fgetwc(3) — Linux manual page

fgetwc(3)               Library Functions Manual               fgetwc(3)

NAME

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

LIBRARY

       Standard C library (libc, -lc)

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

       On success, fgetwc() returns the next wide-character from the
       stream.  Otherwise, WEOF is returned, and errno is set to
       indicate the error.

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).
       ┌─────────────────────────────────────┬───────────────┬─────────┐
       │ Interface                           │ Attribute     │ Value   │
       ├─────────────────────────────────────┼───────────────┼─────────┤
       │ fgetwc(), getwc()                   │ Thread safety │ MT-Safe │
       └─────────────────────────────────────┴───────────────┴─────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C99.

NOTES

       The behavior of fgetwc() 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 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

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Linux man-pages 6.9.1          2024-05-02                      fgetwc(3)

Pages that refer to this page: fgetc(3), fgetws(3), fputwc(3), gets(3), getwchar(3), ungetwc(3)

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