/** write to zzip storage also: write(2), zlib(3)
*
* This function will write data to a file descriptor. If the file
* descriptor represents a real file then it will be forwarded to
* call posix => write(2) directly. If it is a descriptor for a
* file within a zip directory then the data will be "deflated"
* using => zlib(3) and appended to the zip archive file.
*/
zzip_ssize_t
zzip_write(ZZIP_FILE * file, const void *ptr, zzip_size_t len)
{
if (zzip_file_real(file))
return write(zzip_realfd(file), ptr, len);
else
return zzip_file_write(file, ptr, len);
}
bool RasterMapCache::Open(const TCHAR* zfilename) {
terrain_valid = false;
if (_tcslen(zfilename)<=0) {
return false;
}
if (!fpTerrain) {
fpTerrain = zzip_fopen(zfilename, "rb");
if (!fpTerrain) {
return false;
}
if (!zzip_file_real(fpTerrain)) {
// don't allow cache mode on files in zip, because way too slow
zzip_fclose(fpTerrain);
fpTerrain = NULL; // was false
return false;
};
}
DWORD dwBytesRead;
dwBytesRead = zzip_fread(&TerrainInfo, 1, sizeof(TERRAIN_INFO),
fpTerrain);
if (dwBytesRead != sizeof(TERRAIN_INFO)) {
Close();
return false;
}
if (!TerrainInfo.StepSize) {
Close();
return false;
}
terrain_valid = true;
ClearTerrainCache();
return terrain_valid;
}
