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MBTOWC(3)	       FreeBSD Library Functions Manual		     MBTOWC(3)

NAME
     mbtowc -- convert a character to a	wide-character code

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <stdlib.h>

     int
     mbtowc(wchar_t * restrict wcharp, const char * restrict mbchar,
	 size_t	nbytes);

DESCRIPTION
     The mbtowc() function converts a multibyte	character mbchar into a	wide
     character according to the	current	conversion state, and stores the
     result in the object pointed to by	wcharp.	 Up to nbytes bytes are	exam-
     ined.

     A call with a null	mbchar pointer returns nonzero if the current encoding
     requires shift states, zero otherwise; if shift states are	required, the
     shift state is reset to the initial state.

RETURN VALUES
     If	mbchar is NULL,	the mbtowc() function returns nonzero if shift states
     are supported, zero otherwise.

     Otherwise,	if mbchar is not a null	pointer, mbtowc() either returns 0 if
     mbchar represents the null	wide character,	or returns the number of bytes
     processed in mbchar, or returns -1	if no multibyte	character could	be
     recognized	or converted.  In this case, mbtowc()'s	internal conversion
     state is undefined.

ERRORS
     The mbtowc() function will	fail if:

     [EILSEQ]		An invalid multibyte sequence was detected.

     [EINVAL]		The internal conversion	state is invalid.

SEE ALSO
     btowc(3), mblen(3), mbrtowc(3), mbstowcs(3), multibyte(3),	wctomb(3)

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

FreeBSD	9.3			April 11, 2004			   FreeBSD 9.3

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS

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