cannam@89: /* ioapi.h -- IO base function header for compress/uncompress .zip
cannam@89:    part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
cannam@89: 
cannam@89:          Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
cannam@89: 
cannam@89:          Modifications for Zip64 support
cannam@89:          Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
cannam@89: 
cannam@89:          For more info read MiniZip_info.txt
cannam@89: 
cannam@89: */
cannam@89: 
cannam@89: #if defined(_WIN32) && (!(defined(_CRT_SECURE_NO_WARNINGS)))
cannam@89:         #define _CRT_SECURE_NO_WARNINGS
cannam@89: #endif
cannam@89: 
cannam@89: #if defined(__APPLE__) || defined(IOAPI_NO_64)
cannam@89: // In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
cannam@89: #define FOPEN_FUNC(filename, mode) fopen(filename, mode)
cannam@89: #define FTELLO_FUNC(stream) ftello(stream)
cannam@89: #define FSEEKO_FUNC(stream, offset, origin) fseeko(stream, offset, origin)
cannam@89: #else
cannam@89: #define FOPEN_FUNC(filename, mode) fopen64(filename, mode)
cannam@89: #define FTELLO_FUNC(stream) ftello64(stream)
cannam@89: #define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
cannam@89: #endif
cannam@89: 
cannam@89: 
cannam@89: #include "ioapi.h"
cannam@89: 
cannam@89: voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
cannam@89: {
cannam@89:     if (pfilefunc->zfile_func64.zopen64_file != NULL)
cannam@89:         return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
cannam@89:     else
cannam@89:     {
cannam@89:         return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
cannam@89:     }
cannam@89: }
cannam@89: 
cannam@89: long call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
cannam@89: {
cannam@89:     if (pfilefunc->zfile_func64.zseek64_file != NULL)
cannam@89:         return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
cannam@89:     else
cannam@89:     {
cannam@89:         uLong offsetTruncated = (uLong)offset;
cannam@89:         if (offsetTruncated != offset)
cannam@89:             return -1;
cannam@89:         else
cannam@89:             return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
cannam@89:     }
cannam@89: }
cannam@89: 
cannam@89: ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
cannam@89: {
cannam@89:     if (pfilefunc->zfile_func64.zseek64_file != NULL)
cannam@89:         return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
cannam@89:     else
cannam@89:     {
cannam@89:         uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
cannam@89:         if ((tell_uLong) == MAXU32)
cannam@89:             return (ZPOS64_T)-1;
cannam@89:         else
cannam@89:             return tell_uLong;
cannam@89:     }
cannam@89: }
cannam@89: 
cannam@89: void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
cannam@89: {
cannam@89:     p_filefunc64_32->zfile_func64.zopen64_file = NULL;
cannam@89:     p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
cannam@89:     p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
cannam@89:     p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
cannam@89:     p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
cannam@89:     p_filefunc64_32->zfile_func64.ztell64_file = NULL;
cannam@89:     p_filefunc64_32->zfile_func64.zseek64_file = NULL;
cannam@89:     p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
cannam@89:     p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
cannam@89:     p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
cannam@89:     p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
cannam@89:     p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
cannam@89: }
cannam@89: 
cannam@89: 
cannam@89: 
cannam@89: static voidpf  ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
cannam@89: static uLong   ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
cannam@89: static uLong   ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
cannam@89: static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
cannam@89: static long    ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
cannam@89: static int     ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
cannam@89: static int     ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
cannam@89: 
cannam@89: static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
cannam@89: {
cannam@89:     FILE* file = NULL;
cannam@89:     const char* mode_fopen = NULL;
cannam@89:     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
cannam@89:         mode_fopen = "rb";
cannam@89:     else
cannam@89:     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
cannam@89:         mode_fopen = "r+b";
cannam@89:     else
cannam@89:     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
