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
|
/* memmove.c -- copy memory.
This file is in the public domain. */
/* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
#include <config.h>
#include <stddef.h>
/* Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate. */
void *
memmove (void *dest0, void const *source0, size_t length)
{
char *dest = dest0;
char const *source = source0;
if (source < dest)
/* Moving from low mem to hi mem; start at end. */
for (source += length, dest += length; length; --length)
*--dest = *--source;
else if (source != dest)
{
/* Moving from hi mem to low mem; start at beginning. */
for (; length; --length)
*dest++ = *source++;
}
return dest0;
}
|
