source: trunk/minix/lib/zlib-1.2.3/contrib/minizip/ioapi.c@ 16

Last change on this file since 16 was 9, checked in by Mattia Monga, 14 years ago

Minix 3.1.2a
File size: 3.6 KB
RevLine 
[9]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
32voidpf ZCALLBACK fopen_file_func OF((
33 voidpf opaque,
34 const char* filename,
35 int mode));
36
37uLong ZCALLBACK fread_file_func OF((
38 voidpf opaque,
39 voidpf stream,
40 void* buf,
41 uLong size));
42
43uLong ZCALLBACK fwrite_file_func OF((
44 voidpf opaque,
45 voidpf stream,
46 const void* buf,
47 uLong size));
48
49long ZCALLBACK ftell_file_func OF((
50 voidpf opaque,
51 voidpf stream));
52
53long ZCALLBACK fseek_file_func OF((
54 voidpf opaque,
55 voidpf stream,
56 uLong offset,
57 int origin));
58
59int ZCALLBACK fclose_file_func OF((
60 voidpf opaque,
61 voidpf stream));
62
63int ZCALLBACK ferror_file_func OF((
64 voidpf opaque,
65 voidpf stream));
66
67
68voidpf 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
90uLong 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
102uLong 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
113long 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
122long 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
148int 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
157int 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
166void 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}
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