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three.js

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提交 7f650f24 编写于 作者: M Mr.doob
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Updated msgpack.js

上级 8325386e
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Showing with 102 addition and 56 deletion
examples/js/libs/msgpack-js.js
浏览文件 @ 7f650f24
/* jshint browser: true */
/* global define, module */
( // Module boilerplate to support browser globals and browserify and AMD.
typeof define === "function" ? function (m) { define("msgpack-js", m); } :
typeof exports === "object" ? function (m) { module.exports = m(); } :
......@@ -54,7 +56,7 @@ function utf8Write(view, offset, string) {
continue;
}
// Three bytes of UTF-8.
// Three bytes of UTF-8.
if (codePoint < 0x10000) {
view.setUint8(offset++, codePoint >>> 12 & 0x0f | 0xe0);
view.setUint8(offset++, codePoint >>> 6 & 0x3f | 0x80);
......@@ -87,7 +89,7 @@ function utf8Read(view, offset, length) {
// Two byte character
if ((byte & 0xe0) === 0xc0) {
string += String.fromCharCode(
((byte & 0x1f) << 6) |
((byte & 0x1f) << 6) |
(view.getUint8(++i) & 0x3f)
);
continue;
......@@ -143,7 +145,7 @@ function utf8ByteCount(string) {
}
exports.encode = function (value) {
var buffer = new ArrayBuffer(sizeof(value));
var buffer = new ArrayBuffer(encodedSize(value));
var view = new DataView(buffer);
encode(value, view, 0);
return buffer;
......@@ -151,14 +153,8 @@ exports.encode = function (value) {
exports.decode = decode;
// http://wiki.msgpack.org/display/MSGPACK/Format+specification
// I've extended the protocol to have two new types that were previously reserved.
// buffer 16 11011000 0xd8
// buffer 32 11011001 0xd9
// These work just like raw16 and raw32 except they are node buffers instead of strings.
//
// Also I've added a type for `undefined`
// undefined 11000100 0xc4
// https://github.com/msgpack/msgpack/blob/master/spec.md
// we reserve extension type 0x00 to encode javascript 'undefined'
function Decoder(view, offset) {
this.offset = offset || 0;
......@@ -172,13 +168,13 @@ Decoder.prototype.map = function (length) {
}
return value;
};
Decoder.prototype.buf = function (length) {
Decoder.prototype.bin = function (length) {
var value = new ArrayBuffer(length);
(new Uint8Array(value)).set(new Uint8Array(this.view.buffer, this.offset, length), 0);
this.offset += length;
return value;
};
Decoder.prototype.raw = function (length) {
Decoder.prototype.str = function (length) {
var value = utf8Read(this.view, this.offset, length);
this.offset += length;
return value;
......@@ -193,11 +189,11 @@ Decoder.prototype.array = function (length) {
Decoder.prototype.parse = function () {
var type = this.view.getUint8(this.offset);
var value, length;
// FixRaw
// FixStr
if ((type & 0xe0) === 0xa0) {
length = type & 0x1f;
this.offset++;
return this.raw(length);
return this.str(length);
}
// FixMap
if ((type & 0xf0) === 0x80) {
......@@ -222,17 +218,42 @@ Decoder.prototype.parse = function () {
this.offset++;
return value;
}
// Undefined as FixExt1
if (type === 0xd4 && this.view.getUint8(this.offset + 1) === 0x00) {
this.offset += 3;
return undefined;
}
switch (type) {
// raw 16
// str 8
case 0xd9:
length = this.view.getUint8(this.offset + 1);
this.offset += 2;
return this.str(length);
// str 16
case 0xda:
length = this.view.getUint16(this.offset + 1);
this.offset += 3;
return this.raw(length);
// raw 32
return this.str(length);
// str 32
case 0xdb:
length = this.view.getUint32(this.offset + 1);
this.offset += 5;
return this.raw(length);
return this.str(length);
// bin 8
case 0xc4:
length = this.view.getUint8(this.offset + 1);
this.offset += 2;
return this.bin(length);
// bin 16
case 0xc5:
length = this.view.getUint16(this.offset + 1);
this.offset += 3;
return this.bin(length);
// bin 32
case 0xc6:
length = this.view.getUint32(this.offset + 1);
this.offset += 5;
return this.bin(length);
// nil
case 0xc0:
this.offset++;
......@@ -245,10 +266,6 @@ Decoder.prototype.parse = function () {
case 0xc3:
this.offset++;
return true;
// undefined
case 0xc4:
this.offset++;
return undefined;
// uint8
case 0xcc:
value = this.view.getUint8(this.offset + 1);
......@@ -264,6 +281,13 @@ Decoder.prototype.parse = function () {
value = this.view.getUint32(this.offset + 1);
this.offset += 5;
return value;
// uint 64
case 0xcf:
var high = this.view.getUint32(this.offset + 1);
var low = this.view.getUint32(this.offset + 5);
value = high*0x100000000 + low;
this.offset += 9;
return value;
// int 8
case 0xd0:
value = this.view.getInt8(this.offset + 1);
......@@ -279,6 +303,13 @@ Decoder.prototype.parse = function () {
value = this.view.getInt32(this.offset + 1);
