tibia-client/src/framework/net/inputmessage.cpp

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/* The MIT License
*
* Copyright (c) 2010 OTClient, https://github.com/edubart/otclient
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <net/inputmessage.h>
InputMessage::InputMessage()
{
reset();
}
void InputMessage::reset()
{
m_readPos = 0;
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m_messageSize = 2;
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}
uint8 InputMessage::getU8()
{
if(!canRead(1))
return 0;
return m_buffer[m_readPos++];
}
uint16 InputMessage::getU16()
{
if(!canRead(2))
return 0;
uint16 v = *(uint16_t*)(m_buffer + m_readPos);
m_readPos += 2;
return v;
}
uint32 InputMessage::getU32()
{
if(!canRead(4))
return 0;
uint32 v = *(uint32*)(m_buffer + m_readPos);
m_readPos += 4;
return v;
}
uint64 InputMessage::getU64()
{
if(!canRead(8))
return 0;
uint64 v = *(uint64*)(m_buffer + m_readPos);
m_readPos += 8;
return v;
}
std::string InputMessage::getString()
{
uint16 stringLength = getU16();
if(!canRead(stringLength))
return std::string();
char* v = (char*)(m_buffer + m_readPos);
m_readPos += stringLength;
return std::string(v, stringLength);
}
bool InputMessage::canRead(int bytes)
{
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if((m_readPos + bytes > m_messageSize) || (m_readPos + bytes > BUFFER_MAXSIZE))
logFatal("[InputMessage::canRead()]: Cant read. Message is finished or read position has reached buffer's maximum size.");
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return true;
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}