~drizzle-trunk/drizzle/development

/* Copyright (C) 2002 MySQL AB

   This library is free software; you can redistribute it and/or

   modify it under the terms of the GNU Library General Public

   License as published by the Free Software Foundation; version 2

   of the License.

   This library 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

   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public

   License along with this library; if not, write to the Free

   Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,

   MA 02111-1307, USA */

/*  File   : bmove.c

    Author : Richard A. O'Keefe.

	     Michael Widenius;	ifdef MC68000

    Updated: 23 April 1984

    Defines: bmove()

    bmove(dst, src, len) moves exactly "len" bytes from the source "src"

    to the destination "dst".  It does not check for NUL characters as

    strncpy() and strnmov() do.  Thus if your C compiler doesn't support

    structure assignment, you can simulate it with

    bmove(&to, &from, sizeof from);

    The standard 4.2bsd routine for this purpose is bcopy.  But as bcopy

    has its first two arguments the other way around you may find this a

    bit easier to get right.

    No value is returned.

    Note: the "b" routines are there to exploit certain VAX order codes,

    but the MOVC3 instruction will only move 65535 characters.	 The asm

    code is presented for your interest and amusement.

*/

#include <my_global.h>

#include "m_string.h"

#if !defined(HAVE_BMOVE) && !defined(bmove)

#if VaxAsm

void bmove(dst, src, len)

    char *dst, *src;

    uint len;

    {

 asm("movc3 12(ap),*8(ap),*4(ap)");

    }

#else

#if defined(MC68000) && defined(DS90)

void bmove(dst, src, len)

char *dst,*src;

uint len;				/* 0 <= len <= 65535 */

{

asm("		movl	12(a7),d0	");

asm("		subql	#1,d0		");

asm("		blt	.L5		");

asm("		movl	4(a7),a1	");

asm("		movl	8(a7),a0	");

asm(".L4:	movb	(a0)+,(a1)+	");

asm("		dbf	d0,.L4		");

asm(".L5:				");

}

#else

void bmove(dst, src, len)

register char *dst;

register const char *src;

register uint len;

{

  while (len-- != 0) *dst++ = *src++;

}

#endif

#endif

#endif