File: bcopy.c

package info (click to toggle)
pspp 0.7.9%2Bgit20120620-1.1
  • links: PTS
  • area: main
  • in suites: wheezy
  • size: 71,980 kB
  • sloc: ansic: 384,310; sh: 22,024; cpp: 1,445; yacc: 1,251; perl: 903; lisp: 868; makefile: 358; xml: 182; java: 5
file content (23 lines) | stat: -rw-r--r-- 640 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
 
/* bcopy.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>.  */

#include <config.h>

#include <stddef.h>

void
bcopy (void const *source0, void *dest0, size_t length)
{
  char const *source = source0;
  char *dest = dest0;
  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++;
}