1 files changed, 126 insertions, 0 deletions
diff --git a/extlib/thingiview.js/binaryReader.js b/extlib/thingiview.js/binaryReader.js
new file mode 100644
index 00000000..f99a2379
--- /dev/null
+++ b/extlib/thingiview.js/binaryReader.js
@@ -0,0 +1,126 @@
+// BinaryReader
+// Refactored by Vjeux <vjeuxx@gmail.com>
+// http://blog.vjeux.com/2010/javascript/javascript-binary-reader.html
+
+// Original
+//+ Jonas Raoni Soares Silva
+//@ http://jsfromhell.com/classes/binary-parser [rev. #1]
+
+BinaryReader = function (data) {
+	this._buffer = data;
+	this._pos = 0;
+};
+
+BinaryReader.prototype = {
+
+	/* Public */
+
+	readInt8:	function (){ return this._decodeInt(8, true); },
+	readUInt8:	function (){ return this._decodeInt(8, false); },
+	readInt16:	function (){ return this._decodeInt(16, true); },
+	readUInt16:	function (){ return this._decodeInt(16, false); },
+	readInt32:	function (){ return this._decodeInt(32, true); },
+	readUInt32:	function (){ return this._decodeInt(32, false); },
+
+	readFloat:	function (){ return this._decodeFloat(23, 8); },
+	readDouble:	function (){ return this._decodeFloat(52, 11); },
+	
+	readChar:	function () { return this.readString(1); },
+	readString: function (length) {
+		this._checkSize(length * 8);
+		var result = this._buffer.substr(this._pos, length);
+		this._pos += length;
+		return result;
+	},
+
+	seek: function (pos) {
+		this._pos = pos;
+		this._checkSize(0);
+	},
+	
+	getPosition: function () {
+		return this._pos;
+	},
+	
+	getSize: function () {
+		return this._buffer.length;
+	},
+
+
+	/* Private */
+	
+	_decodeFloat: function(precisionBits, exponentBits){
+		var length = precisionBits + exponentBits + 1;
+		var size = length >> 3;
+		this._checkSize(length);
+
+		var bias = Math.pow(2, exponentBits - 1) - 1;
+		var signal = this._readBits(precisionBits + exponentBits, 1, size);
+		var exponent = this._readBits(precisionBits, exponentBits, size);
+		var significand = 0;
+		var divisor = 2;
+    // var curByte = length + (-precisionBits >> 3) - 1;
+		var curByte = 0;
+		do {
+			var byteValue = this._readByte(++curByte, size);
+			var startBit = precisionBits % 8 || 8;
+			var mask = 1 << startBit;
+			while (mask >>= 1) {
+				if (byteValue & mask) {
+					significand += 1 / divisor;
+				}
+				divisor *= 2;
+			}
+		} while (precisionBits -= startBit);
+
+		this._pos += size;
+
+		return exponent == (bias << 1) + 1 ? significand ? NaN : signal ? -Infinity : +Infinity
+			: (1 + signal * -2) * (exponent || significand ? !exponent ? Math.pow(2, -bias + 1) * significand
+			: Math.pow(2, exponent - bias) * (1 + significand) : 0);
+	},
+
+	_decodeInt: function(bits, signed){
+		var x = this._readBits(0, bits, bits / 8), max = Math.pow(2, bits);
+		var result = signed && x >= max / 2 ? x - max : x;
+
+		this._pos += bits / 8;
+		return result;
+	},
+
+	//shl fix: Henri Torgemane ~1996 (compressed by Jonas Raoni)
+	_shl: function (a, b){
+		for (++b; --b; a = ((a %= 0x7fffffff + 1) & 0x40000000) == 0x40000000 ? a * 2 : (a - 0x40000000) * 2 + 0x7fffffff + 1);
+		return a;
+	},
+	
+	_readByte: function (i, size) {
+		return this._buffer.charCodeAt(this._pos + size - i - 1) & 0xff;
+	},
+
+	_readBits: function (start, length, size) {
+		var offsetLeft = (start + length) % 8;
+		var offsetRight = start % 8;
+		var curByte = size - (start >> 3) - 1;
+		var lastByte = size + (-(start + length) >> 3);
+		var diff = curByte - lastByte;
+
+		var sum = (this._readByte(curByte, size) >> offsetRight) & ((1 << (diff ? 8 - offsetRight : length)) - 1);
+
+		if (diff && offsetLeft) {
+			sum += (this._readByte(lastByte++, size) & ((1 << offsetLeft) - 1)) << (diff-- << 3) - offsetRight; 
+		}
+
+		while (diff) {
+			sum += this._shl(this._readByte(lastByte++, size), (diff-- << 3) - offsetRight);
+		}
+
+		return sum;
+	},
+
+	_checkSize: function (neededBits) {
+		if (!(this._pos + Math.ceil(neededBits / 8) < this._buffer.length)) {
+			throw new Error("Index out of bound");
+		}
+	}
+};
+\ No newline at end of file