gzguts.h@ 104196

Last change on this file since 104196 was 97809, checked in by vboxsync, 2 years ago
libs/zlib: fixed incorrect change tagging. bugref:10261
Property svn:eol-style set to `native`
File size: 9.0 KB

Line
1	/* gzguts.h -- zlib internal header definitions for gz* operations
2	* Copyright (C) 2004-2019 Mark Adler
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
15	#ifdef HAVE_HIDDEN
16	# define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
17	#else
18	# define ZLIB_INTERNAL
19	#endif
20
21	#ifndef IPRT_NO_CRT /* VBox */
22	#include <stdio.h>
23	#endif /* VBox */
24	#include "zlib.h"
25	#ifdef STDC
26	# include <string.h>
27	# include <stdlib.h>
28	# include <limits.h>
29	#endif
30
31	#ifndef _POSIX_SOURCE
32	# define _POSIX_SOURCE
33	#endif
34	#ifndef IPRT_NO_CRT /* VBox */
35	#include <fcntl.h>
36	#endif
37	/* VBox */
38	#ifdef _WIN32
39	# include <stddef.h>
40	#endif
41
42	#ifndef IPRT_NO_CRT /* VBox */
43	#if defined(__TURBOC__) \|\| defined(_MSC_VER) \|\| defined(_WIN32)
44	# include <io.h>
45	#endif
46	#else /* VBox */
47	# include <iprt/file.h> /* VBox */
48	# include <iprt/errcore.h> /* VBox */
49	#endif /* VBox */
50
51	#ifndef IPRT_NO_CRT /* VBox */
52	#if defined(_WIN32)
53	# define WIDECHAR
54	#endif
55	#endif /* VBox */
56
57	#ifdef WINAPI_FAMILY
58	# define open _open
59	# define read _read
60	# define write _write
61	# define close _close
62	#endif
63
64	#ifdef NO_DEFLATE /* for compatibility with old definition */
65	# define NO_GZCOMPRESS
66	#endif
67
68	#ifdef IPRT_NO_CRT /* VBox */
69	# include <iprt/string.h> /* VBox */
70	# define HAVE_VSNPRINTF /* VBox */
71	# define snprintf RTStrPrintf /* VBox */
72	# define vsnprintf RTStrPrintfV /* VBox */
73	#else /* !IPRT_NO_CRT / / VBox */
74
75	#if defined(STDC99) \|\| (defined(__TURBOC__) && __TURBOC__ >= 0x550)
76	# ifndef HAVE_VSNPRINTF
77	# define HAVE_VSNPRINTF
78	# endif
79	#endif
80
81	#if defined(__CYGWIN__)
82	# ifndef HAVE_VSNPRINTF
83	# define HAVE_VSNPRINTF
84	# endif
85	#endif
86
87	#if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
88	# ifndef HAVE_VSNPRINTF
89	# define HAVE_VSNPRINTF
90	# endif
91	#endif
92
93	#ifndef HAVE_VSNPRINTF
94	# ifdef MSDOS
95	/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
96	but for now we just assume it doesn't. */
97	# define NO_vsnprintf
98	# endif
99	# ifdef __TURBOC__
100	# define NO_vsnprintf
101	# endif
102	# ifdef WIN32
103	/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
104	# if !defined(vsnprintf) && !defined(NO_vsnprintf)
105	# if !defined(_MSC_VER) \|\| ( defined(_MSC_VER) && _MSC_VER < 1500 )
106	# define vsnprintf _vsnprintf
107	# endif
108	# endif
109	# endif
110	# ifdef __SASC
111	# define NO_vsnprintf
112	# endif
113	# ifdef VMS
114	# define NO_vsnprintf
115	# endif
116	# ifdef __OS400__
117	# define NO_vsnprintf
118	# endif
119	# ifdef __MVS__
120	# define NO_vsnprintf
121	# endif
122	#endif
123
124	/* unlike snprintf (which is required in C99), _snprintf does not guarantee
125	null termination of the result -- however this is only used in gzlib.c where
126	the result is assured to fit in the space provided */
127	#if defined(_MSC_VER) && _MSC_VER < 1900
128	# define snprintf _snprintf
129	#endif
130	/* VBox */
131	#endif /* !IPRT_NO_CRT / / VBox */
132
133	#ifndef local
134	# define local static
135	#endif
136	/* since "static" is used to mean two completely different things in C, we
137	define "local" for the non-static meaning of "static", for readability
138	(compile with -Dlocal if your debugger can't find static symbols) */
139
140	/* gz* functions always use library allocation functions */
141	#ifndef STDC
142	extern voidp malloc OF((uInt size));
143	extern void free OF((voidpf ptr));
144	#endif
145
146	/* get errno and strerror definition */
147	#if defined UNDER_CE \|\| (defined(IPRT_NO_CRT) && defined(RT_OS_WINDOWS))
148	# include <windows.h>
