XPLM_API char *     XPLMExtractFileAndPath(
                         char *               inFullPath);    

Given a full path to a file, this routine separates the path from the file. If the path is a partial directory (e.g. ends in : or ) the trailing directory separator is removed. This routine works in-place; a pointer to the file part of the buffer is returned; the original buffer still starts with the path and is null terminated with no trailing separator.