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NetBSD 6.1.5 - man page for wctomb (netbsd section 3)

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WCTOMB(3)			   BSD Library Functions Manual 			WCTOMB(3)

NAME
     wctomb -- converts a wide character to a multibyte character

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <stdlib.h>

     int
     wctomb(char * s, const wchar_t wchar);

DESCRIPTION
     The wctomb() converts the wide character wchar to the corresponding multibyte character, and
     stores it in the array pointed to by s.  wctomb() may store at most MB_CUR_MAX bytes in the
     array.

     In state-dependent encoding, wctomb() may store the special sequence to change the conver-
     sion state before an actual multibyte character into the array pointed to by s.  If wchar is
     a nul wide character ('\0'), this function sets its own internal state to an initial conver-
     sion state.

     Calling any other functions in Standard C Library (libc, -lc) never changes the internal
     state of wctomb(), except changing the LC_CTYPE category of the current locale by calling
     setlocale(3).  Such setlocale(3) calls cause the internal state of this function to be inde-
     terminate.

     The behaviour of wctomb() is affected by the LC_CTYPE category of the current locale.

     There is one special case:

     s == NULL	   wctomb() initializes its own internal state to an initial state, and deter-
		   mines whether the current encoding is state-dependent.  This function returns
		   0 if the encoding is state-independent, otherwise non-zero.	In this case,
		   wchar is completely ignored.

RETURN VALUES
     Normally, wctomb() returns:

     positive	   Number of bytes for the valid multibyte character pointed to by s.  There are
		   no cases that the value returned is greater than n or the value of the
		   MB_CUR_MAX macro.

     -1 	   wchar is an invalid wide character.

     If s is equal to NULL, mbtowc() returns:

     0		 The current encoding is state-independent.

     non-zero	 The current encoding is state-dependent.

ERRORS
     No errors are defined.

SEE ALSO
     setlocale(3)

STANDARDS
     The wctomb() function conforms to ANSI X3.159-1989 (``ANSI C89'').

BSD					 February 3, 2002				      BSD
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