154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/*
|
|
* Copyright (c) 1983 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 3.13 (Berkeley) 6/6/90";
|
|
#endif /* not lint */
|
|
|
|
#include "string.h"
|
|
|
|
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 string *s;
|
|
|
|
s = (struct string *) malloc((unsigned)l + str_offset);
|
|
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 string *s;
|
|
|
|
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
|