perform any compression: this will be done by deflate().
*/
ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
z_streamp source));
/*
Sets the destination stream as a complete copy of the source stream.
This function can be useful when several compression strategies will be
tried, for example when there are several ways of pre-processing the input
data with a filter. The streams that will be discarded should then be freed
by calling deflateEnd. Note that deflateCopy duplicates the internal
compression state which can be quite large, so this strategy is slow and
can consume lots of memory.
deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
(such as zalloc being NULL). msg is left unchanged in both source and
destination.
*/
ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
/*
This function is equivalent to deflateEnd followed by deflateInit,
but does not free and reallocate all the internal compression state.
The stream will keep the same compression level and any other attributes
that may have been set by deflateInit2.
deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being NULL).
*/
ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
int level,
int strategy));
/*
Dynamically update the compression level and compression strategy. The
interpretation of level and strategy is as in deflateInit2. This can be
used to switch between compression and straight copy of the input data, or
to switch to a different kind of input data requiring a different
strategy. If the compression level is changed, the input available so far
is compressed with the old level (and may be flushed); the new level will
take effect only at the next call of deflate().
Before the call of deflateParams, the stream state must be set as for
a call of deflate(), since the currently available input may have to
be compressed and flushed. In particular, strm->avail_out must be non-zero.
deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
if strm->avail_out was zero.
*/
/*
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
int windowBits));
This is another version of inflateInit with an extra parameter. The
fields next_in, avail_in, zalloc, zfree and opaque must be initialized
before by the caller.
The windowBits parameter is the base two logarithm of the maximum window
size (the size of the history buffer). It should be in the range 8..15 for
this version of the library. The default value is 15 if inflateInit is used
instead. If a compressed stream with a larger window size is given as
input, inflate() will return with the error code Z_DATA_ERROR instead of
trying to allocate a larger window.
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.)
*/
ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
const Bytef *dictionary,
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).
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
expected one (incorrect Adler32 value). inflateSetDictionary does not
perform any decompression: this will be done by subsequent calls of
inflate().
*/
ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
/*
Skips invalid compressed data until a full flush point (see above the
description of deflate with Z_FULL_FLUSH) can be found, or until all
available input is skipped. No output is provided.
inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
if no more input was provided, Z_DATA_ERROR if no flush point has been found,
or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
case, the application may save the current current value of total_in which
indicates where valid compressed data was found. In the error case, the
application may repeatedly call inflateSync, providing more input each time,
until success or end of the input data.
*/
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
/*
This function is equivalent to inflateEnd followed by inflateInit,
but does not free and reallocate all the internal decompression state.
The stream will keep attributes that may have been set by inflateInit2.
inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being NULL).
*/
/* utility functions */
/*
The following utility functions are implemented on top of the
basic stream-oriented functions. To simplify the interface, some
default options are assumed (compression level and memory usage,
standard memory allocation functions). The source code of these
utility functions can easily be modified if you need special options.
*/
ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen));
/*
Compresses the source buffer into the destination buffer. sourceLen is
the byte length of the source buffer. Upon entry, destLen is the total
size of the destination buffer, which must be at least 0.1% larger than
sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
compressed buffer.
This function can be used to compress a whole file at once if the
input file is mmap'ed.
compress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output
buffer.
*/
ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen,
int level));
/*
Compresses the source buffer into the destination buffer. The level
parameter has the same meaning as in deflateInit. sourceLen is the byte
length of the source buffer. Upon entry, destLen is the total size of the
destination buffer, which must be at least 0.1% larger than sourceLen plus
12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_BUF_ERROR if there was not enough room in the output buffer,
Z_STREAM_ERROR if the level parameter is invalid.
*/
ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen));
/*
Decompresses the source buffer into the destination buffer. sourceLen is
the byte length of the source buffer. Upon entry, destLen is the total
size of the destination buffer, which must be large enough to hold the
entire uncompressed data. (The size of the uncompressed data must have
been saved previously by the compressor and transmitted to the decompressor
by some mechanism outside the scope of this compression library.)
