mirror of https://github.com/mkerrisk/man-pages
66 lines
1.6 KiB
Groff
66 lines
1.6 KiB
Groff
.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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.\"
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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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.\"
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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 BTOWC 3 1999-07-25 "GNU" "Linux Programmer's Manual"
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.SH NAME
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btowc \- convert single byte to wide character
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.SH SYNOPSIS
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.nf
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.B #include <wchar.h>
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.sp
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.BI "wint_t btowc(int " c );
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.fi
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.SH DESCRIPTION
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The
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.BR btowc ()
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function converts \fIc\fP,
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interpreted as a multibyte sequence
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of length 1, starting in the initial shift state, to a wide character and
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returns it.
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If \fIc\fP is
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.B EOF
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or not a valid multibyte sequence of length 1,
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the
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.BR btowc ()
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function returns
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.BR WEOF .
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.SH "RETURN VALUE"
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The
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.BR btowc ()
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function returns the wide character
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converted from the single byte \fIc\fP.
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If \fIc\fP is
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.B EOF
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or not a valid multibyte sequence of length 1,
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it returns
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.BR WEOF .
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.SH "CONFORMING TO"
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C99, POSIX.1-2001.
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.SH NOTES
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The behavior of
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.BR btowc ()
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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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It does not work for encodings which have
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state, and unnecessarily treats single bytes differently from multibyte
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sequences.
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Use the function
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.BR mbtowc ()
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instead.
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.SH "SEE ALSO"
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.BR mbtowc (3)
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