/
ByteBuffer.h
922 lines (844 loc) · 18.5 KB
/
ByteBuffer.h
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/**
* This code is part of MaNGOS. Contributor & Copyright details are in AUTHORS/THANKS.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* World of Warcraft, and all World of Warcraft or Warcraft art, images,
* and lore are copyrighted by Blizzard Entertainment, Inc.
*/
#ifndef _BYTEBUFFER_H
#define _BYTEBUFFER_H
#include "Common.h"
#include "Utilities/ByteConverter.h"
/**
* @brief
*
*/
class ByteBufferException
{
public:
/**
* @brief
*
* @param _add
* @param _pos
* @param _esize
* @param _size
*/
ByteBufferException(bool _add, size_t _pos, size_t _esize, size_t _size)
: add(_add), pos(_pos), esize(_esize), size(_size)
{
PrintPosError();
}
/**
* @brief
*
*/
void PrintPosError() const;
private:
bool add; /**< TODO */
size_t pos; /**< TODO */
size_t esize; /**< TODO */
size_t size; /**< TODO */
};
template<class T>
/**
* @brief
*
*/
struct Unused
{
/**
* @brief
*
*/
Unused() {}
};
/**
* @brief
*
*/
class ByteBuffer
{
public:
const static size_t DEFAULT_SIZE = 0x1000; /**< TODO */
/**
* @brief constructor
*
*/
ByteBuffer(): _rpos(0), _wpos(0)
{
_storage.reserve(DEFAULT_SIZE);
}
/**
* @brief constructor
*
* @param res
*/
ByteBuffer(size_t res): _rpos(0), _wpos(0)
{
_storage.reserve(res);
}
/**
* @brief copy constructor
*
* @param buf
*/
ByteBuffer(const ByteBuffer& buf): _rpos(buf._rpos), _wpos(buf._wpos), _storage(buf._storage) { }
/**
* @brief
*
*/
void clear()
{
_storage.clear();
_rpos = _wpos = 0;
}
/**
* @brief
*
* @param pos
* @param value
*/
template <typename T> void put(size_t pos, T value)
{
EndianConvert(value);
put(pos, (uint8*)&value, sizeof(value));
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(uint8 value)
{
append<uint8>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(uint16 value)
{
append<uint16>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(uint32 value)
{
append<uint32>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(uint64 value)
{
append<uint64>(value);
return *this;
}
/**
* @brief signed as in 2e complement
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(int8 value)
{
append<int8>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(int16 value)
{
append<int16>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(int32 value)
{
append<int32>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(int64 value)
{
append<int64>(value);
return *this;
}
/**
* @brief floating points
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(float value)
{
append<float>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(double value)
{
append<double>(value);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(const std::string& value)
{
append((uint8 const*)value.c_str(), value.length());
append((uint8)0);
return *this;
}
/**
* @brief
*
* @param str
* @return ByteBuffer &operator
*/
ByteBuffer& operator<<(const char* str)
{
append((uint8 const*)str, str ? strlen(str) : 0);
append((uint8)0);
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(bool& value)
{
value = read<char>() > 0 ? true : false;
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(uint8& value)
{
value = read<uint8>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(uint16& value)
{
value = read<uint16>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(uint32& value)
{
value = read<uint32>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(uint64& value)
{
value = read<uint64>();
return *this;
}
/**
* @brief signed as in 2e complement
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(int8& value)
