subset method Null safety
override
Return a InputStream to read a subset of this stream. It does not
move the read position of this stream. position
is specified relative
to the start of the buffer. If position
is not specified, the current
read position is used. If length
is not specified, the remainder of this
stream is used.
Implementation
@override
InputStreamBase subset([int? position, int? length]) {
if (position == null) {
position = offset;
} else {
position += start;
}
if (length == null || length < 0) {
length = _length - (position - start);
}
return InputStream(buffer,
byteOrder: byteOrder, start: position, length: length);
}