FreeWRL/FreeX3D  3.0.0
ioapi.c
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))
14  #define _CRT_SECURE_NO_WARNINGS
15 #endif
16 
17 #include "ioapi.h"
18 
19 voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
20 {
21  if (pfilefunc->zfile_func64.zopen64_file != NULL)
22  return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
23  else
24  {
25  return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
26  }
27 }
28 
29 long call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
30 {
31  if (pfilefunc->zfile_func64.zseek64_file != NULL)
32  return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
33  else
34  {
35  uLong offsetTruncated = (uLong)offset;
36  if (offsetTruncated != offset)
37  return -1;
38  else
39  return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
40  }
41 }
42 
43 ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
44 {
45  if (pfilefunc->zfile_func64.zseek64_file != NULL)
46  return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
47  else
48  {
49  uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
50  if ((tell_uLong) == ((uLong)-1))
51  return (ZPOS64_T)-1;
52  else
53  return tell_uLong;
54  }
55 }
56 
57 void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
58 {
59  p_filefunc64_32->zfile_func64.zopen64_file = NULL;
60  p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
61  p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
62  p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
63  p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
64  p_filefunc64_32->zfile_func64.ztell64_file = NULL;
65  p_filefunc64_32->zfile_func64.zseek64_file = NULL;
66  p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
67  p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
68  p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
69  p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
70  p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
71 }
72 
73 
74 
75 static voidpf ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
76 static uLong ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
77 static uLong ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
78 static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
79 static long ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
80 static int ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
81 static int ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
82 
83 static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
84 {
85  FILE* file = NULL;
86  const char* mode_fopen = NULL;
87  if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
88  mode_fopen = "rb";
89  else
90  if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
91  mode_fopen = "r+b";
92  else
93  if (mode & ZLIB_FILEFUNC_MODE_CREATE)
94  mode_fopen = "wb";
95 
96  if ((filename!=NULL) && (mode_fopen != NULL))
97  file = fopen(filename, mode_fopen);
98  return file;
99 }
100 
101 static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
102 {
103  FILE* file = NULL;
104  const char* mode_fopen = NULL;
105  if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
106  mode_fopen = "rb";
107  else
108  if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
109  mode_fopen = "r+b";
110  else
111  if (mode & ZLIB_FILEFUNC_MODE_CREATE)
112  mode_fopen = "wb";
113 
114  if ((filename!=NULL) && (mode_fopen != NULL))
115  file = fopen64((const char*)filename, mode_fopen);
116  return file;
117 }
118 
119 
120 static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
121 {
122  uLong ret;
123  ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
124  return ret;
125 }
126 
127 static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
128 {
129  uLong ret;
130  ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
131  return ret;
132 }
133 
134 static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
135 {
136  long ret;
137  ret = ftell((FILE *)stream);
138  return ret;
139 }
140 
141 
142 static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
143 {
144  ZPOS64_T ret;
145  ret = ftello64((FILE *)stream);
146  return ret;
147 }
148 
149 static long ZCALLBACK fseek_file_func (voidpf opaque, voidpf stream, uLong offset, int origin)
150 {
151  int fseek_origin=0;
152  long ret;
153  switch (origin)
154  {
155  case ZLIB_FILEFUNC_SEEK_CUR :
156  fseek_origin = SEEK_CUR;
157  break;
158  case ZLIB_FILEFUNC_SEEK_END :
159  fseek_origin = SEEK_END;
160  break;
161  case ZLIB_FILEFUNC_SEEK_SET :
162  fseek_origin = SEEK_SET;
163  break;
164  default: return -1;
165  }
166  ret = 0;
167  if (fseek((FILE *)stream, offset, fseek_origin) != 0)
168  ret = -1;
169  return ret;
170 }
171 
172 static long ZCALLBACK fseek64_file_func (voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
173 {
174  int fseek_origin=0;
175  long ret;
176  switch (origin)
177  {
178  case ZLIB_FILEFUNC_SEEK_CUR :
179  fseek_origin = SEEK_CUR;
180  break;
181  case ZLIB_FILEFUNC_SEEK_END :
182  fseek_origin = SEEK_END;
183  break;
184  case ZLIB_FILEFUNC_SEEK_SET :
185  fseek_origin = SEEK_SET;
186  break;
187  default: return -1;
188  }
189  ret = 0;
190 
191  if(fseeko64((FILE *)stream, offset, fseek_origin) != 0)
192  ret = -1;
193 
194  return ret;
195 }
196 
197 
198 static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
199 {
200  int ret;
201  ret = fclose((FILE *)stream);
202  return ret;
203 }
204 
205 static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
206 {
207  int ret;
208  ret = ferror((FILE *)stream);
209  return ret;
210 }
211 
212 void fill_fopen_filefunc (pzlib_filefunc_def)
213  zlib_filefunc_def* pzlib_filefunc_def;
214 {
215  pzlib_filefunc_def->zopen_file = fopen_file_func;
216  pzlib_filefunc_def->zread_file = fread_file_func;
217  pzlib_filefunc_def->zwrite_file = fwrite_file_func;
218  pzlib_filefunc_def->ztell_file = ftell_file_func;
219  pzlib_filefunc_def->zseek_file = fseek_file_func;
220  pzlib_filefunc_def->zclose_file = fclose_file_func;
221  pzlib_filefunc_def->zerror_file = ferror_file_func;
222  pzlib_filefunc_def->opaque = NULL;
223 }
224 
225 void fill_fopen64_filefunc (zlib_filefunc64_def* pzlib_filefunc_def)
226 {
227  pzlib_filefunc_def->zopen64_file = fopen64_file_func;
228  pzlib_filefunc_def->zread_file = fread_file_func;
229  pzlib_filefunc_def->zwrite_file = fwrite_file_func;
230  pzlib_filefunc_def->ztell64_file = ftell64_file_func;
231  pzlib_filefunc_def->zseek64_file = fseek64_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 }
zlib_filefunc_def_s
Definition: ioapi.h:138
zlib_filefunc64_def_s
Definition: ioapi.h:154
zlib_filefunc64_32_def_s
Definition: ioapi.h:170