194 lines
3.9 KiB
C++
194 lines
3.9 KiB
C++
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2008 INRIA
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Mathieu Lacage <mathieu.lacage@sophia.inria.fr>
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*/
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#include "tag-buffer.h"
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#include "ns3/assert.h"
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#include <string.h>
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namespace ns3 {
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#ifndef TAG_BUFFER_USE_INLINE
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void
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TagBuffer::WriteU8 (uint8_t v)
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{
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NS_ASSERT (m_current + 1 <= m_end);
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*m_current = v;
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m_current++;
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}
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void
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TagBuffer::WriteU16 (uint16_t data)
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{
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WriteU8 ((data >> 0) & 0xff);
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WriteU8 ((data >> 8) & 0xff);
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}
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void
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TagBuffer::WriteU32 (uint32_t data)
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{
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WriteU8 ((data >> 0) & 0xff);
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WriteU8 ((data >> 8) & 0xff);
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WriteU8 ((data >> 16) & 0xff);
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WriteU8 ((data >> 24) & 0xff);
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}
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uint8_t
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TagBuffer::ReadU8 (void)
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{
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NS_ASSERT (m_current + 1 <= m_end);
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uint8_t v;
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v = *m_current;
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m_current++;
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return v;
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}
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uint16_t
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TagBuffer::ReadU16 (void)
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{
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uint8_t byte0 = ReadU8 ();
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uint8_t byte1 = ReadU8 ();
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uint16_t data = byte1;
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data <<= 8;
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data |= byte0;
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return data;
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}
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uint32_t
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TagBuffer::ReadU32 (void)
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{
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uint8_t byte0 = ReadU8 ();
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uint8_t byte1 = ReadU8 ();
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uint8_t byte2 = ReadU8 ();
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uint8_t byte3 = ReadU8 ();
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uint32_t data = byte3;
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data <<= 8;
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data |= byte2;
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data <<= 8;
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data |= byte1;
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data <<= 8;
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data |= byte0;
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return data;
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}
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#endif /* TAG_BUFFER_USE_INLINE */
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void
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TagBuffer::WriteU64 (uint64_t data)
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{
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WriteU8 ((data >> 0) & 0xff);
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WriteU8 ((data >> 8) & 0xff);
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WriteU8 ((data >> 16) & 0xff);
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WriteU8 ((data >> 24) & 0xff);
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WriteU8 ((data >> 32) & 0xff);
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WriteU8 ((data >> 40) & 0xff);
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WriteU8 ((data >> 48) & 0xff);
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WriteU8 ((data >> 54) & 0xff);
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}
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void
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TagBuffer::WriteDouble (double v)
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{
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uint8_t *buf = (uint8_t *)&v;
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for (uint32_t i = 0; i < sizeof (double); ++i, ++buf)
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{
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WriteU8 (*buf);
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}
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}
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void
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TagBuffer::Write (const uint8_t *buffer, uint32_t size)
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{
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for (uint32_t i = 0; i < size; ++i, ++buffer)
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{
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WriteU8 (*buffer);
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}
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}
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uint64_t
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TagBuffer::ReadU64 (void)
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{
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uint8_t byte0 = ReadU8 ();
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uint8_t byte1 = ReadU8 ();
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uint8_t byte2 = ReadU8 ();
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uint8_t byte3 = ReadU8 ();
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uint8_t byte4 = ReadU8 ();
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uint8_t byte5 = ReadU8 ();
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uint8_t byte6 = ReadU8 ();
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uint8_t byte7 = ReadU8 ();
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uint32_t data = byte7;
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data <<= 8;
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data |= byte6;
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data <<= 8;
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data |= byte5;
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data <<= 8;
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data |= byte4;
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data <<= 8;
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data |= byte3;
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data <<= 8;
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data |= byte2;
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data <<= 8;
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data |= byte1;
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data <<= 8;
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data |= byte0;
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return data;
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}
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double
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TagBuffer::ReadDouble (void)
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{
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double v;
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uint8_t *buf = (uint8_t *)&v;
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for (uint32_t i = 0; i < sizeof (double); ++i, ++buf)
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{
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*buf = ReadU8 ();
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}
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return v;
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}
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void
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TagBuffer::Read (uint8_t *buffer, uint32_t size)
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{
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for (uint32_t i = 0; i < size; ++i, ++buffer)
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{
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*buffer = ReadU8 ();
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}
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}
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TagBuffer::TagBuffer (uint8_t *start, uint8_t *end)
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: m_current (start),
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m_end (end)
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{}
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void
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TagBuffer::TrimAtEnd (uint32_t trim)
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{
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NS_ASSERT (m_current <= (m_end - trim));
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m_end -= trim;
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}
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void
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TagBuffer::CopyFrom (TagBuffer o)
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{
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NS_ASSERT (o.m_end >= o.m_current);
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NS_ASSERT (m_end >= m_current);
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uintptr_t size = o.m_end - o.m_current;
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NS_ASSERT (size <= (uintptr_t)(m_end - m_current));
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memcpy (m_current, o.m_current, size);
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m_current += size;
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}
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} // namespace ns3
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