vwprintf()

Write formatted output to standard output (varargs)

Synopsis:

#include <wchar.h>
#include <stdarg.h>

int vwprintf( const wchar_t * format, 
              va_list arg );

Arguments:

format
A wide-character string that specifies the format of the output. The formatting string determines what additional arguments you need to provide. For more information, see printf().
arg
A variable-argument list of the additional arguments, which you must have initialized with the va_start() macro.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The vwprintf() function writes output to the file stdout, under control of the argument format.

The vwprint() function is the wide-character version of vprintf(), and is a varargs version of wprintf().

Returns:

The number of characters written, or a negative value if an output error occurred (errno is set).

Classification:

ANSI, POSIX 1003.1

Safety:
Cancellation pointYes
Interrupt handlerNo
Signal handlerNo
ThreadYes

Related links

  • errno

    Global error variable

  • fprintf()

    Write output to a stream

  • fwprintf()

    Write wide-character output to a stream

  • printf()

    Write formatted output to stdout

  • snprintf()

    Write formatted output to a character array, up to a given maximum number of characters

  • sprintf()

    Print formatted output into a string

  • swprintf()

    Print formatted wide-character output into a string

  • va_start()

    Start getting items from a variable argument list

  • vfprintf()

    Write formatted output to a file (varargs)

  • vfwprintf()

    Write formatted wide-character output to a file (varargs)

  • vprintf()

    Write formatted output to standard output (varargs)

  • vsnprintf()

    Write formatted output to a character array, up to a maximum number of characters (varargs)

  • vsprintf()

    Write formatted output to a buffer (varargs)

  • vswprintf()

    Write wide-character formatted output to a buffer (varargs)

  • wprintf()

    Write formatted output to stdout