vwprintf()
QNX SDP8.0C Library ReferenceAPIDeveloper
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:
| Safety: | |
|---|---|
| Cancellation point | Yes |
| Signal handler | No |
| Thread | Yes |
Page updated: