1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* $Id: kHlpMemPCopy.c 29 2009-07-01 20:30:29Z bird $ */
/** @file
* kHlpString - kHlpMemPCopy.
*/
/*
* Copyright (c) 2006-2007 Knut St. Osmundsen <bird-kStuff-spamix@anduin.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
/*******************************************************************************
* Header Files *
*******************************************************************************/
#include <k/kHlpString.h>
KHLP_DECL(void *) kHlpMemPCopy(void *pv1, const void *pv2, KSIZE cb)
{
union
{
void *pv;
KU8 *pb;
KUPTR *pu;
} u1;
union
{
const void *pv;
const KU8 *pb;
const KUPTR *pu;
} u2;
u1.pv = pv1;
u2.pv = pv2;
if (cb >= 32)
{
while (cb > sizeof(KUPTR))
{
cb -= sizeof(KUPTR);
*u1.pu++ = *u2.pu++;
}
}
while (cb-- > 0)
*u1.pb++ = *u2.pb++;
return u1.pb;
}
|
