src/shared/ByteBuffer.cpp

   1 /*
   2  * Copyright (C) 2005-2013 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "ByteBuffer.h"
  20
  21 void BitStream::Clear()
  22 {
  23     _data.clear();
  24     _rpos = _wpos = 0;
  25 }
  26
  27 uint8 BitStream::GetBit(uint32 bit)
  28 {
  29     MANGOS_ASSERT(_data.size() > bit);
  30     return _data[bit];
  31 }
  32
  33 uint8 BitStream::ReadBit()
  34 {
  35     MANGOS_ASSERT(_data.size() < _rpos);
  36     uint8 b = _data[_rpos];
  37     ++_rpos;
  38     return b;
  39 }
  40
  41 void BitStream::WriteBit(uint32 bit)
  42 {
  43     _data.push_back(bit ? uint8(1) : uint8(0));
  44     ++_wpos;
  45 }
  46
  47 template <typename T> void BitStream::WriteBits(T value, size_t bits)
  48 {
  49     for (int32 i = bits-1; i >= 0; --i)
  50         WriteBit((value >> i) & 1);
  51 }
  52
  53 bool BitStream::Empty()
  54 {
  55     return _data.empty();
  56 }
  57
  58 void BitStream::Reverse()
  59 {
  60     uint32 len = GetLength();
  61     std::vector<uint8> b = _data;
  62     Clear();
  63
  64     for(uint32 i = len; i > 0; --i)
  65         WriteBit(b[i-1]);
  66 }
  67
  68 void BitStream::Print()
  69 {
  70     std::stringstream ss;
  71     ss << "BitStream: ";
  72     for (uint32 i = 0; i < GetLength(); ++i)
  73         ss << uint32(GetBit(i)) << " ";
  74
  75     sLog.outDebug(ss.str().c_str());
  76 }
  77