/*
 * Copyright (c) 2010-2011 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 <framework/net/outputmessage.h>

OutputMessage::OutputMessage()
{
    reset();
}

void OutputMessage::reset()
{
    m_writePos = DATA_POS;
    m_messageSize = 0;
}

void OutputMessage::addU8(uint8 value)
{
    checkWrite(1);
    m_buffer[m_writePos] = value;
    m_writePos += 1;
    m_messageSize += 1;
}

void OutputMessage::addU16(uint16 value)
{
    checkWrite(2);
    *(uint16_t*)(m_buffer + m_writePos) = value;
    m_writePos += 2;
    m_messageSize += 2;
}

void OutputMessage::addU32(uint32 value)
{
    checkWrite(4);
    *(uint32*)(m_buffer + m_writePos) = value;
    m_writePos += 4;
    m_messageSize += 4;
}

void OutputMessage::addU64(uint64 value)
{
    checkWrite(8);
    *(uint64*)(m_buffer + m_writePos) = value;
    m_writePos += 8;
    m_messageSize += 8;
}

void OutputMessage::addString(const char* value)
{
    size_t stringLength = strlen(value);
    if(stringLength > 65535)
        throw NetworkException("[OutputMessage::addString] string length > 65535");
    checkWrite(stringLength + 2);
    addU16(stringLength);
    strcpy((char*)(m_buffer + m_writePos), value);
    m_writePos += stringLength;
    m_messageSize += stringLength;
}

void OutputMessage::addString(const std::string &value)
{
    addString(value.c_str());
}

void OutputMessage::addPaddingBytes(int bytes, uint8 byte)
{
    if(bytes <= 0)
        return;
    checkWrite(bytes);
    memset((void*)&m_buffer[m_writePos], byte, bytes);
    m_writePos += bytes;
    m_messageSize += bytes;
}

bool OutputMessage::canWrite(int bytes)
{
    if(m_writePos + bytes > BUFFER_MAXSIZE)
        return false;
    return true;
}

void OutputMessage::checkWrite(int bytes)
{
    if(!canWrite(bytes))
        throw NetworkException("OutputMessage max buffer size reached");
}
