usr/src/stand/lib/sa/strings.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1998, 2003 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"        /* from SVR4.0 1.1 */
  28
  29 #include <stdio.h>
  30 #include <strings.h>
  31
  32 /*
  33  * NOTE: strcasecmp()/strncasecmp() are in $SRC/common/util/string.c.
  34  */
  35
  36 int
  37 bcmp(const void *s1, const void *s2, size_t len)
  38 {
  39         return (memcmp(s1, s2, len) != 0);
  40 }
  41
  42 /*
  43  * NOTE: our memmove() implementation depends on the fact that this bcopy()
  44  * supports overlapping regions.
  45  */
  46 void
  47 bcopy(const void *src, void *dest, size_t count)
  48 {
  49         const char      *csrc   = src;
  50         char            *cdest  = dest;
  51
  52         if (count == 0)
  53                 return;
  54
  55         if (csrc < cdest && (csrc + count) > cdest) {
  56                 /* overlap copy */
  57                 while (count != 0)
  58                         --count, *(cdest + count) = *(csrc + count);
  59         } else {
  60                 while (count != 0)
  61                         --count, *cdest++ = *csrc++;
  62         }
  63 }
  64
  65 void
  66 bzero(void *p, size_t n)
  67 {
  68         char    *cp;
  69
  70         for (cp = p; n != 0; n--)
  71                 *cp++ = 0;
  72 }