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

       wcstombs - convert a wide-character string to a multibyte string

       #include <stdlib.h>

       size_t wcstombs(char *dest, const wchar_t *src, size_t n);

       If  dest	 is  not  a NULL pointer, the wcstombs() function converts the
       wide-character string src to a multibyte string starting at  dest.   At
       most n bytes are written to dest.  The conversion starts in the initial
       state.  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
       (size_t) -1 is returned.

       2. The length limit forces a stop.  In this case the  number  of	 bytes
       written to dest is returned, but the shift state at this point is lost.

       3.  The	wide-character string has been completely converted, including
       the terminating L'\0'.  In this case the conversion ends in the initial
       state.	The number of bytes written to dest, excluding the terminating
       '\0' byte, is returned.

       The programmer must ensure that there is room for at least n  bytes  at

       If  dest	 is  NULL, n 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  order  to avoid the case 2 above, the programmer should make sure n
       is greater or equal to wcstombs(NULL,src,0)+1.

       The wcstombs() 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 con‐
       verted, (size_t) -1 is returned.


       The behavior of wcstombs() depends on the LC_CTYPE category of the cur‐
       rent locale.

       The function wcsrtombs(3) provides a thread safe interface to the  same


       This  page  is  part of release 3.22 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

GNU				  1999-07-25			   WCSTOMBS(3)

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