112 lines
2.0 KiB
C++
112 lines
2.0 KiB
C++
/*
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Copyright (C) 2015 Srivats P.
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This file is part of "Ostinato"
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This is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#include "packetbuffer.h"
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// PacketBuffer with full control
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PacketBuffer::PacketBuffer(int size)
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{
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if (size == 0)
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size = 1600;
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buffer_ = new uchar[size];
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is_own_buffer_ = true;
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head_ = data_ = tail_ = buffer_;
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end_ = head_ + size;
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}
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// PacketBuffer wrapping already existing const buffer
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PacketBuffer::PacketBuffer(const uchar *buffer, int size)
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{
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// FIXME: ugly const_cast hack!!
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buffer_ = const_cast<uchar*>(buffer);
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is_own_buffer_ = false;
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head_ = data_ = buffer_;
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tail_ = end_ = buffer_ + size;
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}
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PacketBuffer::~PacketBuffer()
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{
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if (is_own_buffer_)
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delete[] buffer_;
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}
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int PacketBuffer::length()
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{
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return tail_ - head_;
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}
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uchar* PacketBuffer::head()
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{
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return head_;
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}
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uchar* PacketBuffer::data()
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{
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return data_;
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}
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uchar* PacketBuffer::tail()
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{
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return tail_;
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}
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uchar* PacketBuffer::end()
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{
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return end_;
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}
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void PacketBuffer::reserve(int len)
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{
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// FIXME: add validation
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data_ += len;
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tail_ += len;
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}
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uchar* PacketBuffer::pull(int len)
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{
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if ((tail_ - data_) < len)
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return NULL;
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data_ += len;
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return data_;
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}
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uchar* PacketBuffer::push(int len)
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{
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if ((data_ - head_) < len)
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return NULL;
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data_ -= len;
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return data_;
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}
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uchar* PacketBuffer::put(int len)
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{
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uchar *oldTail = tail_;
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if ((end_ - tail_) < len)
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return NULL;
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tail_ += len;
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return oldTail;
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}
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