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wcscasecmp(3) — Linux manual page

wcscasecmp(3)            Library Functions Manualwcscasecmp(3)

NAME        top

       wcscasecmp, wcsncasecmp - compare two wide-character strings,       ignoring case

LIBRARY        top

       Standard C library (libc,-lc)

SYNOPSIS        top

#include <wchar.h>int wcscasecmp(const wchar_t *s1, const wchar_t *s2);int wcsncasecmp(size_t n;const wchar_ts1[n], const wchar_ts2[n], size_tn);   Feature Test Macro Requirements for glibc (seefeature_test_macros(7)):wcscasecmp(),wcsncasecmp():           Since glibc 2.10:               _POSIX_C_SOURCE >= 200809L           Before glibc 2.10:               _GNU_SOURCE

DESCRIPTION        top

       Thewcscasecmp() function is the wide-character equivalent of thestrcasecmp(3) function.  It compares the wide-character string       pointed to bys1 and the wide-character string pointed to bys2,       ignoring case differences (towupper(3),towlower(3)).       Thewcsncasecmp() function is similar (the wide-character       equivalent ofstrncasecmp(3)), except that it compares no more       thann wide characters ofs1 ands2.

RETURN VALUE        top

       Thewcscasecmp() andwcsncasecmp() functions return an integer       less than, equal to, or greater than zero ifs1 is, after ignoring       case, found to be less than, to match, or be greater thans2,       respectively.

ATTRIBUTES        top

       For an explanation of the terms used in this section, seeattributes(7).       ┌───────────────────────────────┬───────────────┬────────────────┐       │Interface│Attribute│Value│       ├───────────────────────────────┼───────────────┼────────────────┤       │wcscasecmp(),wcsncasecmp()   │ Thread safety │ MT-Safe locale │       └───────────────────────────────┴───────────────┴────────────────┘

STANDARDS        top

       POSIX.1-2008.

HISTORY        top

       glibc 2.1.

NOTES        top

       The behavior ofwcscasecmp() depends on theLC_CTYPEcategory of       the current locale.

SEE ALSO        top

strcasecmp(3),wcscmp(3)

COLOPHON        top

       This page is part of theman-pages (Linux kernel and C library       user-space interface documentation) project.  Information about       the project can be found at        ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report       for this manual page, see       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.       This page was obtained from the tarball man-pages-6.15.tar.gz       fetched from       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on       2025-08-11.  If you discover any rendering problems in this HTML       version of the page, or you believe there is a better or more up-       to-date source for the page, or you have corrections or       improvements to the information in this COLOPHON (which isnot       part of the original manual page), send a mail to       man-pages@man7.orgLinux man-pages 6.15            2025-06-28wcscasecmp(3)

Pages that refer to this page:strcasecmp(3), wcscmp(3), wcsncmp(3)

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