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
16 voidpf ZCALLBACK fopen_file_func OF((
21 uLong ZCALLBACK fread_file_func OF((
27 uLong ZCALLBACK fwrite_file_func OF((
33 long ZCALLBACK ftell_file_func OF((
37 long ZCALLBACK fseek_file_func OF((
43 int ZCALLBACK fclose_file_func OF((
47 int ZCALLBACK ferror_file_func OF((
52 voidpf ZCALLBACK fopen_file_func (opaque, filename, mode)
58 const char* mode_fopen = NULL;
59 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
62 if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
65 if (mode & ZLIB_FILEFUNC_MODE_CREATE)
68 if ((filename!=NULL) && (mode_fopen != NULL))
69 file = fopen(filename, mode_fopen);
74 uLong ZCALLBACK fread_file_func (opaque, stream, buf, size)
81 ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
86 uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size)
93 ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
97 long ZCALLBACK ftell_file_func (opaque, stream)
102 ret = ftell((FILE *)stream);
106 long ZCALLBACK fseek_file_func (opaque, stream, offset, origin)
116 case ZLIB_FILEFUNC_SEEK_CUR :
117 fseek_origin = SEEK_CUR;
119 case ZLIB_FILEFUNC_SEEK_END :
120 fseek_origin = SEEK_END;
122 case ZLIB_FILEFUNC_SEEK_SET :
123 fseek_origin = SEEK_SET;
128 fseek((FILE *)stream, offset, fseek_origin);
132 int ZCALLBACK fclose_file_func (opaque, stream)
137 ret = fclose((FILE *)stream);
141 int ZCALLBACK ferror_file_func (opaque, stream)
146 ret = ferror((FILE *)stream);
150 void fill_fopen_filefunc (pzlib_filefunc_def)
151 zlib_filefunc_def* pzlib_filefunc_def;
153 pzlib_filefunc_def->zopen_file = fopen_file_func;
154 pzlib_filefunc_def->zread_file = fread_file_func;
155 pzlib_filefunc_def->zwrite_file = fwrite_file_func;
156 pzlib_filefunc_def->ztell_file = ftell_file_func;
157 pzlib_filefunc_def->zseek_file = fseek_file_func;
158 pzlib_filefunc_def->zclose_file = fclose_file_func;
159 pzlib_filefunc_def->zerror_file = ferror_file_func;
160 pzlib_filefunc_def->opaque = NULL;