Mercurial > projects > ldc
view tango/tango/core/ByteSwap.d @ 264:a9dae3da4e87 trunk
[svn r285] Fixed D -> bool LLVM helper for floating point values.
Changed the way D-style varargs are passed, now each param should be aligned to size_t.sizeof.
| author | lindquist |
|---|---|
| date | Sat, 14 Jun 2008 17:28:13 +0200 |
| parents | 1700239cab2e |
| children |
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/******************************************************************************* copyright: Copyright (c) 2004 Kris Bell. All rights reserved license: BSD style: $(LICENSE) version: Initial release: October 2004 version: Feb 20th 2005 - Asm version removed by Aleksey Bobnev author: Kris, Aleksey Bobnev *******************************************************************************/ module tango.core.ByteSwap; import tango.core.BitManip; /******************************************************************************* Reverse byte order for specific datum sizes. Note that the byte-swap approach avoids alignment issues, so is probably faster overall than a traditional 'shift' implementation. *******************************************************************************/ struct ByteSwap { /*********************************************************************** ***********************************************************************/ final static void swap16 (void *dst, uint bytes) { ubyte* p = cast(ubyte*) dst; while (bytes) { ubyte b = p[0]; p[0] = p[1]; p[1] = b; p += short.sizeof; bytes -= short.sizeof; } } /*********************************************************************** ***********************************************************************/ final static void swap32 (void *dst, uint bytes) { uint* p = cast(uint*) dst; while (bytes) { *p = bswap(*p); p ++; bytes -= int.sizeof; } } /*********************************************************************** ***********************************************************************/ final static void swap64 (void *dst, uint bytes) { uint* p = cast(uint*) dst; while (bytes) { uint i = p[0]; p[0] = bswap(p[1]); p[1] = bswap(i); p += (long.sizeof / int.sizeof); bytes -= long.sizeof; } } /*********************************************************************** ***********************************************************************/ final static void swap80 (void *dst, uint bytes) { ubyte* p = cast(ubyte*) dst; while (bytes) { ubyte b = p[0]; p[0] = p[9]; p[9] = b; b = p[1]; p[1] = p[8]; p[8] = b; b = p[2]; p[2] = p[7]; p[7] = b; b = p[3]; p[3] = p[6]; p[6] = b; b = p[4]; p[4] = p[5]; p[5] = b; p += real.sizeof; bytes -= real.sizeof; } } }