~drizzle-trunk/drizzle/development

/* Copyright (C) 2000 MySQL AB

   This program 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; version 2 of the License.

   This program 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 this program; if not, write to the Free Software

   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

/* memcmp(lhs, rhs, len)

   compares the two memory areas lhs[0..len-1]	??  rhs[0..len-1].   It

   returns  an integer less than, equal to, or greater than 0 according

   as lhs[-] is lexicographically less than, equal to, or greater  than

   rhs[-].  Note  that this is not at all the same as bcmp, which tells

   you *where* the difference is but not what.

   Note:  suppose we have int x, y;  then memcmp(&x, &y, sizeof x) need

   not bear any relation to x-y.  This is because byte order is machine

   dependent, and also, some machines have integer representations that

   are shorter than a machine word and two equal  integers  might  have

   different  values  in the spare bits.  On a ones complement machine,

   -0 == 0, but the bit patterns are different.

*/

#include "strings.h"

#if !defined(HAVE_MEMCPY)

int memcmp(lhs, rhs, len)

     register char *lhs, *rhs;

     register int len;

{

  while (--len >= 0)

    if (*lhs++ != *rhs++) return (uchar) lhs[-1] - (uchar) rhs[-1];

  return 0;

}

#endif