Function parse_at_file

v2/engine/function.c:2145–2152

 */

static VAR_PARSE * parse_at_file( char const * start, char const * mid,
    char const * end )
{
    VAR_PARSE_FILE * result = var_parse_file_new();
    parse_var_string( start, mid, result->filename );
    parse_var_string( mid + 3, end, result->contents );
    return (VAR_PARSE *)result;
}

/*
 * Given that *s_ points to the character after a "(", parses up to the matching