minix man page for wcsrtombs

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

NAME
       wcsrtombs - convert a wide-character string to a multibyte string

SYNOPSIS
       #include <wchar.h>

       size_t wcsrtombs(char *dest, const wchar_t **src,
			size_t len, mbstate_t *ps);

DESCRIPTION
       If  dest is not NULL, the wcsrtombs() function converts the wide-character string *src to a multibyte string starting at dest.  At most len
       bytes are written to dest.  The shift state *ps is updated.  The conversion is effectively performed by	repeatedly  calling  wcrtomb(dest,
       *src,  ps),  as	long as this call succeeds, and then incrementing dest by the number of bytes written and *src by one.	The conversion can
       stop for three reasons:

       1. A wide character has been encountered that can not be represented as a multibyte sequence (according to the current  locale).   In  this
	  case, *src is left pointing to the invalid wide character, (size_t) -1 is returned, and errno is set to EILSEQ.

       2. The length limit forces a stop.  In this case, *src is left pointing to the next wide character to be converted, and the number of bytes
	  written to dest is returned.

       3. The wide-character string has been completely converted, including the terminating null wide	character  (L''),  which  has  the  side
	  effect of bringing back *ps to the initial state.  In this case, *src is set to NULL, and the number of bytes written to dest, excluding
	  the terminating null byte (''), is returned.

       If dest is NULL, len is ignored, and the conversion proceeds as above, except that the converted bytes are not written out to  memory,  and
       that no length limit exists.

       In both of the above cases, if ps is NULL, a static anonymous state known only to the wcsrtombs() function is used instead.

       The programmer must ensure that there is room for at least len bytes at dest.

RETURN VALUE
       The  wcsrtombs()  function returns the number of bytes that make up the converted part of multibyte sequence, not including the terminating
       null byte.  If a wide character was encountered which could not be converted, (size_t) -1 is returned, and errno set to EILSEQ.

ATTRIBUTES
       For an explanation of the terms used in this section, see attributes(7).

       +------------+---------------+------------------------------+
       |Interface   | Attribute     | Value			   |
       +------------+---------------+------------------------------+
       |wcsrtombs() | Thread safety | MT-Unsafe race:wcsrtombs/!ps |
       +------------+---------------+------------------------------+

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

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

       Passing NULL as ps is not multithread safe.

SEE ALSO
       iconv(3), mbsinit(3), wcrtomb(3), wcsnrtombs(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
								    2017-09-15							      WCSRTOMBS(3)