getwc(3)

1FGETWC(3)                  Linux Programmer's Manual                 FGETWC(3)
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NAME

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

9       #include <stdio.h>
10       #include <wchar.h>
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12       wint_t fgetwc(FILE *stream);
13       wint_t getwc(FILE *stream);
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DESCRIPTION

16       The  fgetwc() function is the wide-character equivalent of the fgetc(3)
17       function.  It reads a wide character from stream and  returns  it.   If
18       the  end  of  stream  is reached, or if ferror(stream) becomes true, it
19       returns WEOF.  If a wide-character conversion  error  occurs,  it  sets
20       errno to EILSEQ and returns WEOF.
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22       The  getwc()  function  or macro functions identically to fgetwc().  It
23       may be implemented as a macro, and may evaluate its argument more  than
24       once.  There is no reason ever to use it.
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26       For non-locking counterparts, see unlocked_stdio(3).
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RETURN VALUE

29       The  fgetwc() function returns the next wide-character from the stream,
30       or WEOF.
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ERRORS

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

39       C99, POSIX.1-2001.
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NOTES

42       The  behavior  of fgetwc() depends on the LC_CTYPE category of the cur‐
43       rent locale.
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45       In the absence of additional information passed to the  fopen(3)  call,
46       it is reasonable to expect that fgetwc() will actually read a multibyte
47       sequence from the stream and then convert it to a wide character.
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COLOPHON

53       This page is part of release 3.22 of the Linux  man-pages  project.   A
54       description  of  the project, and information about reporting bugs, can
55       be found at http://www.kernel.org/doc/man-pages/.
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59GNU                               1999-07-25                         FGETWC(3)