76 lines
2.6 KiB
C
76 lines
2.6 KiB
C
/*
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* Copyright (c) 1996, 1997, 1998 Shigio Yamaguchi. All rights reserved.
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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 Shigio Yamaguchi.
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* 4. Neither the name of the author nor the names of any co-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 AUTHOR 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 AUTHOR 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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* locatestring.c 25-Jul-98
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*
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*/
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#include <string.h>
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#include "locatestring.h"
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/*
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* locatestring: locate pattern from string
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*
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* i) string string
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* i) pattern pattern
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* i) flag MATCH_FIRST: match first
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* MATCH_AT_FIRST: match only at first column
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* MATCH_LAST: match last
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* MATCH_AT_LAST: match only at last column
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* r) pointer or NULL
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*
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* This function is made to avoid compatibility problems.
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*/
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char *
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locatestring(string, pattern, flag)
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const char *string;
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const char *pattern;
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int flag;
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{
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int c = *pattern;
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int slen, plen;
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const char *p = NULL;
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plen = strlen(pattern);
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if (flag == MATCH_AT_LAST && (slen = strlen(string)) > plen)
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string += (slen - plen);
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for (; *string; string++) {
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if (*string == c)
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if (!strncmp(string, pattern, plen)) {
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p = string;
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if (flag == MATCH_FIRST)
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break;
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}
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if (flag == MATCH_AT_FIRST || flag == MATCH_AT_LAST)
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break;
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}
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return (char *)p;
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}
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