io_wrapper_vprintf — vprintf-like function that operates on an io_object pointer
ssize_t **io_wrapper_vprintf** ( | io, | |
| | format, | |
| | ap
); | |
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.
the io object
printf-style format string
variadic argument pointer
returns number of characters it attempted to write or -1 on error.