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c-strncasecmp.c

Absolute File Name:/home/opencoverage/opencoverage/guest-scripts/coreutils/src/lib/c-strncasecmp.c
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1/* c-strncasecmp.c -- case insensitive string comparator in C locale-
2 Copyright (C) 1998-1999, 2005-2006, 2009-2018 Free Software Foundation, Inc.-
3-
4 This program is free software; you can redistribute it and/or modify-
5 it under the terms of the GNU General Public License as published by-
6 the Free Software Foundation; either version 3, or (at your option)-
7 any later version.-
8-
9 This program is distributed in the hope that it will be useful,-
10 but WITHOUT ANY WARRANTY; without even the implied warranty of-
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the-
12 GNU General Public License for more details.-
13-
14 You should have received a copy of the GNU General Public License-
15 along with this program; if not, see <https://www.gnu.org/licenses/>. */-
16-
17#include <config.h>-
18-
19/* Specification. */-
20#include "c-strcase.h"-
21-
22#include <limits.h>-
23-
24#include "c-ctype.h"-
25-
26int-
27c_strncasecmp (const char *s1, const char *s2, size_t n)-
28{-
29 register const unsigned char *p1 = (const unsigned char *) s1;-
30 register const unsigned char *p2 = (const unsigned char *) s2;-
31 unsigned char c1, c2;-
32-
33 if (p1 == p2 || n == 0)
p1 == p2Description
TRUEnever evaluated
FALSEnever evaluated
n == 0Description
TRUEnever evaluated
FALSEnever evaluated
0
34 return 0;
never executed: return 0;
0
35-
36 do-
37 {-
38 c1 = c_tolower (*p1);-
39 c2 = c_tolower (*p2);-
40-
41 if (--n == 0 || c1 == '\0')
--n == 0Description
TRUEnever evaluated
FALSEnever evaluated
c1 == '\0'Description
TRUEnever evaluated
FALSEnever evaluated
0
42 break;
never executed: break;
0
43-
44 ++p1;-
45 ++p2;-
46 }
never executed: end of block
0
47 while (c1 == c2);
c1 == c2Description
TRUEnever evaluated
FALSEnever evaluated
0
48-
49 if (UCHAR_MAX <= INT_MAX)
(0x7f * 2 + 1) <= 0x7fffffffDescription
TRUEnever evaluated
FALSEnever evaluated
0
50 return c1 - c2;
never executed: return c1 - c2;
0
51 else-
52 /* On machines where 'char' and 'int' are types of the same size, the-
53 difference of two 'unsigned char' values - including the sign bit --
54 doesn't fit in an 'int'. */-
55 return (c1 > c2 ? 1 : c1 < c2 ? -1 : 0);
never executed: return (c1 > c2 ? 1 : c1 < c2 ? -1 : 0);
0
56}-
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