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Iso8859_1.d

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00001 /*******************************************************************************
00002 
00003         @file Iso8859_1.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.Iso8859_1;
00037 
00038 private import mango.xcode.Transcoder;
00039 
00040 /*******************************************************************************
00041 
00042 *******************************************************************************/
00043 
00044 class TranscoderIso8859_1 : Transcoder
00045 {
00046         /***********************************************************************
00047 
00048         ***********************************************************************/
00049 
00050         char[] toString ()
00051         {
00052                 return "iso-8859-1";
00053         }
00054 
00055         /***********************************************************************
00056 
00057         ***********************************************************************/
00058 
00059         char[] encode (dchar[] input, char[] output, out uint consumed)
00060         {
00061                 dchar*  pIn = input;
00062                 dchar*  limit = pIn + input.length;
00063 
00064                 foreach (inout char d; output)
00065                         {
00066                         if (pIn < limit)
00067                            {
00068                            dchar b = *pIn++;
00069                          
00070                            if (b > 0xff)
00071                                fault ("invalid input while encoding");
00072 
00073                            d = cast(char) b;
00074                            }
00075                         else
00076                            break;
00077                         } 
00078         
00079                 return output [0..(consumed = pIn - &input[0])];
00080         }
00081 
00082 
00083         /***********************************************************************
00084 
00085         ***********************************************************************/
00086 
00087         dchar[] decode (char[] input, dchar[] output, out uint consumed)
00088         {
00089                 char*   pIn = input;
00090                 char*   limit = pIn + input.length;
00091 
00092                 foreach (inout dchar d; output)
00093                         {
00094                         if (pIn < limit)
00095                             d = cast(dchar) *pIn++;
00096                         else
00097                            break;
00098                         } 
00099                 
00100                 return output [0..(consumed = pIn - &input[0])];
00101         }
00102 }

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