2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Edward Wang at The University of California, Berkeley.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 static char sccsid[] = "@(#)string.c 8.1 (Berkeley) 6/6/93";
41 #include <string.h> /* System string definitions. */
42 #include "string.h" /* Local string definitions. */
53 str = p = str_alloc(strlen(s) + 1);
72 str = p = str_alloc(n + 1);
87 (void) sprintf(buf, "%d", i);
98 str = p = str_alloc(strlen(s1) + strlen(s2) + 1);
101 for (q = s1; *p++ = *q++;)
103 for (q = s2, p--; *p++ = *q++;)
110 * s can be a prefix of p with at least min characters.
113 register char *s, *p;
116 for (; *s && *p && *s == *p; s++, p++, min--)
118 return *s == *p || *s == 0 && min <= 0;
126 register struct string *s;
128 s = (struct string *) malloc((unsigned)l + str_offset);
131 if (str_head.s_forw == 0)
132 str_head.s_forw = str_head.s_back = &str_head;
133 s->s_forw = str_head.s_forw;
134 s->s_back = &str_head;
136 s->s_forw->s_back = s;
143 register struct string *s;
145 for (s = str_head.s_forw; s != &str_head && s->s_data != str;
150 s->s_back->s_forw = s->s_forw;
151 s->s_forw->s_back = s->s_back;