NAME
putwc — put a wide
character on a stream
SYNOPSIS
#include <stdio.h>
#include <wchar.h>
wint_t putwc(wchar_t wc, 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 POSIX.1-2017 defers to the ISO C standard.
The putwc () function shall be equivalent
to fputwc(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 fputwc(3).
ERRORS
Refer to fputwc(3).
EXAMPLES
None.
APPLICATION USAGE
Since it may be implemented as a macro,
putwc () may treat a stream
argument with side-effects incorrectly. In particular,
putwc ( wc, *
f ++) need not
work correctly. Therefore, use of this function is not recommended;
fputwc(3) should be used instead.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
CHANGE HISTORY
First released as a World-wide Portability Interface in Issue 4.
Issue 5
Aligned with ISO/IEC 9899/AMD1:1995 (“ISO C90, Amendment 1”) (E). Specifically, the type of argument wc is changed from wint_t to wchar_t.
The Optional Header (OH) marking is removed from <stdio.h>.
Issue 7
POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0478 [14] is applied.