| 1 |
cycrow |
1 |
/* gzguts.h -- zlib internal header definitions for gz* operations
|
|
|
2 |
* Copyright (C) 2004, 2005, 2010 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 |
#if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ)
|
|
|
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
|
|
|
28 |
#include <fcntl.h>
|
|
|
29 |
|
|
|
30 |
#ifdef NO_DEFLATE /* for compatibility with old definition */
|
|
|
31 |
# define NO_GZCOMPRESS
|
|
|
32 |
#endif
|
|
|
33 |
|
|
|
34 |
#ifdef _MSC_VER
|
|
|
35 |
# include <io.h>
|
|
|
36 |
# define vsnprintf _vsnprintf
|
|
|
37 |
#endif
|
|
|
38 |
|
|
|
39 |
#ifndef local
|
|
|
40 |
# define local static
|
|
|
41 |
#endif
|
|
|
42 |
/* compile with -Dlocal if your debugger can't find static symbols */
|
|
|
43 |
|
|
|
44 |
/* gz* functions always use library allocation functions */
|
|
|
45 |
#ifndef STDC
|
|
|
46 |
extern voidp malloc OF((uInt size));
|
|
|
47 |
extern void free OF((voidpf ptr));
|
|
|
48 |
#endif
|
|
|
49 |
|
|
|
50 |
/* get errno and strerror definition */
|
|
|
51 |
#if defined UNDER_CE
|
|
|
52 |
# include <windows.h>
|
|
|
53 |
# define zstrerror() gz_strwinerror((DWORD)GetLastError())
|
|
|
54 |
#else
|
|
|
55 |
# ifdef STDC
|
|
|
56 |
# include <errno.h>
|
|
|
57 |
# define zstrerror() strerror(errno)
|
|
|
58 |
# else
|
|
|
59 |
# define zstrerror() "stdio error (consult errno)"
|
|
|
60 |
# endif
|
|
|
61 |
#endif
|
|
|
62 |
|
|
|
63 |
/* provide prototypes for these when building zlib without LFS */
|
|
|
64 |
#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
|
|
|
65 |
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
|
|
|
66 |
ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
|
|
|
67 |
ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
|
|
|
68 |
ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
|
|
|
69 |
#endif
|
|
|
70 |
|
|
|
71 |
/* default i/o buffer size -- double this for output when reading */
|
|
|
72 |
#define GZBUFSIZE 8192
|
|
|
73 |
|
|
|
74 |
/* gzip modes, also provide a little integrity check on the passed structure */
|
|
|
75 |
#define GZ_NONE 0
|
|
|
76 |
#define GZ_READ 7247
|
|
|
77 |
#define GZ_WRITE 31153
|
|
|
78 |
#define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */
|
|
|
79 |
|
|
|
80 |
/* values for gz_state how */
|
|
|
81 |
#define LOOK 0 /* look for a gzip header */
|
|
|
82 |
#define COPY 1 /* copy input directly */
|
|
|
83 |
#define GZIP 2 /* decompress a gzip stream */
|
|
|
84 |
|
|
|
85 |
/* internal gzip file state data structure */
|
|
|
86 |
typedef struct {
|
|
|
87 |
/* used for both reading and writing */
|
|
|
88 |
int mode; /* see gzip modes above */
|
|
|
89 |
int fd; /* file descriptor */
|
|
|
90 |
char *path; /* path or fd for error messages */
|
|
|
91 |
z_off64_t pos; /* current position in uncompressed data */
|
|
|
92 |
unsigned size; /* buffer size, zero if not allocated yet */
|
|
|
93 |
unsigned want; /* requested buffer size, default is GZBUFSIZE */
|
|
|
94 |
unsigned char *in; /* input buffer */
|
|
|
95 |
unsigned char *out; /* output buffer (double-sized when reading) */
|
|
|
96 |
unsigned char *next; /* next output data to deliver or write */
|
|
|
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 */
|
|
|
102 |
int how; /* 0: get header, 1: copy, 2: decompress */
|
|
|
103 |
int direct; /* true if last read direct, false if gzip */
|
|
|
104 |
/* just for writing */
|
|
|
105 |
int level; /* compression level */
|
|
|
106 |
int strategy; /* compression strategy */
|
|
|
107 |
/* seek request */
|
|
|
108 |
z_off64_t skip; /* amount to skip (already rewound if backwards) */
|
|
|
109 |
int seek; /* true if seek request pending */
|
|
|
110 |
/* error information */
|
|
|
111 |
int err; /* error code */
|
|
|
112 |
char *msg; /* error message */
|
|
|
113 |
/* zlib inflate or deflate stream */
|
|
|
114 |
z_stream strm; /* stream structure in-place (not a pointer) */
|
|
|
115 |
} gz_state;
|
|
|
116 |
typedef gz_state FAR *gz_statep;
|
|
|
117 |
|
|
|
118 |
/* shared functions */
|
|
|
119 |
void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
|
|
|
120 |
#if defined UNDER_CE
|
|
|
121 |
char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
|
|
|
122 |
#endif
|
|
|
123 |
|
|
|
124 |
/* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
|
|
|
125 |
value -- needed when comparing unsigned to z_off64_t, which is signed
|
|
|
126 |
(possible z_off64_t types off_t, off64_t, and long are all signed) */
|
|
|
127 |
#ifdef INT_MAX
|
|
|
128 |
# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
|
|
|
129 |
#else
|
|
|
130 |
unsigned ZLIB_INTERNAL gz_intmax OF((void));
|
|
|
131 |
# define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
|
|
|
132 |
#endif
|