xmemrchr.c

来自「一个C语言写的快速贝叶斯垃圾邮件过滤工具」· C语言 代码 · 共 23 行

/* (C) 2003 by David Relson, redistributable according to the terms
 * of the GNU General Public License, v2.
 *
 * $Id: xmemrchr.c,v 1.3 2006/07/08 15:25:59 m-a Exp $
 *
 */

#include "config.h"
#include <string.h>
#include "xmemrchr.h"

void *xmemrchr(void *v, byte b, size_t len) {
    byte *s = v;
    byte *e = s + len;
    byte *a = NULL;
    while (s < e) {
	if (*s == b)
	    a = s;
	s += 1;
    }
    return a;
}