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Copy pathHooking.Patterns.h
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249 lines (203 loc) · 5.96 KB
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/*
* This file is part of the CitizenFX project - http://citizen.re/
*
* See LICENSE and MENTIONS in the root of the source tree for information
* regarding licensing.
*/
#pragma once
#include <cassert>
#include <vector>
#include <string_view>
#pragma warning(push)
#pragma warning(disable:4201)
namespace hook
{
extern ptrdiff_t baseAddressDifference;
// sets the base address difference based on an obtained pointer
inline void set_base(uintptr_t address)
{
#ifdef _M_IX86
uintptr_t addressDiff = (address - 0x400000);
#elif defined(_M_AMD64)
uintptr_t addressDiff = (address - 0x140000000);
#endif
// pointer-style cast to ensure unsigned overflow ends up copied directly into a signed value
baseAddressDifference = *(ptrdiff_t*)&addressDiff;
}
// sets the base to the process main base
void set_base();
inline uintptr_t getRVA(uintptr_t rva)
{
set_base();
#ifdef _M_IX86
return static_cast<uintptr_t>(baseAddressDifference + 0x400000 + rva);
#elif defined(_M_AMD64)
return static_cast<uintptr_t>(baseAddressDifference + 0x140000000 + rva);
#endif
}
template<typename T>
inline uintptr_t get_adjusted(T address)
{
if ((uintptr_t)address >= 0x140000000 && (uintptr_t)address <= 0x146000000)
{
return (uintptr_t)address + baseAddressDifference;
}
return (uintptr_t)address;
}
class pattern_match
{
private:
void* m_pointer;
public:
inline pattern_match(void* pointer)
: m_pointer(pointer)
{
}
template<typename T>
T* get(ptrdiff_t offset = 0) const
{
char* ptr = reinterpret_cast<char*>(m_pointer);
return reinterpret_cast<T*>(ptr + offset);
}
};
class pattern
{
private:
std::basic_string<uint8_t> m_bytes;
std::basic_string<uint8_t> m_mask;
#if PATTERNS_USE_HINTS
uint64_t m_hash;
#endif
std::vector<pattern_match> m_matches;
bool m_matched = false;
uintptr_t m_rangeStart;
uintptr_t m_rangeEnd;
private:
void Initialize(std::string_view pattern);
bool ConsiderHint(uintptr_t offset);
void EnsureMatches(uint32_t maxCount);
inline pattern_match _get_internal(size_t index) const
{
return m_matches[index];
}
inline pattern(uintptr_t module)
: pattern(module, 0)
{
}
inline pattern(uintptr_t begin, uintptr_t end)
: m_rangeStart(begin), m_rangeEnd(end)
{
}
public:
pattern()
{
}
pattern(std::string_view pattern)
: pattern(getRVA(0))
{
Initialize(std::move(pattern));
}
inline pattern(void* module, std::string_view pattern)
: pattern(reinterpret_cast<uintptr_t>(module))
{
Initialize(std::move(pattern));
}
inline pattern(uintptr_t begin, uintptr_t end, std::string_view pattern)
: m_rangeStart(begin), m_rangeEnd(end)
{
Initialize(std::move(pattern));
}
inline pattern&& count(uint32_t expected)
{
EnsureMatches(expected);
assert(m_matches.size() == expected);
return std::forward<pattern>(*this);
}
inline pattern&& count_hint(uint32_t expected)
{
EnsureMatches(expected);
return std::forward<pattern>(*this);
}
inline pattern&& clear(void* module = nullptr)
{
if (module)
{
this->m_rangeStart = reinterpret_cast<uintptr_t>(module);
this->m_rangeEnd = 0;
}
m_matches.clear();
m_matched = false;
return std::forward<pattern>(*this);
}
inline size_t size()
{
EnsureMatches(UINT32_MAX);
return m_matches.size();
}
inline bool empty()
{
return size() == 0;
}
inline pattern_match get(size_t index)
{
EnsureMatches(UINT32_MAX);
return _get_internal(index);
}
inline pattern_match get_one()
{
return std::forward<pattern>(*this).count(1)._get_internal(0);
}
template<typename T = void>
inline auto get_first(ptrdiff_t offset = 0)
{
return get_one().get<T>(offset);
}
template <typename Pred>
inline Pred for_each_result(Pred&& pred)
{
EnsureMatches(UINT32_MAX);
for (auto it : m_matches)
{
std::forward<Pred>(pred)(it);
}
return std::forward<Pred>(pred);
}
public:
#if PATTERNS_USE_HINTS && PATTERNS_CAN_SERIALIZE_HINTS
// define a hint
static void hint(uint64_t hash, uintptr_t address);
#endif
friend class range_pattern;
friend class module_pattern;
};
class range_pattern : public pattern
{
public:
inline range_pattern(uintptr_t begin, uintptr_t end, std::string_view bytes) : pattern(begin, end)
{
Initialize(std::move(bytes));
}
};
class module_pattern : public pattern
{
public:
inline module_pattern(void* module, std::string_view bytes) : pattern(reinterpret_cast<uintptr_t>(module))
{
Initialize(std::move(bytes));
}
};
inline pattern make_module_pattern(void* module, std::string_view bytes)
{
return pattern(module, std::move(bytes));
}
inline pattern make_range_pattern(uintptr_t begin, uintptr_t end, std::string_view bytes)
{
return pattern(begin, end, std::move(bytes));
}
template<typename T = void>
inline auto get_pattern(std::string_view pattern_string, ptrdiff_t offset = 0)
{
return pattern(std::move(pattern_string)).get_first<T>(offset);
}
}
#pragma warning(pop)