mirror of https://github.com/mkerrisk/man-pages
69 lines
1.5 KiB
Groff
69 lines
1.5 KiB
Groff
.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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.\"
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.\" %%%LICENSE_START(GPLv2+_DOC_ONEPARA)
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\" %%%LICENSE_END
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.\"
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.\" References consulted:
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.\" GNU glibc-2 source code and manual
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.\" Dinkumware C library reference http://www.dinkumware.com/
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.\" OpenGroup's Single UNIX specification http://www.UNIX-systems.org/online.html
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.\" ISO/IEC 9899:1999
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.\"
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.TH TOWUPPER 3 1999-07-25 "GNU" "Linux Programmer's Manual"
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.SH NAME
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towupper \- convert a wide character to uppercase
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.SH SYNOPSIS
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.nf
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.B #include <wctype.h>
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.sp
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.BI "wint_t towupper(wint_t " wc );
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.fi
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.SH DESCRIPTION
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The
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.BR towupper ()
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function is the wide-character equivalent of the
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.BR toupper (3)
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function.
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If
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.I wc
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is a wide character, it is converted to
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uppercase.
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Characters which do not have case are returned unchanged.
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If
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.IR wc
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is
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.BR WEOF ,
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.B WEOF
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is returned.
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.SH RETURN VALUE
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The
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.BR towupper ()
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function returns the uppercase equivalent of
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.IR wc ,
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or
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.BR WEOF
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if
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.I wc
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is
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.BR WEOF .
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.SH CONFORMING TO
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C99.
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.SH NOTES
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The behavior of
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.BR towupper ()
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depends on the
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.B LC_CTYPE
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category of the
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current locale.
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.PP
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This function is not very appropriate for dealing with Unicode characters,
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because Unicode knows about three cases: upper, lower and title case.
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.SH SEE ALSO
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.BR iswupper (3),
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.BR towctrans (3),
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.BR towlower (3)
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