usr/src/usr.bin/window/string.h

/*
 * Copyright (c) 1983, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Edward Wang at The University of California, Berkeley.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)string.h    8.1 (Berkeley) %G%
 */

#define STR_DEBUG

char *str_cpy();
char *str_ncpy();
char *str_cat();
char *str_itoa();

#define str_cmp(a, b)   strcmp(a, b)

#ifdef STR_DEBUG
struct string {
        struct string *s_forw;
        struct string *s_back;
        char s_data[1];
};

struct string str_head;

#define str_offset ((unsigned)str_head.s_data - (unsigned)&str_head)
#define str_stos(s) ((struct string *)((unsigned)(s) - str_offset))

char *str_alloc();
int str_free();
#else
#define str_free(s)     free(s)
#define str_alloc(s)    malloc(s)
#endif