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wctomb(3)
WCTOMB(3) Linux Programmer's Manual WCTOMB(3)
NAME
wctomb - convert a wide character to a multibyte sequence
SYNOPSIS
#include <stdlib.h>
int wctomb(char *s, wchar_t wc);
DESCRIPTION
If s is not NULL, the wctomb() function converts the wide character wc
to its multibyte representation and stores it at the beginning of the
character array pointed to by s. It updates the shift state, which is
stored in a static anonymous variable known only to the wctomb() func‐
tion, and returns the length of said multibyte representation, that is,
the number of bytes written at s.
The programmer must ensure that there is room for at least MB_CUR_MAX
bytes at s.
If s is NULL, the wctomb() function resets the shift state, known only
to this function, to the initial state, and returns nonzero if the
encoding has nontrivial shift state, or zero if the encoding is state‐
less.
RETURN VALUE
If s is not NULL, the wctomb() function returns the number of bytes
that have been written to the byte array at s. If wc can not be repre‐
sented as a multibyte sequence (according to the current locale), -1 is
returned.
If s is NULL, the wctomb() function returns nonzero if the encoding has
nontrivial shift state, or zero if the encoding is stateless.
ATTRIBUTES
For an explanation of the terms used in this section, see
attributes(7).
allbox; lb lb lb l l l. Interface Attribute Value T{ wctomb()
T} Thread safety MT-Unsafe race
CONFORMING TO
POSIX.1-2001, POSIX.1-2008, C99.
NOTES
The behavior of wctomb() depends on the LC_CTYPE category of the cur‐
rent locale.
The function wcrtomb(3) provides a better interface to the same func‐
tionality.
SEE ALSO
MB_CUR_MAX(3), mblen(3), mbstowcs(3), mbtowc(3), wcrtomb(3),
wcstombs(3)
COLOPHON
This page is part of release 5.02 of the Linux man-pages project. A
description of the project, information about reporting bugs, and the
latest version of this page, can be found at
https://www.kernel.org/doc/man-pages/.
GNU 2015-08-08 WCTOMB(3)