sysdeps/x86_64/multiarch/strcasestr-nonascii.c

   1 /* strstr with SSE4.2 intrinsics
   2    Copyright (C) 2010 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 # include <ctype.h>
  20
  21
  22 /* Similar to __m128i_strloadu.  Convert to lower case for none-POSIX/C
  23    locale.  */
  24 static inline __m128i
  25 __m128i_strloadu_tolower (const unsigned char *p)
  26 {
  27   union
  28     {
  29       char b[16];
  30       __m128i x;
  31     } u;
  32
  33   for (int i = 0; i < 16; ++i)
  34     if (p[i] == 0)
  35       {
  36         u.b[i] = 0;
  37         break;
  38       }
  39     else
  40       u.b[i] = tolower (p[i]);
  41
  42   return u.x;
  43 }
  44
  45
  46 #define STRCASESTR_NONASCII
  47 #define USE_AS_STRCASESTR
  48 #define STRSTR_SSE42 __strcasestr_sse42_nonascii
  49 #include "strstr.c"