1
|
1 |
/* ioapi.c -- IO base function header for compress/uncompress .zip
|
|
2 |
files using zlib + zip or unzip API
|
|
3 |
|
|
4 |
Version 1.01e, February 12th, 2005
|
|
5 |
|
|
6 |
Copyright (C) 1998-2005 Gilles Vollant
|
|
7 |
*/
|
|
8 |
|
|
9 |
#include <stdio.h>
|
|
10 |
#include <stdlib.h>
|
|
11 |
#include <string.h>
|
|
12 |
|
|
13 |
#include "zlib.h"
|
|
14 |
#include "ioapi.h"
|
|
15 |
|
|
16 |
|
|
17 |
|
|
18 |
/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
|
|
19 |
|
|
20 |
#ifndef SEEK_CUR
|
|
21 |
#define SEEK_CUR 1
|
|
22 |
#endif
|
|
23 |
|
|
24 |
#ifndef SEEK_END
|
|
25 |
#define SEEK_END 2
|
|
26 |
#endif
|
|
27 |
|
|
28 |
#ifndef SEEK_SET
|
|
29 |
#define SEEK_SET 0
|
|
30 |
#endif
|
|
31 |
|
|
32 |
voidpf ZCALLBACK fopen_file_func OF((
|
|
33 |
voidpf opaque,
|
|
34 |
const char* filename,
|
|
35 |
int mode));
|
|
36 |
|
|
37 |
uLong ZCALLBACK fread_file_func OF((
|
|
38 |
voidpf opaque,
|
|
39 |
voidpf stream,
|
|
40 |
void* buf,
|
|
41 |
uLong size));
|
|
42 |
|
|
43 |
uLong ZCALLBACK fwrite_file_func OF((
|
|
44 |
voidpf opaque,
|
|
45 |
voidpf stream,
|
|
46 |
const void* buf,
|
|
47 |
uLong size));
|
|
48 |
|
|
49 |
long ZCALLBACK ftell_file_func OF((
|
|
50 |
voidpf opaque,
|
|
51 |
voidpf stream));
|
|
52 |
|
|
53 |
long ZCALLBACK fseek_file_func OF((
|
|
54 |
voidpf opaque,
|
|
55 |
voidpf stream,
|
|
56 |
uLong offset,
|
|
57 |
int origin));
|
|
58 |
|
|
59 |
int ZCALLBACK fclose_file_func OF((
|
|
60 |
voidpf opaque,
|
|
61 |
voidpf stream));
|
|
62 |
|
|
63 |
int ZCALLBACK ferror_file_func OF((
|
|
64 |
voidpf opaque,
|
|
65 |
voidpf stream));
|
|
66 |
|
|
67 |
|
|
68 |
voidpf ZCALLBACK fopen_file_func (opaque, filename, mode)
|
|
69 |
voidpf opaque;
|
|
70 |
const char* filename;
|
|
71 |
int mode;
|
|
72 |
{
|
|
73 |
FILE* file = NULL;
|
|
74 |
const char* mode_fopen = NULL;
|
|
75 |
if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
|
|
76 |
mode_fopen = "rb";
|
|
77 |
else
|
|
78 |
if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
|
|
79 |
mode_fopen = "r+b";
|
|
80 |
else
|
|
81 |
if (mode & ZLIB_FILEFUNC_MODE_CREATE)
|
|
82 |
mode_fopen = "wb";
|
|
83 |
|
|
84 |
if ((filename!=NULL) && (mode_fopen != NULL))
|
|
85 |
file = fopen(filename, mode_fopen);
|
|
86 |
return file;
|
|
87 |
}
|
|
88 |
|
|
89 |
|
|
90 |
uLong ZCALLBACK fread_file_func (opaque, stream, buf, size)
|
|
91 |
voidpf opaque;
|
|
92 |
voidpf stream;
|
|
93 |
void* buf;
|
|
94 |
uLong size;
|
|
95 |
{
|
|
96 |
uLong ret;
|
|
97 |
ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
|
|
98 |
return ret;
|
|
99 |
}
|
|
100 |
|
|
101 |
|
|
102 |
uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size)
|
|
103 |
voidpf opaque;
|
|
104 |
voidpf stream;
|
|
105 |
const void* buf;
|
|
106 |
uLong size;
|
|
107 |
{
|
|
108 |
uLong ret;
|
|
109 |
ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
|
|
110 |
return ret;
|
|
111 |
}
|
|
112 |
|
|
113 |
long ZCALLBACK ftell_file_func (opaque, stream)
|
|
114 |
voidpf opaque;
|
|
115 |
voidpf stream;
|
|
116 |
{
|
|
117 |
long ret;
|
|
118 |
ret = ftell((FILE *)stream);
|
|
119 |
return ret;
|
|
120 |
}
|
|
121 |
|
|
122 |
long ZCALLBACK fseek_file_func (opaque, stream, offset, origin)
|
|
123 |
voidpf opaque;
|
|
124 |
voidpf stream;
|
|
125 |
uLong offset;
|
|
126 |
int origin;
|
|
127 |
{
|
|
128 |
int fseek_origin=0;
|
|
129 |
long ret;
|
|
130 |
switch (origin)
|
|
131 |
{
|
|
132 |
case ZLIB_FILEFUNC_SEEK_CUR :
|
|
133 |
fseek_origin = SEEK_CUR;
|
|
134 |
break;
|
|
135 |
case ZLIB_FILEFUNC_SEEK_END :
|
|
136 |
fseek_origin = SEEK_END;
|
|
137 |
break;
|
|
138 |
case ZLIB_FILEFUNC_SEEK_SET :
|
|
139 |
fseek_origin = SEEK_SET;
|
|
140 |
break;
|
|
141 |
default: return -1;
|
|
142 |
}
|
|
143 |
ret = 0;
|
|
144 |
fseek((FILE *)stream, offset, fseek_origin);
|
|
145 |
return ret;
|
|
146 |
}
|
|
147 |
|
|
148 |
int ZCALLBACK fclose_file_func (opaque, stream)
|
|
149 |
voidpf opaque;
|
|
150 |
voidpf stream;
|
|
151 |
{
|
|
152 |
int ret;
|
|
153 |
ret = fclose((FILE *)stream);
|
|
154 |
return ret;
|
|
155 |
}
|
|
156 |
|
|
157 |
int ZCALLBACK ferror_file_func (opaque, stream)
|
|
158 |
voidpf opaque;
|
|
159 |
voidpf stream;
|
|
160 |
{
|
|
161 |
int ret;
|
|
162 |
ret = ferror((FILE *)stream);
|
|
163 |
return ret;
|
|
164 |
}
|
|
165 |
|
|
166 |
void fill_fopen_filefunc (pzlib_filefunc_def)
|
|
167 |
zlib_filefunc_def* pzlib_filefunc_def;
|
|
168 |
{
|
|
169 |
pzlib_filefunc_def->zopen_file = fopen_file_func;
|
|
170 |
pzlib_filefunc_def->zread_file = fread_file_func;
|
|
171 |
pzlib_filefunc_def->zwrite_file = fwrite_file_func;
|
|
172 |
pzlib_filefunc_def->ztell_file = ftell_file_func;
|
|
173 |
pzlib_filefunc_def->zseek_file = fseek_file_func;
|
|
174 |
pzlib_filefunc_def->zclose_file = fclose_file_func;
|
|
175 |
pzlib_filefunc_def->zerror_file = ferror_file_func;
|
|
176 |
pzlib_filefunc_def->opaque = NULL;
|
|
177 |
}
|