.

qwen/nodejs/node_modules/wkx/lib/binarywriter.js

@@ -0,0 +1,65 @@
+module.exports = BinaryWriter;
+
+function BinaryWriter(size, allowResize) {
+    this.buffer = new Buffer(size);
+    this.position = 0;
+    this.allowResize = allowResize;
+}
+
+function _write(write, size) {
+    return function (value, noAssert) {
+        this.ensureSize(size);
+
+        write.call(this.buffer, value, this.position, noAssert);
+        this.position += size;
+    };
+}
+
+BinaryWriter.prototype.writeUInt8 = _write(Buffer.prototype.writeUInt8, 1);
+BinaryWriter.prototype.writeUInt16LE = _write(Buffer.prototype.writeUInt16LE, 2);
+BinaryWriter.prototype.writeUInt16BE = _write(Buffer.prototype.writeUInt16BE, 2);
+BinaryWriter.prototype.writeUInt32LE = _write(Buffer.prototype.writeUInt32LE, 4);
+BinaryWriter.prototype.writeUInt32BE = _write(Buffer.prototype.writeUInt32BE, 4);
+BinaryWriter.prototype.writeInt8 = _write(Buffer.prototype.writeInt8, 1);
+BinaryWriter.prototype.writeInt16LE = _write(Buffer.prototype.writeInt16LE, 2);
+BinaryWriter.prototype.writeInt16BE = _write(Buffer.prototype.writeInt16BE, 2);
+BinaryWriter.prototype.writeInt32LE = _write(Buffer.prototype.writeInt32LE, 4);
+BinaryWriter.prototype.writeInt32BE = _write(Buffer.prototype.writeInt32BE, 4);
+BinaryWriter.prototype.writeFloatLE = _write(Buffer.prototype.writeFloatLE, 4);
+BinaryWriter.prototype.writeFloatBE = _write(Buffer.prototype.writeFloatBE, 4);
+BinaryWriter.prototype.writeDoubleLE = _write(Buffer.prototype.writeDoubleLE, 8);
+BinaryWriter.prototype.writeDoubleBE = _write(Buffer.prototype.writeDoubleBE, 8);
+
+BinaryWriter.prototype.writeBuffer = function (buffer) {
+    this.ensureSize(buffer.length);
+
+    buffer.copy(this.buffer, this.position, 0, buffer.length);
+    this.position += buffer.length;
+};
+
+BinaryWriter.prototype.writeVarInt = function (value) {
+    var length = 1;
+
+    while ((value & 0xFFFFFF80) !== 0) {
+        this.writeUInt8((value & 0x7F) | 0x80);
+        value >>>= 7;
+        length++;
+    }
+
+    this.writeUInt8(value & 0x7F);
+
+    return length;
+};
+
+BinaryWriter.prototype.ensureSize = function (size) {
+    if (this.buffer.length < this.position + size) {
+        if (this.allowResize) {
+            var tempBuffer = new Buffer(this.position + size);
+            this.buffer.copy(tempBuffer, 0, 0, this.buffer.length);
+            this.buffer = tempBuffer;
+        }
+        else {
+            throw new RangeError('index out of range');
+        }
+    }
+};