kc3-lang/gnulib/lib/memcmp2.c

• Show log

  Commit

• Hash : efa15594
  Author :
  Date : 2020-07-22T18:35:20
  

  Optimize three-valued comparison between integers.
  
  (a > b ? 1 : a < b ? -1 : 0) is the same as (a > b) - (a < b).
  
  * m4/gnulib-common.m4 (gl_COMMON): Define _GL_CMP.
  * lib/c-strcasecmp.c (c_strcasecmp): Use _GL_CMP.
  * lib/c-strncasecmp.c (c_strncasecmp): Likewise.
  * lib/dfa.c (compare): Likewise.
  * lib/fts.c (fts_compare_ino): Likewise.
  * lib/mbmemcasecmp.c (mbmemcasecmp): Likewise.
  * lib/mbscasecmp.c (mbscasecmp): Likewise.
  * lib/mbsncasecmp.c (mbsncasecmp): Likewise.
  * lib/memcasecmp.c (memcasecmp): Likewise.
  * lib/memcmp2.c (memcmp2): Likewise.
  * lib/savedir.c (direntry_cmp_inode): Likewise.
  * lib/strcasecmp.c (strcasecmp): Likewise.
  * lib/strncasecmp.c (strncasecmp): Likewise.
  * lib/unistr/u-cmp2.h (FUNC): Likewise.
  

Download

• lib/memcmp2.c

• /* Compare two memory areas with possibly different lengths.
     Copyright (C) 2009-2020 Free Software Foundation, Inc.
  
     This program is free software: you can redistribute it and/or modify it
     under the terms of the GNU Lesser General Public License as published
     by the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include "memcmp2.h"
  
  #include <string.h>
  
  int
  memcmp2 (const char *s1, size_t n1, const char *s2, size_t n2)
  {
    int cmp = memcmp (s1, s2, n1 <= n2 ? n1 : n2);
    if (cmp == 0)
      cmp = _GL_CMP (n1, n2);
    return cmp;
  }
  

Download