vfwprintf_s.c File Reference

#include "safe_str_lib.h"

Include dependency graph for vfwprintf_s.c:

Functions
EXPORT int	vfwprintf_s (FILE *restrict stream, const wchar_t *restrict fmt, va_list ap)
	The vfwprintf_s function prints formatted output to a wide stream.

Function Documentation

vfwprintf_s()

EXPORT int vfwprintf_s	(	FILE *restrict	stream,
		const wchar_t *restrict	fmt,
		va_list	ap
	)

The vfwprintf_s function prints formatted output to a wide stream.

Note

POSIX specifies that errno is set on error. However, the safeclib extended ES* errors do not set errno, only when the underlying system vfwprintf call fails, errno is set.

Remarks

SPECIFIED IN

• C11 standard (ISO/IEC 9899:2011): K.3.9.1.6 The vfwprintf_s function (p: 632) http://en.cppreference.com/w/c/io/vfwprintf

Parameters

[in]	stream	output wide stream to write to
[in]	fmt	format-control wide string.
[in]	ap	optional arguments

Precondition

Neither stream nor fmt shall be a null pointer.

fmt shall not contain the conversion specifier n

None of the arguments corresponding to s is a null pointer (not yet)

No encoding error shall occur.

Returns

On success the total number of wide characters written is returned.

On failure a negative number is returned, and possibly errno set to EINVAL or EOVERFLOW.

Return values

-ESNULLP	when stream or fmt is a NULL pointer
-EINVAL	when fmt contains n
-1	some other error. errno: EINVAL or EOVERFLOW

See also

vfwscanf_s(), fwprintf_s()