putwc (original) (raw)

The Open Group Base Specifications Issue 6
IEEE Std 1003.1, 2004 Edition
Copyright © 2001-2004 The IEEE and The Open Group, All Rights reserved.

A newer edition of this document exists here

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 IEEE Std 1003.1-2001 defers to the ISO C standard.

The putwc() function shall be equivalent to fputwc(), 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().

ERRORS

Refer to fputwc().

The following sections are informative.

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() should be used instead.

RATIONALE

None.

FUTURE DIRECTIONS

None.

SEE ALSO

fputwc(), the Base Definitions volume of IEEE Std 1003.1-2001, <stdio.h>, <wchar.h>

CHANGE HISTORY

First released as a World-wide Portability Interface in Issue 4.

Issue 5

Aligned with ISO/IEC 9899:1990/Amendment 1:1995 (E). Specifically, the type of argument wc is changed fromwint_t to wchar_t.

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

End of informative text.

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