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Diffstat (limited to 'mojo/public/js/buffer.js')
-rw-r--r-- | mojo/public/js/buffer.js | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/mojo/public/js/buffer.js b/mojo/public/js/buffer.js deleted file mode 100644 index e35f695..0000000 --- a/mojo/public/js/buffer.js +++ /dev/null @@ -1,156 +0,0 @@ -// Copyright 2014 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -define("mojo/public/js/buffer", function() { - - var kHostIsLittleEndian = (function () { - var endianArrayBuffer = new ArrayBuffer(2); - var endianUint8Array = new Uint8Array(endianArrayBuffer); - var endianUint16Array = new Uint16Array(endianArrayBuffer); - endianUint16Array[0] = 1; - return endianUint8Array[0] == 1; - })(); - - var kHighWordMultiplier = 0x100000000; - - function Buffer(sizeOrArrayBuffer) { - if (sizeOrArrayBuffer instanceof ArrayBuffer) - this.arrayBuffer = sizeOrArrayBuffer; - else - this.arrayBuffer = new ArrayBuffer(sizeOrArrayBuffer); - - this.dataView = new DataView(this.arrayBuffer); - this.next = 0; - } - - Object.defineProperty(Buffer.prototype, "byteLength", { - get: function() { return this.arrayBuffer.byteLength; } - }); - - Buffer.prototype.alloc = function(size) { - var pointer = this.next; - this.next += size; - if (this.next > this.byteLength) { - var newSize = (1.5 * (this.byteLength + size)) | 0; - this.grow(newSize); - } - return pointer; - }; - - function copyArrayBuffer(dstArrayBuffer, srcArrayBuffer) { - (new Uint8Array(dstArrayBuffer)).set(new Uint8Array(srcArrayBuffer)); - } - - Buffer.prototype.grow = function(size) { - var newArrayBuffer = new ArrayBuffer(size); - copyArrayBuffer(newArrayBuffer, this.arrayBuffer); - this.arrayBuffer = newArrayBuffer; - this.dataView = new DataView(this.arrayBuffer); - }; - - Buffer.prototype.trim = function() { - this.arrayBuffer = this.arrayBuffer.slice(0, this.next); - this.dataView = new DataView(this.arrayBuffer); - }; - - Buffer.prototype.getUint8 = function(offset) { - return this.dataView.getUint8(offset); - } - Buffer.prototype.getUint16 = function(offset) { - return this.dataView.getUint16(offset, kHostIsLittleEndian); - } - Buffer.prototype.getUint32 = function(offset) { - return this.dataView.getUint32(offset, kHostIsLittleEndian); - } - Buffer.prototype.getUint64 = function(offset) { - var lo, hi; - if (kHostIsLittleEndian) { - lo = this.dataView.getUint32(offset, kHostIsLittleEndian); - hi = this.dataView.getUint32(offset + 4, kHostIsLittleEndian); - } else { - hi = this.dataView.getUint32(offset, kHostIsLittleEndian); - lo = this.dataView.getUint32(offset + 4, kHostIsLittleEndian); - } - return lo + hi * kHighWordMultiplier; - } - - Buffer.prototype.getInt8 = function(offset) { - return this.dataView.getInt8(offset); - } - Buffer.prototype.getInt16 = function(offset) { - return this.dataView.getInt16(offset, kHostIsLittleEndian); - } - Buffer.prototype.getInt32 = function(offset) { - return this.dataView.getInt32(offset, kHostIsLittleEndian); - } - Buffer.prototype.getInt64 = function(offset) { - var lo, hi; - if (kHostIsLittleEndian) { - lo = this.dataView.getUint32(offset, kHostIsLittleEndian); - hi = this.dataView.getInt32(offset + 4, kHostIsLittleEndian); - } else { - hi = this.dataView.getInt32(offset, kHostIsLittleEndian); - lo = this.dataView.getUint32(offset + 4, kHostIsLittleEndian); - } - return lo + hi * kHighWordMultiplier; - } - - Buffer.prototype.getFloat32 = function(offset) { - return this.dataView.getFloat32(offset, kHostIsLittleEndian); - } - Buffer.prototype.getFloat64 = function(offset) { - return this.dataView.getFloat64(offset, kHostIsLittleEndian); - } - - Buffer.prototype.setUint8 = function(offset, value) { - this.dataView.setUint8(offset, value); - } - Buffer.prototype.setUint16 = function(offset, value) { - this.dataView.setUint16(offset, value, kHostIsLittleEndian); - } - Buffer.prototype.setUint32 = function(offset, value) { - this.dataView.setUint32(offset, value, kHostIsLittleEndian); - } - Buffer.prototype.setUint64 = function(offset, value) { - var hi = (value / kHighWordMultiplier) | 0; - if (kHostIsLittleEndian) { - this.dataView.setInt32(offset, value, kHostIsLittleEndian); - this.dataView.setInt32(offset + 4, hi, kHostIsLittleEndian); - } else { - this.dataView.setInt32(offset, hi, kHostIsLittleEndian); - this.dataView.setInt32(offset + 4, value, kHostIsLittleEndian); - } - } - - Buffer.prototype.setInt8 = function(offset, value) { - this.dataView.setInt8(offset, value); - } - Buffer.prototype.setInt16 = function(offset, value) { - this.dataView.setInt16(offset, value, kHostIsLittleEndian); - } - Buffer.prototype.setInt32 = function(offset, value) { - this.dataView.setInt32(offset, value, kHostIsLittleEndian); - } - Buffer.prototype.setInt64 = function(offset, value) { - var hi = Math.floor(value / kHighWordMultiplier); - if (kHostIsLittleEndian) { - this.dataView.setInt32(offset, value, kHostIsLittleEndian); - this.dataView.setInt32(offset + 4, hi, kHostIsLittleEndian); - } else { - this.dataView.setInt32(offset, hi, kHostIsLittleEndian); - this.dataView.setInt32(offset + 4, value, kHostIsLittleEndian); - } - } - - Buffer.prototype.setFloat32 = function(offset, value) { - this.dataView.setFloat32(offset, value, kHostIsLittleEndian); - } - Buffer.prototype.setFloat64 = function(offset, value) { - this.dataView.setFloat64(offset, value, kHostIsLittleEndian); - } - - var exports = {}; - exports.Buffer = Buffer; - return exports; -}); |