Contents of /trunk/src/ioapi.c

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Sat Jun 20 11:08:47 2009 UTC (14 years, 11 months ago) by harbaum
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Initial import
1 harbaum 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     }