source: trunk/kernel/libk/memcpy.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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1/*
2 * memcpy.c - architecture independent memory copy functions
3 *
4 * Author ALain Greiner (2016)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <hal_types.h>
25
26/////////////////////////////////
27void * memcpy( void       * dst,
28               const void * src,
29               uint32_t     size) 
30{
31    uint32_t       * wdst = dst;
32    const uint32_t * wsrc = src;
33
34    if (!((uint32_t) wdst & 3) && !((uint32_t) wsrc & 3) )
35    {
36        while (size > 3) 
37        {
38            *wdst++ = *wsrc++;
39            size -= 4;
40        }
41    }
42
43    unsigned char *cdst = (unsigned char*)wdst;
44    unsigned char *csrc = (unsigned char*)wsrc;
45
46    while (size--) 
47    {
48        *cdst++ = *csrc++;
49    }
50    return dst;
51}
52
53///////////////////////////
54void * memset( void   * dst, 
55               int      s,
56               uint32_t size) 
57{
58    char * a = (char *) dst;
59    while (size--)
60    {
61        *a++ = (char)s;
62    }
63    return dst;
64}
65
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