1 jls.loader.provide('jls.io.cs.SingleByteDecoder');
  2 
  3 jls.loader.require('jls.lang.CharBuffer');
  4 
  5 jls.io.cs.SingleByteDecoder = jls.lang.Class.create( /** @lends jls.io.cs.SingleByteDecoder.prototype */
  6 {
  7     /**
  8      * Creates a character decoder.
  9      * 
 10      * @constructs
 11      * @class This class represents a single byte character set decoder.
 12      */
 13     initialize : function(charset, mapping) {
 14         this._charset = charset;
 15         this._mapping = mapping;
 16         this._averBytes = 1.0;
 17         this._replacement = '?'.charCodeAt(0);
 18     },
 19     /**
 20      * Decodes byte buffer and returns the character buffer.
 21      *
 22      * @param {jls.lang.Buffer} input The buffer to decode.
 23      * @returns {jls.lang.CharBuffer} The decoded character buffer.
 24      */
 25     decode : function(input, buffer) {
 26     	var length = Math.round(input.remaining() / this._averBytes);
 27     	var output = buffer || jls.lang.CharBuffer.allocate(length + 1);
 28     	while (input.remaining() > 0) {
 29     		var b = input.getByte();
 30     		var c;
 31     		if (b in this._mapping) {
 32     			c = this._mapping[b];
 33     		} else {
 34     			c = this._replacement;
 35     		}
 36     		output.putChar(c);
 37     	}
 38         return output;
 39     }
 40 });
 41 
 42