An abstract interface which when implemented provides an interface to read bytes into an array buffer synchronously.
Reads up to
p.byteLength bytes into
p. It resolves to the number
of bytes read (
p.byteLength) and rejects if any error
encountered. Even if
p.byteLength, it may use
p as scratch space during the call. If some data is available
readSync() conventionally returns what is
available instead of waiting for more.
readSync() encounters end-of-file condition, it returns EOF
readSync() encounters an error, it throws with an error.
Callers should always process the
0 bytes returned before
considering the EOF (
null). Doing so correctly handles I/O errors that
happen after reading some bytes and also both of the allowed EOF
Implementations should not retain a reference to
to turn a
ReaderSync into an