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comparison: modules/zlib/src/gzguts.h
modules/zlib/src/gzguts.h
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:d84bdf2d9b2c |
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| 1 /* gzguts.h -- zlib internal header definitions for gz* operations | |
| 2 * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler | |
| 3 * For conditions of distribution and use, see copyright notice in zlib.h | |
| 4 */ | |
| 5 | |
| 6 #ifdef _LARGEFILE64_SOURCE | |
| 7 # ifndef _LARGEFILE_SOURCE | |
| 8 # define _LARGEFILE_SOURCE 1 | |
| 9 # endif | |
| 10 # ifdef _FILE_OFFSET_BITS | |
| 11 # undef _FILE_OFFSET_BITS | |
| 12 # endif | |
| 13 #endif | |
| 14 | |
| 15 #ifdef HAVE_HIDDEN | |
| 16 # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) | |
| 17 #else | |
| 18 # define ZLIB_INTERNAL | |
| 19 #endif | |
| 20 | |
| 21 #include <stdio.h> | |
| 22 #include "zlib.h" | |
| 23 #ifdef STDC | |
| 24 # include <string.h> | |
| 25 # include <stdlib.h> | |
| 26 # include <limits.h> | |
| 27 #endif | |
| 28 #include <fcntl.h> | |
| 29 | |
| 30 #ifdef _WIN32 | |
| 31 # include <stddef.h> | |
| 32 #endif | |
| 33 | |
| 34 #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) | |
| 35 # include <io.h> | |
| 36 #endif | |
| 37 | |
| 38 #ifdef WINAPI_FAMILY | |
| 39 # define open _open | |
| 40 # define read _read | |
| 41 # define write _write | |
| 42 # define close _close | |
| 43 #endif | |
| 44 | |
| 45 #ifdef NO_DEFLATE /* for compatibility with old definition */ | |
| 46 # define NO_GZCOMPRESS | |
| 47 #endif | |
| 48 | |
| 49 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) | |
| 50 # ifndef HAVE_VSNPRINTF | |
| 51 # define HAVE_VSNPRINTF | |
| 52 # endif | |
| 53 #endif | |
| 54 | |
| 55 #if defined(__CYGWIN__) | |
| 56 # ifndef HAVE_VSNPRINTF | |
| 57 # define HAVE_VSNPRINTF | |
| 58 # endif | |
| 59 #endif | |
| 60 | |
| 61 #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410) | |
| 62 # ifndef HAVE_VSNPRINTF | |
| 63 # define HAVE_VSNPRINTF | |
| 64 # endif | |
| 65 #endif | |
| 66 | |
| 67 #ifndef HAVE_VSNPRINTF | |
| 68 # ifdef MSDOS | |
| 69 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), | |
| 70 but for now we just assume it doesn't. */ | |
| 71 # define NO_vsnprintf | |
| 72 # endif | |
| 73 # ifdef __TURBOC__ | |
| 74 # define NO_vsnprintf | |
| 75 # endif | |
| 76 # ifdef WIN32 | |
| 77 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ | |
| 78 # if !defined(vsnprintf) && !defined(NO_vsnprintf) | |
| 79 # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) | |
| 80 # define vsnprintf _vsnprintf | |
| 81 # endif | |
| 82 # endif | |
| 83 # endif | |
| 84 # ifdef __SASC | |
| 85 # define NO_vsnprintf | |
| 86 # endif | |
| 87 # ifdef VMS | |
| 88 # define NO_vsnprintf | |
| 89 # endif | |
| 90 # ifdef __OS400__ | |
| 91 # define NO_vsnprintf | |
| 92 # endif | |
| 93 # ifdef __MVS__ | |
| 94 # define NO_vsnprintf | |
| 95 # endif | |
| 96 #endif | |
| 97 | |
| 98 /* unlike snprintf (which is required in C99, yet still not supported by | |
| 99 Microsoft more than a decade later!), _snprintf does not guarantee null | |
| 100 termination of the result -- however this is only used in gzlib.c where | |
| 101 the result is assured to fit in the space provided */ | |
| 102 #ifdef _MSC_VER | |
| 103 # define snprintf _snprintf | |
| 104 #endif | |
| 105 | |
| 106 #ifndef local | |
| 107 # define local static | |
| 108 #endif | |
| 109 /* compile with -Dlocal if your debugger can't find static symbols */ | |
| 110 | |
| 111 /* gz* functions always use library allocation functions */ | |
| 112 #ifndef STDC | |
| 113 extern voidp malloc OF((uInt size)); | |
| 114 extern void free OF((voidpf ptr)); | |
| 115 #endif | |
| 116 | |
| 117 /* get errno and strerror definition */ | |
| 118 #if defined UNDER_CE | |
| 119 # include <windows.h> | |
| 120 # define zstrerror() gz_strwinerror((DWORD)GetLastError()) | |
| 121 #else | |
| 122 # ifndef NO_STRERROR | |
