memmove.c

Nucleus Common Library for Integrator using ARM Developer Suite

/*************************************************************************
*
*               Copyright Mentor Graphics Corporation 2002
*                         All Rights Reserved.
*
* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS
* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS
* SUBJECT TO LICENSE TERMS.
*
*************************************************************************/

/*************************************************************************
* FILE NAME                                     VERSION
*
*       memmove.c                               Nucleus Common Library 1.1
*
* DESCRIPTION
*
*       This file contains the implementation of NCL_memmove.
*
* DATA STRUCTURES
*
*       None.
*
* FUNCTIONS
*
*       NCL_memmove
*
* DEPENDENCIES
*
*       ncl.h
*       string.h
*       nucleus.h
*
************************************************************************/

#define NU_NCL_SOURCE_FILE

#include "ncl\inc\ncl.h"
#include "ncl\inc\string.h"
#include "plus\nucleus.h"                                /* MMU Support */

/*************************************************************************
*
*   FUNCTION
*
*       NCL_memmove
*
*   DESCRIPTION
*
*      Moves values in memory.
*
*   INPUTS
*
*       s1                  Destination.
*       s2                  Source.
*       n                   Number of bytes to move.
*
*   OUTPUTS
*
*       void*               Pointer to s1.
*
*************************************************************************/

void *NCL_memmove (void *s1, const void *s2, size_t n)
{
    register unsigned char *dst = (unsigned char*) s1;
    register unsigned char *src = (unsigned char*) s2;
    register unsigned char *end;

    if (dst < src)
        for (end=src+n ;src<end ;)
            *dst++ = *src++;
    else
        for (end=src, src+=n, dst+=n; src>end;)
            *--dst = *--src;

    return (s1);
}