putwc man page on Oracle

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FPUTWC(3)		   Linux Programmer's Manual		     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  fer‐
       ror(stream) becomes true, it returns WEOF.  If a wide-character conver‐
       sion 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).

       The fputwc() function returns wc if no error occurred, or WEOF to indi‐
       cate an error.  In the event of an error, errno is set to indicate  the

       Apart from the usual ones, there is

       EILSEQ Conversion of wc to the stream's encoding fails.

       C99, POSIX.1-2001.

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

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

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

       This page is part of release 3.53 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				  2013-04-19			     FPUTWC(3)

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