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 only known to the wctomb function, and
returns the length of said multibyte representation, i.e.
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,
only known to this function, to the initial state, and
returns non-zero if the encoding has non-trivial shift
state, or zero if the encoding is stateless.
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 represented as a multibyte sequence (accord
ing to the current locale), -1 is returned.
If s is NULL, the wctomb function returns non-zero if the
encoding has non-trivial shift state, or zero if the
encoding is stateless.
CONFORMING TO
ISO/ANSI C, UNIX98
SEE ALSO
wcrtomb(3), wcstombs(3), MB_CUR_MAX(3)
NOTES
The behaviour of wctomb depends on the LC_CTYPE category
of the current locale.
This function is not multi-thread safe. The function wcr
tomb provides a better interface to the same functional
ity.
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