{
value = read<int8>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(int16& value)
{
value = read<int16>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(int32& value)
{
value = read<int32>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(int64& value)
{
value = read<int64>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(float& value)
{
value = read<float>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(double& value)
{
value = read<double>();
return *this;
}
/**
* @brief
*
* @param value
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(std::string& value)
{
value.clear();
while (rpos() < size()) // prevent crash at wrong string format in packet
{
char c = read<char>();
if (c == 0)
{ break; }
value += c;
}
return *this;
}
template<class T>
/**
* @brief
*
* @param
* @return ByteBuffer &operator >>
*/
ByteBuffer& operator>>(Unused<T> const&)
{
read_skip<T>();
return *this;
}
/**
* @brief
*
* @param pos
* @return uint8 operator
*/
uint8 operator[](size_t pos) const
{
return read<uint8>(pos);
}
/**
* @brief
*
* @return size_t
*/
size_t rpos() const { return _rpos; }
/**
* @brief
*
* @param rpos_
* @return size_t
*/
size_t rpos(size_t rpos_)
{
_rpos = rpos_;
return _rpos;
}
/**
* @brief
*
* @return size_t
*/
size_t wpos() const { return _wpos; }
/**
* @brief
*
* @param wpos_
* @return size_t
*/
size_t wpos(size_t wpos_)
{
_wpos = wpos_;
return _wpos;
}
template<typename T>
/**
* @brief
*
*/
void read_skip() { read_skip(sizeof(T)); }
/**
* @brief
*
* @param skip
*/
void read_skip(size_t skip)
{
if (_rpos + skip > size())
{ throw ByteBufferException(false, _rpos, skip, size()); }
_rpos += skip;
}
/**
* @brief
*
* @return T
*/
template <typename T> T read()
{
T r = read<T>(_rpos);
_rpos += sizeof(T);
return r;
}
/**
* @brief
*
* @param pos
* @return T
*/
template <typename T> T read(size_t pos) const
{
if (pos + sizeof(T) > size())
{ throw ByteBufferException(false, pos, sizeof(T), size()); }
T val = *((T const*)&_storage[pos]);
EndianConvert(val);
return val;
}
/**
* @brief
*
* @param dest
* @param len
*/
void read(uint8* dest, size_t len)
{
if (_rpos + len > size())
{ throw ByteBufferException(false, _rpos, len, size()); }
memcpy(dest, &_storage[_rpos], len);
_rpos += len;
}
/**
* @brief
*
* @return uint64
*/
uint64 readPackGUID()
{
uint64 guid = 0;
uint8 guidmark = 0;
(*this) >> guidmark;
for (int i = 0; i < 8; ++i)
{
if (guidmark & (uint8(1) << i))
{
uint8 bit;
(*this) >> bit;
guid |= (uint64(bit) << (i * 8));
}
}
return guid;
}
/**
* @brief
*
* @return const uint8
*/
const uint8* contents() const { return &_storage[0]; }
/**
* @brief
*
* @return size_t
*/
size_t size() const { return _storage.size(); }
/**
* @brief
*
* @return bool
*/
bool empty() const { return _storage.empty(); }
/**
* @brief
*
* @param newsize
*/
void resize(size_t newsize)
{
_storage.resize(newsize);
_rpos = 0;
_wpos = size();
}
/**
* @brief
*
* @param ressize
*/
void reserve(size_t ressize)
{
if (ressize > size())
{ _storage.reserve(ressize); }
}
/**
* @brief
*
* @param str
*/
void append(const std::string& str)
{
append((uint8 const*)str.c_str(), str.size() + 1);
}
/**
* @brief
*
* @param src
* @param cnt
*/
void append(const char* src, size_t cnt)
{
return append((const uint8*)src, cnt);
}
/**
* @brief
*
* @param src
* @param cnt
*/
template<class T> void append(const T* src, size_t cnt)
{
return append((const uint8*)src, cnt * sizeof(T));
}
/**
* @brief
*
* @param src
* @param cnt
*/
void append(const uint8* src, size_t cnt)
{
if (!cnt)
{ return; }
MANGOS_ASSERT(size() < 10000000);
if (_storage.size() < _wpos + cnt)
