1 /* ioapi.h -- IO base function header for compress/uncompress .zip
2 part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
3
4 Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
5
6 Modifications for Zip64 support
7 Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
8
9 For more info read MiniZip_info.txt
10
11 */
12
13 #if defined(_WIN32) && (!(defined(_CRT_SECURE_NO_WARNINGS)))
14 #define _CRT_SECURE_NO_WARNINGS
15 #endif
16
17 #if defined(__APPLE__) || defined(IOAPI_NO_64)
18 // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
19 #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
20 #define FTELLO_FUNC(stream) ftello(stream)
21 #define FSEEKO_FUNC(stream, offset, origin) fseeko(stream, offset, origin)
22 #else
23 #define FOPEN_FUNC(filename, mode) fopen64(filename, mode)
24 #define FTELLO_FUNC(stream) ftello64(stream)
25 #define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
26 #endif
27
28
29 #include "ioapi.h"
30
31 voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
32 {
33 if (pfilefunc->zfile_func64.zopen64_file != NULL)
34 return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
35 else
36 {
37 return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
38 }
39 }
40
41 long call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
42 {
43 if (pfilefunc->zfile_func64.zseek64_file != NULL)
44 return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
45 else
46 {
47 uLong offsetTruncated = (uLong)offset;
48 if (offsetTruncated != offset)
49 return -1;
50 else
51 return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
52 }
53 }
54
55 ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
56 {
57 if (pfilefunc->zfile_func64.zseek64_file != NULL)
58 return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
59 else
60 {
61 uLong tell_uLong = (uLong)(*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
62 if ((tell_uLong) == MAXU32)
63 return (ZPOS64_T)-1;
64 else
65 return tell_uLong;
66 }
67 }
68
69 void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
70 {
71 p_filefunc64_32->zfile_func64.zopen64_file = NULL;
72 p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
73 p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
74 p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
75 p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
76 p_filefunc64_32->zfile_func64.ztell64_file = NULL;
77 p_filefunc64_32->zfile_func64.zseek64_file = NULL;
78 p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
79 p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
80 p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
81 p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
82 p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
83 }
84
85
86
87 static voidpf ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
88 static uLong ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
89 static uLong ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
90 static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
91 static long ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
92 static int ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
93 static int ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
94
95 static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
96 {
97 (void)opaque;
98 FILE* file = NULL;
99 const char* mode_fopen = NULL;
100 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
101 mode_fopen = "rb";
102 else
103 if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
104 mode_fopen = "r+b";
105 else
106 if (mode & ZLIB_FILEFUNC_MODE_CREATE)
107 mode_fopen = "wb";
108
109 if ((filename!=NULL) && (mode_fopen != NULL))
110 file = fopen(filename, mode_fopen);
111 return file;
112 }
113
114 static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
115 {
116 (void)opaque;
117 FILE* file = NULL;
118 const char* mode_fopen = NULL;
119 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
120 mode_fopen = "rb";
121 else
122 if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
123 mode_fopen = "r+b";
124 else
125 if (mode & ZLIB_FILEFUNC_MODE_CREATE)
126 mode_fopen = "wb";
127
128 if ((filename!=NULL) && (mode_fopen != NULL))
129 file = FOPEN_FUNC((const char*)filename, mode_fopen);
130 return file;
131 }
132
133
134 static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
135 {
136 (void)opaque;
137 uLong ret;
138 ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
139 return ret;
140 }
141
142 static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
143 {
144 (void)opaque;
145 uLong ret;
146 ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
147 return ret;
148 }
149
150 static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
151 {
152 (void)opaque;
153 long ret;
154 ret = ftell((FILE *)stream);
155 return ret;
156 }
157
158
159 static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
160 {
161 (void)opaque;
162 ZPOS64_T ret;
163 ret = (ZPOS64_T)FTELLO_FUNC((FILE *)stream);
164 return ret;
165 }
166
167 static long ZCALLBACK fseek_file_func (voidpf opaque, voidpf stream, uLong offset, int origin)
168 {
169 (void)opaque;
170 int fseek_origin=0;
171 long ret;
172 switch (origin)
173 {
174 case ZLIB_FILEFUNC_SEEK_CUR :
175 fseek_origin = SEEK_CUR;
176 break;
177 case ZLIB_FILEFUNC_SEEK_END :
178 fseek_origin = SEEK_END;
179 break;
180 case ZLIB_FILEFUNC_SEEK_SET :
181 fseek_origin = SEEK_SET;
182 break;
183 default: return -1;
184 }
185 ret = 0;
186 if (fseek((FILE *)stream, (long)offset, fseek_origin) != 0)
187 ret = -1;
188 return ret;
189 }
190
191 static long ZCALLBACK fseek64_file_func (voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
192 {
193 (void)opaque;
194 int fseek_origin=0;
195 long ret;
196 switch (origin)
197 {
198 case ZLIB_FILEFUNC_SEEK_CUR :
199 fseek_origin = SEEK_CUR;
200 break;
201 case ZLIB_FILEFUNC_SEEK_END :
202 fseek_origin = SEEK_END;
203 break;
204 case ZLIB_FILEFUNC_SEEK_SET :
205 fseek_origin = SEEK_SET;
206 break;
207 default: return -1;
208 }
209 ret = 0;
210
211 if(FSEEKO_FUNC((FILE *)stream, (long)offset, fseek_origin) != 0)
212 ret = -1;
213
214 return ret;
215 }
216
217
218 static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
219 {
220 (void)opaque;
221 int ret;
222 ret = fclose((FILE *)stream);
223 return ret;
224 }
225
226 static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
227 {
228 (void)opaque;
229 int ret;
230 ret = ferror((FILE *)stream);
231 return ret;
232 }
233
234 void fill_fopen_filefunc (pzlib_filefunc_def)
235 zlib_filefunc_def* pzlib_filefunc_def;
236 {
237 pzlib_filefunc_def->zopen_file = fopen_file_func;
238 pzlib_filefunc_def->zread_file = fread_file_func;
239 pzlib_filefunc_def->zwrite_file = fwrite_file_func;
240 pzlib_filefunc_def->ztell_file = ftell_file_func;
241 pzlib_filefunc_def->zseek_file = fseek_file_func;
242 pzlib_filefunc_def->zclose_file = fclose_file_func;
243 pzlib_filefunc_def->zerror_file = ferror_file_func;
244 pzlib_filefunc_def->opaque = NULL;
245 }
246
247 void fill_fopen64_filefunc (zlib_filefunc64_def* pzlib_filefunc_def)
248 {
249 pzlib_filefunc_def->zopen64_file = fopen64_file_func;
250 pzlib_filefunc_def->zread_file = fread_file_func;
251 pzlib_filefunc_def->zwrite_file = fwrite_file_func;
252 pzlib_filefunc_def->ztell64_file = ftell64_file_func;
253 pzlib_filefunc_def->zseek64_file = fseek64_file_func;
254 pzlib_filefunc_def->zclose_file = fclose_file_func;
255 pzlib_filefunc_def->zerror_file = ferror_file_func;
256 pzlib_filefunc_def->opaque = NULL;
257 }