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

#### NAME

> vfwscanf, vswscanf, vwscanf - wide-character formatted input of a stdarg argument list

#### SYNOPSIS

> ``#include <stdarg.h>
> #include <stdio.h>
> #include <wchar.h>
> int vfwscanf(FILE *restrict` stream`, const wchar_t *restrict` format`,
> va_list` arg`);
> int vswscanf(const wchar_t *restrict` ws`, const wchar_t *restrict` format`,
> va_list` arg`);
> int vwscanf(const wchar_t *restrict` format`, va_list` arg`);
> ``

#### 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 vfwscanf(), vswscanf(), and vwscanf() functions shall be equivalent to the fwscanf(), swscanf(), and wscanf() functions, respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined in the <stdarg.h> header. These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap after the return is unspecified.

#### RETURN VALUE

> Refer to fwscanf.

#### ERRORS

> Refer to fwscanf.

The following sections are informative.

#### EXAMPLES

> None.

#### APPLICATION USAGE

> Applications using these functions should call va_end(ap) afterwards to clean up.

#### RATIONALE

> None.

#### FUTURE DIRECTIONS

> None.

#### SEE ALSO

> Standard I/O Streams, fwscanf

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

#### CHANGE HISTORY

> First released in Issue 6. Derived from the ISO/IEC 9899:1999 standard.

#### Issue 7

> POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0706 [14] is applied.

End of informative text.

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