1b8382935SToomas Soome /* gzguts.h -- zlib internal header definitions for gz* operations 2*148fd93eSToomas Soome * Copyright (C) 2004-2019 Mark Adler 3b8382935SToomas Soome * For conditions of distribution and use, see copyright notice in zlib.h 4b8382935SToomas Soome */ 5b8382935SToomas Soome 6b8382935SToomas Soome #ifdef _LARGEFILE64_SOURCE 7b8382935SToomas Soome # ifndef _LARGEFILE_SOURCE 8b8382935SToomas Soome # define _LARGEFILE_SOURCE 1 9b8382935SToomas Soome # endif 10b8382935SToomas Soome # ifdef _FILE_OFFSET_BITS 11b8382935SToomas Soome # undef _FILE_OFFSET_BITS 12b8382935SToomas Soome # endif 13b8382935SToomas Soome #endif 14b8382935SToomas Soome 15b8382935SToomas Soome #ifdef HAVE_HIDDEN 16b8382935SToomas Soome # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 17b8382935SToomas Soome #else 18b8382935SToomas Soome # define ZLIB_INTERNAL 19b8382935SToomas Soome #endif 20b8382935SToomas Soome 21b8382935SToomas Soome #include <stdio.h> 22b8382935SToomas Soome #include "zlib.h" 23b8382935SToomas Soome #ifdef STDC 24b8382935SToomas Soome # include <string.h> 25b8382935SToomas Soome # include <stdlib.h> 26b8382935SToomas Soome # include <limits.h> 27b8382935SToomas Soome #endif 28b8382935SToomas Soome 29b8382935SToomas Soome #ifndef _POSIX_SOURCE 30b8382935SToomas Soome # define _POSIX_SOURCE 31b8382935SToomas Soome #endif 32b8382935SToomas Soome #include <fcntl.h> 33b8382935SToomas Soome 34b8382935SToomas Soome #ifdef _WIN32 35b8382935SToomas Soome # include <stddef.h> 36b8382935SToomas Soome #endif 37b8382935SToomas Soome 38b8382935SToomas Soome #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) 39b8382935SToomas Soome # include <io.h> 40b8382935SToomas Soome #endif 41b8382935SToomas Soome 42*148fd93eSToomas Soome #if defined(_WIN32) 43b8382935SToomas Soome # define WIDECHAR 44b8382935SToomas Soome #endif 45b8382935SToomas Soome 46b8382935SToomas Soome #ifdef WINAPI_FAMILY 47b8382935SToomas Soome # define open _open 48b8382935SToomas Soome # define read _read 49b8382935SToomas Soome # define write _write 50b8382935SToomas Soome # define close _close 51b8382935SToomas Soome #endif 52b8382935SToomas Soome 53b8382935SToomas Soome #ifdef NO_DEFLATE /* for compatibility with old definition */ 54b8382935SToomas Soome # define NO_GZCOMPRESS 55b8382935SToomas Soome #endif 56b8382935SToomas Soome 57b8382935SToomas Soome #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) 58b8382935SToomas Soome # ifndef HAVE_VSNPRINTF 59b8382935SToomas Soome # define HAVE_VSNPRINTF 60b8382935SToomas Soome # endif 61b8382935SToomas Soome #endif 62b8382935SToomas Soome 63b8382935SToomas Soome #if defined(__CYGWIN__) 64b8382935SToomas Soome # ifndef HAVE_VSNPRINTF 65b8382935SToomas Soome # define HAVE_VSNPRINTF 66b8382935SToomas Soome # endif 67b8382935SToomas Soome #endif 68b8382935SToomas Soome 69b8382935SToomas Soome #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410) 70b8382935SToomas Soome # ifndef HAVE_VSNPRINTF 71b8382935SToomas Soome # define HAVE_VSNPRINTF 72b8382935SToomas Soome # endif 73b8382935SToomas Soome #endif 74b8382935SToomas Soome 75b8382935SToomas Soome #ifndef HAVE_VSNPRINTF 76b8382935SToomas Soome # ifdef MSDOS 77b8382935SToomas Soome /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), 78b8382935SToomas Soome but for now we just assume it doesn't. */ 79b8382935SToomas Soome # define NO_vsnprintf 80b8382935SToomas Soome # endif 81b8382935SToomas Soome # ifdef __TURBOC__ 82b8382935SToomas Soome # define NO_vsnprintf 83b8382935SToomas Soome # endif 84b8382935SToomas Soome # ifdef WIN32 85b8382935SToomas Soome /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ 86b8382935SToomas Soome # if !defined(vsnprintf) && !defined(NO_vsnprintf) 87b8382935SToomas Soome # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) 