forked from dolphin-emu/dolphin
b21a00d290
This wouldn't be much of a data reader if it can't access the read-only data pointer in read-only contexts. Especially if it can get a writable equivalent in contexts that aren't read-only.
67 lines
1.3 KiB
C++
67 lines
1.3 KiB
C++
// Copyright 2008 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#pragma once
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#include <cstring>
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#include "Common/Common.h"
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#include "Common/CommonTypes.h"
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#include "Common/Swap.h"
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class DataReader
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{
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public:
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DataReader() = default;
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DataReader(u8* src, u8* end_) : buffer(src), end(end_) {}
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u8* GetPointer() { return buffer; }
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const u8* GetPointer() const { return buffer; }
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DataReader& operator=(u8* src)
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{
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buffer = src;
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return *this;
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}
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size_t size() const { return end - buffer; }
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template <typename T, bool swapped = true>
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__forceinline T Peek(int offset = 0) const
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{
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T data;
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std::memcpy(&data, &buffer[offset], sizeof(T));
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if (swapped)
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data = Common::FromBigEndian(data);
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return data;
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}
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template <typename T, bool swapped = true>
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__forceinline T Read()
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{
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const T result = Peek<T, swapped>();
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buffer += sizeof(T);
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return result;
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}
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template <typename T, bool swapped = false>
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__forceinline void Write(T data)
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{
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if (swapped)
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data = Common::FromBigEndian(data);
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std::memcpy(buffer, &data, sizeof(T));
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buffer += sizeof(T);
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}
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template <typename T = u8>
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void Skip(size_t data = 1)
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{
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buffer += sizeof(T) * data;
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}
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private:
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u8* __restrict buffer = nullptr;
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u8* end = nullptr;
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};
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