Merge pull request #517 from negativeExponent/input
[pcsx_rearmed.git] / deps / libchdr / deps / zlib-1.2.11 / gzguts.h
CommitLineData
b24e7fce 1/* gzguts.h -- zlib internal header definitions for gz* operations
2 * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
3 * For conditions of distribution and use, see copyright notice in zlib.h
4 */
5
c91c9a0e 6#ifndef _WIN32
7# include <unistd.h>
8#endif
9
b24e7fce 10#ifdef _LARGEFILE64_SOURCE
11# ifndef _LARGEFILE_SOURCE
12# define _LARGEFILE_SOURCE 1
13# endif
14# ifdef _FILE_OFFSET_BITS
15# undef _FILE_OFFSET_BITS
16# endif
17#endif
18
19#ifdef HAVE_HIDDEN
20# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
21#else
22# define ZLIB_INTERNAL
23#endif
24
25#include <stdio.h>
26#include "zlib.h"
27#ifdef STDC
28# include <string.h>
29# include <stdlib.h>
30# include <limits.h>
31#endif
32
33#ifndef _POSIX_SOURCE
34# define _POSIX_SOURCE
35#endif
36#include <fcntl.h>
37
38#ifdef _WIN32
39# include <stddef.h>
40#endif
41
42#if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32)
43# include <io.h>
44#endif
45
46#if defined(_WIN32) || defined(__CYGWIN__)
47# define WIDECHAR
48#endif
49
50#ifdef WINAPI_FAMILY
51# define open _open
52# define read _read
53# define write _write
54# define close _close
55#endif
56
57#ifdef NO_DEFLATE /* for compatibility with old definition */
58# define NO_GZCOMPRESS
59#endif
60
61#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
62# ifndef HAVE_VSNPRINTF
63# define HAVE_VSNPRINTF
64# endif
65#endif
66
67#if defined(__CYGWIN__)
68# ifndef HAVE_VSNPRINTF
69# define HAVE_VSNPRINTF
70# endif
71#endif
72
73#if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
74# ifndef HAVE_VSNPRINTF
75# define HAVE_VSNPRINTF
76# endif
77#endif
78
79#ifndef HAVE_VSNPRINTF
80# ifdef MSDOS
81/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
82 but for now we just assume it doesn't. */
83# define NO_vsnprintf
84# endif
85# ifdef __TURBOC__
86# define NO_vsnprintf
87# endif
88# ifdef WIN32
89/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
90# if !defined(vsnprintf) && !defined(NO_vsnprintf)
91# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
92# define vsnprintf _vsnprintf
93# endif
94# endif
95# endif
96# ifdef __SASC
97# define NO_vsnprintf
98# endif
99# ifdef VMS
100# define NO_vsnprintf
101# endif
102# ifdef __OS400__
103# define NO_vsnprintf
104# endif
105# ifdef __MVS__
106# define NO_vsnprintf
107# endif
108#endif
109
110/* unlike snprintf (which is required in C99), _snprintf does not guarantee
111 null termination of the result -- however this is only used in gzlib.c where
112 the result is assured to fit in the space provided */
113#if defined(_MSC_VER) && _MSC_VER < 1900
114# define snprintf _snprintf
115#endif
116
117#ifndef local
118# define local static
119#endif
120/* since "static" is used to mean two completely different things in C, we
121 define "local" for the non-static meaning of "static", for readability
122 (compile with -Dlocal if your debugger can't find static symbols) */
123
124/* gz* functions always use library allocation functions */
125#ifndef STDC
126 extern voidp malloc OF((uInt size));
127 extern void free OF((voidpf ptr));
128#endif
129
130/* get errno and strerror definition */
131#if defined UNDER_CE
132# include <windows.h>
133# define zstrerror() gz_strwinerror((DWORD)GetLastError())
134#else
135# ifndef NO_STRERROR
136# include <errno.h>
137# define zstrerror() strerror(errno)
138# else
139# define zstrerror() "stdio error (consult errno)"
140# endif
141#endif
142
143/* provide prototypes for these when building zlib without LFS */
144#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
145 ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
146 ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
147 ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
148 ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
149#endif
150
151/* default memLevel */
152#if MAX_MEM_LEVEL >= 8
153# define DEF_MEM_LEVEL 8
154#else
155# define DEF_MEM_LEVEL MAX_MEM_LEVEL
156#endif
157
158/* default i/o buffer size -- double this for output when reading (this and
159 twice this must be able to fit in an unsigned type) */
160#define GZBUFSIZE 8192
161
162/* gzip modes, also provide a little integrity check on the passed structure */
163#define GZ_NONE 0
164#define GZ_READ 7247
165#define GZ_WRITE 31153
166#define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */
167
168/* values for gz_state how */
169#define LOOK 0 /* look for a gzip header */
170#define COPY 1 /* copy input directly */
171#define GZIP 2 /* decompress a gzip stream */
172
173/* internal gzip file state data structure */
174typedef struct {
175 /* exposed contents for gzgetc() macro */
176 struct gzFile_s x; /* "x" for exposed */
177 /* x.have: number of bytes available at x.next */
178 /* x.next: next output data to deliver or write */
179 /* x.pos: current position in uncompressed data */
180 /* used for both reading and writing */
181 int mode; /* see gzip modes above */
182 int fd; /* file descriptor */
183 char *path; /* path or fd for error messages */
184 unsigned size; /* buffer size, zero if not allocated yet */
185 unsigned want; /* requested buffer size, default is GZBUFSIZE */
186 unsigned char *in; /* input buffer (double-sized when writing) */
187 unsigned char *out; /* output buffer (double-sized when reading) */
188 int direct; /* 0 if processing gzip, 1 if transparent */
189 /* just for reading */
190 int how; /* 0: get header, 1: copy, 2: decompress */
191 z_off64_t start; /* where the gzip data started, for rewinding */
192 int eof; /* true if end of input file reached */
193 int past; /* true if read requested past end */
194 /* just for writing */
195 int level; /* compression level */
196 int strategy; /* compression strategy */
197 /* seek request */
198 z_off64_t skip; /* amount to skip (already rewound if backwards) */
199 int seek; /* true if seek request pending */
200 /* error information */
201 int err; /* error code */
202 char *msg; /* error message */
203 /* zlib inflate or deflate stream */
204 z_stream strm; /* stream structure in-place (not a pointer) */
205} gz_state;
206typedef gz_state FAR *gz_statep;
207
208/* shared functions */
209void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
210#if defined UNDER_CE
211char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
212#endif
213
214/* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
215 value -- needed when comparing unsigned to z_off64_t, which is signed
216 (possible z_off64_t types off_t, off64_t, and long are all signed) */
217#ifdef INT_MAX
218# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
219#else
220unsigned ZLIB_INTERNAL gz_intmax OF((void));
221# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
222#endif