kc3-lang/gnulib/lib/strcasecmp.c

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• Hash : 92295bc4
  Author :
  Date : 2003-06-04T19:22:29
  

  .h files should stand alone, but we shouldn't include <sys/types.h>
  if we can get away with just <stddef.h>.
  

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• lib/strcasecmp.c

• /* strcasecmp.c -- case insensitive string comparator
     Copyright (C) 1998, 1999 Free Software Foundation, Inc.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2, 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 General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software Foundation,
     Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  
  #if HAVE_CONFIG_H
  # include <config.h>
  #endif
  
  #ifdef LENGTH_LIMIT
  # define STRXCASECMP_FUNCTION strncasecmp
  # define STRXCASECMP_DECLARE_N , size_t n
  # define LENGTH_LIMIT_EXPR(Expr) Expr
  #else
  # define STRXCASECMP_FUNCTION strcasecmp
  # define STRXCASECMP_DECLARE_N /* empty */
  # define LENGTH_LIMIT_EXPR(Expr) 0
  #endif
  
  #include <stddef.h>
  #include <ctype.h>
  
  #define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch))
  
  /* Compare {{no more than N characters of }}strings S1 and S2,
     ignoring case, returning less than, equal to or
     greater than zero if S1 is lexicographically less
     than, equal to or greater than S2.  */
  
  int
  STRXCASECMP_FUNCTION (const char *s1, const char *s2 STRXCASECMP_DECLARE_N)
  {
    register const unsigned char *p1 = (const unsigned char *) s1;
    register const unsigned char *p2 = (const unsigned char *) s2;
    unsigned char c1, c2;
  
    if (p1 == p2 || LENGTH_LIMIT_EXPR (n == 0))
      return 0;
  
    do
      {
        c1 = TOLOWER (*p1);
        c2 = TOLOWER (*p2);
  
        if (LENGTH_LIMIT_EXPR (--n == 0) || c1 == '\0')
  	break;
  
        ++p1;
        ++p2;
      }
    while (c1 == c2);
  
    return c1 - c2;
  }
  

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