149	# define zstrerror() gz_strwinerror((DWORD)GetLastError())
150	#else
151	# ifndef NO_STRERROR
152	# include <errno.h>
153	# define zstrerror() strerror(errno)
154	# else
155	# define zstrerror() "stdio error (consult errno)"
156	# endif
157	#endif
158
159	/* provide prototypes for these when building zlib without LFS */
160	#if !defined(_LARGEFILE64_SOURCE) \|\| _LFS64_LARGEFILE-0 == 0
161	ZEXTERN gzFile ZEXPORT gzopen64 OF((const char , const char ));
162	ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
163	ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
164	ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
165	#endif
166
167	/* default memLevel */
168	#if MAX_MEM_LEVEL >= 8
169	# define DEF_MEM_LEVEL 8
170	#else
171	# define DEF_MEM_LEVEL MAX_MEM_LEVEL
172	#endif
173
174	/* default i/o buffer size -- double this for output when reading (this and
175	twice this must be able to fit in an unsigned type) */
176	#define GZBUFSIZE 8192
177
178	/* gzip modes, also provide a little integrity check on the passed structure */
179	#define GZ_NONE 0
180	#define GZ_READ 7247
181	#define GZ_WRITE 31153
182	#define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */
183
184	/* values for gz_state how */
185	#define LOOK 0 /* look for a gzip header */
186	#define COPY 1 /* copy input directly */
187	#define GZIP 2 /* decompress a gzip stream */
188
189	/* internal gzip file state data structure */
190	typedef struct {
191	/* exposed contents for gzgetc() macro */
192	struct gzFile_s x; /* "x" for exposed */
193	/* x.have: number of bytes available at x.next */
194	/* x.next: next output data to deliver or write */
195	/* x.pos: current position in uncompressed data */
196	/* used for both reading and writing */
197	int mode; /* see gzip modes above */
198	#ifndef IPRT_NO_CRT
199	int fd; /* file descriptor */
200	#else
201	RTFILE fd; /* file descriptor */
202	#endif
203	char path; / path or fd for error messages */
204	unsigned size; /* buffer size, zero if not allocated yet */
205	unsigned want; /* requested buffer size, default is GZBUFSIZE */
206	unsigned char in; / input buffer (double-sized when writing) */
207	unsigned char out; / output buffer (double-sized when reading) */
208	int direct; /* 0 if processing gzip, 1 if transparent */
209	/* just for reading */
210	int how; /* 0: get header, 1: copy, 2: decompress */
211	z_off64_t start; /* where the gzip data started, for rewinding */
212	int eof; /* true if end of input file reached */
213	int past; /* true if read requested past end */
214	/* just for writing */
215	int level; /* compression level */
216	int strategy; /* compression strategy */
217	int reset; /* true if a reset is pending after a Z_FINISH */
218	/* seek request */
219	z_off64_t skip; /* amount to skip (already rewound if backwards) */
220	int seek; /* true if seek request pending */
221	/* error information */
222	int err; /* error code */
223	char msg; / error message */
224	/* zlib inflate or deflate stream */
225	z_stream strm; /* stream structure in-place (not a pointer) */
226	} gz_state;
227	typedef gz_state FAR *gz_statep;
228
229	/* shared functions */
230	void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
231	#if defined UNDER_CE \|\| (defined(IPRT_NO_CRT) && defined(RT_OS_WINDOWS))
232	char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
233	#endif
234
235	/* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
236	value -- needed when comparing unsigned to z_off64_t, which is signed
237	(possible z_off64_t types off_t, off64_t, and long are all signed) */
238	#ifdef INT_MAX
239	# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
240	#else
241	unsigned ZLIB_INTERNAL gz_intmax OF((void));
242	# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
243	#endif

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source: vbox/trunk/src/libs/zlib-1.2.13/gzguts.h@ 104196

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