wctomb(3) [opendarwin man page]

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()
       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.

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).

       +----------+---------------+----------------+
       |Interface | Attribute	  | Value	   |
       +----------+---------------+----------------+
       |wctomb()  | 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 current locale.

       The function wcrtomb(3) provides a better interface to the same functionality.

SEE ALSO

       MB_CUR_MAX(3), mblen(3), mbstowcs(3), mbtowc(3), wcrtomb(3), wcstombs(3)

COLOPHON

       This  page is part of release 4.15 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)

MBTOWC(3)						     Linux Programmer's Manual							 MBTOWC(3)

NAME

       mbtowc - convert a multibyte sequence to a wide character

SYNOPSIS

       #include <stdlib.h>

       int mbtowc(wchar_t *pwc, const char *s, size_t n);

DESCRIPTION

       The main case for this function is when s is not NULL and pwc is not NULL.  In this case, the mbtowc() function inspects at most n bytes of
       the multibyte string starting at s, extracts the next complete multibyte character, converts it to a wide character and stores it at  *pwc.
       It  updates  an internal shift state known only to the mbtowc() function.  If s does not point to a null byte (''), it returns the number
       of bytes that were consumed from s, otherwise it returns 0.

       If the n bytes starting at s do not contain a complete multibyte character, or if they contain  an  invalid  multibyte  sequence,  mbtowc()
       returns -1.  This can happen even if n >= MB_CUR_MAX, if the multibyte string contains redundant shift sequences.

       A  different  case  is  when  s is not NULL but pwc is NULL.  In this case, the mbtowc() function behaves as above, except that it does not
       store the converted wide character in memory.

       A third case is when s is NULL.	In this case, pwc and n are ignored.  The mbtowc() function resets the shift state,  only  known  to  this
       function, to the initial state, and returns nonzero if the encoding has nontrivial shift state, or zero if the encoding is stateless.

RETURN VALUE

       If  s  is  not  NULL, the mbtowc() function returns the number of consumed bytes starting at s, or 0 if s points to a null byte, or -1 upon
       failure.

       If s is NULL, the mbtowc() 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).

       +----------+---------------+----------------+
       |Interface | Attribute	  | Value	   |
       +----------+---------------+----------------+
       |mbtowc()  | Thread safety | MT-Unsafe race |
       +----------+---------------+----------------+
CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C99.

NOTES

       The behavior of mbtowc() depends on the LC_CTYPE category of the current locale.

       This function is not multithread safe.  The function mbrtowc(3) provides a better interface to the same functionality.

SEE ALSO

       MB_CUR_MAX(3), mblen(3), mbrtowc(3), mbstowcs(3), wcstombs(3), wctomb(3)

COLOPHON

       This page is part of release 4.15 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
								    2016-10-08								 MBTOWC(3)