Upon exit, destLen is the actual size of the compressed buffer.
This function can be used to decompress a whole file at once if the
input file is mmap'ed.
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output
buffer, or Z_DATA_ERROR if the input data was corrupted.
*/
typedef voidp gzFile;
ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
/*
Opens a gzip (.gz) file for reading or writing. The mode parameter
is as in fopen ("rb" or "wb") but can also include a compression level
("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
Huffman only compression as in "wb1h". (See the description
of deflateInit2 for more information about the strategy parameter.)
gzopen can be used to read a file which is not in gzip format; in this
case gzread will directly read from the file without decompression.
gzopen returns NULL if the file could not be opened or if there was
insufficient memory to allocate the (de)compression state; errno
can be checked to distinguish the two cases (if errno is zero, the
zlib error is Z_MEM_ERROR). */
ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
/*
gzdopen() associates a gzFile with the file descriptor fd. File
descriptors are obtained from calls like open, dup, creat, pipe or
fileno (in the file has been previously opened with fopen).
The mode parameter is as in gzopen.
The next call of gzclose on the returned gzFile will also close the
file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
gzdopen returns NULL if there was insufficient memory to allocate
the (de)compression state.
*/
ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
/*
Dynamically update the compression level or strategy. See the description
of deflateInit2 for the meaning of these parameters.
gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
opened for writing.
*/
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
/*
Reads the given number of uncompressed bytes from the compressed file.
If the input file was not in gzip format, gzread copies the given number
of bytes into the buffer.
gzread returns the number of uncompressed bytes actually read (0 for
end of file, -1 for error). */
ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
const voidp buf, unsigned len));
/*
Writes the given number of uncompressed bytes into the compressed file.
gzwrite returns the number of uncompressed bytes actually written
(0 in case of error).
*/
ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
/*
Converts, formats, and writes the args to the compressed file under
control of the format string, as in fprintf. gzprintf returns the number of
uncompressed bytes actually written (0 in case of error).
*/
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
/*
Writes the given null-terminated string to the compressed file, excluding
the terminating null character.
gzputs returns the number of characters written, or -1 in case of error.
*/
ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
/*
Reads bytes from the compressed file until len-1 characters are read, or
a newline character is read and transferred to buf, or an end-of-file
condition is encountered. The string is then terminated with a null
character.
gzgets returns buf, or Z_NULL in case of error.
*/
ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
/*
Writes c, converted to an unsigned char, into the compressed file.
gzputc returns the value that was written, or -1 in case of error.
*/
ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
/*
Reads one byte from the compressed file. gzgetc returns this byte
or -1 in case of end of file or error.
*/
ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
/*
Flushes all pending output into the compressed file. The parameter
flush is as in the deflate() function. The return value is the zlib
error number (see function gzerror below). gzflush returns Z_OK if
the flush parameter is Z_FINISH and all output could be flushed.
gzflush should be called only when strictly necessary because it can
degrade compression.
*/
ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
z_off_t offset, int whence));
/*
Sets the starting position for the next gzread or gzwrite on the
given compressed file. The offset represents a number of bytes in the
uncompressed data stream. The whence parameter is defined as in lseek(2);
the value SEEK_END is not supported.
If the file is opened for reading, this function is emulated but can be
extremely slow. If the file is opened for writing, only forward seeks are
supported; gzseek then compresses a sequence of zeroes up to the new
starting position.
gzseek returns the resulting offset location as measured in bytes from
the beginning of the uncompressed stream, or -1 in case of error, in
particular if the file is opened for writing and the new starting position
would be before the current position.
*/
ZEXTERN int ZEXPORT gzrewind OF((gzFile file));
/*
Rewinds the given file. This function is supported only for reading.
gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
*/
ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));
/*
Returns the starting position for the next gzread or gzwrite on the
given compressed file. This position represents a number of bytes in the
uncompressed data stream.
gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
*/
ZEXTERN int ZEXPORT gzeof OF((gzFile file));
/*
Returns 1 when EOF has previously been detected reading the given
input stream, otherwise zero.
