owltech
Version:
This a backend for OwlTech Company
50 lines (48 loc) • 1.83 kB
JavaScript
/**
* Compacts this ByteBuffer to be backed by a {@link ByteBuffer#buffer} of its contents' length. Contents are the bytes
* between {@link ByteBuffer#offset} and {@link ByteBuffer#limit}. Will set `offset = 0` and `limit = capacity` and
* adapt {@link ByteBuffer#markedOffset} to the same relative position if set.
* @param {number=} begin Offset to start at, defaults to {@link ByteBuffer#offset}
* @param {number=} end Offset to end at, defaults to {@link ByteBuffer#limit}
* @returns {!ByteBuffer} this
* @expose
*/
ByteBufferPrototype.compact = function(begin, end) {
if (typeof begin === 'undefined') begin = this.offset;
if (typeof end === 'undefined') end = this.limit;
if (!this.noAssert) {
//? ASSERT_RANGE();
}
if (begin === 0 && end === /*?= CAPACITY */)
return this; // Already compacted
var len = end - begin;
if (len === 0) {
this.buffer = EMPTY_BUFFER;
//? if (!NODE)
this.view = null;
if (this.markedOffset >= 0) this.markedOffset -= begin;
this.offset = 0;
this.limit = 0;
return this;
}
//? if (NODE) {
var buffer = new Buffer(len);
this.buffer.copy(buffer, 0, begin, end);
this.buffer = buffer;
//? } else if (DATAVIEW) {
var buffer = new ArrayBuffer(len);
new Uint8Array(buffer).set(new Uint8Array(this.buffer).subarray(begin, end));
this.buffer = buffer;
this.view = new DataView(buffer);
//? } else {
var buffer = new ArrayBuffer(len);
var view = new Uint8Array(buffer);
view.set(this.view.subarray(begin, end));
this.buffer = buffer;
this.view = view;
//? }
if (this.markedOffset >= 0) this.markedOffset -= begin;
this.offset = 0;
this.limit = len;
return this;
};