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   getwc    ( 3 )

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Имя (Name)

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

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Синопсис (Synopsis)

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

       wint_t fgetwc(FILE *stream);
       wint_t getwc(FILE *stream);

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Описание (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).

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Возвращаемое значение (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.

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Ошибки (Error)

Apart from the usual ones, there is

       EILSEQ The data obtained from the input stream does not form a
              valid character.

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Атрибуты (Attributes)

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

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

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Стандарты (Conforming to)

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

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Примечание (Note)

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.

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Смотри также (See also)

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

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