| 123 # include <errno.h> | |
| 124 # define zstrerror() strerror(errno) | |
| 125 # else | |
| 126 # define zstrerror() "stdio error (consult errno)" | |
| 127 # endif | |
| 128 #endif | |
| 129 | |
| 130 /* provide prototypes for these when building zlib without LFS */ | |
| 131 #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 | |
| 132 ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); | |
| 133 ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); | |
| 134 ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); | |
| 135 ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); | |
| 136 #endif | |
| 137 | |
| 138 /* default memLevel */ | |
| 139 #if MAX_MEM_LEVEL >= 8 | |
| 140 # define DEF_MEM_LEVEL 8 | |
| 141 #else | |
| 142 # define DEF_MEM_LEVEL MAX_MEM_LEVEL | |
| 143 #endif | |
| 144 | |
| 145 /* default i/o buffer size -- double this for output when reading (this and | |
| 146 twice this must be able to fit in an unsigned type) */ | |
| 147 #define GZBUFSIZE 8192 | |
| 148 | |
| 149 /* gzip modes, also provide a little integrity check on the passed structure */ | |
| 150 #define GZ_NONE 0 | |
| 151 #define GZ_READ 7247 | |
| 152 #define GZ_WRITE 31153 | |
| 153 #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ | |
| 154 | |
| 155 /* values for gz_state how */ | |
| 156 #define LOOK 0 /* look for a gzip header */ | |
| 157 #define COPY 1 /* copy input directly */ | |
| 158 #define GZIP 2 /* decompress a gzip stream */ | |
| 159 | |
| 160 /* internal gzip file state data structure */ | |
| 161 typedef struct { | |
| 162 /* exposed contents for gzgetc() macro */ | |
| 163 struct gzFile_s x; /* "x" for exposed */ | |
| 164 /* x.have: number of bytes available at x.next */ | |
| 165 /* x.next: next output data to deliver or write */ | |
| 166 /* x.pos: current position in uncompressed data */ | |
| 167 /* used for both reading and writing */ | |
| 168 int mode; /* see gzip modes above */ | |
| 169 int fd; /* file descriptor */ | |
| 170 char *path; /* path or fd for error messages */ | |
| 171 unsigned size; /* buffer size, zero if not allocated yet */ | |
| 172 unsigned want; /* requested buffer size, default is GZBUFSIZE */ | |
| 173 unsigned char *in; /* input buffer */ | |
| 174 unsigned char *out; /* output buffer (double-sized when reading) */ | |
| 175 int direct; /* 0 if processing gzip, 1 if transparent */ | |
| 176 /* just for reading */ | |
| 177 int how; /* 0: get header, 1: copy, 2: decompress */ | |
| 178 z_off64_t start; /* where the gzip data started, for rewinding */ | |
| 179 int eof; /* true if end of input file reached */ | |
| 180 int past; /* true if read requested past end */ | |
| 181 /* just for writing */ | |
| 182 int level; /* compression level */ | |
| 183 int strategy; /* compression strategy */ | |
| 184 /* seek request */ | |
| 185 z_off64_t skip; /* amount to skip (already rewound if backwards) */ | |
| 186 int seek; /* true if seek request pending */ | |
| 187 /* error information */ | |
| 188 int err; /* error code */ | |
| 189 char *msg; /* error message */ | |
| 190 /* zlib inflate or deflate stream */ | |
| 191 z_stream strm; /* stream structure in-place (not a pointer) */ | |
| 192 } gz_state; | |
| 193 typedef gz_state FAR *gz_statep; | |
| 194 | |
| 195 /* shared functions */ | |
| 196 void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *)); | |
| 197 #if defined UNDER_CE | |
| 198 char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error)); | |
| 199 #endif | |
| 200 | |
| 201 /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t | |
| 202 value -- needed when comparing unsigned to z_off64_t, which is signed | |
| 203 (possible z_off64_t types off_t, off64_t, and long are all signed) */ | |
| 204 #ifdef INT_MAX | |
| 205 # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) | |
| 206 #else | |
| 207 unsigned ZLIB_INTERNAL gz_intmax OF((void)); | |
| 208 # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) | |
| 209 #endif |
