The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008, 2016 Edition
Copyright © 2001-2016 The IEEE and The Open Group

#### NAME

> fputws - put a wide-character string on a stream

#### SYNOPSIS

> ``#include <stdio.h>
> #include <wchar.h>
> int fputws(const wchar_t *restrict` ws`, FILE *restrict` 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.1-2008 defers to the ISO C standard.

> The fputws() function shall write a character string corresponding to the (null-terminated) wide-character string pointed to by ws to the stream pointed to by stream. No character corresponding to the terminating null wide-character code shall be written.

> [CX] The last data modification and last file status change timestamps of the file shall be marked for update between the successful execution of fputws() and the next successful completion of a call to fflush() or fclose() on the same stream or a call to exit() or abort().

#### RETURN VALUE

> Upon successful completion, fputws() shall return a non-negative number. Otherwise, it shall return -1, set an error indicator for the stream, [CX] and set errno to indicate the error.

#### ERRORS

> Refer to fputwc.

The following sections are informative.

#### EXAMPLES

> None.

#### APPLICATION USAGE

> The fputws() function does not append a <newline>.

> This volume of POSIX.1-2008 requires that successful completion simply return a non-negative integer. There are at least three known different implementation conventions for this requirement:

> - Return a constant value.

> - Return the last character written.

> - Return the number of bytes written. Note that this implementation convention cannot be adhered to for strings longer than {INT_MAX} bytes as the value would not be representable in the return type of the function. For backwards-compatibility, implementations can return the number of bytes for strings of up to {INT_MAX} bytes, and return {INT_MAX} for all longer strings.

#### RATIONALE

> None.

#### FUTURE DIRECTIONS

> None.

#### SEE ALSO

> Standard I/O Streams, fopen

> XBD <stdio.h>, <wchar.h>

#### CHANGE HISTORY

> First released in Issue 4. Derived from the MSE working draft.

#### Issue 5

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

#### Issue 6

> Extensions beyond the ISO C standard are marked.

> The fputws() prototype is updated for alignment with the ISO/IEC 9899:1999 standard.

#### Issue 7

> Changes are made related to support for finegrained timestamps.

> POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0176 [412] and XSH/TC1-2008/0177 [14] are applied.

End of informative text.

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