]>
Commit | Line | Data |
---|---|---|
43743d63 | 1 | /* gzguts.h -- zlib internal header definitions for gz* operations |
b7aa844d | 2 | * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler |
43743d63 MK |
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 | # ifdef _FILE_OFFSET_BITS | |
11 | # undef _FILE_OFFSET_BITS | |
12 | # endif | |
13 | #endif | |
14 | ||
9acb8ddf | 15 | #ifdef HAVE_HIDDEN |
43743d63 MK |
16 | # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) |
17 | #else | |
18 | # define ZLIB_INTERNAL | |
19 | #endif | |
20 | ||
21 | #include <stdio.h> | |
22 | #include "zlib.h" | |
23 | #ifdef STDC | |
24 | # include <string.h> | |
25 | # include <stdlib.h> | |
26 | # include <limits.h> | |
27 | #endif | |
b7aa844d MK |
28 | |
29 | #ifndef _POSIX_SOURCE | |
30 | # define _POSIX_SOURCE | |
31 | #endif | |
43743d63 MK |
32 | #include <fcntl.h> |
33 | ||
9acb8ddf MK |
34 | #ifdef _WIN32 |
35 | # include <stddef.h> | |
36 | #endif | |
37 | ||
38 | #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) | |
39 | # include <io.h> | |
40 | #endif | |
41 | ||
142b99a8 | 42 | #if defined(_WIN32) |
b7aa844d MK |
43 | # define WIDECHAR |
44 | #endif | |
45 | ||
cd9ec142 MK |
46 | #ifdef WINAPI_FAMILY |
47 | # define open _open | |
48 | # define read _read | |
49 | # define write _write | |
50 | # define close _close | |
51 | #endif | |
52 | ||
43743d63 MK |
53 | #ifdef NO_DEFLATE /* for compatibility with old definition */ |
54 | # define NO_GZCOMPRESS | |
55 | #endif | |
56 | ||
9acb8ddf MK |
57 | #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) |
58 | # ifndef HAVE_VSNPRINTF | |
59 | # define HAVE_VSNPRINTF | |
60 | # endif | |
61 | #endif | |
62 | ||
63 | #if defined(__CYGWIN__) | |
64 | # ifndef HAVE_VSNPRINTF | |
65 | # define HAVE_VSNPRINTF | |
66 | # endif | |
67 | #endif | |
68 | ||
69 | #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410) | |
70 | # ifndef HAVE_VSNPRINTF | |
71 | # define HAVE_VSNPRINTF | |
72 | # endif | |
73 | #endif | |
74 | ||
75 | #ifndef HAVE_VSNPRINTF | |
76 | # ifdef MSDOS | |
77 | /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), | |
cd9ec142 | 78 | but for now we just assume it doesn't. */ |
9acb8ddf MK |
79 | # define NO_vsnprintf |
80 | # endif | |
81 | # ifdef __TURBOC__ | |
82 | # define NO_vsnprintf | |
83 | # endif | |
84 | # ifdef WIN32 | |
85 | /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ | |
86 | # if !defined(vsnprintf) && !defined(NO_vsnprintf) | |
87 | # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) | |
88 | # define vsnprintf _vsnprintf | |
89 | # endif | |
90 | # endif | |
91 | # endif | |
92 | # ifdef __SASC | |
93 | # define NO_vsnprintf | |
94 | # endif | |
95 | # ifdef VMS | |
96 | # define NO_vsnprintf | |
97 | # endif | |
98 | # ifdef __OS400__ | |
99 | # define NO_vsnprintf | |
100 | # endif | |
101 | # ifdef __MVS__ | |
102 | # define NO_vsnprintf | |
103 | # endif | |
43743d63 MK |
104 | #endif |
105 | ||
b7aa844d MK |
106 | /* unlike snprintf (which is required in C99), _snprintf does not guarantee |
107 | null termination of the result -- however this is only used in gzlib.c where | |
cd9ec142 | 108 | the result is assured to fit in the space provided */ |
b7aa844d | 109 | #if defined(_MSC_VER) && _MSC_VER < 1900 |
cd9ec142 MK |
110 | # define snprintf _snprintf |
111 | #endif | |
112 | ||
43743d63 MK |
113 | #ifndef local |
114 | # define local static | |
115 | #endif | |
b7aa844d MK |
116 | /* since "static" is used to mean two completely different things in C, we |
117 | define "local" for the non-static meaning of "static", for readability | |
118 | (compile with -Dlocal if your debugger can't find static symbols) */ | |
43743d63 MK |
119 | |
120 | /* gz* functions always use library allocation functions */ | |
121 | #ifndef STDC | |
122 | extern voidp malloc OF((uInt size)); | |
123 | extern void free OF((voidpf ptr)); | |
124 | #endif | |
125 | ||
126 | /* get errno and strerror definition */ | |
127 | #if defined UNDER_CE | |
128 | # include <windows.h> | |
129 | # define zstrerror() gz_strwinerror((DWORD)GetLastError()) | |
130 | #else | |
9acb8ddf | 131 | # ifndef NO_STRERROR |
