File: memmove.c

package info (click to toggle)
renameutils 0.8.1-4
  • links: PTS
  • area: main
  • in suites: etch, etch-m68k
  • size: 2,752 kB
  • ctags: 2,052
  • sloc: ansic: 20,327; sh: 3,941; makefile: 154; sed: 16
file content (28 lines) | stat: -rw-r--r-- 699 bytes parent folder | download | duplicates (15) 
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.
   Copy LENGTH bytes from SOURCE to DEST.  Does not null-terminate.
   In the public domain.
   By David MacKenzie <djm@gnu.ai.mit.edu>.  */

#if HAVE_CONFIG_H
# include <config.h>
#endif

#include <stddef.h>

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;
}