libc/string/memmove.c

   1 /*
   2  * Copyright (C) 2002     Manuel Novoa III
   3  * Copyright (C) 2000-2005 Erik Andersen <andersen@uclibc.org>
   4  *
   5  * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
   6  */
   7
   8 #include "_string.h"
   9
  10 #ifdef WANT_WIDE
  11 # define Wmemmove wmemmove
  12 #else
  13 # define Wmemmove memmove
  14 #endif
  15
  16 Wvoid *Wmemmove(Wvoid *s1, const Wvoid *s2, size_t n)
  17 {
  18         register Wchar *s = (Wchar *) s1;
  19         register const Wchar *p = (const Wchar *) s2;
  20
  21         if (p >= s) {
  22                 while (n) {
  23                         *s++ = *p++;
  24                         --n;
  25                 }
  26         } else {
  27                 while (n) {
  28                         --n;
  29                         s[n] = p[n];
  30                 }
  31         }
  32
  33         return s1;
  34 }
  35
  36 #ifndef WANT_WIDE
  37 libc_hidden_def(memmove)
  38 #endif