src/portab/memmove.c

   1 /*
   2  * ngIRCd -- The Next Generation IRC Daemon
   3  */
   4
   5 #include "portab.h"
   6
   7 /**
   8  * @file
   9  * memmove() implementation.
  10  * Source: http://c-faq.com/~scs/cgi-bin/faqcat.cgi?sec=ansi
  11  */
  12
  13 #ifndef HAVE_MEMMOVE
  14
  15 GLOBAL void *
  16 memmove(void *dest, void const *src, size_t n)
  17 {
  18         register char *dp = dest;
  19         register char const *sp = src;
  20         if(dp < sp) {
  21                 while(n-- > 0)
  22                         *dp++ = *sp++;
  23         } else {
  24                 dp += n;
  25                 sp += n;
  26                 while(n-- > 0)
  27                         *--dp = *--sp;
  28         }
  29
  30         return dest;
  31 }
  32
  33 #endif