64 lines
1.3 KiB
C++
64 lines
1.3 KiB
C++
// Copyright (C) 2015 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Core module"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/MemoryView.hpp>
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#include <algorithm>
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#include <cstring>
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#include <Nazara/Core/Debug.hpp>
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namespace Nz
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{
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MemoryView::MemoryView(const void* ptr, UInt64 size) :
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Stream(OpenMode_ReadOnly),
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m_ptr(reinterpret_cast<const UInt8*>(ptr)),
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m_pos(0),
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m_size(size)
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{
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}
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bool MemoryView::EndOfStream() const
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{
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return m_pos >= m_size;
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}
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UInt64 MemoryView::GetCursorPos() const
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{
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return m_pos;
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}
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UInt64 MemoryView::GetSize() const
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{
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return m_size;
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}
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bool MemoryView::SetCursorPos(UInt64 offset)
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{
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m_pos = std::min(offset, m_size);
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return true;
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}
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void MemoryView::FlushStream()
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{
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NazaraInternalError("FlushStream has been called on a MemoryView");
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}
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std::size_t MemoryView::ReadBlock(void* buffer, std::size_t size)
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{
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std::size_t readSize = std::min<std::size_t>(size, static_cast<std::size_t>(m_size - m_pos));
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if (buffer)
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std::memcpy(buffer, &m_ptr[m_pos], readSize);
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m_pos += readSize;
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return readSize;
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}
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std::size_t MemoryView::WriteBlock(const void* buffer, std::size_t size)
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{
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NazaraInternalError("WriteBlock has been called on a MemoryView");
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return 0;
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}
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}
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