freebsd-dev/usr.bin/window/string.c

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/*
* 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.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
static char sccsid[] = "@(#)string.c 8.1 (Berkeley) 6/6/93";
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static char rcsid[] =
"$FreeBSD$";
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#endif /* not lint */
#include <string.h> /* System string definitions. */
#include "mystring.h" /* Local string definitions. */
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char *malloc();
char *
str_cpy(s)
register char *s;
{
char *str;
register char *p;
str = p = str_alloc(strlen(s) + 1);
if (p == 0)
return 0;
while (*p++ = *s++)
;
return str;
}
char *
str_ncpy(s, n)
register char *s;
register n;
{
int l = strlen(s);
char *str;
register char *p;
if (n > l)
n = l;
str = p = str_alloc(n + 1);
if (p == 0)
return 0;
while (--n >= 0)
*p++ = *s++;
*p = 0;
return str;
}
char *
str_itoa(i)
int i;
{
char buf[30];
(void) sprintf(buf, "%d", i);
return str_cpy(buf);
}
char *
str_cat(s1, s2)
char *s1, *s2;
{
char *str;
register char *p, *q;
str = p = str_alloc(strlen(s1) + strlen(s2) + 1);
if (p == 0)
return 0;
for (q = s1; *p++ = *q++;)
;
for (q = s2, p--; *p++ = *q++;)
;
return str;
}
/*
* match s against p.
* s can be a prefix of p with at least min characters.
*/
str_match(s, p, min)
register char *s, *p;
register min;
{
for (; *s && *p && *s == *p; s++, p++, min--)
;
return *s == *p || *s == 0 && min <= 0;
}
#ifdef STR_DEBUG
char *
str_alloc(l)
int l;
{
register struct mystring *s;
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s = (struct mystring *) malloc((unsigned)l + str_offset);
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if (s == 0)
return 0;
if (str_head.s_forw == 0)
str_head.s_forw = str_head.s_back = &str_head;
s->s_forw = str_head.s_forw;
s->s_back = &str_head;
str_head.s_forw = s;
s->s_forw->s_back = s;
return s->s_data;
}
str_free(str)
char *str;
{
register struct mystring *s;
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for (s = str_head.s_forw; s != &str_head && s->s_data != str;
s = s->s_forw)
;
if (s == &str_head)
abort();
s->s_back->s_forw = s->s_forw;
s->s_forw->s_back = s->s_back;
free((char *)s);
}
#endif