*/
ZEXTERN int ZEXPORT gzclose OF((gzFile file));
/*
Flushes all pending output if necessary, closes the compressed file
and deallocates all the (de)compression state. The return value is the zlib
error number (see function gzerror below).
*/
ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
/*
Returns the error message for the last error which occurred on the
given compressed file. errnum is set to zlib error number. If an
error occurred in the file system and not in the compression library,
errnum is set to Z_ERRNO and the application may consult errno
to get the exact error code.
*/
/* checksum functions */
/*
These functions are not related to compression but are exported
anyway because they might be useful in applications using the
compression library.
*/
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
the required initial value for the checksum.
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
much faster. Usage example:
uLong adler = adler32(0L, Z_NULL, 0);
while (read_buffer(buffer, length) != EOF) {
adler = adler32(adler, buffer, length);
}
if (adler != original_adler) error();
*/
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.
Usage example:
uLong crc = crc32(0L, Z_NULL, 0);
while (read_buffer(buffer, length) != EOF) {
crc = crc32(crc, buffer, length);
}
if (crc != original_crc) error();
*/
/* various hacks, don't look :) */
/* deflateInit and inflateInit are macros to allow checking the zlib version
* and the compiler's view of z_stream:
*/
ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
const char *version, int stream_size));
ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
const char *version, int stream_size));
ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
int windowBits, int memLevel,
int strategy, const char *version,
int stream_size));
ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
const char *version, int stream_size));
#define deflateInit(strm, level) \
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
#define inflateInit(strm) \
inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
(strategy), ZLIB_VERSION, sizeof(z_stream))
#define inflateInit2(strm, windowBits) \
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
ZEXTERN const char * ZEXPORT zError OF((int err));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
#ifdef __cplusplus
}
#endif
#endif /* _ZLIB_H */

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/* zutil.c -- target dependent utility functions for the compression library
* Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* @(#) $Id$ */
#include "zutil.h"
#ifndef STDC
extern void exit OF((int));
#endif
const char *z_errmsg[10] = {
"need dictionary", /* Z_NEED_DICT 2 */
"stream end", /* Z_STREAM_END 1 */
"", /* Z_OK 0 */
"file error", /* Z_ERRNO (-1) */
"stream error", /* Z_STREAM_ERROR (-2) */
"data error", /* Z_DATA_ERROR (-3) */
"insufficient memory", /* Z_MEM_ERROR (-4) */
"buffer error", /* Z_BUF_ERROR (-5) */
"incompatible version",/* Z_VERSION_ERROR (-6) */
""};
const char * ZEXPORT zlibVersion()
{
return ZLIB_VERSION;
}
#ifdef DEBUG
# ifndef verbose
# define verbose 0
# endif
int z_verbose = verbose;
void z_error (m)
char *m;
{
fprintf(stderr, "%s\n", m);
exit(1);
}
#endif
/* exported to allow conversion of error code to string for compress() and
* uncompress()
*/
const char * ZEXPORT zError(err)
int err;
{
return ERR_MSG(err);
}
#ifndef HAVE_MEMCPY
void zmemcpy(dest, source, len)
Bytef* dest;
const Bytef* source;
uInt len;
{
if (len == 0) return;
do {
*dest++ = *source++; /* ??? to be unrolled */
} while (--len != 0);
}
int zmemcmp(s1, s2, len)
const Bytef* s1;
const Bytef* s2;
uInt len;
{
uInt j;
for (j = 0; j < len; j++) {
if (s1[j] != s2[j]) return 2*(s1[j] > s2[j])-1;
}
return 0;
}
void zmemzero(dest, len)
Bytef* dest;
uInt len;
{
if (len == 0) return;
do {
*dest++ = 0; /* ??? to be unrolled */
} while (--len != 0);
}
#endif
#ifdef __TURBOC__
#if (defined( __BORLANDC__) || !defined(SMALL_MEDIUM)) && !defined(__32BIT__)
/* Small and medium model in Turbo C are for now limited to near allocation
* with reduced MAX_WBITS and MAX_MEM_LEVEL
*/
# define MY_ZCALLOC
/* Turbo C malloc() does not allow dynamic allocation of 64K bytes
* and farmalloc(64K) returns a pointer with an offset of 8, so we
* must fix the pointer. Warning: the pointer must be put back to its
* original form in order to free it, use zcfree().
