/src/libidn/lib/gl/c-strcasecmp.c
Line | Count | Source (jump to first uncovered line) |
1 | | /* c-strcasecmp.c -- case insensitive string comparator in C locale |
2 | | Copyright (C) 1998-1999, 2005-2006, 2009-2023 Free Software Foundation, Inc. |
3 | | |
4 | | This file is free software: you can redistribute it and/or modify |
5 | | it under the terms of the GNU Lesser General Public License as |
6 | | published by the Free Software Foundation; either version 2.1 of the |
7 | | License, or (at your option) any later version. |
8 | | |
9 | | This file 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 Lesser General Public License for more details. |
13 | | |
14 | | You should have received a copy of the GNU Lesser 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 | | |
26 | | int |
27 | | c_strcasecmp (const char *s1, const char *s2) |
28 | 16.7k | { |
29 | 16.7k | register const unsigned char *p1 = (const unsigned char *) s1; |
30 | 16.7k | register const unsigned char *p2 = (const unsigned char *) s2; |
31 | 16.7k | unsigned char c1, c2; |
32 | | |
33 | 16.7k | if (p1 == p2) |
34 | 0 | return 0; |
35 | | |
36 | 16.7k | do |
37 | 28.6k | { |
38 | 28.6k | c1 = c_tolower (*p1); |
39 | 28.6k | c2 = c_tolower (*p2); |
40 | | |
41 | 28.6k | if (c1 == '\0') |
42 | 806 | break; |
43 | | |
44 | 27.8k | ++p1; |
45 | 27.8k | ++p2; |
46 | 27.8k | } |
47 | 27.8k | while (c1 == c2); |
48 | | |
49 | 16.7k | if (UCHAR_MAX <= INT_MAX) |
50 | 16.7k | return c1 - c2; |
51 | 0 | 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 | 0 | return _GL_CMP (c1, c2); |
56 | 16.7k | } |