mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-19 05:28:58 +08:00
25 lines
634 B
C
25 lines
634 B
C
|
/* memmove.c -- copy memory.
|
||
|
|
Copy LENGTH bytes from SOURCE to DEST. Does not null-terminate.
|
||
|
|
In the public domain.
|
||
|
|
By David MacKenzie <djm@gnu.ai.mit.edu>. */
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
#include <config.h>
|
||
|
|
#endif
|
||
|
|
|
||
|
|
void
|
||
|
|
memmove (dest, source, length)
|
||
|
|
char *dest;
|
||
|
|
const char *source;
|
||
|
|
unsigned length;
|
||
|
|
{
|
||
|
|
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++;
|
||
|
|
}
|