io_wrapper_vprintf

March 26, 2020

Name

io_wrapper_vprintf — vprintf-like function that operates on an io_object pointer

Synopsis

#include "io_wrapper.h"

| ssize_t **io_wrapper_vprintf** ( | io, |   |
|   | format, |   |
|   | ap); |   |

io_object * <var class="pdparam">io</var>;
const char * <var class="pdparam">format</var>;
va_list <var class="pdparam">ap</var>;

Description

Note

This reference page was automatically generated from functions found in the header files in the development branch. The function described here may not exist in generally available versions of Momentum, and may change in behavior when it is generally available. Consult your vendor for definitive advice on the use of this function.

vprintf-like function that operates on an io_object pointer.

Parameters

io

the io object

format

printf-style format string

ap

variadic argument pointer

Return Values

returns number of characters it attempted to write or -1 on error.