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wcsrtombs(3)             BSD Library Functions Manual             wcsrtombs(3)


NAME

     wcsnrtombs, wcsnrtombs_l, wcsrtombs, wcsrtombs_l -- convert a wide-char-
     acter 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 corresponding 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 reading 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 num-
     ber 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

Mac OS X 10.6 - Generated Thu Sep 17 20:23:42 CDT 2009
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