lib/c-strncasecmp.c

/* [<][>][^][v][top][bottom][index][help] */
This source file includes following definitions.
c_strncasecmp
     1 /* c-strncasecmp.c -- case insensitive string comparator in C locale
     2    Copyright (C) 1998-1999, 2005-2006, 2009-2023 Free Software
     3    Foundation, Inc.
     4 
     5    This file is free software: you can redistribute it and/or modify
     6    it under the terms of the GNU Lesser General Public License as
     7    published by the Free Software Foundation; either version 2.1 of the
     8    License, or (at your option) any later version.
     9 
    10    This file 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
    13    GNU Lesser General Public License for more details.
    14 
    15    You should have received a copy of the GNU Lesser General Public License
    16    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
    17 
    18 #include <config.h>
    19 
    20 /* Specification.  */
    21 #include "c-strcase.h"
    22 
    23 #include <limits.h>
    24 
    25 #include "c-ctype.h"
    26 
    27 int
    28 c_strncasecmp (const char *s1, const char *s2, size_t n)
    29 {
    30   register const unsigned char *p1 = (const unsigned char *) s1;
    31   register const unsigned char *p2 = (const unsigned char *) s2;
    32   unsigned char c1, c2;
    33 
    34   if (p1 == p2 || n == 0)
    35     return 0;
    36 
    37   do
    38     {
    39       c1 = c_tolower (*p1);
    40       c2 = c_tolower (*p2);
    41 
    42       if (--n == 0 || c1 == '\0')
    43         break;
    44 
    45       ++p1;
    46       ++p2;
    47     }
    48   while (c1 == c2);
    49 
    50   if (UCHAR_MAX <= INT_MAX)
    51     return c1 - c2;
    52   else
    53     /* On machines where 'char' and 'int' are types of the same size, the
    54        difference of two 'unsigned char' values - including the sign bit -
    55        doesn't fit in an 'int'.  */
    56     return _GL_CMP (c1, c2);
    57 }
/* [<][>][^][v][top][bottom][index][help] */
root/lib/c-strncasecmp.c

DEFINITIONS
