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man:getwc

FGETWC(3) Linux Programmer's Manual FGETWC(3)

NAME

     fgetwc, getwc - read a wide character from a FILE stream

SYNOPSIS

     #include <stdio.h>
     #include <wchar.h>
     wint_t fgetwc(FILE *stream);
     wint_t getwc(FILE *stream);

DESCRIPTION

     The  fgetwc() function is the wide-character equivalent of the fgetc(3)
     function.  It reads a wide character from stream and  returns  it.   If
     the  end  of  stream  is reached, or if ferror(stream) becomes true, it
     returns WEOF.  If a wide-character conversion  error  occurs,  it  sets
     errno to EILSEQ and returns WEOF.
     The  getwc()  function  or macro functions identically to fgetwc().  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).

RETURN VALUE

     The  fgetwc() function returns the next wide-character from the stream,
     or WEOF.  In the event of an error, errno is set to indicate the cause.

ERRORS

     Apart from the usual ones, there is
     EILSEQ The  data  obtained  from the input stream does not form a valid
            character.

ATTRIBUTES

     For  an  explanation  of  the  terms  used   in   this   section,   see
     attributes(7).
     allbox;  lbw17  lb  lb  l  l l.  Interface Attribute Value T{ fgetwc(),
     getwc() T}   Thread safety  MT-Safe

CONFORMING TO

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

NOTES

     The behavior of fgetwc() 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 fgetwc() will actually read a multibyte
     sequence from the stream and then convert it to a wide character.

SEE ALSO

     fgetws(3), fputwc(3), ungetwc(3), unlocked_stdio(3)

COLOPHON

     This  page  is  part of release 4.16 of the Linux man-pages project.  A
     description of the project, information about reporting bugs,  and  the
     latest     version     of     this    page,    can    be    found    at
     https://www.kernel.org/doc/man-pages/.

GNU 2015-08-08 FGETWC(3)

/data/webs/external/dokuwiki/data/pages/man/getwc.txt · Last modified: 2019/05/17 09:32 by 127.0.0.1

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