{ _storage.resize(_wpos + cnt); }
memcpy(&_storage[_wpos], src, cnt);
_wpos += cnt;
}
/**
* @brief
*
* @param buffer
*/
void append(const ByteBuffer& buffer)
{
if (buffer.wpos())
{ append(buffer.contents(), buffer.wpos()); }
}
/**
* @brief can be used in SMSG_MONSTER_MOVE opcode
*
* @param x
* @param y
* @param z
*/
void appendPackXYZ(float x, float y, float z)
{
uint32 packed = 0;
packed |= ((int)(x / 0.25f) & 0x7FF);
packed |= ((int)(y / 0.25f) & 0x7FF) << 11;
packed |= ((int)(z / 0.25f) & 0x3FF) << 22;
*this << packed;
}
/**
* @brief
*
* @param guid
*/
void appendPackGUID(uint64 guid)
{
uint8 packGUID[8 + 1];
packGUID[0] = 0;
size_t size = 1;
for (uint8 i = 0; guid != 0; ++i)
{
if (guid & 0xFF)
{
packGUID[0] |= uint8(1 << i);
packGUID[size] = uint8(guid & 0xFF);
++size;
}
guid >>= 8;
}
append(packGUID, size);
}
/**
* @brief
*
* @param pos
* @param src
* @param cnt
*/
void put(size_t pos, const uint8* src, size_t cnt)
{
if (pos + cnt > size())
{ throw ByteBufferException(true, pos, cnt, size()); }
memcpy(&_storage[pos], src, cnt);
}
/**
* @brief
*
*/
void print_storage() const;
/**
* @brief
*
*/
void textlike() const;
/**
* @brief
*
*/
void hexlike() const;
private:
/**
* @brief limited for internal use because can "append" any unexpected type (like pointer and etc) with hard detection problem
*
* @param value
*/
template <typename T> void append(T value)
{
EndianConvert(value);
append((uint8*)&value, sizeof(value));
}
protected:
size_t _rpos, _wpos; /**< TODO */
std::vector<uint8> _storage; /**< TODO */
};
template <typename T>
/**
* @brief
*
* @param b
* @param v
* @return ByteBuffer &operator
*/
inline ByteBuffer& operator<<(ByteBuffer& b, std::vector<T> const& v)
{
b << (uint32)v.size();
for (typename std::vector<T>::iterator i = v.begin(); i != v.end(); ++i)
{
b << *i;
}
return b;
}
template <typename T>
/**
* @brief
*
* @param b
* @param v
* @return ByteBuffer &operator >>
*/
inline ByteBuffer& operator>>(ByteBuffer& b, std::vector<T>& v)
{
uint32 vsize;
b >> vsize;
v.clear();
while (vsize--)
{
T t;
b >> t;
v.push_back(t);
}
return b;
}
template <typename T>
/**
* @brief
*
* @param b
* @param v
* @return ByteBuffer &operator
*/
inline ByteBuffer& operator<<(ByteBuffer& b, std::list<T> const& v)
{
b << (uint32)v.size();
for (typename std::list<T>::iterator i = v.begin(); i != v.end(); ++i)
{
b << *i;
}
return b;
}
template <typename T>
/**
* @brief
*
* @param b
* @param v
* @return ByteBuffer &operator >>
*/
inline ByteBuffer& operator>>(ByteBuffer& b, std::list<T>& v)
{
uint32 vsize;
b >> vsize;
v.clear();
while (vsize--)
{
T t;
b >> t;
v.push_back(t);
}
return b;
}
template <typename K, typename V>
/**
* @brief
*
* @param b
* @param std::map<K
* @param m
* @return ByteBuffer &operator
*/
inline ByteBuffer& operator<<(ByteBuffer& b, std::map<K, V>& m)
{
b << (uint32)m.size();
for (typename std::map<K, V>::iterator i = m.begin(); i != m.end(); ++i)
{
b << i->first << i->second;
}
return b;
}
template <typename K, typename V>
/**
* @brief
*
* @param b
* @param std::map<K
* @param m
* @return ByteBuffer &operator >>
*/
inline ByteBuffer& operator>>(ByteBuffer& b, std::map<K, V>& m)
{
uint32 msize;
b >> msize;
m.clear();
while (msize--)
{
K k;
V v;
b >> k >> v;
m.insert(make_pair(k, v));
}
return b;
}
template<>
/**
* @brief
*
*/
inline void ByteBuffer::read_skip<char*>()
{
std::string temp;
*this >> temp;
}
template<>
/**
* @brief
*
*/
inline void ByteBuffer::read_skip<char const*>()
{
read_skip<char*>();
}
template<>
/**
* @brief
*
*/
inline void ByteBuffer::read_skip<std::string>()
{
read_skip<char*>();
}
#endif