1 /* gzguts.h -- zlib internal header definitions for gz* operations 2 * Copyright (C) 2004-2026 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 # undef _FILE_OFFSET_BITS 11 # undef _TIME_BITS 12 #endif 13 14 #ifdef HAVE_HIDDEN 15 # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 16 #else 17 # define ZLIB_INTERNAL 18 #endif 19 20 #if defined(_WIN32) 21 # ifndef WIN32_LEAN_AND_MEAN 22 # define WIN32_LEAN_AND_MEAN 23 # endif 24 # ifndef _CRT_SECURE_NO_WARNINGS 25 # define _CRT_SECURE_NO_WARNINGS 26 # endif 27 # ifndef _CRT_NONSTDC_NO_DEPRECATE 28 # define _CRT_NONSTDC_NO_DEPRECATE 29 # endif 30 #endif 31 32 #include <stdio.h> 33 #include "zlib.h" 34 #ifdef STDC 35 # include <unistd.h> 36 # include <string.h> 37 # include <stdlib.h> 38 # include <limits.h> 39 #endif 40 41 #ifndef _POSIX_C_SOURCE 42 # define _POSIX_C_SOURCE 200112L 43 #endif 44 #include <fcntl.h> 45 46 #ifdef _WIN32 47 # include <stddef.h> 48 #endif 49 50 #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) 51 # include <io.h> 52 # include <sys/stat.h> 53 #endif 54 55 #if defined(_WIN32) && !defined(WIDECHAR) 56 # define WIDECHAR 57 #endif 58 59 #ifdef NO_DEFLATE /* for compatibility with old definition */ 60 # define NO_GZCOMPRESS 61 #endif 62 63 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) 64 # ifndef HAVE_VSNPRINTF 65 # define HAVE_VSNPRINTF 66 # endif 67 #endif 68 69 #if defined(__CYGWIN__) 70 # ifndef HAVE_VSNPRINTF 71 # define HAVE_VSNPRINTF 72 # endif 73 #endif 74 75 #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410) 76 # ifndef HAVE_VSNPRINTF 77 # define HAVE_VSNPRINTF 78 # endif 79 #endif 80 81 #ifndef HAVE_VSNPRINTF 82 # if !defined(NO_vsnprintf) && \ 83 (defined(MSDOS) || defined(__TURBOC__) || defined(__SASC) || \ 84 defined(VMS) || defined(__OS400) || defined(__MVS__)) 85 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), 86 but for now we just assume it doesn't. */ 87 # define NO_vsnprintf 88 # endif 89 # ifdef WIN32 90 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ 91 # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) 92 # ifndef vsnprintf 93 # define vsnprintf _vsnprintf 94 # endif 95 # endif 96 # elif !defined(__STDC_VERSION__) || __STDC_VERSION__-0 < 199901L 97 /* Otherwise if C89/90, assume no C99 snprintf() or vsnprintf() */ 98 # ifndef NO_snprintf 99 # define NO_snprintf 100 # endif 101 # ifndef NO_vsnprintf 102 # define NO_vsnprintf 103 # endif 104 # endif 105 #endif 106 107 /* unlike snprintf (which is required in C99), _snprintf does not guarantee 108 null termination of the result -- however this is only used in gzlib.c where 109 the result is assured to fit in the space provided */ 110 #if defined(_MSC_VER) && _MSC_VER < 1900 111 # define snprintf _snprintf 112 #endif 113 114 #ifndef local 115 # define local static 116 #endif 117 /* since "static" is used to mean two completely different things in C, we 118 define "local" for the non-static meaning of "static", for readability 119 (compile with -Dlocal if your debugger can't find static symbols) */ 120 121 /* gz* functions always use library allocation functions */ 122 #ifndef STDC 123 extern voidp malloc(uInt size); 124 extern void free(voidpf ptr); 125 #endif 126 127 /* get errno and strerror definition */ 128 #if defined UNDER_CE 129 # include <windows.h> 130 # define zstrerror() gz_strwinerror((DWORD)GetLastError()) 131 #else 132 # ifndef NO_STRERROR 133 # include <errno.h> 134 # define zstrerror() strerror(errno) 135 # else 136 # define zstrerror() "stdio error (consult errno)" 137 # endif 138 #endif 139 140 /* provide prototypes for these when building zlib without LFS */ 141 #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 142 ZEXTERN gzFile ZEXPORT gzopen64(const char *, const char *); 143 ZEXTERN z_off64_t ZEXPORT gzseek64(gzFile, z_off64_t, int); 144 ZEXTERN z_off64_t ZEXPORT gztell64(gzFile); 145 ZEXTERN z_off64_t ZEXPORT gzoffset64(gzFile); 146 #endif 147 148 /* default memLevel */ 149 #if MAX_MEM_LEVEL >= 8 150 # define DEF_MEM_LEVEL 8 151 #else 152 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 153 #endif 154 155 /* default i/o buffer size -- double this for output when reading (this and 156 twice this must be able to fit in an unsigned type) */ 157 #define GZBUFSIZE 8192 158 159 /* gzip modes, also provide a little integrity check on the passed structure */ 160 #define GZ_NONE 0 161 #define GZ_READ 7247 162 #define GZ_WRITE 31153 163 #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ 164 165 /* values for gz_state how */ 166 #define LOOK 0 /* look for a gzip header */ 167 #define COPY 1 /* copy input directly */ 168 #define GZIP 2 /* decompress a gzip stream */ 169 170 /* internal gzip file state data structure */ 171 typedef struct { 172 /* exposed contents for gzgetc() macro */ 173 struct gzFile_s x; /* "x" for exposed */ 174 /* x.have: number of bytes available at x.next */ 175 /* x.next: next output data to deliver or write */ 176 /* x.pos: current position in uncompressed data */ 177 /* used for both reading and writing */ 178 int mode; /* see gzip modes above */ 179 int fd; /* file descriptor */ 180 char *path; /* path or fd for error messages */ 181 unsigned size; /* buffer size, zero if not allocated yet */ 182 unsigned want; /* requested buffer size, default is GZBUFSIZE */ 183 unsigned char *in; /* input buffer (double-sized when writing) */ 184 unsigned char *out; /* output buffer (double-sized when reading) */ 185 int direct; /* 0 if processing gzip, 1 if transparent */ 186 /* just for reading */ 187 int junk; /* -1 = start, 1 = junk candidate, 0 = in gzip */ 188 int how; /* 0: get header, 1: copy, 2: decompress */ 189 int again; /* true if EAGAIN or EWOULDBLOCK on last i/o */ 190 z_off64_t start; /* where the gzip data started, for rewinding */ 191 int eof; /* true if end of input file reached */ 192 int past; /* true if read requested past end */ 193 /* just for writing */ 194 int level; /* compression level */ 195 int strategy; /* compression strategy */ 196 int reset; /* true if a reset is pending after a Z_FINISH */ 197 /* seek request */ 198 z_off64_t skip; /* amount to skip (already rewound if backwards) */ 199 /* error information */ 200 int err; /* error code */ 201 char *msg; /* error message */ 202 /* zlib inflate or deflate stream */ 203 z_stream strm; /* stream structure in-place (not a pointer) */ 204 } gz_state; 205 typedef gz_state FAR *gz_statep; 206 207 /* shared functions */ 208 void ZLIB_INTERNAL gz_error(gz_statep, int, const char *); 209 #if defined UNDER_CE 210 char ZLIB_INTERNAL *gz_strwinerror(DWORD error); 211 #endif 212 213 /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t 214 value -- needed when comparing unsigned to z_off64_t, which is signed 215 (possible z_off64_t types off_t, off64_t, and long are all signed) */ 216 unsigned ZLIB_INTERNAL gz_intmax(void); 217 #define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) 218
Indexes created Fri Jun 19 00:25:02 UTC 2026