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 #ifndef __REACTOS__
70 void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
71 {
72     p_filefunc64_32->zfile_func64.zopen64_file = NULL;
73     p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
74     p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
75     p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
76     p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
77     p_filefunc64_32->zfile_func64.ztell64_file = NULL;
78     p_filefunc64_32->zfile_func64.zseek64_file = NULL;
79     p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
80     p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
81     p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
82     p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
83     p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
84 }
85 
86 
87 
88 static voidpf  ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
89 static uLong   ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
90 static uLong   ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
91 static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
92 static long    ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
93 static int     ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
94 static int     ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
95 
96 static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
97 {
98     (void)opaque;
99     FILE* file = NULL;
100     const char* mode_fopen = NULL;
101     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
102         mode_fopen = "rb";
103     else
104     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
105         mode_fopen = "r+b";
106     else
107     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
108         mode_fopen = "wb";
109 
110     if ((filename!=NULL) && (mode_fopen != NULL))
111         file = fopen(filename, mode_fopen);
112     return file;
113 }
114 
115 static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
116 {
117     (void)opaque;
118     FILE* file = NULL;
119     const char* mode_fopen = NULL;
120     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
121         mode_fopen = "rb";
122     else
123     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
124         mode_fopen = "r+b";
125     else
126     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
127         mode_fopen = "wb";
128 
129     if ((filename!=NULL) && (mode_fopen != NULL))
130         file = FOPEN_FUNC((const char*)filename, mode_fopen);
131     return file;
132 }
133 
134 
135 static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
136 {
137     (void)opaque;
138     uLong ret;
139     ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
140     return ret;
141 }
142 
143 static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
144 {
145     (void)opaque;
146     uLong ret;
147     ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
148     return ret;
149 }
150 
151 static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
152 {
153     (void)opaque;
154     long ret;
155     ret = ftell((FILE *)stream);
156     return ret;
157 }
158 
159 
160 static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
161 {
162     (void)opaque;
163     ZPOS64_T ret;
164     ret = (ZPOS64_T)FTELLO_FUNC((FILE *)stream);
165     return ret;
166 }
167 
168 static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offset, int origin)
169 {
170     (void)opaque;
171     int fseek_origin=0;
172     long ret;
173     switch (origin)
174     {
175     case ZLIB_FILEFUNC_SEEK_CUR :
176         fseek_origin = SEEK_CUR;
177         break;
178     case ZLIB_FILEFUNC_SEEK_END :
179         fseek_origin = SEEK_END;
180         break;
181     case ZLIB_FILEFUNC_SEEK_SET :
182         fseek_origin = SEEK_SET;
183         break;
184     default: return -1;
185     }
186     ret = 0;
187     if (fseek((FILE *)stream, (long)offset, fseek_origin) != 0)
188         ret = -1;
189     return ret;
190 }
191 
192 static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
193 {
194     (void)opaque;
195     int fseek_origin=0;
196     long ret;
197     switch (origin)
198     {
199     case ZLIB_FILEFUNC_SEEK_CUR :
200         fseek_origin = SEEK_CUR;
201         break;
202     case ZLIB_FILEFUNC_SEEK_END :
203         fseek_origin = SEEK_END;
204         break;
205     case ZLIB_FILEFUNC_SEEK_SET :
206         fseek_origin = SEEK_SET;
207         break;
208     default: return -1;
209     }
210     ret = 0;
211 
212     if(FSEEKO_FUNC((FILE *)stream, (long)offset, fseek_origin) != 0)
213                         ret = -1;
214 
215     return ret;
216 }
217 
218 
219 static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
220 {
221     (void)opaque;
222     int ret;
223     ret = fclose((FILE *)stream);
224     return ret;
225 }
226 
227 static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
228 {
229     (void)opaque;
230     int ret;
231     ret = ferror((FILE *)stream);
232     return ret;
233 }
234 
235 void fill_fopen_filefunc (pzlib_filefunc_def)
236   zlib_filefunc_def* pzlib_filefunc_def;
237 {
238     pzlib_filefunc_def->zopen_file = fopen_file_func;
239     pzlib_filefunc_def->zread_file = fread_file_func;
240     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
241     pzlib_filefunc_def->ztell_file = ftell_file_func;
242     pzlib_filefunc_def->zseek_file = fseek_file_func;
243     pzlib_filefunc_def->zclose_file = fclose_file_func;
244     pzlib_filefunc_def->zerror_file = ferror_file_func;
245     pzlib_filefunc_def->opaque = NULL;
246 }
247 
248 void fill_fopen64_filefunc (zlib_filefunc64_def*  pzlib_filefunc_def)
249 {
250     pzlib_filefunc_def->zopen64_file = fopen64_file_func;
251     pzlib_filefunc_def->zread_file = fread_file_func;
252     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
253     pzlib_filefunc_def->ztell64_file = ftell64_file_func;
254     pzlib_filefunc_def->zseek64_file = fseek64_file_func;
255     pzlib_filefunc_def->zclose_file = fclose_file_func;
256     pzlib_filefunc_def->zerror_file = ferror_file_func;
257     pzlib_filefunc_def->opaque = NULL;
258 }
259 
260 #endif
261