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