/*
 * Copyright (c) 1993 Winning Strategies, Inc.
 * All Rights Reserved.
 *
 * 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.
 * 
 * THIS SOFTWARE IS PROVIDED ``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.
 */

#include "DEFS.h"

/*
 * strchr(s, c)
 *	return a pointer to the first occurance of the character c in
 *	string s, or NULL if c does not occur in the string.
 *
 * %edx - pointer iterating through string
 * %eax - pointer to first occurance of 'c'
 * %cl  - character we're comparing against
 * %bl  - character at %edx
 *
 * jtc@wimsey.com (J.T. Conklin, Winning Strategies, Inc.)
 */

ENTRY(strchr)
	pushl	%ebx
	movl	8(%esp),%eax
	movb	12(%esp),%cl
	.align 2,0x90
L1:
	movb	(%eax),%bl
	cmpb	%bl,%cl			/* found char??? */
	je 	L2
	incl	%eax
	testb	%bl,%bl			/* null terminator??? */
	jne	L1
	xorl	%eax,%eax
L2:
	popl	%ebx
	ret