Main Page | Class Hierarchy | Alphabetical List | Class List | File List | Class Members | File Members | Related Pages

EndianWriter.d

Go to the documentation of this file.
00001 /*******************************************************************************
00002 
00003         @file EndianWriter.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.EndianWriter;
00040 
00041 public  import  mango.io.Writer;
00042 
00043 private import  mango.base.ByteSwap;
00044 
00045 /*******************************************************************************
00046 
00047 *******************************************************************************/
00048 
00049 class EndianWriter : Writer
00050 {       
00051         typedef void function (void* dst, uint count) Mutator;
00052 
00053         /***********************************************************************
00054         
00055                 Construct EndianWriter upon the given IBuffer
00056 
00057         ***********************************************************************/
00058 
00059         this (IBuffer buffer)
00060         {
00061                 super (buffer);
00062 
00063                 encode.int16   = 
00064                 encode.int16u  = 
00065                 encode.char16   = &bits16;
00066 
00067                 encode.int32   = 
00068                 encode.int32u  = 
00069                 encode.float32 = 
00070                 encode.char32   = &bits32;
00071 
00072                 encode.int64   = 
00073                 encode.int64u  = 
00074                 encode.float64 = &bits64;
00075 
00076                 encode.float80 = &bits80;
00077         }
00078 
00079         /***********************************************************************
00080         
00081         ***********************************************************************/
00082 
00083         void bits16 (void* dst, uint count)
00084         {               
00085                 write (dst, count, ~1, &ByteSwap.swap16);   
00086         }
00087 
00088         /***********************************************************************
00089         
00090         ***********************************************************************/
00091 
00092         void bits32 (void* dst, uint count)
00093         {      
00094                 write (dst, count, ~3, &ByteSwap.swap32);   
00095         }
00096 
00097         /***********************************************************************
00098         
00099         ***********************************************************************/
00100 
00101         void bits64 (void* dst, uint count)
00102         {      
00103                 write (dst, count, ~7, &ByteSwap.swap64);   
00104         }
00105 
00106         /***********************************************************************
00107         
00108         ***********************************************************************/
00109 
00110         void bits80 (void* dst, uint count)
00111         {      
00112                 write (dst, count, ~15, &ByteSwap.swap80);   
00113         }
00114 
00115         /***********************************************************************
00116         
00117         ***********************************************************************/
00118 
00119         private void write (void* src, uint count, int mask, Mutator mutate)
00120         {
00121                 int writer (void[] dst)
00122                 {
00123                       // cap bytes written
00124                         uint len = dst.length & mask;
00125                         if (len > count)
00126                             len = count;
00127 
00128                         dst [0..len] = src [0..len];
00129                         mutate (dst, len);
00130                         return len;
00131                 }
00132 
00133                 while (count)
00134                       {
00135                       //flush if we used all buffer space
00136                       if (count -= buffer.write (&writer))
00137                           if (buffer.getConduit)
00138                               buffer.flush ();
00139                           else
00140                              if (! buffer.grow (count))
00141                                    throw ovf;
00142                       }                          
00143         }
00144 
00145 }
00146 

Generated on Sun Mar 6 00:30:56 2005 for Mango by doxygen 1.3.6