NAME

getwc — get a wide character from a stream

SYNOPSIS

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

wint_t getwc(FILE *stream);

DESCRIPTION

[CX] The functionality described on this reference page is aligned with the ISO C standard. Any conflict between the requirements described here and the ISO C standard is unintentional. This volume of IEEE Std 1003.1-2001 (“POSIX.1”) defers to the ISO C standard.

The getwc () function shall be equivalent to fgetwc(3), except that if it is implemented as a macro it may evaluate stream more than once, so the argument should never be an expression with side effects.

RETURN VALUE

Refer to fgetwc(3) .

ERRORS

Refer to fgetwc(3) .

The following sections are informative.

EXAMPLES

None.

APPLICATION USAGE

Since it may be implemented as a macro, getwc () may treat incorrectly a stream argument with side effects. In particular, getwc (* f ++) does not necessarily work as expected. Therefore, use of this function is not recommended; fgetwc(3) should be used instead.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

fgetwc(3) , the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <stdio.h>, <wchar.h>

CHANGE HISTORY

First released as a World-wide Portability Interface in Issue 4. Derived from the MSE working draft.

Issue 5

The Optional Header (OH) marking is removed from <stdio.h>.

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