cannam@89:         mode_fopen = "wb";
cannam@89: 
cannam@89:     if ((filename!=NULL) && (mode_fopen != NULL))
cannam@89:         file = fopen(filename, mode_fopen);
cannam@89:     return file;
cannam@89: }
cannam@89: 
cannam@89: static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
cannam@89: {
cannam@89:     FILE* file = NULL;
cannam@89:     const char* mode_fopen = NULL;
cannam@89:     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
cannam@89:         mode_fopen = "rb";
cannam@89:     else
cannam@89:     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
cannam@89:         mode_fopen = "r+b";
cannam@89:     else
cannam@89:     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
cannam@89:         mode_fopen = "wb";
cannam@89: 
cannam@89:     if ((filename!=NULL) && (mode_fopen != NULL))
cannam@89:         file = FOPEN_FUNC((const char*)filename, mode_fopen);
cannam@89:     return file;
cannam@89: }
cannam@89: 
cannam@89: 
cannam@89: static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
cannam@89: {
cannam@89:     uLong ret;
cannam@89:     ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
cannam@89: {
cannam@89:     uLong ret;
cannam@89:     ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
cannam@89: {
cannam@89:     long ret;
cannam@89:     ret = ftell((FILE *)stream);
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: 
cannam@89: static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
cannam@89: {
cannam@89:     ZPOS64_T ret;
cannam@89:     ret = FTELLO_FUNC((FILE *)stream);
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offset, int origin)
cannam@89: {
cannam@89:     int fseek_origin=0;
cannam@89:     long ret;
cannam@89:     switch (origin)
cannam@89:     {
cannam@89:     case ZLIB_FILEFUNC_SEEK_CUR :
cannam@89:         fseek_origin = SEEK_CUR;
cannam@89:         break;
cannam@89:     case ZLIB_FILEFUNC_SEEK_END :
cannam@89:         fseek_origin = SEEK_END;
cannam@89:         break;
cannam@89:     case ZLIB_FILEFUNC_SEEK_SET :
cannam@89:         fseek_origin = SEEK_SET;
cannam@89:         break;
cannam@89:     default: return -1;
cannam@89:     }
cannam@89:     ret = 0;
cannam@89:     if (fseek((FILE *)stream, offset, fseek_origin) != 0)
cannam@89:         ret = -1;
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
cannam@89: {
cannam@89:     int fseek_origin=0;
cannam@89:     long ret;
cannam@89:     switch (origin)
cannam@89:     {
cannam@89:     case ZLIB_FILEFUNC_SEEK_CUR :
cannam@89:         fseek_origin = SEEK_CUR;
cannam@89:         break;
cannam@89:     case ZLIB_FILEFUNC_SEEK_END :
cannam@89:         fseek_origin = SEEK_END;
cannam@89:         break;
cannam@89:     case ZLIB_FILEFUNC_SEEK_SET :
cannam@89:         fseek_origin = SEEK_SET;
cannam@89:         break;
cannam@89:     default: return -1;
cannam@89:     }
cannam@89:     ret = 0;
cannam@89: 
cannam@89:     if(FSEEKO_FUNC((FILE *)stream, offset, fseek_origin) != 0)
cannam@89:                         ret = -1;
cannam@89: 
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: 
cannam@89: static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
cannam@89: {
cannam@89:     int ret;
cannam@89:     ret = fclose((FILE *)stream);
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
cannam@89: {
cannam@89:     int ret;
cannam@89:     ret = ferror((FILE *)stream);
cannam@89:     return ret;
cannam@89: }
cannam@89: 
cannam@89: void fill_fopen_filefunc (pzlib_filefunc_def)
cannam@89:   zlib_filefunc_def* pzlib_filefunc_def;
cannam@89: {
cannam@89:     pzlib_filefunc_def->zopen_file = fopen_file_func;
cannam@89:     pzlib_filefunc_def->zread_file = fread_file_func;
cannam@89:     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
cannam@89:     pzlib_filefunc_def->ztell_file = ftell_file_func;
cannam@89:     pzlib_filefunc_def->zseek_file = fseek_file_func;
cannam@89:     pzlib_filefunc_def->zclose_file = fclose_file_func;
cannam@89:     pzlib_filefunc_def->zerror_file = ferror_file_func;
cannam@89:     pzlib_filefunc_def->opaque = NULL;
cannam@89: }
cannam@89: 
cannam@89: void fill_fopen64_filefunc (zlib_filefunc64_def*  pzlib_filefunc_def)
cannam@89: {
cannam@89:     pzlib_filefunc_def->zopen64_file = fopen64_file_func;
cannam@89:     pzlib_filefunc_def->zread_file = fread_file_func;
cannam@89:     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
cannam@89:     pzlib_filefunc_def->ztell64_file = ftell64_file_func;
cannam@89:     pzlib_filefunc_def->zseek64_file = fseek64_file_func;
cannam@89:     pzlib_filefunc_def->zclose_file = fclose_file_func;
cannam@89:     pzlib_filefunc_def->zerror_file = ferror_file_func;
cannam@89:     pzlib_filefunc_def->opaque = NULL;
cannam@89: }