ByteStream.cpp

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/*
 * This file is a part of the Biology project by eons LLC.
 * Biology (aka Develop Biology) is a framework for approaching software
 * development from a natural sciences perspective.
 *
 * Copyright (C) 2021 Séon O'Shannon & eons LLC
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 */
 
#include "bio/common/ByteStream.h"
 
namespace bio {
 
ByteStream::ByteStream()
 :
 m_stream(NULL),
 m_typeName(""),
 m_size(0),
 m_holding(false)
{
}
 
ByteStream::ByteStream(const ByteStream& other)
{
 *this = other;
}
 
ByteStream::~ByteStream()
{
 Release();
}
 
void ByteStream::operator=(const ByteStream& other)
{
 Release(); //wipe old state.
 
 if (other.m_holding)
 {
 //We can't free the same memory twice, so we have to allocate a new block for ourselves.
 Set(other);
 }
 else
 {
 m_stream = other.m_stream;
 m_typeName = other.m_typeName;
 m_size = other.m_size;
 m_holding = false;
 }
}
 
bool ByteStream::IsEmpty() const
{
 return !m_stream;
}
 
std::string ByteStream::GetTypeName() const
{
 return m_typeName;
}
 
std::size_t ByteStream::GetSize() const
{
 return m_size;
}
 
void* ByteStream::IKnowWhatImDoing()
{
 return m_stream;
}
 
void ByteStream::Set(const ByteStream& other)
{
 m_stream = std::malloc(other.m_size);
 memcpy(
 m_stream,
 other.m_stream,
 other.m_size
 );
 m_size = other.m_size;
 m_typeName = other.m_typeName;
 m_holding = true;
}
 
void ByteStream::Release()
{
 if (!m_holding)
 {
 return;
 }
 std::free(m_stream);
 m_size = 0;
 m_typeName.clear();
 m_holding = false;
}
 
bool ByteStream::operator==(const ByteStream& other) const
{
 if (m_size != other.m_size || m_typeName != other.m_typeName)
 {
 return false;
 }
 return memcmp(
 m_stream,
 other.m_stream,
 m_size
 ) == 0;
}
 
} //bio namespace