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+'\" et
+.TH WCSCASECMP "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+wcscasecmp,
+wcscasecmp_l,
+wcsncasecmp,
+wcsncasecmp_l
+\(em case-insensitive wide-character string comparison
+.SH SYNOPSIS
+.LP
+.nf
+#include <wchar.h>
+.P
+int wcscasecmp(const wchar_t *\fIws1\fP, const wchar_t *\fIws2\fP);
+int wcscasecmp_l(const wchar_t *\fIws1\fP, const wchar_t *\fIws2\fP,
+ locale_t \fIlocale\fP);
+int wcsncasecmp(const wchar_t *\fIws1\fP, const wchar_t *\fIws2\fP, size_t \fIn\fP);
+int wcsncasecmp_l(const wchar_t *\fIws1\fP, const wchar_t *\fIws2\fP,
+ size_t \fIn\fP, locale_t \fIlocale\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIwcscasecmp\fR()
+and
+\fIwcsncasecmp\fR()
+functions are the wide-character equivalent of the
+\fIstrcasecmp\fR()
+and
+\fIstrncasecmp\fR()
+functions, respectively.
+.P
+The
+\fIwcscasecmp\fR()
+and
+\fIwcscasecmp_l\fR()
+functions shall compare, while ignoring differences in case, the
+wide-character string pointed to by
+.IR ws1
+to the wide-character string pointed to by
+.IR ws2 .
+.P
+The
+\fIwcsncasecmp\fR()
+and
+\fIwcsncasecmp_l\fR()
+functions shall compare, while ignoring differences in case, not more
+than
+.IR n
+wide-characters from the wide-character string pointed to by
+.IR ws1
+to the wide-character string pointed to by
+.IR ws2 .
+.P
+The
+\fIwcscasecmp\fR()
+and
+\fIwcsncasecmp\fR()
+functions use the current locale to determine the case of the wide
+characters.
+.P
+The
+\fIwcscasecmp_l\fR()
+and
+\fIwcsncasecmp_l\fR()
+functions use the locale represented by
+.IR locale
+to determine the case of the wide characters.
+.P
+When the
+.IR LC_CTYPE
+category of the locale being used is from the POSIX locale, these
+functions shall behave as if the wide-character strings had been converted
+to lowercase and then a comparison of wide-character codes performed.
+Otherwise, the results are unspecified.
+.P
+The information for
+\fIwcscasecmp_l\fR()
+and
+\fIwcsncasecmp_l\fR()
+about the case of the characters comes from the locale represented by
+.IR locale .
+.P
+The behavior is undefined if the
+.IR locale
+argument to
+\fIwcscasecmp_l\fR()
+or
+\fIwcsncasecmp_l\fR()
+is the special locale object LC_GLOBAL_LOCALE or is not a valid locale
+object handle.
+.SH "RETURN VALUE"
+Upon completion, the
+\fIwcscasecmp\fR()
+and
+\fIwcscasecmp_l\fR()
+functions shall return an integer greater than, equal to, or less than 0
+if the wide-character string pointed to by
+.IR ws1
+is, ignoring case, greater than, equal to, or less than the
+wide-character string pointed to by
+.IR ws2 ,
+respectively.
+.P
+Upon completion, the
+\fIwcsncasecmp\fR()
+and
+\fIwcsncasecmp_l\fR()
+functions shall return an integer greater than, equal to, or less than 0
+if the possibly null wide-character terminated string pointed to by
+.IR ws1
+is, ignoring case, greater than, equal to, or less than the possibly
+null wide-character terminated string pointed to by
+.IR ws2 ,
+respectively.
+.P
+No return values are reserved to indicate an error.
+.SH ERRORS
+No errors are defined.
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+None.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIstrcasecmp\fR\^(\|)",
+.IR "\fIwcscmp\fR\^(\|)",
+.IR "\fIwcsncmp\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "\fB<wchar.h>\fP"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+In the event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .
+.PP
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .