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