69 lines
1.3 KiB
C++
69 lines
1.3 KiB
C++
// Copyright (c) Wojciech Figat. All rights reserved.
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#include "MemoryReadStream.h"
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#include "Engine/Platform/Platform.h"
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MemoryReadStream::MemoryReadStream()
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: _buffer(nullptr)
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, _position(nullptr)
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, _length(0)
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{
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}
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MemoryReadStream::MemoryReadStream(const byte* bytes, uint32 length)
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: _buffer(bytes)
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, _position(bytes)
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, _length(length)
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{
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}
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void MemoryReadStream::Init(const byte* bytes, uint32 length)
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{
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_buffer = _position = bytes;
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_length = length;
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}
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void* MemoryReadStream::Move(uint32 bytes)
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{
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ASSERT(GetLength() - GetPosition() >= bytes);
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const auto result = (void*)_position;
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_position += bytes;
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return result;
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}
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void MemoryReadStream::Flush()
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{
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}
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void MemoryReadStream::Close()
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{
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_position = _buffer = nullptr;
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_length = 0;
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}
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uint32 MemoryReadStream::GetLength()
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{
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return _length;
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}
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uint32 MemoryReadStream::GetPosition()
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{
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return static_cast<uint32>(_position - _buffer);
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}
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void MemoryReadStream::SetPosition(uint32 seek)
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{
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ASSERT(_length > 0);
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_position = _buffer + seek;
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}
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void MemoryReadStream::ReadBytes(void* data, uint32 bytes)
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{
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if (bytes > 0)
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{
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ASSERT(data && GetLength() - GetPosition() >= bytes);
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Platform::MemoryCopy(data, _position, bytes);
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_position += bytes;
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}
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}
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