| .\" Copyright (c) Bruno Haible <haible@clisp.cons.org> |
| .\" |
| .\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA) |
| .\" This is free documentation; you can redistribute it and/or |
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| .\" published by the Free Software Foundation; either version 2 of |
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| .\" %%%LICENSE_END |
| .\" |
| .\" References consulted: |
| .\" GNU glibc-2 source code and manual |
| .\" Dinkumware C library reference http://www.dinkumware.com/ |
| .\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html |
| .\" ISO/IEC 9899:1999 |
| .\" |
| .TH WCSNCMP 3 2021-03-22 "GNU" "Linux Programmer's Manual" |
| .SH NAME |
| wcsncmp \- compare two fixed-size wide-character strings |
| .SH SYNOPSIS |
| .nf |
| .B #include <wchar.h> |
| .PP |
| .BI "int wcsncmp(const wchar_t *" s1 ", const wchar_t *" s2 ", size_t " n ); |
| .fi |
| .SH DESCRIPTION |
| The |
| .BR wcsncmp () |
| function is the wide-character equivalent of the |
| .BR strncmp (3) |
| function. |
| It compares the wide-character string pointed to by |
| .I s1 |
| and the |
| wide-character string pointed to by |
| .IR s2 , |
| but at most |
| .I n |
| wide |
| characters from each string. |
| In each string, the comparison extends only up |
| to the first occurrence of a null wide character (L\(aq\e0\(aq), if any. |
| .SH RETURN VALUE |
| The |
| .BR wcsncmp () |
| function returns zero if the wide-character strings at |
| .I s1 |
| and |
| .IR s2 , |
| truncated to at most length |
| .IR n , |
| are equal. |
| It returns an integer greater than zero if at the first differing position |
| .I i |
| .RI ( i |
| < |
| .IR n ), |
| the corresponding wide-character |
| .I s1[i] |
| is |
| greater than |
| .IR s2[i] . |
| It returns an integer less than zero if at the first |
| differing position |
| .I i |
| .RI ( i |
| < |
| .IR n ), |
| the corresponding |
| wide-character |
| .I s1[i] |
| is less than |
| .IR s2[i] . |
| .SH ATTRIBUTES |
| For an explanation of the terms used in this section, see |
| .BR attributes (7). |
| .ad l |
| .nh |
| .TS |
| allbox; |
| lbx lb lb |
| l l l. |
| Interface Attribute Value |
| T{ |
| .BR wcsncmp () |
| T} Thread safety MT-Safe |
| .TE |
| .hy |
| .ad |
| .sp 1 |
| .SH CONFORMING TO |
| POSIX.1-2001, POSIX.1-2008, C99. |
| .SH SEE ALSO |
| .BR strncmp (3), |
| .BR wcsncasecmp (3) |