/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Copyright (c) 2008 INRIA
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation;
*
* 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
*
* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
*/
#include "tag-buffer.h"
#include "ns3/assert.h"
#include <string.h>
namespace ns3 {
#ifndef TAG_BUFFER_USE_INLINE
void
TagBuffer::WriteU8 (uint8_t v)
{
NS_ASSERT (m_current + 1 <= m_end);
*m_current = v;
m_current++;
}
void
TagBuffer::WriteU16 (uint16_t data)
{
WriteU8 ((data >> 0) & 0xff);
WriteU8 ((data >> 8) & 0xff);
}
void
TagBuffer::WriteU32 (uint32_t data)
{
WriteU8 ((data >> 0) & 0xff);
WriteU8 ((data >> 8) & 0xff);
WriteU8 ((data >> 16) & 0xff);
WriteU8 ((data >> 24) & 0xff);
}
uint8_t
TagBuffer::ReadU8 (void)
{
NS_ASSERT (m_current + 1 <= m_end);
uint8_t v;
v = *m_current;
m_current++;
return v;
}
uint16_t
TagBuffer::ReadU16 (void)
{
uint8_t byte0 = ReadU8 ();
uint8_t byte1 = ReadU8 ();
uint16_t data = byte1;
data <<= 8;
data |= byte0;
return data;
}
uint32_t
TagBuffer::ReadU32 (void)
{
uint8_t byte0 = ReadU8 ();
uint8_t byte1 = ReadU8 ();
uint8_t byte2 = ReadU8 ();
uint8_t byte3 = ReadU8 ();
uint32_t data = byte3;
data <<= 8;
data |= byte2;
data <<= 8;
data |= byte1;
data <<= 8;
data |= byte0;
return data;
}
#endif /* TAG_BUFFER_USE_INLINE */
void
TagBuffer::WriteU64 (uint64_t data)
{
WriteU8 ((data >> 0) & 0xff);
WriteU8 ((data >> 8) & 0xff);
WriteU8 ((data >> 16) & 0xff);
WriteU8 ((data >> 24) & 0xff);
WriteU8 ((data >> 32) & 0xff);
WriteU8 ((data >> 40) & 0xff);
WriteU8 ((data >> 48) & 0xff);
WriteU8 ((data >> 54) & 0xff);
}
void
TagBuffer::WriteDouble (double v)
{
uint8_t *buf = (uint8_t *)&v;
for (uint32_t i = 0; i < sizeof (double); ++i, ++buf)
{
WriteU8 (*buf);
}
}
void
TagBuffer::Write (const uint8_t *buffer, uint32_t size)
{
for (uint32_t i = 0; i < size; ++i, ++buffer)
{
WriteU8 (*buffer);
}
}
uint64_t
TagBuffer::ReadU64 (void)
{
uint8_t byte0 = ReadU8 ();
uint8_t byte1 = ReadU8 ();
uint8_t byte2 = ReadU8 ();
uint8_t byte3 = ReadU8 ();
uint8_t byte4 = ReadU8 ();
uint8_t byte5 = ReadU8 ();
uint8_t byte6 = ReadU8 ();
uint8_t byte7 = ReadU8 ();
uint32_t data = byte7;
data <<= 8;
data |= byte6;
data <<= 8;
data |= byte5;
data <<= 8;
data |= byte4;
data <<= 8;
data |= byte3;
data <<= 8;
data |= byte2;
data <<= 8;
data |= byte1;
data <<= 8;
data |= byte0;
return data;
}
double
TagBuffer::ReadDouble (void)
{
double v;
uint8_t *buf = (uint8_t *)&v;
for (uint32_t i = 0; i < sizeof (double); ++i, ++buf)
{
*buf = ReadU8 ();
}
return v;
}
void
TagBuffer::Read (uint8_t *buffer, uint32_t size)
{
for (uint32_t i = 0; i < size; ++i, ++buffer)
{
*buffer = ReadU8 ();
}
}
TagBuffer::TagBuffer (uint8_t *start, uint8_t *end)
: m_current (start),
m_end (end)
{}
void
TagBuffer::TrimAtEnd (uint32_t trim)
{
NS_ASSERT (m_current <= (m_end - trim));
m_end -= trim;
}
void
TagBuffer::CopyFrom (TagBuffer o)
{
NS_ASSERT (o.m_end >= o.m_current);
NS_ASSERT (m_end >= m_current);
uintptr_t size = o.m_end - o.m_current;
NS_ASSERT (size <= (uintptr_t)(m_end - m_current));
memcpy (m_current, o.m_current, size);
m_current += size;
}
} // namespace ns3