1 /* ioapi.c -- IO base function header for compress/uncompress .zip
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2 files using zlib + zip or unzip API
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4 Version 1.01e, February 12th, 2005
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6 Copyright (C) 1998-2005 Gilles Vollant
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18 /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
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32 voidpf ZCALLBACK fopen_file_func OF((
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34 const char* filename,
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37 uLong ZCALLBACK fread_file_func OF((
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43 uLong ZCALLBACK fwrite_file_func OF((
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49 long ZCALLBACK ftell_file_func OF((
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53 long ZCALLBACK fseek_file_func OF((
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59 int ZCALLBACK fclose_file_func OF((
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63 int ZCALLBACK ferror_file_func OF((
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68 voidpf ZCALLBACK fopen_file_func (opaque, filename, mode)
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70 const char* filename;
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74 const char* mode_fopen = NULL;
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75 if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
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78 if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
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81 if (mode & ZLIB_FILEFUNC_MODE_CREATE)
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84 if ((filename!=NULL) && (mode_fopen != NULL))
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85 file = fopen(filename, mode_fopen);
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90 uLong ZCALLBACK fread_file_func (opaque, stream, buf, size)
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97 ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
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102 uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size)
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109 ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
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113 long ZCALLBACK ftell_file_func (opaque, stream)
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118 ret = ftell((FILE *)stream);
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122 long ZCALLBACK fseek_file_func (opaque, stream, offset, origin)
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128 int fseek_origin=0;
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132 case ZLIB_FILEFUNC_SEEK_CUR :
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133 fseek_origin = SEEK_CUR;
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135 case ZLIB_FILEFUNC_SEEK_END :
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136 fseek_origin = SEEK_END;
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138 case ZLIB_FILEFUNC_SEEK_SET :
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139 fseek_origin = SEEK_SET;
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141 default: return -1;
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144 fseek((FILE *)stream, offset, fseek_origin);
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148 int ZCALLBACK fclose_file_func (opaque, stream)
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153 ret = fclose((FILE *)stream);
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157 int ZCALLBACK ferror_file_func (opaque, stream)
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162 ret = ferror((FILE *)stream);
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166 void fill_fopen_filefunc (pzlib_filefunc_def)
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167 zlib_filefunc_def* pzlib_filefunc_def;
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169 pzlib_filefunc_def->zopen_file = fopen_file_func;
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170 pzlib_filefunc_def->zread_file = fread_file_func;
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171 pzlib_filefunc_def->zwrite_file = fwrite_file_func;
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172 pzlib_filefunc_def->ztell_file = ftell_file_func;
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173 pzlib_filefunc_def->zseek_file = fseek_file_func;
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174 pzlib_filefunc_def->zclose_file = fclose_file_func;
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175 pzlib_filefunc_def->zerror_file = ferror_file_func;
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176 pzlib_filefunc_def->opaque = NULL;
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