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/* NewNet - A networking framework in C++
Copyright (C) 2006-2007 Ingmar K. Steen (iksteen@gmail.com)
Copyright 2008 little blue poney <lbponey@users.sourceforge.net>
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
*/
#include "nnbuffer.h"
#include "platform.h"
#define CHUNK_SIZE 8192
NewNet::Buffer::Buffer() : m_Ptr(0), m_Pos(0), m_Count(0), m_Left(0)
{
}
NewNet::Buffer::Buffer(const Buffer & that) : m_Ptr(0), m_Pos(0), m_Count(0), m_Left(0)
{
append(that.data(), that.count());
}
NewNet::Buffer &
NewNet::Buffer::operator=(const Buffer & that)
{
m_Left += m_Pos + m_Count;
m_Pos = m_Count = 0;
append(that.data(), that.count());
return *this;
}
NewNet::Buffer::~Buffer()
{
free(m_Ptr);
}
void
NewNet::Buffer::append(const unsigned char * data, size_t n)
{
if(m_Left < n)
{
if(m_Pos + m_Left >= n)
{
memmove(m_Ptr, m_Ptr + m_Pos, m_Count);
m_Left += m_Pos;
m_Pos = 0;
}
else
{
int newSize = (((n + m_Count + m_Pos) / CHUNK_SIZE) + 1) * CHUNK_SIZE;
unsigned char * newPtr = (unsigned char *)realloc(m_Ptr, newSize);
assert(newPtr != 0);
m_Ptr = newPtr;
m_Left = newSize - m_Count - m_Pos;
}
}
memcpy(m_Ptr + m_Pos + m_Count, data, n);
m_Count += n;
m_Left -= n;
}
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