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EndianReader.d

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00001 /*******************************************************************************
00002 
00003         @file EndianReader.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         4. Derivative works are permitted, but they must carry this notice
00027            in full and credit the original source.
00028 
00029 
00030                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00031 
00032 
00033         @version        Initial version, March 2004      
00034         @author         Kris
00035 
00036 
00037 *******************************************************************************/
00038 
00039 module mango.io.EndianReader;
00040 
00041 public  import  mango.io.Reader;
00042 
00043 private import  mango.base.ByteSwap;
00044 
00045 /*******************************************************************************
00046 
00047         A pair of classes to handle byte-swapping for integral types. The
00048         basic EndianReader is transparent, whilst EndianReaderSwap is not.
00049         
00050         Use the static create() method to construct the appropriate reader.
00051 
00052 *******************************************************************************/
00053 
00054 class EndianReader : Reader
00055 {       
00056         /***********************************************************************
00057         
00058                 Construct EndianReader upon the given IBuffer. 
00059 
00060         ***********************************************************************/
00061 
00062         this (IBuffer buffer)
00063         {
00064                 super (buffer); 
00065 
00066                 decode.int16   = 
00067                 decode.int16u  = 
00068                 decode.char16   = &bits16;
00069 
00070                 decode.int32   = 
00071                 decode.int32u  = 
00072                 decode.float32 = 
00073                 decode.char32   = &bits32;
00074 
00075                 decode.int64   = 
00076                 decode.int64u  = 
00077                 decode.float64 = &bits64;
00078 
00079                 decode.float80 = &bits80;
00080         }
00081 
00082         /***********************************************************************
00083         
00084         ***********************************************************************/
00085 
00086         final uint bits16 (void* dst, uint count)
00087         {               
00088                 read (dst, count);         
00089                 ByteSwap.swap16 (dst, count);    
00090                 return count;  
00091         }
00092 
00093         /***********************************************************************
00094         
00095         ***********************************************************************/
00096 
00097         final uint bits32 (void* dst, uint count)
00098         {      
00099                 read (dst, count);   
00100                 ByteSwap.swap32 (dst, count);      
00101                 return count;  
00102         }
00103 
00104         /***********************************************************************
00105         
00106         ***********************************************************************/
00107 
00108         final uint bits64 (void* dst, uint count)
00109         {      
00110                 read (dst, count);   
00111                 ByteSwap.swap64 (dst, count);      
00112                 return count;  
00113         }
00114 
00115         /***********************************************************************
00116         
00117         ***********************************************************************/
00118 
00119         final uint bits80 (void* dst, uint count)
00120         {      
00121                 read (dst, count);   
00122                 ByteSwap.swap80 (dst, count);      
00123                 return count;  
00124         }
00125 }

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