libc/string/memcmp.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 Wmemcmp wmemcmp
  12 #else
  13 # define Wmemcmp memcmp
  14 #endif
  15
  16 int Wmemcmp(const Wvoid *s1, const Wvoid *s2, size_t n)
  17 {
  18         register const Wuchar *r1 = (const Wuchar *) s1;
  19         register const Wuchar *r2 = (const Wuchar *) s2;
  20
  21 #ifdef WANT_WIDE
  22         while (n && (*r1 == *r2)) {
  23                 ++r1;
  24                 ++r2;
  25                 --n;
  26         }
  27
  28         return (n == 0) ? 0 : ((*r1 < *r2) ? -1 : 1);
  29 #else
  30         int r = 0;
  31
  32         while (n-- && ((r = ((int)(*r1++)) - *r2++) == 0));
  33
  34         return r;
  35 #endif
  36 }
  37
  38 #ifndef WANT_WIDE
  39 libc_hidden_def(memcmp)
  40 # ifdef __UCLIBC_SUSV3_LEGACY__
  41 strong_alias(memcmp,bcmp)
  42 # endif
  43 #endif