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Man Pages


Manual Reference Pages  -  MBTOWC (3)

NAME

mbtowc - convert a character to a wide-character code

CONTENTS

Library
Synopsis
Description
Return Values
Errors
See Also
Standards

LIBRARY


.Lb libc

SYNOPSIS


.In stdlib.h int
.Fo mbtowc wchar_t * restrict wcharp const char * restrict mbchar size_t nbytes
.Fc

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 examined.

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 -isoC-99.
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