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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) || defined(__HAIKU__) || defined(MINIZIP_FOPEN_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 
     31 voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc, const void*filename, int mode) {
     32     if (pfilefunc->zfile_func64.zopen64_file != NULL)
     33         return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
     34     else
     35     {
     36         return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
     37     }
     38 }
     39 
     40 long call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin) {
     41     if (pfilefunc->zfile_func64.zseek64_file != NULL)
     42         return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
     43     else
     44     {
     45         uLong offsetTruncated = (uLong)offset;
     46         if (offsetTruncated != offset)
     47             return -1;
     48         else
     49             return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
     50     }
     51 }
     52 
     53 ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc, voidpf filestream) {
     54     if (pfilefunc->zfile_func64.zseek64_file != NULL)
     55         return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
     56     else
     57     {
     58         uLong tell_uLong = (uLong)(*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
     59         if ((tell_uLong) == MAXU32)
     60             return (ZPOS64_T)-1;
     61         else
     62             return tell_uLong;
     63     }
     64 }
     65 
     66 void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32, const zlib_filefunc_def* p_filefunc32) {
     67     p_filefunc64_32->zfile_func64.zopen64_file = NULL;
     68     p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
     69     p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
     70     p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
     71     p_filefunc64_32->zfile_func64.ztell64_file = NULL;
     72     p_filefunc64_32->zfile_func64.zseek64_file = NULL;
     73     p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
     74     p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
     75     p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
     76     p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
     77     p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
     78 }
     79 
     80 
     81 
     82 static voidpf ZCALLBACK fopen_file_func(voidpf opaque, const char* filename, int mode) {
     83     FILE* file = NULL;
     84     const char* mode_fopen = NULL;
     85     (void)opaque;
     86     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
     87         mode_fopen = "rb";
     88     else
     89     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
     90         mode_fopen = "r+b";
     91     else
     92     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
     93         mode_fopen = "wb";
     94 
     95     if ((filename!=NULL) && (mode_fopen != NULL))
     96         file = fopen(filename, mode_fopen);
     97     return file;
     98 }
     99 
    100 static voidpf ZCALLBACK fopen64_file_func(voidpf opaque, const void* filename, int mode) {
    101     FILE* file = NULL;
    102     const char* mode_fopen = NULL;
    103     (void)opaque;
    104     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
    105         mode_fopen = "rb";
    106     else
    107     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
    108         mode_fopen = "r+b";
    109     else
    110     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
    111         mode_fopen = "wb";
    112 
    113     if ((filename!=NULL) && (mode_fopen != NULL))
    114         file = FOPEN_FUNC((const char*)filename, mode_fopen);
    115     return file;
    116 }
    117 
    118 
    119 static uLong ZCALLBACK fread_file_func(voidpf opaque, voidpf stream, void* buf, uLong size) {
    120     uLong ret;
    121     (void)opaque;
    122     ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
    123     return ret;
    124 }
    125 
    126 static uLong ZCALLBACK fwrite_file_func(voidpf opaque, voidpf stream, const void* buf, uLong size) {
    127     uLong ret;
    128     (void)opaque;
    129     ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
    130     return ret;
    131 }
    132 
    133 static long ZCALLBACK ftell_file_func(voidpf opaque, voidpf stream) {
    134     long ret;
    135     (void)opaque;
    136     ret = ftell((FILE *)stream);
    137     return ret;
    138 }
    139 
    140 
    141 static ZPOS64_T ZCALLBACK ftell64_file_func(voidpf opaque, voidpf stream) {
    142     ZPOS64_T ret;
    143     (void)opaque;
    144     ret = (ZPOS64_T)FTELLO_FUNC((FILE *)stream);
    145     return ret;
    146 }
    147 
    148 static long ZCALLBACK fseek_file_func(voidpf opaque, voidpf stream, uLong offset, int origin) {
    149     int fseek_origin=0;
    150     long ret;
    151     (void)opaque;
    152     switch (origin)
    153     {
    154     case ZLIB_FILEFUNC_SEEK_CUR :
    155         fseek_origin = SEEK_CUR;
    156         break;
    157     case ZLIB_FILEFUNC_SEEK_END :
    158         fseek_origin = SEEK_END;
    159         break;
    160     case ZLIB_FILEFUNC_SEEK_SET :
    161         fseek_origin = SEEK_SET;
    162         break;
    163     default: return -1;
    164     }
    165     ret = 0;
    166     if (fseek((FILE *)stream, (long)offset, fseek_origin) != 0)
    167         ret = -1;
    168     return ret;
    169 }
    170 
    171 static long ZCALLBACK fseek64_file_func(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin) {
    172     int fseek_origin=0;
    173     long ret;
    174     (void)opaque;
    175     switch (origin)
    176     {
    177     case ZLIB_FILEFUNC_SEEK_CUR :
    178         fseek_origin = SEEK_CUR;
    179         break;
    180     case ZLIB_FILEFUNC_SEEK_END :
    181         fseek_origin = SEEK_END;
    182         break;
    183     case ZLIB_FILEFUNC_SEEK_SET :
    184         fseek_origin = SEEK_SET;
    185         break;
    186     default: return -1;
    187     }
    188     ret = 0;
    189 
    190     if(FSEEKO_FUNC((FILE *)stream, (z_off64_t)offset, fseek_origin) != 0)
    191                         ret = -1;
    192 
    193     return ret;
    194 }
    195 
    196 
    197 static int ZCALLBACK fclose_file_func(voidpf opaque, voidpf stream) {
    198     int ret;
    199     (void)opaque;
    200     ret = fclose((FILE *)stream);
    201     return ret;
    202 }
    203 
    204 static int ZCALLBACK ferror_file_func(voidpf opaque, voidpf stream) {
    205     int ret;
    206     (void)opaque;
    207     ret = ferror((FILE *)stream);
    208     return ret;
    209 }
    210 
    211 void fill_fopen_filefunc(zlib_filefunc_def* pzlib_filefunc_def) {
    212     pzlib_filefunc_def->zopen_file = fopen_file_func;
    213     pzlib_filefunc_def->zread_file = fread_file_func;
    214     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
    215     pzlib_filefunc_def->ztell_file = ftell_file_func;
    216     pzlib_filefunc_def->zseek_file = fseek_file_func;
    217     pzlib_filefunc_def->zclose_file = fclose_file_func;
    218     pzlib_filefunc_def->zerror_file = ferror_file_func;
    219     pzlib_filefunc_def->opaque = NULL;
    220 }
    221 
    222 void fill_fopen64_filefunc(zlib_filefunc64_def* pzlib_filefunc_def) {
    223     pzlib_filefunc_def->zopen64_file = fopen64_file_func;
    224     pzlib_filefunc_def->zread_file = fread_file_func;
    225     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
    226     pzlib_filefunc_def->ztell64_file = ftell64_file_func;
    227     pzlib_filefunc_def->zseek64_file = fseek64_file_func;
    228     pzlib_filefunc_def->zclose_file = fclose_file_func;
    229     pzlib_filefunc_def->zerror_file = ferror_file_func;
    230     pzlib_filefunc_def->opaque = NULL;
    231 }
    232