1 /* ioapi.c -- IO base function header for compress/uncompress .zip
2 files using zlib + zip or unzip API
4 Version 1.01e, February 12th, 2005
6 Copyright (C) 1998-2005 Gilles Vollant
18 /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
32 voidpf ZCALLBACK fopen_file_func OF((
37 uLong ZCALLBACK fread_file_func OF((
43 uLong ZCALLBACK fwrite_file_func OF((
49 long ZCALLBACK ftell_file_func OF((
53 long ZCALLBACK fseek_file_func OF((
59 int ZCALLBACK fclose_file_func OF((
63 int ZCALLBACK ferror_file_func OF((
68 voidpf ZCALLBACK fopen_file_func (opaque, filename, mode)
75 const char* mode_fopen = NULL;
76 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
79 if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
82 if (mode & ZLIB_FILEFUNC_MODE_CREATE)
85 if ((filename!=NULL) && (mode_fopen != NULL))
86 file = fopen(filename, mode_fopen);
91 uLong ZCALLBACK fread_file_func (opaque, stream, buf, size)
99 ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
104 uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size)
112 ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
116 long ZCALLBACK ftell_file_func (opaque, stream)
122 ret = ftell((FILE *)stream);
126 long ZCALLBACK fseek_file_func (opaque, stream, offset, origin)
137 case ZLIB_FILEFUNC_SEEK_CUR :
138 fseek_origin = SEEK_CUR;
140 case ZLIB_FILEFUNC_SEEK_END :
141 fseek_origin = SEEK_END;
143 case ZLIB_FILEFUNC_SEEK_SET :
144 fseek_origin = SEEK_SET;
149 fseek((FILE *)stream, offset, fseek_origin);
153 int ZCALLBACK fclose_file_func (opaque, stream)
159 ret = fclose((FILE *)stream);
163 int ZCALLBACK ferror_file_func (opaque, stream)
169 ret = ferror((FILE *)stream);
173 void fill_fopen_filefunc (pzlib_filefunc_def)
174 zlib_filefunc_def* pzlib_filefunc_def;
176 pzlib_filefunc_def->zopen_file = fopen_file_func;
177 pzlib_filefunc_def->zread_file = fread_file_func;
178 pzlib_filefunc_def->zwrite_file = fwrite_file_func;
179 pzlib_filefunc_def->ztell_file = ftell_file_func;
180 pzlib_filefunc_def->zseek_file = fseek_file_func;
181 pzlib_filefunc_def->zclose_file = fclose_file_func;
182 pzlib_filefunc_def->zerror_file = ferror_file_func;
183 pzlib_filefunc_def->opaque = NULL;