Function FileBackpatch

roomedit/source/save.cpp:1028–1036

/ * FileBackpatch: Write "data" to the 4 bytes starting at position "pos" in the file. * This function leaves the file pointer at the same place as when the function was called. */

 *   This function leaves the file pointer at the same place as when the function was called.
 */
void FileBackpatch(FILE *file, int pos, int data)
{
   int cur_pos;

   cur_pos = FileCurPos(file);
   FileGoto(file, pos);
   WriteBytes(file, &data, 4);
   FileGoto(file, cur_pos);
}
/***************************************************************************/
/*
 * BackupFile:  Copy fname to a backup name if it already exists.