next wide character from input stream
() function obtains the next input wide
character (if present) from the stream pointed at by
, or the next character pushed back on
the stream via ungetwc(3)
() function acts essentially identically
(), but is a macro that expands in-line.
() function is equivalent to
() with the argument stdin.
If successful, these routines return the next wide character from the
. If the stream is at end-of-file or a
read error occurs, the routines return
. The routines
must be used to
distinguish between end-of-file and error. If an error occurs, the global
is set to indicate the error.
The end-of-file condition is remembered, even on a terminal, and all
subsequent attempts to read will return
until the condition is cleared with
() functions conform to