*/
#define MAX_PTR 10
/* 10*64K = 640K */
local int next_ptr = 0;
typedef struct ptr_table_s {
voidpf org_ptr;
voidpf new_ptr;
} ptr_table;
local ptr_table table[MAX_PTR];
/* This table is used to remember the original form of pointers
* to large buffers (64K). Such pointers are normalized with a zero offset.
* Since MSDOS is not a preemptive multitasking OS, this table is not
* protected from concurrent access. This hack doesn't work anyway on
* a protected system like OS/2. Use Microsoft C instead.
*/
voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
{
voidpf buf = opaque; /* just to make some compilers happy */
ulg bsize = (ulg)items*size;
/* If we allocate less than 65520 bytes, we assume that farmalloc
* will return a usable pointer which doesn't have to be normalized.
*/
if (bsize < 65520L) {
buf = farmalloc(bsize);
if (*(ush*)&buf != 0) return buf;
} else {
buf = farmalloc(bsize + 16L);
}
if (buf == NULL || next_ptr >= MAX_PTR) return NULL;
table[next_ptr].org_ptr = buf;
/* Normalize the pointer to seg:0 */
*((ush*)&buf+1) += ((ush)((uch*)buf-0) + 15) >> 4;
*(ush*)&buf = 0;
table[next_ptr++].new_ptr = buf;
return buf;
}
void zcfree (voidpf opaque, voidpf ptr)
{
int n;
if (*(ush*)&ptr != 0) { /* object < 64K */
farfree(ptr);
return;
}
/* Find the original pointer */
for (n = 0; n < next_ptr; n++) {
if (ptr != table[n].new_ptr) continue;
farfree(table[n].org_ptr);
while (++n < next_ptr) {
table[n-1] = table[n];
}
next_ptr--;
return;
}
ptr = opaque; /* just to make some compilers happy */
Assert(0, "zcfree: ptr not found");
}
#endif
#endif /* __TURBOC__ */
#if defined(M_I86) && !defined(__32BIT__)
/* Microsoft C in 16-bit mode */
# define MY_ZCALLOC
#if (!defined(_MSC_VER) || (_MSC_VER <= 600))
# define _halloc halloc
# define _hfree hfree
#endif
voidpf zcalloc (voidpf opaque, unsigned items, unsigned size)
{
if (opaque) opaque = 0; /* to make compiler happy */
return _halloc((long)items, size);
}
void zcfree (voidpf opaque, voidpf ptr)
{
if (opaque) opaque = 0; /* to make compiler happy */
_hfree(ptr);
}
#endif /* MSC */
#ifndef MY_ZCALLOC /* Any system without a special alloc function */
#ifndef STDC
extern voidp calloc OF((uInt items, uInt size));
extern void free OF((voidpf ptr));
#endif
voidpf zcalloc (opaque, items, size)
voidpf opaque;
unsigned items;
unsigned size;
{
if (opaque) items += size - size; /* make compiler happy */
return (voidpf)calloc(items, size);
}
void zcfree (opaque, ptr)
voidpf opaque;
voidpf ptr;
{
free(ptr);
if (opaque) return; /* make compiler happy */
}
#endif /* MY_ZCALLOC */

220
src/gzip/zutil.h
Unescape View File

@ -0,0 +1,220 @@
/* zutil.h -- internal interface and configuration of the compression library
* Copyright (C) 1995-2002 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* WARNING: this file should *not* be used by applications. It is
part of the implementation of the compression library and is
subject to change. Applications should only use zlib.h.
