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1 | .\" Copyright (c) Bruno Haible <haible@clisp.cons.org> |
2 | .\" | |
89e3ffe9 | 3 | .\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA) |
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4 | .\" This is free documentation; you can redistribute it and/or |
5 | .\" modify it under the terms of the GNU General Public License as | |
6 | .\" published by the Free Software Foundation; either version 2 of | |
7 | .\" the License, or (at your option) any later version. | |
fe382ebf | 8 | .\" %%%LICENSE_END |
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9 | .\" |
10 | .\" References consulted: | |
11 | .\" GNU glibc-2 source code and manual | |
12 | .\" Dinkumware C library reference http://www.dinkumware.com/ | |
008f1ecc | 13 | .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html |
fea681da | 14 | .\" |
97986708 | 15 | .TH WCSNCASECMP 3 2016-03-15 "GNU" "Linux Programmer's Manual" |
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16 | .SH NAME |
17 | wcsncasecmp \- compare two fixed-size wide-character strings, ignoring case | |
18 | .SH SYNOPSIS | |
19 | .nf | |
20 | .B #include <wchar.h> | |
68e4db0a | 21 | .PP |
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22 | .BI "int wcsncasecmp(const wchar_t *" s1 ", const wchar_t *" s2 ", size_t " n ); |
23 | .fi | |
68e4db0a | 24 | .PP |
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25 | .in -4n |
26 | Feature Test Macro Requirements for glibc (see | |
27 | .BR feature_test_macros (7)): | |
28 | .in | |
68e4db0a | 29 | .PP |
df362fbf | 30 | .BR wcsncasecmp (): |
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31 | .PD 0 |
32 | .ad l | |
33 | .RS 4 | |
34 | .TP 4 | |
35 | Since glibc 2.10: | |
b0da7b8b | 36 | _POSIX_C_SOURCE\ >=\ 200809L |
ea91c3fd | 37 | .TP |
df362fbf MK |
38 | Before glibc 2.10: |
39 | _GNU_SOURCE | |
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40 | .RE |
41 | .ad | |
42 | .PD | |
fea681da | 43 | .SH DESCRIPTION |
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44 | The |
45 | .BR wcsncasecmp () | |
46 | function is the wide-character equivalent of the | |
47 | .BR strncasecmp (3) | |
48 | function. | |
c13182ef | 49 | It compares the wide-character string pointed to |
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50 | by |
51 | .I s1 | |
52 | and the wide-character string | |
53 | pointed to by | |
54 | .IR s2 , | |
55 | but at most | |
56 | .I n | |
57 | wide characters from each string, ignoring case differences | |
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58 | .RB ( towupper (3), |
59 | .BR towlower (3)). | |
47297adb | 60 | .SH RETURN VALUE |
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61 | The |
62 | .BR wcsncasecmp () | |
63 | function returns zero | |
c13182ef | 64 | if the wide-character strings at |
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65 | .I s1 |
66 | and | |
67 | .IR s2 , | |
68 | truncated to at most length | |
69 | .IR n , | |
70 | are equal except | |
c13182ef | 71 | for case distinctions. |
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72 | It returns a positive integer if truncated |
73 | .I s1 | |
74 | is | |
75 | greater than truncated | |
76 | .IR s2 , | |
77 | ignoring case. | |
c13182ef | 78 | It returns a negative integer |
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79 | if truncated |
80 | .I s1 | |
81 | is smaller than truncated | |
82 | .IR s2 , | |
83 | ignoring case. | |
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84 | .SH VERSIONS |
85 | The | |
86 | .BR wcsncasecmp () | |
87 | function is provided in glibc since version 2.1. | |
0ba1ba74 | 88 | .SH ATTRIBUTES |
abe46393 PH |
89 | For an explanation of the terms used in this section, see |
90 | .BR attributes (7). | |
91 | .TS | |
92 | allbox; | |
93 | lb lb lb | |
94 | l l l. | |
95 | Interface Attribute Value | |
96 | T{ | |
0ba1ba74 | 97 | .BR wcsncasecmp () |
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98 | T} Thread safety MT-Safe locale |
99 | .TE | |
47297adb | 100 | .SH CONFORMING TO |
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101 | POSIX.1-2008. |
102 | This function is not specified in POSIX.1-2001, | |
103 | and is not widely available on other systems. | |
fea681da | 104 | .SH NOTES |
d9bfdb9c | 105 | The behavior of |
60a90ecd | 106 | .BR wcsncasecmp () |
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107 | depends on the |
108 | .B LC_CTYPE | |
109 | category of the | |
fea681da | 110 | current locale. |
47297adb | 111 | .SH SEE ALSO |
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112 | .BR strncasecmp (3), |
113 | .BR wcsncmp (3) |