43743d63 MK |
132 | # include <errno.h> |
133 | # define zstrerror() strerror(errno) | |
134 | # else | |
135 | # define zstrerror() "stdio error (consult errno)" | |
136 | # endif | |
137 | #endif | |
138 | ||
139 | /* provide prototypes for these when building zlib without LFS */ | |
140 | #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 | |
141 | ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); | |
142 | ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); | |
143 | ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); | |
144 | ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); | |
145 | #endif | |
146 | ||
9acb8ddf MK |
147 | /* default memLevel */ |
148 | #if MAX_MEM_LEVEL >= 8 | |
149 | # define DEF_MEM_LEVEL 8 | |
150 | #else | |
151 | # define DEF_MEM_LEVEL MAX_MEM_LEVEL | |
152 | #endif | |
153 | ||
cd9ec142 MK |
154 | /* default i/o buffer size -- double this for output when reading (this and |
155 | twice this must be able to fit in an unsigned type) */ | |
43743d63 MK |
156 | #define GZBUFSIZE 8192 |
157 | ||
158 | /* gzip modes, also provide a little integrity check on the passed structure */ | |
159 | #define GZ_NONE 0 | |
160 | #define GZ_READ 7247 | |
161 | #define GZ_WRITE 31153 | |
162 | #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ | |
163 | ||
164 | /* values for gz_state how */ | |
165 | #define LOOK 0 /* look for a gzip header */ | |
166 | #define COPY 1 /* copy input directly */ | |
167 | #define GZIP 2 /* decompress a gzip stream */ | |
168 | ||
169 | /* internal gzip file state data structure */ | |
170 | typedef struct { | |
9acb8ddf MK |
171 | /* exposed contents for gzgetc() macro */ |
172 | struct gzFile_s x; /* "x" for exposed */ | |
173 | /* x.have: number of bytes available at x.next */ | |
174 | /* x.next: next output data to deliver or write */ | |
175 | /* x.pos: current position in uncompressed data */ | |
43743d63 MK |
176 | /* used for both reading and writing */ |
177 | int mode; /* see gzip modes above */ | |
178 | int fd; /* file descriptor */ | |
179 | char *path; /* path or fd for error messages */ | |
43743d63 MK |
180 | unsigned size; /* buffer size, zero if not allocated yet */ |
181 | unsigned want; /* requested buffer size, default is GZBUFSIZE */ | |
b7aa844d | 182 | unsigned char *in; /* input buffer (double-sized when writing) */ |
43743d63 | 183 | unsigned char *out; /* output buffer (double-sized when reading) */ |
9acb8ddf | 184 | int direct; /* 0 if processing gzip, 1 if transparent */ |
43743d63 | 185 | /* just for reading */ |
43743d63 | 186 | int how; /* 0: get header, 1: copy, 2: decompress */ |
9acb8ddf MK |
187 | z_off64_t start; /* where the gzip data started, for rewinding */ |
188 | int eof; /* true if end of input file reached */ | |
189 | int past; /* true if read requested past end */ | |
43743d63 MK |
190 | /* just for writing */ |
191 | int level; /* compression level */ | |
192 | int strategy; /* compression strategy */ | |
193 | /* seek request */ | |
194 | z_off64_t skip; /* amount to skip (already rewound if backwards) */ | |
195 | int seek; /* true if seek request pending */ | |
196 | /* error information */ | |
197 | int err; /* error code */ | |
198 | char *msg; /* error message */ | |
199 | /* zlib inflate or deflate stream */ | |
200 | z_stream strm; /* stream structure in-place (not a pointer) */ | |
201 | } gz_state; | |
202 | typedef gz_state FAR *gz_statep; | |
203 | ||
204 | /* shared functions */ | |
205 | void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *)); | |
206 | #if defined UNDER_CE | |
207 | char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error)); | |
208 | #endif | |
209 | ||
210 | /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t | |
211 | value -- needed when comparing unsigned to z_off64_t, which is signed | |
212 | (possible z_off64_t types off_t, off64_t, and long are all signed) */ | |
213 | #ifdef INT_MAX | |
214 | # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) | |
215 | #else | |
216 | unsigned ZLIB_INTERNAL gz_intmax OF((void)); | |
217 | # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) | |
218 | #endif |