buffer.cpp

#include "Buffer.h"

Buffer::Buffer(long long _size)
{
    if(_size > 0)
    {
        size = _size;
        buffer = new unsigned char[size];
    }
}
Buffer::~Buffer()
{
    if(size > 0)
        delete[] buffer;
}

long long Buffer::Size() { return size; }
long long Buffer::Read() { return read; }
long long Buffer::Written() { return written; }
long long Buffer::RemainingSpace() { return size - written; }
long long Buffer::RemainingData() { return written - read; }
void Buffer::Reset() { read = written = 0; }
unsigned char* Buffer::GetArray() { return buffer; }

bool Buffer::tryWriteFloat(float val)
{
    if(RemainingSpace() < 4) return false;
    register unsigned char* bytes = (unsigned char*)&val;
    buffer[written    ] = bytes[3];
    buffer[written + 1] = bytes[2];
    buffer[written + 2] = bytes[1];
    buffer[written + 3] = bytes[0];
    written += 4;
    return true;
}
bool Buffer::tryWriteDouble(double val)
{
    if(RemainingSpace() < 8) return false;
    register unsigned char* bytes = (unsigned char*)&val;
    buffer[written    ] = bytes[7];
    buffer[written + 1] = bytes[6];
    buffer[written + 2] = bytes[5];
    buffer[written + 3] = bytes[4];
    buffer[written + 4] = bytes[3];
    buffer[written + 5] = bytes[2];
    buffer[written + 6] = bytes[1];
    buffer[written + 7] = bytes[0];
    written += 8;
    return true;
}

bool Buffer::tryReadFloat(float& val)
{
    if(RemainingData() < 4) return false;
    register unsigned char* bytes = (unsigned char*)&val;
    bytes[read    ] = buffer[3];
    bytes[read + 1] = buffer[2];
    bytes[read + 2] = buffer[1];
    bytes[read + 3] = buffer[0];
    read += 4;
    return true;
}
bool Buffer::tryReadDouble(double& val)
{
    if(RemainingData() < 8) return false;
    register unsigned char* bytes = (unsigned char*)&val;
    bytes[read    ] = buffer[7];
    bytes[read + 1] = buffer[6];
    bytes[read + 2] = buffer[5];
    bytes[read + 3] = buffer[4];
    bytes[read + 4] = buffer[3];
    bytes[read + 5] = buffer[2];
    bytes[read + 6] = buffer[1];
    bytes[read + 7] = buffer[0];
    read += 8;
    return true;
}