*/
/* @(#) $Id$ */
#ifndef _Z_UTIL_H
#define _Z_UTIL_H
#include "zlib.h"
#ifdef STDC
# include <stddef.h>
# include <string.h>
# include <stdlib.h>
#endif
#ifdef NO_ERRNO_H
extern int errno;
#else
# include <errno.h>
#endif
#ifndef local
# define local static
#endif
/* compile with -Dlocal if your debugger can't find static symbols */
typedef unsigned char uch;
typedef uch FAR uchf;
typedef unsigned short ush;
typedef ush FAR ushf;
typedef unsigned long ulg;
extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
/* (size given to avoid silly warnings with Visual C++) */
#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
#define ERR_RETURN(strm,err) \
return (strm->msg = (char*)ERR_MSG(err), (err))
/* To be used only when the state is known to be valid */
/* common constants */
#ifndef DEF_WBITS
# define DEF_WBITS MAX_WBITS
#endif
/* default windowBits for decompression. MAX_WBITS is for compression only */
#if MAX_MEM_LEVEL >= 8
# define DEF_MEM_LEVEL 8
#else
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
#endif
/* default memLevel */
#define STORED_BLOCK 0
#define STATIC_TREES 1
#define DYN_TREES 2
/* The three kinds of block type */
#define MIN_MATCH 3
#define MAX_MATCH 258
/* The minimum and maximum match lengths */
#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
/* target dependencies */
#ifdef MSDOS
# define OS_CODE 0x00
# if defined(__TURBOC__) || defined(__BORLANDC__)
# if(__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
/* Allow compilation with ANSI keywords only enabled */
void _Cdecl farfree( void *block );
void *_Cdecl farmalloc( unsigned long nbytes );
# else
# include <alloc.h>
# endif
# else /* MSC or DJGPP */
# include <malloc.h>
# endif
#endif
#ifdef OS2
# define OS_CODE 0x06
#endif
#ifdef WIN32 /* Window 95 & Windows NT */
# define OS_CODE 0x0b
#endif
#if defined(VAXC) || defined(VMS)
# define OS_CODE 0x02
# define F_OPEN(name, mode) \
fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
#endif
#ifdef AMIGA
# define OS_CODE 0x01
#endif
#if defined(ATARI) || defined(atarist)
# define OS_CODE 0x05
#endif
#if defined(MACOS) || defined(TARGET_OS_MAC)
# define OS_CODE 0x07
# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
# include <unix.h> /* for fdopen */
# else
# ifndef fdopen
# define fdopen(fd,mode) NULL /* No fdopen() */
# endif
# endif
#endif
#ifdef __50SERIES /* Prime/PRIMOS */
# define OS_CODE 0x0F
#endif
#ifdef TOPS20
# define OS_CODE 0x0a
#endif
#if defined(_BEOS_) || defined(RISCOS)
# define fdopen(fd,mode) NULL /* No fdopen() */
#endif
#if (defined(_MSC_VER) && (_MSC_VER > 600))
# define fdopen(fd,type) _fdopen(fd,type)
#endif
/* Common defaults */
#ifndef OS_CODE
# define OS_CODE 0x03 /* assume Unix */
#endif
#ifndef F_OPEN
# define F_OPEN(name, mode) fopen((name), (mode))
#endif
/* functions */
#ifdef HAVE_STRERROR
extern char *strerror OF((int));
# define zstrerror(errnum) strerror(errnum)
#else
# define zstrerror(errnum) ""
#endif
#if defined(pyr)
# define NO_MEMCPY
#endif
#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
/* Use our own functions for small and medium model with MSC <= 5.0.
* You may have to use the same strategy for Borland C (untested).
* The __SC__ check is for Symantec.
