[deliverable/binutils-gdb.git] / gas / strstr.c

/* strstr - find first occurrence of wanted in s
   Copyright (C) 1989, 1990, 1991 Free Software Foundation.
   
   This file is part of GAS, the GNU Assembler.
   
   GAS is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
   
   GAS is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with GAS; see the file COPYING.  If not, write to
   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* If your compiler is really ansi, then you don't need this. */
#ifndef __STDC__

#define SIZET int

#define	NULL	0

#include <string.h>

char *				/* found string, or NULL if none */
    strstr(s, wanted)
char *s;
char *wanted;
{
	register char *scan;
	register SIZET len;
	register char firstc;
	
	/*
	 * The odd placement of the two tests is so "" is findable.
	 * Also, we inline the first char for speed.
	 * The ++ on scan has been moved down for optimization.
	 */
	firstc = *wanted;
	len = strlen(wanted);
	for (scan = s; *scan != firstc || strncmp(scan, wanted, len) != 0; )
	    if (*scan++ == '\0')
		return(NULL);
	return(scan);
} /* strstr() */

#endif /* __STDC__ */

/* end of strstr.c */
Commit	Line	Data
fecd2382 RP	1	/* strstr - find first occurrence of wanted in s
fecd2382 RP	2	Copyright (C) 1989, 1990, 1991 Free Software Foundation.
a39116f1 RP	3
	4	This file is part of GAS, the GNU Assembler.
	5
	6	GAS is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2, or (at your option)
	9	any later version.
	10
	11	GAS is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with GAS; see the file COPYING. If not, write to
	18	the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
	19
	20	/* If your compiler is really ansi, then you don't need this. */
fecd2382 RP	21	#ifndef __STDC__
	22
	23	#define SIZET int
	24
	25	#define NULL 0
	26
	27	#include <string.h>
	28
	29	char * /* found string, or NULL if none */
a39116f1	30	strstr(s, wanted)
fecd2382 RP	31	char *s;
	32	char *wanted;
	33	{
	34	register char *scan;
	35	register SIZET len;
	36	register char firstc;
a39116f1	37
fecd2382 RP	38	/*
	39	* The odd placement of the two tests is so "" is findable.
	40	* Also, we inline the first char for speed.
	41	* The ++ on scan has been moved down for optimization.
	42	*/
	43	firstc = *wanted;
	44	len = strlen(wanted);
	45	for (scan = s; *scan != firstc \|\| strncmp(scan, wanted, len) != 0; )
a39116f1 RP	46	if (*scan++ == '\0')
a39116f1 RP	47	return(NULL);
fecd2382 RP	48	return(scan);
	49	} /* strstr() */
	50
	51	#endif /* __STDC__ */
	52
	53	/* end of strstr.c */