88b8382935SToomas Soome # define vsnprintf _vsnprintf 89b8382935SToomas Soome # endif 90b8382935SToomas Soome # endif 91b8382935SToomas Soome # endif 92b8382935SToomas Soome # ifdef __SASC 93b8382935SToomas Soome # define NO_vsnprintf 94b8382935SToomas Soome # endif 95b8382935SToomas Soome # ifdef VMS 96b8382935SToomas Soome # define NO_vsnprintf 97b8382935SToomas Soome # endif 98b8382935SToomas Soome # ifdef __OS400__ 99b8382935SToomas Soome # define NO_vsnprintf 100b8382935SToomas Soome # endif 101b8382935SToomas Soome # ifdef __MVS__ 102b8382935SToomas Soome # define NO_vsnprintf 103b8382935SToomas Soome # endif 104b8382935SToomas Soome #endif 105b8382935SToomas Soome 106b8382935SToomas Soome /* unlike snprintf (which is required in C99), _snprintf does not guarantee 107b8382935SToomas Soome null termination of the result -- however this is only used in gzlib.c where 108b8382935SToomas Soome the result is assured to fit in the space provided */ 109b8382935SToomas Soome #if defined(_MSC_VER) && _MSC_VER < 1900 110b8382935SToomas Soome # define snprintf _snprintf 111b8382935SToomas Soome #endif 112b8382935SToomas Soome 113b8382935SToomas Soome #ifndef local 114b8382935SToomas Soome # define local static 115b8382935SToomas Soome #endif 116b8382935SToomas Soome /* since "static" is used to mean two completely different things in C, we 117b8382935SToomas Soome define "local" for the non-static meaning of "static", for readability 118b8382935SToomas Soome (compile with -Dlocal if your debugger can't find static symbols) */ 119b8382935SToomas Soome 120b8382935SToomas Soome /* gz* functions always use library allocation functions */ 121b8382935SToomas Soome #ifndef STDC 122b8382935SToomas Soome extern voidp malloc OF((uInt size)); 123b8382935SToomas Soome extern void free OF((voidpf ptr)); 124b8382935SToomas Soome #endif 125b8382935SToomas Soome 126b8382935SToomas Soome /* get errno and strerror definition */ 127b8382935SToomas Soome #if defined UNDER_CE 128b8382935SToomas Soome # include <windows.h> 129b8382935SToomas Soome # define zstrerror() gz_strwinerror((DWORD)GetLastError()) 130b8382935SToomas Soome #else 131b8382935SToomas Soome # ifndef NO_STRERROR 132b8382935SToomas Soome # include <errno.h> 133b8382935SToomas Soome # define zstrerror() strerror(errno) 134b8382935SToomas Soome # else 135b8382935SToomas Soome # define zstrerror() "stdio error (consult errno)" 136b8382935SToomas Soome # endif 137b8382935SToomas Soome #endif 138b8382935SToomas Soome 139b8382935SToomas Soome /* provide prototypes for these when building zlib without LFS */ 140b8382935SToomas Soome #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 141b8382935SToomas Soome ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); 142b8382935SToomas Soome ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); 143b8382935SToomas Soome ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); 144b8382935SToomas Soome ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); 145b8382935SToomas Soome #endif 146b8382935SToomas Soome 147b8382935SToomas Soome /* default memLevel */ 148b8382935SToomas Soome #if MAX_MEM_LEVEL >= 8 149b8382935SToomas Soome # define DEF_MEM_LEVEL 8 150b8382935SToomas Soome #else 151b8382935SToomas Soome # define DEF_MEM_LEVEL MAX_MEM_LEVEL 152b8382935SToomas Soome #endif 153b8382935SToomas Soome 154b8382935SToomas Soome /* default i/o buffer size -- double this for output when reading (this and 155b8382935SToomas Soome twice this must be able to fit in an unsigned type) */ 156b8382935SToomas Soome #define GZBUFSIZE 8192 157b8382935SToomas Soome 158b8382935SToomas Soome /* gzip modes, also provide a little integrity check on the passed structure */ 159b8382935SToomas Soome #define GZ_NONE 0 160b8382935SToomas Soome #define GZ_READ 7247 