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
|
/* Copyright Richard A. O'Keefe.
Copyright (c) 2000 TXT DataKonsult Ab & Monty Program Ab
Copyright (c) 2009-2011, Monty Program Ab
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must the following disclaimer in
the documentation and/or other materials provided with the
distribution.
THIS SOFTWARE IS PROVIDED BY <COPYRIGHT HOLDER> ``AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
*/
/* File : memset.c
Author : Richard A. O'Keefe.
Updated: 25 May 1984
Defines: memset()
memset(dst, chr, len)
fills the memory area dst[0..len-1] with len bytes all equal to chr.
The result is dst. See also bfill(), which has no return value and
puts the last two arguments the other way around.
Note: the VAX assembly code version can only handle 0 <= len < 2^16.
It is presented for your interest and amusement.
*/
#include "strings.h"
#if VaxAsm
char *memset(char *dst,int chr, int len)
{
asm("movc5 $0,*4(ap),8(ap),12(ap),*4(ap)");
return dst;
}
#else ~VaxAsm
char *memset(char *dst, register pchar chr, register int len)
{
register char *d;
for (d = dst; --len >= 0; *d++ = chr) ;
return dst;
}
#endif VaxAsm
|
