Manpages - fputwc.3

fputwc, putwc - write a wide character to a FILE stream

  #include <stdio.h>
  #include <wchar.h>

  wint_t fputwc(wchar_t wc, FILE *stream);
  wint_t putwc(wchar_t wc, FILE *stream);

The fputwc*() function is the wide-character equivalent of the *fputc*(3) function. It writes the wide character wc to stream. If ferror(stream) becomes true, it returns *WEOF. If a wide-character conversion error occurs, it sets errno to EILSEQ and returns WEOF. Otherwise, it returns wc.

The *putwc*() function or macro functions identically to *fputwc*(). It may be implemented as a macro, and may evaluate its argument more than once. There is no reason ever to use it.

For nonlocking counterparts, see *unlocked_stdio*(3).

On success, fputwc*() function returns wc. Otherwise, *WEOF is returned, and errno is set to indicate the error.

Apart from the usual ones, there is

EILSEQ

Conversion of wc to the stream’s encoding fails.

For an explanation of the terms used in this section, see *attributes*(7).

POSIX.1-2001, POSIX.1-2008, C99.

The behavior of fputwc*() depends on the *LC_CTYPE category of the current locale.

In the absence of additional information passed to the *fopen*(3) call, it is reasonable to expect that *fputwc*() will actually write the multibyte sequence corresponding to the wide character wc.

*fgetwc*(3), *fputws*(3), *unlocked_stdio*(3)

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