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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 
00027                         ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
00028 
00029 
00030         @version        Initial version, March 2004      
00031         @author         Kris
00032 
00033 
00034 *******************************************************************************/
00035 
00036 module mango.io.EndianReader;
00037 
00038 public  import  mango.io.Reader;
00039 
00040 private import  mango.base.ByteSwap;
00041 
00042 /*******************************************************************************
00043 
00044         A pair of classes to handle byte-swapping for integral types. The
00045         basic EndianReader is transparent, whilst EndianReaderSwap is not.
00046         
00047         Use the static create() method to construct the appropriate reader.
00048 
00049 *******************************************************************************/
00050 
00051 class EndianReader : Reader
00052 {       
00053         /***********************************************************************
00054         
00055                 Construct EndianReader upon the given IBuffer. 
00056 
00057         ***********************************************************************/
00058 
00059         this (IBuffer buffer)
00060         {
00061                 super (buffer); 
00062 
00063                 numeric.int16   = 
00064                 numeric.int16u  = 
00065                 string.char16   = &bits16;
00066 
00067                 numeric.int32   = 
00068                 numeric.int32u  = 
00069                 numeric.float32 = 
00070                 string.char32   = &bits32;
00071 
00072                 numeric.int64   = 
00073                 numeric.int64u  = 
00074                 numeric.float64 = &bits64;
00075 
00076                 numeric.float80 = &bits80;
00077         }
00078 
00079         /***********************************************************************
00080         
00081         ***********************************************************************/
00082         
00083         override char[] toString()
00084         {
00085                 return "endian reader";
00086         }
00087 
00088         /***********************************************************************
00089         
00090         ***********************************************************************/
00091 
00092         final void bits16 (void* dst, uint count)
00093         {               
00094                 read (dst, count);         
00095                 ByteSwap.swap16 (dst, count);      
00096         }
00097 
00098         /***********************************************************************
00099         
00100         ***********************************************************************/
00101 
00102         final void bits32 (void* dst, uint count)
00103         {      
00104                 read (dst, count);   
00105                 ByteSwap.swap32 (dst, count);      
00106         }
00107 
00108         /***********************************************************************
00109         
00110         ***********************************************************************/
00111 
00112         final void bits64 (void* dst, uint count)
00113         {      
00114                 read (dst, count);   
00115                 ByteSwap.swap64 (dst, count);      
00116         }
00117 
00118         /***********************************************************************
00119         
00120         ***********************************************************************/
00121 
00122         final void bits80 (void* dst, uint count)
00123         {      
00124                 read (dst, count);   
00125                 ByteSwap.swap80 (dst, count);      
00126         }
00127 }

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