154 lines
3.6 KiB
C
154 lines
3.6 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Edward Wang at The University of California, Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)string.c 8.1 (Berkeley) 6/6/93";
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#endif /* not lint */
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#include "string.h"
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char *malloc();
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char *
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str_cpy(s)
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register char *s;
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{
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char *str;
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register char *p;
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str = p = str_alloc(strlen(s) + 1);
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if (p == 0)
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return 0;
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while (*p++ = *s++)
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;
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return str;
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}
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char *
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str_ncpy(s, n)
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register char *s;
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register n;
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{
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int l = strlen(s);
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char *str;
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register char *p;
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if (n > l)
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n = l;
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str = p = str_alloc(n + 1);
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if (p == 0)
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return 0;
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while (--n >= 0)
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*p++ = *s++;
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*p = 0;
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return str;
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}
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char *
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str_itoa(i)
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int i;
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{
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char buf[30];
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(void) sprintf(buf, "%d", i);
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return str_cpy(buf);
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}
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char *
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str_cat(s1, s2)
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char *s1, *s2;
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{
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char *str;
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register char *p, *q;
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str = p = str_alloc(strlen(s1) + strlen(s2) + 1);
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if (p == 0)
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return 0;
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for (q = s1; *p++ = *q++;)
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;
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for (q = s2, p--; *p++ = *q++;)
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;
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return str;
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}
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/*
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* match s against p.
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* s can be a prefix of p with at least min characters.
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*/
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str_match(s, p, min)
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register char *s, *p;
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register min;
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{
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for (; *s && *p && *s == *p; s++, p++, min--)
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;
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return *s == *p || *s == 0 && min <= 0;
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}
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#ifdef STR_DEBUG
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char *
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str_alloc(l)
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int l;
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{
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register struct string *s;
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s = (struct string *) malloc((unsigned)l + str_offset);
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if (s == 0)
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return 0;
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if (str_head.s_forw == 0)
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str_head.s_forw = str_head.s_back = &str_head;
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s->s_forw = str_head.s_forw;
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s->s_back = &str_head;
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str_head.s_forw = s;
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s->s_forw->s_back = s;
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return s->s_data;
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}
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str_free(str)
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char *str;
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{
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register struct string *s;
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for (s = str_head.s_forw; s != &str_head && s->s_data != str;
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s = s->s_forw)
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;
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if (s == &str_head)
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abort();
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s->s_back->s_forw = s->s_forw;
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s->s_forw->s_back = s->s_back;
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free((char *)s);
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}
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#endif
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