EGameTools/DL2GameOverhaulScript/source/sigscan/sigscan.h

#include <Windows.h>
#include <vector>
#include <list>
#include <Psapi.h>
#include <string_view>

enum class PatternType {
	Address,
	Pointer,
	PointerBYTE,
	PointerWORD,
	PointerDWORD,
	PointerQWORD,
	RelativePointer,
	RelativePointerBYTE,
	RelativePointerWORD,
	RelativePointerDWORD,
	RelativePointerQWORD,
};

struct Pattern {
	const char* pattern;
	PatternType type;
};

class PatternScanner {
private:
	template <typename T> static LPVOID ResolveRelativePtr(LPVOID Address) {
		if (!Address)
			return nullptr;

		T offset = *reinterpret_cast<T*>(Address);
		if (!offset)
			return nullptr;

		return reinterpret_cast<LPVOID>(reinterpret_cast<DWORD64>(Address) + offset + sizeof(T));
	}

	template <typename T> static LPVOID ResolvePtr(LPVOID Address) {
		if (!Address)
			return nullptr;

		return reinterpret_cast<LPVOID>(*reinterpret_cast<T*>(Address));
	}

public:
	static LPVOID FindPattern(LPVOID startAddress, DWORD64 searchSize, const Pattern &pattern);
	static LPVOID FindPattern(const std::string_view ModuleName, const Pattern &pattern);
	static LPVOID FindPattern(const Pattern &pattern);

	static std::vector<LPVOID> FindPatterns(const std::string_view ModuleName, const Pattern &pattern);
	static std::vector<LPVOID> FindPatterns(LPVOID startAddress, DWORD64 searchSize, const Pattern &pattern);

	static LPVOID FindPattern(LPVOID startAddress, DWORD64 searchSize, const Pattern* patterns, float *ratio = nullptr);
	static LPVOID FindPattern(const std::string_view ModuleName, Pattern* patterns, float *ratio = nullptr);
};