text: /* ioapi.h -- IO base function header for compress/uncompress .zip
     part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
  
           Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
  
           Modifications for Zip64 support
           Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
  
           For more info read MiniZip_info.txt
  
  */
  
  #if (defined(_WIN32))
  #define _CRT_SECURE_NO_WARNINGS
  #endif
  
  #include "config.h"
  
  #ifdef HAVE_ZLIB
  
  #include "ioapi.h"
  
  voidpf call_zopen64(const zlib_filefunc64_32_def* pfilefunc, const void* filename, int mode)
  {
      if (pfilefunc->zfile_func64.zopen64_file != NULL)
          return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque, filename, mode);
      else
      {
          return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque, (const char*)filename, mode);
      }
  }
  
  long call_zseek64(const zlib_filefunc64_32_def* pfilefunc, voidpf filestream, ZPOS64_T offset, int origin)
  {
      if (pfilefunc->zfile_func64.zseek64_file != NULL)
          return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque, filestream, offset, origin);
      else
      {
          uLong offsetTruncated = (uLong)offset;
          if (offsetTruncated != offset)
              return -1;
          else
              return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque, filestream, offsetTruncated, origin);
      }
  }
  
  ZPOS64_T call_ztell64(const zlib_filefunc64_32_def* pfilefunc, voidpf filestream)
  {
      if (pfilefunc->zfile_func64.zseek64_file != NULL)
          return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque, filestream);
      else
      {
          uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque, filestream);
          if ((tell_uLong) == ((uLong)-1))
              return (ZPOS64_T)-1;
          else
              return tell_uLong;
      }
  }
  
  void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32, const zlib_filefunc_def* p_filefunc32)
  {
      p_filefunc64_32->zfile_func64.zopen64_file = NULL;
      p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
      p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
      p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
      p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
      p_filefunc64_32->zfile_func64.ztell64_file = NULL;
      p_filefunc64_32->zfile_func64.zseek64_file = NULL;
      p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
      p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
      p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
      p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
      p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
  }
  
  
  
  static voidpf  ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
  static uLong   ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
  static uLong   ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf, uLong size));
  static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
  static long    ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
  static int     ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
  static int     ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
  
  static voidpf ZCALLBACK fopen_file_func(voidpf opaque, const char* filename, int mode)
  {
      FILE* file = NULL;
      const char* mode_fopen = NULL;
      if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
          mode_fopen = "rb";
      else
          if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
              mode_fopen = "r+b";
          else
              if (mode & ZLIB_FILEFUNC_MODE_CREATE)
                  mode_fopen = "wb";
  
      if ((filename != NULL) && (mode_fopen != NULL))
          file = fopen(filename, mode_fopen);
      return file;
  }
  
  static voidpf ZCALLBACK fopen64_file_func(voidpf opaque, const void* filename, int mode)
  {
      FILE* file = NULL;
      const char* mode_fopen = NULL;
      if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
          mode_fopen = "rb";
      else
          if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
              mode_fopen = "r+b";
          else
              if (mode & ZLIB_FILEFUNC_MODE_CREATE)
                  mode_fopen = "wb";
  
      if ((filename != NULL) && (mode_fopen != NULL))
          file = fopen64((const char*)filename, mode_fopen);
      return file;
  }
  
  
  static uLong ZCALLBACK fread_file_func(voidpf opaque, voidpf stream, void* buf, uLong size)
  {
      uLong ret;
      ret = (uLong)fread(buf, 1, (size_t)size, (FILE*)stream);
      return ret;
  }
  
  static uLong ZCALLBACK fwrite_file_func(voidpf opaque, voidpf stream, const void* buf, uLong size)
  {
      uLong ret;
      ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE*)stream);
      return ret;
  }
  
  static long ZCALLBACK ftell_file_func(voidpf opaque, voidpf stream)
  {
      long ret;
      ret = ftell((FILE*)stream);
      return ret;
  }
  
  
  static ZPOS64_T ZCALLBACK ftell64_file_func(voidpf opaque, voidpf stream)
  {
      ZPOS64_T ret;
      ret = ftello64((FILE*)stream);
      return ret;
  }
  
  static long ZCALLBACK fseek_file_func(voidpf  opaque, voidpf stream, uLong offset, int origin)
  {
      int fseek_origin = 0;
      long ret;
      switch (origin)
      {
      case ZLIB_FILEFUNC_SEEK_CUR:
          fseek_origin = SEEK_CUR;
          break;
      case ZLIB_FILEFUNC_SEEK_END:
          fseek_origin = SEEK_END;
          break;
      case ZLIB_FILEFUNC_SEEK_SET:
          fseek_origin = SEEK_SET;
          break;
      default: return -1;
      }
      ret = 0;
      if (fseek((FILE*)stream, offset, fseek_origin) != 0)
          ret = -1;
      return ret;
  }
  
  static long ZCALLBACK fseek64_file_func(voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
  {
      int fseek_origin = 0;
      long ret;
      switch (origin)
      {
      case ZLIB_FILEFUNC_SEEK_CUR:
          fseek_origin = SEEK_CUR;
          break;
      case ZLIB_FILEFUNC_SEEK_END:
          fseek_origin = SEEK_END;
          break;
      case ZLIB_FILEFUNC_SEEK_SET:
          fseek_origin = SEEK_SET;
          break;
      default: return -1;
      }
      ret = 0;
  
      if (fseeko64((FILE*)stream, offset, fseek_origin) != 0)
          ret = -1;
  
      return ret;
  }
  
  
  static int ZCALLBACK fclose_file_func(voidpf opaque, voidpf stream)
  {
      int ret;
      ret = fclose((FILE*)stream);
      return ret;
  }
  
  static int ZCALLBACK ferror_file_func(voidpf opaque, voidpf stream)
  {
      int ret;
      ret = ferror((FILE*)stream);
      return ret;
  }
  
  void fill_fopen_filefunc(zlib_filefunc_def* pzlib_filefunc_def)
  {
      pzlib_filefunc_def->zopen_file = fopen_file_func;
      pzlib_filefunc_def->zread_file = fread_file_func;
      pzlib_filefunc_def->zwrite_file = fwrite_file_func;
      pzlib_filefunc_def->ztell_file = ftell_file_func;
      pzlib_filefunc_def->zseek_file = fseek_file_func;
      pzlib_filefunc_def->zclose_file = fclose_file_func;
      pzlib_filefunc_def->zerror_file = ferror_file_func;
      pzlib_filefunc_def->opaque = NULL;
  }
  
  void fill_fopen64_filefunc(zlib_filefunc64_def* pzlib_filefunc_def)
  {
      pzlib_filefunc_def->zopen64_file = fopen64_file_func;
      pzlib_filefunc_def->zread_file = fread_file_func;
      pzlib_filefunc_def->zwrite_file = fwrite_file_func;
      pzlib_filefunc_def->ztell64_file = ftell64_file_func;
      pzlib_filefunc_def->zseek64_file = fseek64_file_func;
      pzlib_filefunc_def->zclose_file = fclose_file_func;
      pzlib_filefunc_def->zerror_file = ferror_file_func;
      pzlib_filefunc_def->opaque = NULL;
  }
  
  #endif // HAVE_ZLIB
  