this.offset += 5;
return value;
// int 64
case 0xd3:
var high = this.view.getInt32(this.offset + 1);
var low = this.view.getUint32(this.offset + 5);
value = high*0x100000000 + low;
this.offset += 9;
return value;
// map 16
case 0xde:
length = this.view.getUint16(this.offset + 1);
......@@ -299,16 +330,6 @@ Decoder.prototype.parse = function () {
length = this.view.getUint32(this.offset + 1);
this.offset += 5;
return this.array(length);
// buffer 16
case 0xd8:
length = this.view.getUint16(this.offset + 1);
this.offset += 3;
return this.buf(length);
// buffer 32
case 0xd9:
length = this.view.getUint32(this.offset + 1);
this.offset += 5;
return this.buf(length);
// float
case 0xca:
value = this.view.getFloat32(this.offset + 1);
......@@ -336,20 +357,27 @@ function encode(value, view, offset) {
// Strings Bytes
if (type === "string") {
var length = utf8ByteCount(value);
// fix raw
// fix str
if (length < 0x20) {
view.setUint8(offset, length | 0xa0);
utf8Write(view, offset + 1, value);
return 1 + length;
}
// raw 16
// str 8
if (length < 0x100) {
view.setUint8(offset, 0xd9);
view.setUint8(offset + 1, length);
utf8Write(view, offset + 2, value);
return 2 + length;
}
// str 16
if (length < 0x10000) {
view.setUint8(offset, 0xda);
view.setUint16(offset + 1, length);
utf8Write(view, offset + 3, value);
return 3 + length;
}
// raw 32
// str 32
if (length < 0x100000000) {
view.setUint8(offset, 0xdb);
view.setUint32(offset + 1, length);
......@@ -360,22 +388,29 @@ function encode(value, view, offset) {
if (value instanceof ArrayBuffer) {
var length = value.byteLength;
// buffer 16
// bin 8
if (length < 0x100) {
view.setUint8(offset, 0xc4);
view.setUint8(offset + 1, length);
(new Uint8Array(view.buffer)).set(new Uint8Array(value), offset + 2);
return 2 + length;
}
// bin 16
if (length < 0x10000) {
view.setUint8(offset, 0xd8);
view.setUint8(offset, 0xc5);
view.setUint16(offset + 1, length);
(new Uint8Array(view.buffer)).set(new Uint8Array(value), offset + 3);
return 3 + length;
}
// buffer 32
// bin 32
if (length < 0x100000000) {
view.setUint8(offset, 0xd9);
view.setUint8(offset, 0xc6);
view.setUint32(offset + 1, length);
(new Uint8Array(view.buffer)).set(new Uint8Array(value), offset + 5);
return 5 + length;
}
}
if (type === "number") {
// Floating Point
if ((value << 0) !== value) {
......@@ -436,13 +471,15 @@ function encode(value, view, offset) {
}
throw new Error("Number too small -0x" + (-value).toString(16).substr(1));
}
// undefined
if (type === "undefined") {
view.setUint8(offset, 0xc4);
return 1;
view.setUint8(offset, 0xd4); // fixext 1
view.setUint8(offset + 1, 0); // type (undefined)
view.setUint8(offset + 2, 0); // data (ignored)
return 3;
}
// null
if (value === null) {
view.setUint8(offset, 0xc0);
......@@ -454,7 +491,7 @@ function encode(value, view, offset) {
view.setUint8(offset, value ? 0xc3 : 0xc2);
return 1;
}
// Container Types
if (type === "object") {
var length, size = 0;
......@@ -496,13 +533,13 @@ function encode(value, view, offset) {
size += encode(value[key], view, offset + size);
}
}
return size;
}
throw new Error("Unknown type " + type);
}
function sizeof(value) {
function encodedSize(value) {
var type = typeof value;
// Raw Bytes
......@@ -511,6 +548,9 @@ function sizeof(value) {
if (length < 0x20) {
return 1 + length;
}
if (length < 0x100) {
return 2 + length;
}
if (length < 0x10000) {
return 3 + length;
}
......@@ -518,9 +558,12 @@ function sizeof(value) {
return 5 + length;
}
}
if (value instanceof ArrayBuffer) {
var length = value.byteLength;
if (length < 0x100) {
return 2 + length;
}
if (length < 0x10000) {
return 3 + length;
}
......@@ -528,7 +571,7 @@ function sizeof(value) {
return 5 + length;
}
}
if (type === "number") {
// Floating Point
// double
......@@ -560,17 +603,20 @@ function sizeof(value) {
if (value >= -0x8000000000000000) return 9;
throw new Error("Number too small -0x" + value.toString(16).substr(1));
}
// Boolean, null, undefined
if (type === "boolean" || type === "undefined" || value === null) return 1;
// undefined
if (type === "undefined") return 3;
// Boolean, null
if (type === "boolean" || value === null) return 1;
// Container Types
if (type === "object") {
var length, size = 0;
if (Array.isArray(value)) {
length = value.length;
for (var i = 0; i < length; i++) {
size += sizeof(value[i]);
size += encodedSize(value[i]);
}
}
else {
......@@ -578,7 +624,7 @@ function sizeof(value) {
length = keys.length;
for (var i = 0; i < length; i++) {
var key = keys[i];
size += sizeof(key) + sizeof(value[key]);
size += encodedSize(key) + encodedSize(value[key]);
}
}
if (length < 0x10) {
......
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