*/
# define NO_MEMCPY
#endif
#if defined(STDC) && !defined(HAVE_MEMCPY) && !defined(NO_MEMCPY)
# define HAVE_MEMCPY
#endif
#ifdef HAVE_MEMCPY
# ifdef SMALL_MEDIUM /* MSDOS small or medium model */
# define zmemcpy _fmemcpy
# define zmemcmp _fmemcmp
# define zmemzero(dest, len) _fmemset(dest, 0, len)
# else
# define zmemcpy memcpy
# define zmemcmp memcmp
# define zmemzero(dest, len) memset(dest, 0, len)
# endif
#else
extern void zmemcpy OF((Bytef* dest, const Bytef* source, uInt len));
extern int zmemcmp OF((const Bytef* s1, const Bytef* s2, uInt len));
extern void zmemzero OF((Bytef* dest, uInt len));
#endif
/* Diagnostic functions */
#ifdef DEBUG
# include <stdio.h>
extern int z_verbose;
extern void z_error OF((char *m));
# define Assert(cond,msg) {if(!(cond)) z_error(msg);}
# define Trace(x) {if (z_verbose>=0) fprintf x ;}
# define Tracev(x) {if (z_verbose>0) fprintf x ;}
# define Tracevv(x) {if (z_verbose>1) fprintf x ;}
# define Tracec(c,x) {if (z_verbose>0 && (c)) fprintf x ;}
# define Tracecv(c,x) {if (z_verbose>1 && (c)) fprintf x ;}
#else
# define Assert(cond,msg)
# define Trace(x)
# define Tracev(x)
# define Tracevv(x)
# define Tracec(c,x)
# define Tracecv(c,x)
#endif
typedef uLong (ZEXPORT *check_func) OF((uLong check, const Bytef *buf,
uInt len));
voidpf zcalloc OF((voidpf opaque, unsigned items, unsigned size));
void zcfree OF((voidpf opaque, voidpf ptr));
#define ZALLOC(strm, items, size) \
(*((strm)->zalloc))((strm)->opaque, (items), (size))
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidpf)(addr))
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
#endif /* _Z_UTIL_H */

4
src/pcf/pcf.h
Unescape View File

@ -31,6 +31,7 @@ THE SOFTWARE.
#include <ft2build.h>
#include FT_INTERNAL_DRIVER_H
#include FT_INTERNAL_STREAM_H
FT_BEGIN_HEADER
@ -135,6 +136,9 @@ FT_BEGIN_HEADER
{
FT_FaceRec root;
FT_StreamRec gzip_stream;
FT_Stream gzip_source;
char* charset_encoding;
char* charset_registry;

31
src/pcf/pcfdriver.c
Unescape View File

@ -30,6 +30,8 @@ THE SOFTWARE.
#include FT_INTERNAL_DEBUG_H
#include FT_INTERNAL_STREAM_H
#include FT_INTERNAL_OBJECTS_H
#include FT_GZIP_H
#include FT_ERRORS_H
#include "pcf.h"
#include "pcfdriver.h"
@ -208,6 +210,13 @@ THE SOFTWARE.
FT_TRACE4(( "PCF_Face_Done: done face\n" ));
/* close gzip stream if any */
if ( face->root.stream == &face->gzip_stream )
{
FT_Stream_Close( &face->gzip_stream );
face->root.stream = face->gzip_source;
}
return PCF_Err_Ok;
}
@ -228,7 +237,27 @@ THE SOFTWARE.
error = pcf_load_font( stream, face );
if ( error )
goto Fail;
{
FT_Error error2;
/* this didn't work, try gzip support !! */
error2 = FT_Stream_OpenGzip( &face->gzip_stream, stream );
if ( error2 == FT_Err_Unimplemented_Feature )
goto Fail;
error = error2;
if ( error )
goto Fail;
face->gzip_source = stream;
face->root.stream = &face->gzip_stream;
stream = face->root.stream;
error = pcf_load_font( stream, face );
if ( error )
goto Fail;
}
/* set-up charmap */
{

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