00001 /******************************************************************************* 00002 00003 @file Transcoder.d 00004 00005 Copyright (C) 2004 Kris Bell 00006 00007 This software is provided 'as-is', without any express or implied 00008 warranty. In no event will the authors be held liable for damages 00009 of any kind arising from the use of this software. 00010 00011 Permission is hereby granted to anyone to use this software for any 00012 purpose, including commercial applications, and to alter it and/or 00013 redistribute it freely, subject to the following restrictions: 00014 00015 1. The origin of this software must not be misrepresented; you must 00016 not claim that you wrote the original software. If you use this 00017 software in a product, an acknowledgment within documentation of 00018 said product would be appreciated but is not required. 00019 00020 2. Altered source versions must be plainly marked as such, and must 00021 not be misrepresented as being the original software. 00022 00023 3. This notice may not be removed or altered from any distribution 00024 of the source. 00025 00026 00027 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 00028 00029 00030 @version Initial version, August 2004 00031 @author Kris 00032 00033 00034 *******************************************************************************/ 00035 00036 module mango.xcode.Transcoder; 00037 00038 /******************************************************************************* 00039 00040 *******************************************************************************/ 00041 00042 class Transcoder 00043 { 00044 /*********************************************************************** 00045 00046 Convert the input into the output, respecting the boundaries 00047 of the provided arrays. Returns a valid slice of the output, 00048 along with the number of items consumed from the input. 00049 00050 ***********************************************************************/ 00051 00052 abstract char[] encode (dchar[] input, char[] output, out uint consumed); 00053 00054 /*********************************************************************** 00055 00056 Convert the input into the output, respecting the boundaries 00057 of the provided arrays. Returns a valid slice of the output, 00058 along with the number of items consumed from the input. 00059 00060 ***********************************************************************/ 00061 00062 abstract dchar[] decode (char[] input, dchar[] output, out uint consumed); 00063 00064 /*********************************************************************** 00065 00066 Return the encoding name of this transcoder 00067 00068 ***********************************************************************/ 00069 00070 abstract char[] toString (); 00071 00072 /*********************************************************************** 00073 00074 overridable exception thrower 00075 00076 ***********************************************************************/ 00077 00078 protected void fault (char[] msg) 00079 { 00080 throw new Exception (msg); 00081 } 00082 } 00083