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

       wcsnrtombs - convert a wide character string to a multibyte string

       #include <wchar.h>

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

       The  wcsnrtombs	function  is  like the wcsrtombs function, except that the number of wide
       characters to be converted, starting at *src, is limited to nwc.

       If dest is not a NULL pointer, the wcsnrtombs function converts at most nwc  wide  charac-
       ters  from  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  effec-
       tively  performed  by  repeatedly calling wcrtomb(dest,*src,ps), as long as this call suc-
       ceeds, and then incrementing dest by the number of bytes written and *src by one. The con-
       version 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.  nwc	wide  characters  have been converted without encountering a L'\0', or 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
       L'\0' (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
       '\0' 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 destination length limit

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

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

       The  wcsnrtombs	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

       This function is a GNU extension.

       wcsrtombs(3), iconv(3)

       The behaviour of wcsnrtombs depends on the LC_CTYPE category of the current locale.

       Passing NULL as ps is not multi-thread safe.

GNU					    1999-07-25				    WCSNRTOMBS(3)
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