mirror of https://github.com/mkerrisk/man-pages
85 lines
1.9 KiB
Groff
85 lines
1.9 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 WCTOB 3 2017-09-15 "GNU" "Linux Programmer's Manual"
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.SH NAME
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wctob \- try to represent a wide character as a single byte
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.SH SYNOPSIS
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.nf
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.B #include <wchar.h>
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.PP
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.BI "int wctob(wint_t " c );
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.fi
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.SH DESCRIPTION
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The
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.BR wctob ()
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function tests whether
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the multibyte representation of the
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wide character
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.IR c ,
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starting in the initial state, consists of a single
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byte.
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If so, it is returned as an
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.IR "unsigned char" .
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.PP
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Never use this function.
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It cannot help you in writing internationalized
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programs.
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Internationalized programs must never distinguish single-byte and
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multibyte characters.
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.SH RETURN VALUE
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The
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.BR wctob ()
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function returns the single-byte representation of
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.IR c ,
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if it exists, or
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.B EOF
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otherwise.
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.SH ATTRIBUTES
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For an explanation of the terms used in this section, see
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.BR attributes (7).
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.TS
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allbox;
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lb lb lb
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l l l.
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Interface Attribute Value
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T{
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.BR wctob ()
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T} Thread safety MT-Safe
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.TE
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.sp 1
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.SH CONFORMING TO
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POSIX.1-2001, POSIX.1-2008, C99.
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.SH NOTES
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The behavior of
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.BR wctob ()
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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 should never be used.
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Internationalized programs must never
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distinguish single-byte and multibyte characters.
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Use either
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.BR wctomb (3)
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or the thread-safe
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.BR wcrtomb (3)
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instead.
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.SH SEE ALSO
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.BR btowc (3),
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.BR wcrtomb (3),
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.BR wctomb (3)
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