161b8382935SToomas Soome #define GZ_WRITE 31153 162b8382935SToomas Soome #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ 163b8382935SToomas Soome 164b8382935SToomas Soome /* values for gz_state how */ 165b8382935SToomas Soome #define LOOK 0 /* look for a gzip header */ 166b8382935SToomas Soome #define COPY 1 /* copy input directly */ 167b8382935SToomas Soome #define GZIP 2 /* decompress a gzip stream */ 168b8382935SToomas Soome 169b8382935SToomas Soome /* internal gzip file state data structure */ 170b8382935SToomas Soome typedef struct { 171b8382935SToomas Soome /* exposed contents for gzgetc() macro */ 172b8382935SToomas Soome struct gzFile_s x; /* "x" for exposed */ 173b8382935SToomas Soome /* x.have: number of bytes available at x.next */ 174b8382935SToomas Soome /* x.next: next output data to deliver or write */ 175b8382935SToomas Soome /* x.pos: current position in uncompressed data */ 176b8382935SToomas Soome /* used for both reading and writing */ 177b8382935SToomas Soome int mode; /* see gzip modes above */ 178b8382935SToomas Soome int fd; /* file descriptor */ 179b8382935SToomas Soome char *path; /* path or fd for error messages */ 180b8382935SToomas Soome unsigned size; /* buffer size, zero if not allocated yet */ 181b8382935SToomas Soome unsigned want; /* requested buffer size, default is GZBUFSIZE */ 182b8382935SToomas Soome unsigned char *in; /* input buffer (double-sized when writing) */ 183b8382935SToomas Soome unsigned char *out; /* output buffer (double-sized when reading) */ 184b8382935SToomas Soome int direct; /* 0 if processing gzip, 1 if transparent */ 185b8382935SToomas Soome /* just for reading */ 186b8382935SToomas Soome int how; /* 0: get header, 1: copy, 2: decompress */ 187b8382935SToomas Soome z_off64_t start; /* where the gzip data started, for rewinding */ 188b8382935SToomas Soome int eof; /* true if end of input file reached */ 189b8382935SToomas Soome int past; /* true if read requested past end */ 190b8382935SToomas Soome /* just for writing */ 191b8382935SToomas Soome int level; /* compression level */ 192b8382935SToomas Soome int strategy; /* compression strategy */ 193*148fd93eSToomas Soome int reset; /* true if a reset is pending after a Z_FINISH */ 194b8382935SToomas Soome /* seek request */ 195b8382935SToomas Soome z_off64_t skip; /* amount to skip (already rewound if backwards) */ 196b8382935SToomas Soome int seek; /* true if seek request pending */ 197b8382935SToomas Soome /* error information */ 198b8382935SToomas Soome int err; /* error code */ 199b8382935SToomas Soome char *msg; /* error message */ 200b8382935SToomas Soome /* zlib inflate or deflate stream */ 201b8382935SToomas Soome z_stream strm; /* stream structure in-place (not a pointer) */ 202b8382935SToomas Soome } gz_state; 203b8382935SToomas Soome typedef gz_state FAR *gz_statep; 204b8382935SToomas Soome 205b8382935SToomas Soome /* shared functions */ 206b8382935SToomas Soome void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *)); 207b8382935SToomas Soome #if defined UNDER_CE 208b8382935SToomas Soome char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error)); 209b8382935SToomas Soome #endif 210b8382935SToomas Soome 211b8382935SToomas Soome /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t 212b8382935SToomas Soome value -- needed when comparing unsigned to z_off64_t, which is signed 213b8382935SToomas Soome (possible z_off64_t types off_t, off64_t, and long are all signed) */ 214b8382935SToomas Soome #ifdef INT_MAX 215b8382935SToomas Soome # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) 216b8382935SToomas Soome #else 217b8382935SToomas Soome unsigned ZLIB_INTERNAL gz_intmax OF((void)); 218b8382935SToomas Soome # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) 219b8382935SToomas Soome #endif 220