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56 lines
1.5 KiB
C
56 lines
1.5 KiB
C
/* strstr - find first occurrence of wanted in s
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Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* If your compiler is really ansi, then you don't need this. */
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#ifndef __STDC__
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#define SIZET int
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#define NULL 0
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#include <string.h>
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char * /* found string, or NULL if none */
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strstr(s, wanted)
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char *s;
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char *wanted;
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{
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register char *scan;
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register SIZET len;
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register char firstc;
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/*
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* The odd placement of the two tests is so "" is findable.
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* Also, we inline the first char for speed.
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* The ++ on scan has been moved down for optimization.
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*/
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firstc = *wanted;
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len = strlen(wanted);
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for (scan = s; *scan != firstc || strncmp(scan, wanted, len) != 0; )
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if (*scan++ == '\0')
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return(NULL);
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return(scan);
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} /* strstr() */
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#endif /* __STDC__ */
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/* end of strstr.c */
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