usr/src/usr.bin/window/value.h

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)value.h     3.7 (Berkeley) %G%
 */

struct value {
        char v_type;
        union {
                int V_num;
                char *V_str;
        } v_un;
};
#define v_num   v_un.V_num
#define v_str   v_un.V_str

#define V_NUM   1
#define V_STR   2
#define V_ERR   3

#define val_free(v)     ((v).v_type == V_STR ? str_free((v).v_str) : 0)