1 /* 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. Oracle designates this 7 * particular file as subject to the "Classpath" exception as provided 8 * by Oracle in the LICENSE file that accompanied this code. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 */ 24 25 /* gzguts.h -- zlib internal header definitions for gz* operations 26 * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler 27 * For conditions of distribution and use, see copyright notice in zlib.h 28 */ 29 30 #ifdef _LARGEFILE64_SOURCE 31 # ifndef _LARGEFILE_SOURCE 32 # define _LARGEFILE_SOURCE 1 33 # endif 34 # ifdef _FILE_OFFSET_BITS 35 # undef _FILE_OFFSET_BITS 36 # endif 37 #endif 38 39 #ifdef HAVE_HIDDEN 40 # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) 41 #else 42 # define ZLIB_INTERNAL 43 #endif 44 45 #include <stdio.h> 46 #include "zlib.h" 47 #ifdef STDC 48 # include <string.h> 49 # include <stdlib.h> 50 # include <limits.h> 51 #endif 52 53 #ifndef _POSIX_SOURCE 54 # define _POSIX_SOURCE 55 #endif 56 #include <fcntl.h> 57 58 #ifdef _WIN32 59 # include <stddef.h> 60 #endif 61 62 #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) 63 # include <io.h> 64 #endif 65 66 #if defined(_WIN32) || defined(__CYGWIN__) 67 # define WIDECHAR 68 #endif 69 70 #ifdef WINAPI_FAMILY 71 # define open _open 72 # define read _read 73 # define write _write 74 # define close _close 75 #endif 76 77 #ifdef NO_DEFLATE /* for compatibility with old definition */ 78 # define NO_GZCOMPRESS 79 #endif 80 81 #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) 82 # ifndef HAVE_VSNPRINTF 83 # define HAVE_VSNPRINTF 84 # endif 85 #endif 86 87 #if defined(__CYGWIN__) 88 # ifndef HAVE_VSNPRINTF 89 # define HAVE_VSNPRINTF 90 # endif 91 #endif 92 93 #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410) 94 # ifndef HAVE_VSNPRINTF 95 # define HAVE_VSNPRINTF 96 # endif 97 #endif 98 99 #ifndef HAVE_VSNPRINTF 100 # ifdef MSDOS 101 /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), 102 but for now we just assume it doesn't. */ 103 # define NO_vsnprintf 104 # endif 105 # ifdef __TURBOC__ 106 # define NO_vsnprintf 107 # endif 108 # ifdef WIN32 109 /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ 110 # if !defined(vsnprintf) && !defined(NO_vsnprintf) 111 # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) 112 # define vsnprintf _vsnprintf 113 # endif 114 # endif 115 # endif 116 # ifdef __SASC 117 # define NO_vsnprintf 118 # endif 119 # ifdef VMS 120 # define NO_vsnprintf 121 # endif 122 # ifdef __OS400__ 123 # define NO_vsnprintf 124 # endif 125 # ifdef __MVS__ 126 # define NO_vsnprintf 127 # endif 128 #endif 129 130 /* unlike snprintf (which is required in C99), _snprintf does not guarantee 131 null termination of the result -- however this is only used in gzlib.c where 132 the result is assured to fit in the space provided */ 133 #if defined(_MSC_VER) && _MSC_VER < 1900 134 # define snprintf _snprintf 135 #endif 136 137 #ifndef local 138 # define local static 139 #endif 140 /* since "static" is used to mean two completely different things in C, we 141 define "local" for the non-static meaning of "static", for readability 142 (compile with -Dlocal if your debugger can't find static symbols) */ 143 144 /* gz* functions always use library allocation functions */ 145 #ifndef STDC 146 extern voidp malloc OF((uInt size)); 147 extern void free OF((voidpf ptr)); 148 #endif 149 150 /* get errno and strerror definition */ 151 #if defined UNDER_CE 152 # include <windows.h> 153 # define zstrerror() gz_strwinerror((DWORD)GetLastError()) 154 #else 155 # ifndef NO_STRERROR 156 # include <errno.h> 157 # define zstrerror() strerror(errno) 158 # else 159 # define zstrerror() "stdio error (consult errno)" 160 # endif 161 #endif 162 163 /* provide prototypes for these when building zlib without LFS */ 164 #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 165 ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); 166 ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); 167 ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); 168 ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); 169 #endif 170 171 /* default memLevel */ 172 #if MAX_MEM_LEVEL >= 8 173 # define DEF_MEM_LEVEL 8 174 #else 175 # define DEF_MEM_LEVEL MAX_MEM_LEVEL 176 #endif 177 178 /* default i/o buffer size -- double this for output when reading (this and 179 twice this must be able to fit in an unsigned type) */ 180 #define GZBUFSIZE 8192 181 182 /* gzip modes, also provide a little integrity check on the passed structure */ 183 #define GZ_NONE 0 184 #define GZ_READ 7247 185 #define GZ_WRITE 31153 186 #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ 187 188 /* values for gz_state how */ 189 #define LOOK 0 /* look for a gzip header */ 190 #define COPY 1 /* copy input directly */ 191 #define GZIP 2 /* decompress a gzip stream */ 192 193 /* internal gzip file state data structure */ 194 typedef struct { 195 /* exposed contents for gzgetc() macro */ 196 struct gzFile_s x; /* "x" for exposed */ 197 /* x.have: number of bytes available at x.next */ 198 /* x.next: next output data to deliver or write */ 199 /* x.pos: current position in uncompressed data */ 200 /* used for both reading and writing */ 201 int mode; /* see gzip modes above */ 202 int fd; /* file descriptor */ 203 char *path; /* path or fd for error messages */ 204 unsigned size; /* buffer size, zero if not allocated yet */ 205 unsigned want; /* requested buffer size, default is GZBUFSIZE */ 206 unsigned char *in; /* input buffer (double-sized when writing) */ 207 unsigned char *out; /* output buffer (double-sized when reading) */ 208 int direct; /* 0 if processing gzip, 1 if transparent */ 209 /* just for reading */ 210 int how; /* 0: get header, 1: copy, 2: decompress */ 211 z_off64_t start; /* where the gzip data started, for rewinding */ 212 int eof; /* true if end of input file reached */ 213 int past; /* true if read requested past end */ 214 /* just for writing */ 215 int level; /* compression level */ 216 int strategy; /* compression strategy */ 217 /* seek request */ 218 z_off64_t skip; /* amount to skip (already rewound if backwards) */ 219 int seek; /* true if seek request pending */ 220 /* error information */ 221 int err; /* error code */ 222 char *msg; /* error message */ 223 /* zlib inflate or deflate stream */ 224 z_stream strm; /* stream structure in-place (not a pointer) */ 225 } gz_state; 226 typedef gz_state FAR *gz_statep; 227 228 /* shared functions */ 229 void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *)); 230 #if defined UNDER_CE 231 char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error)); 232 #endif 233 234 /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t 235 value -- needed when comparing unsigned to z_off64_t, which is signed 236 (possible z_off64_t types off_t, off64_t, and long are all signed) */ 237 #ifdef INT_MAX 238 # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) 239 #else 240 unsigned ZLIB_INTERNAL gz_intmax OF((void)); 241 # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) 242 #endif 243