vfwprintf, vswprintf, vwprintf - wide-character formatted output of a stdarg argument list
#include <stdarg.h>
#include <stdio.h>
#include <wchar.h>
int vfwprintf(FILE *restrict stream, const wchar_t *restrict format,
va_list arg);
int vswprintf(wchar_t *restrict ws, size_t n,
const wchar_t *restrict format, va_list arg);
int vwprintf(const wchar_t *restrict format, va_list arg);
[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 vfwprintf(), vswprintf(), and vwprintf() functions shall be equivalent to fwprintf(), swprintf(), and wprintf() respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined by <stdarg.h>.
These functions shall not invoke the va_end macro. However, as these functions do invoke the va_arg macro, the value of ap after the return is unspecified.
Refer to fwprintf.
Refer to fwprintf.
None.
Applications using these functions should call va_end(ap) afterwards to clean up.
None.
None.
Standard I/O Streams, fwprintf
XBD <stdarg.h>, <stdio.h>, <wchar.h>
First released in Issue 5. Included for alignment with ISO/IEC 9899:1990/Amendment 1:1995 (E).
The vfwprintf(), vswprintf(), and vwprintf() prototypes are updated for alignment with the ISO/IEC 9899:1999 standard.
POSIX.1-2008, Technical Corrigendum 1, XSH/TC1-2008/0705 [14] is applied.
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