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// Generated by CoffeeScript 1.7.1
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(function() {
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var DecodeStream, iconv;
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try {
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iconv = require('iconv-lite');
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} catch (_error) {}
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DecodeStream = (function() {
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var key;
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function DecodeStream(buffer) {
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this.buffer = buffer;
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this.pos = 0;
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this.length = this.buffer.length;
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}
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DecodeStream.TYPES = {
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UInt8: 1,
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UInt16: 2,
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UInt24: 3,
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UInt32: 4,
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Int8: 1,
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Int16: 2,
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Int24: 3,
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Int32: 4,
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Float: 4,
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Double: 8
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};
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for (key in Buffer.prototype) {
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if (key.slice(0, 4) === 'read') {
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(function(key) {
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var bytes;
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bytes = DecodeStream.TYPES[key.replace(/read|[BL]E/g, '')];
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return DecodeStream.prototype[key] = function() {
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var ret;
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ret = this.buffer[key](this.pos);
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this.pos += bytes;
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return ret;
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};
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})(key);
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}
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}
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DecodeStream.prototype.readString = function(length, encoding) {
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var buf, byte, i, _i, _ref;
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if (encoding == null) {
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encoding = 'ascii';
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}
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switch (encoding) {
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case 'utf16le':
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case 'ucs2':
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case 'utf8':
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case 'ascii':
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return this.buffer.toString(encoding, this.pos, this.pos += length);
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case 'utf16be':
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buf = new Buffer(this.readBuffer(length));
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for (i = _i = 0, _ref = buf.length - 1; _i < _ref; i = _i += 2) {
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byte = buf[i];
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buf[i] = buf[i + 1];
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buf[i + 1] = byte;
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}
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return buf.toString('utf16le');
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default:
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buf = this.readBuffer(length);
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if (iconv) {
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try {
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return iconv.decode(buf, encoding);
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} catch (_error) {}
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}
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return buf;
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}
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};
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DecodeStream.prototype.readBuffer = function(length) {
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return this.buffer.slice(this.pos, this.pos += length);
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};
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DecodeStream.prototype.readUInt24BE = function() {
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return (this.readUInt16BE() << 8) + this.readUInt8();
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};
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DecodeStream.prototype.readUInt24LE = function() {
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return this.readUInt16LE() + (this.readUInt8() << 16);
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};
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DecodeStream.prototype.readInt24BE = function() {
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return (this.readInt16BE() << 8) + this.readUInt8();
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};
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DecodeStream.prototype.readInt24LE = function() {
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return this.readUInt16LE() + (this.readInt8() << 16);
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};
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return DecodeStream;
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})();
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module.exports = DecodeStream;
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}).call(this);
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