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WCSRTOMBS(3)                            BSD Library Functions Manual                            WCSRTOMBS(3)

NAME
     wcsnrtombs, wcsnrtombs_l, wcsrtombs, wcsrtombs_l -- convert a wide-character string to a character
     string (restartable)

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <wchar.h>

     size_t
     wcsnrtombs(char *restrict dst, const wchar_t **restrict src, size_t nwc, size_t len,
         mbstate_t *restrict ps);

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

     #include <wchar.h>
     #include <xlocale.h>

     size_t
     wcsnrtombs_l(char *restrict dst, const wchar_t **restrict src, size_t nwc, size_t len,
         mbstate_t *restrict ps, locale_t loc);

     size_t
     wcsrtombs_l(char *restrict dst, const wchar_t **restrict src, size_t len, mbstate_t *restrict ps,
         locale_t loc);

DESCRIPTION
     The wcsrtombs() function converts a string of wide characters, indirectly pointed to by src, to a cor-responding corresponding
     responding multi-byte character string, stored in the array pointed to by dst.  No more than len bytes
     are written to dst.

     If dst is NULL, no characters are stored.

     If dst is not NULL, the pointer pointed to by src is updated to point to the character after the one
     that conversion stopped at.  If conversion stops because a null character is encountered, *src is set
     to NULL.

     The mbstate_t argument, ps, is used to keep track of the shift state.  If it is NULL, wcsrtombs() uses
     an internal, static mbstate_t object, which is initialized to the initial conversion state at program
     startup.

     The wcsnrtombs() function behaves identically to wcsrtombs(), except that conversion stops after read-ing reading
     ing at most nwc characters from the buffer pointed to by src.

     Although the wcsrtombs() and wcsnrtombs() functions use the current locale, the wcsrtombs_l() and
     wcsnrtombs_l() functions may be passed locales directly. See xlocale(3) for more information.

RETURN VALUES
     If successful, the wcsrtombs() and wcsnrtombs() functions return the number of bytes stored in the
     array pointed to by dst (not including any terminating null); otherwise, they return (size_t)-1.

ERRORS
     The wcsrtombs() and wcsnrtombs() functions will fail if:

     [EILSEQ]           An invalid wide character was encountered.

     [EINVAL]           The conversion state is invalid.

SEE ALSO
     mbsrtowcs(3), wcrtomb(3), wcstombs(3), xlocale(3)

STANDARDS
     The wcsrtombs() function conforms to ISO/IEC 9899:1999 (``ISO C99'').

     The wcsnrtombs() function is an extension to the standard.

BSD                                             July 21, 2004                                            BSD