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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 
call_zopen64(const zlib_filefunc64_32_def * pfilefunc,const void * filename,int mode)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 
call_zseek64(const zlib_filefunc64_32_def * pfilefunc,voidpf filestream,ZPOS64_T offset,int origin)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 
call_ztell64(const zlib_filefunc64_32_def * pfilefunc,voidpf filestream)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 = (*(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 
fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def * p_filefunc64_32,const zlib_filefunc_def * p_filefunc32)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 
fopen_file_func(voidpf opaque,const char * filename,int mode)95 static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
96 {
97     FILE* file = NULL;
98     const char* mode_fopen = NULL;
99     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
100         mode_fopen = "rb";
101     else
102     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
103         mode_fopen = "r+b";
104     else
105     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
106         mode_fopen = "wb";
107 
108     if ((filename!=NULL) && (mode_fopen != NULL))
109         file = fopen(filename, mode_fopen);
110     return file;
111 }
112 
fopen64_file_func(voidpf opaque,const void * filename,int mode)113 static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
114 {
115     FILE* file = NULL;
116     const char* mode_fopen = NULL;
117     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
118         mode_fopen = "rb";
119     else
120     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
121         mode_fopen = "r+b";
122     else
123     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
124         mode_fopen = "wb";
125 
126     if ((filename!=NULL) && (mode_fopen != NULL))
127         file = FOPEN_FUNC((const char*)filename, mode_fopen);
128     return file;
129 }
130 
131 
fread_file_func(voidpf opaque,voidpf stream,void * buf,uLong size)132 static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
133 {
134     uLong ret;
135     ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
136     return ret;
137 }
138 
fwrite_file_func(voidpf opaque,voidpf stream,const void * buf,uLong size)139 static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
140 {
141     uLong ret;
142     ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
143     return ret;
144 }
145 
ftell_file_func(voidpf opaque,voidpf stream)146 static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
147 {
148     long ret;
149     ret = ftell((FILE *)stream);
150     return ret;
151 }
152 
153 
ftell64_file_func(voidpf opaque,voidpf stream)154 static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
155 {
156     ZPOS64_T ret;
157     ret = FTELLO_FUNC((FILE *)stream);
158     return ret;
159 }
160 
fseek_file_func(voidpf opaque,voidpf stream,uLong offset,int origin)161 static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offset, int origin)
162 {
163     int fseek_origin=0;
164     long ret;
165     switch (origin)
166     {
167     case ZLIB_FILEFUNC_SEEK_CUR :
168         fseek_origin = SEEK_CUR;
169         break;
170     case ZLIB_FILEFUNC_SEEK_END :
171         fseek_origin = SEEK_END;
172         break;
173     case ZLIB_FILEFUNC_SEEK_SET :
174         fseek_origin = SEEK_SET;
175         break;
176     default: return -1;
177     }
178     ret = 0;
179     if (fseek((FILE *)stream, offset, fseek_origin) != 0)
180         ret = -1;
181     return ret;
182 }
183 
fseek64_file_func(voidpf opaque,voidpf stream,ZPOS64_T offset,int origin)184 static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
185 {
186     int fseek_origin=0;
187     long ret;
188     switch (origin)
189     {
190     case ZLIB_FILEFUNC_SEEK_CUR :
191         fseek_origin = SEEK_CUR;
192         break;
193     case ZLIB_FILEFUNC_SEEK_END :
194         fseek_origin = SEEK_END;
195         break;
196     case ZLIB_FILEFUNC_SEEK_SET :
197         fseek_origin = SEEK_SET;
198         break;
199     default: return -1;
200     }
201     ret = 0;
202 
203     if(FSEEKO_FUNC((FILE *)stream, offset, fseek_origin) != 0)
204                         ret = -1;
205 
206     return ret;
207 }
208 
209 
fclose_file_func(voidpf opaque,voidpf stream)210 static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
211 {
212     int ret;
213     ret = fclose((FILE *)stream);
214     return ret;
215 }
216 
ferror_file_func(voidpf opaque,voidpf stream)217 static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
218 {
219     int ret;
220     ret = ferror((FILE *)stream);
221     return ret;
222 }
223 
fill_fopen_filefunc(pzlib_filefunc_def)224 void fill_fopen_filefunc (pzlib_filefunc_def)
225   zlib_filefunc_def* pzlib_filefunc_def;
226 {
227     pzlib_filefunc_def->zopen_file = fopen_file_func;
228     pzlib_filefunc_def->zread_file = fread_file_func;
229     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
230     pzlib_filefunc_def->ztell_file = ftell_file_func;
231     pzlib_filefunc_def->zseek_file = fseek_file_func;
232     pzlib_filefunc_def->zclose_file = fclose_file_func;
233     pzlib_filefunc_def->zerror_file = ferror_file_func;
234     pzlib_filefunc_def->opaque = NULL;
235 }
236 
fill_fopen64_filefunc(zlib_filefunc64_def * pzlib_filefunc_def)237 void fill_fopen64_filefunc (zlib_filefunc64_def*  pzlib_filefunc_def)
238 {
239     pzlib_filefunc_def->zopen64_file = fopen64_file_func;
240     pzlib_filefunc_def->zread_file = fread_file_func;
241     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
242     pzlib_filefunc_def->ztell64_file = ftell64_file_func;
243     pzlib_filefunc_def->zseek64_file = fseek64_file_func;
244     pzlib_filefunc_def->zclose_file = fclose_file_func;
245     pzlib_filefunc_def->zerror_file = ferror_file_func;
246     pzlib_filefunc_def->opaque = NULL;
247 }
248