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