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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ATTRIBUTES | CONFORMING TO | NOTES | SEE ALSO | COLOPHON |
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WCTOMB(3) Linux Programmer's Manual WCTOMB(3)
wctomb - convert a wide character to a multibyte sequence
#include <stdlib.h>
int wctomb(char *s, wchar_t wc);
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() function, 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 stateless.
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 (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.
For an explanation of the terms used in this section, see
attributes(7).
┌───────────────────────────────┬───────────────┬────────────────┐
│Interface │ Attribute │ Value │
├───────────────────────────────┼───────────────┼────────────────┤
│wctomb() │ Thread safety │ MT-Unsafe race │
└───────────────────────────────┴───────────────┴────────────────┘
POSIX.1-2001, POSIX.1-2008, C99.
The behavior of wctomb() depends on the LC_CTYPE category of the
current locale.
The function wcrtomb(3) provides a better interface to the same
functionality.
MB_CUR_MAX(3), mblen(3), mbstowcs(3), mbtowc(3), wcrtomb(3),
wcstombs(3)
This page is part of release 5.13 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 2021-03-22 WCTOMB(3)
Pages that refer to this page: MB_CUR_MAX(3), mbstowcs(3), mbtowc(3), wcstombs(3), wctob(3), locale(7), unicode(7)
Copyright and license for this manual page
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