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nsPkgInt.h

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00001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /*  -*- C++ -*-
00003 *  Copyright (C) 1998 <developer@mozilla.org>
00004 *
00005 *
00006 *  Permission is hereby granted, free of charge, to any person obtaining
00007 *  a copy of this software and associated documentation files (the
00008 *  "Software"), to deal in the Software without restriction, including
00009 *  without limitation the rights to use, copy, modify, merge, publish,
00010 *  distribute, sublicense, and/or sell copies of the Software, and to
00011 *  permit persons to whom the Software is furnished to do so, subject to
00012 *  the following conditions:
00013 *
00014 *  The above copyright notice and this permission notice shall be included 
00015 *  in all copies or substantial portions of the Software.
00016 *
00017 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00018 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00019 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00020 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00021 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00022 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00023 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00024 */
00025 
00026 #ifndef nsPkgInt_h__
00027 #define nsPkgInt_h__
00028 
00029 namespace kencodingprober {
00030 typedef enum {
00031   eIdxSft4bits  = 3,
00032   eIdxSft8bits  = 2,
00033   eIdxSft16bits = 1
00034 } nsIdxSft; 
00035 
00036 typedef enum {
00037   eSftMsk4bits  = 7,
00038   eSftMsk8bits  = 3,
00039   eSftMsk16bits = 1
00040 } nsSftMsk; 
00041 
00042 typedef enum {
00043   eBitSft4bits  = 2,
00044   eBitSft8bits  = 3,
00045   eBitSft16bits = 4
00046 } nsBitSft; 
00047 
00048 typedef enum {
00049   eUnitMsk4bits  = 0x0000000FL,
00050   eUnitMsk8bits  = 0x000000FFL,
00051   eUnitMsk16bits = 0x0000FFFFL
00052 } nsUnitMsk; 
00053 
00054 typedef struct nsPkgInt {
00055   nsIdxSft  idxsft;
00056   nsSftMsk  sftmsk;
00057   nsBitSft  bitsft;
00058   nsUnitMsk unitmsk;
00059   unsigned int  *data;
00060 } nsPkgInt;
00061 }
00062 
00063 #define PCK16BITS(a,b)            ((unsigned int)(((b) << 16) | (a)))
00064 
00065 #define PCK8BITS(a,b,c,d)         PCK16BITS( ((unsigned int)(((b) << 8) | (a))),  \
00066                                              ((unsigned int)(((d) << 8) | (c))))
00067 
00068 #define PCK4BITS(a,b,c,d,e,f,g,h) PCK8BITS(  ((unsigned int)(((b) << 4) | (a))), \
00069                                              ((unsigned int)(((d) << 4) | (c))), \
00070                                              ((unsigned int)(((f) << 4) | (e))), \
00071                                              ((unsigned int)(((h) << 4) | (g))) )
00072 
00073 #define GETFROMPCK(i, c) \
00074  (((((c).data)[(i)>>(c).idxsft])>>(((i)&(c).sftmsk)<<(c).bitsft))&(c).unitmsk)
00075 
00076 #endif /* nsPkgInt_h__ */
00077 

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