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replaced with table offset

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Orange
2026-03-22 18:58:07 +03:00
parent 0769d3d079
commit f60e18b6ba
2 changed files with 14 additions and 12 deletions
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8
include/omath/rev_eng/internal_rev_object.hpp
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@@ -116,11 +116,11 @@ namespace omath::rev_eng
return call_method<ReturnType>(vtable[Id], arg_list...); return call_method<ReturnType>(vtable[Id], arg_list...);
} }
template<std::size_t TableIndex, std::size_t Id, class ReturnType> template<std::ptrdiff_t TableOffset, std::size_t Id, class ReturnType>
ReturnType call_virtual_method(auto... arg_list) ReturnType call_virtual_method(auto... arg_list)
{ {
auto sub_this = reinterpret_cast<void*>( auto sub_this = reinterpret_cast<void*>(
reinterpret_cast<std::uintptr_t>(this) + TableIndex * sizeof(std::uintptr_t)); reinterpret_cast<std::uintptr_t>(this) + TableOffset);
const auto vtable = *reinterpret_cast<void***>(sub_this); const auto vtable = *reinterpret_cast<void***>(sub_this);
#ifdef _MSC_VER #ifdef _MSC_VER
using Fn = ReturnType(__thiscall*)(void*, decltype(arg_list)...); using Fn = ReturnType(__thiscall*)(void*, decltype(arg_list)...);
@@ -129,11 +129,11 @@ namespace omath::rev_eng
#endif #endif
return reinterpret_cast<Fn>(vtable[Id])(sub_this, arg_list...); return reinterpret_cast<Fn>(vtable[Id])(sub_this, arg_list...);
} }
template<std::size_t TableIndex, std::size_t Id, class ReturnType> template<std::ptrdiff_t TableOffset, std::size_t Id, class ReturnType>
ReturnType call_virtual_method(auto... arg_list) const ReturnType call_virtual_method(auto... arg_list) const
{ {
auto sub_this = reinterpret_cast<const void*>( auto sub_this = reinterpret_cast<const void*>(
reinterpret_cast<std::uintptr_t>(this) + TableIndex * sizeof(std::uintptr_t)); reinterpret_cast<std::uintptr_t>(this) + TableOffset);
const auto vtable = *reinterpret_cast<void* const* const*>(sub_this); const auto vtable = *reinterpret_cast<void* const* const*>(sub_this);
#ifdef _MSC_VER #ifdef _MSC_VER
using Fn = ReturnType(__thiscall*)(const void*, decltype(arg_list)...); using Fn = ReturnType(__thiscall*)(const void*, decltype(arg_list)...);

18
tests/general/unit_test_reverse_enineering.cpp
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@@ -52,18 +52,20 @@ public:
class RevMultiPlayer final : omath::rev_eng::InternalReverseEngineeredObject class RevMultiPlayer final : omath::rev_eng::InternalReverseEngineeredObject
{ {
static constexpr std::ptrdiff_t TABLE_A_OFFSET = 0;
static constexpr std::ptrdiff_t TABLE_B_OFFSET = sizeof(void*);
public: public:
// Table 0 (BaseA vtable): index 0 = get_a, 1 = get_a2 // Table at offset 0 (BaseA vtable): index 0 = get_a, 1 = get_a2
[[nodiscard]] int rev_get_a() const { return call_virtual_method<0, 0, int>(); } [[nodiscard]] int rev_get_a() const { return call_virtual_method<TABLE_A_OFFSET, 0, int>(); }
[[nodiscard]] int rev_get_a2() const { return call_virtual_method<0, 1, int>(); } [[nodiscard]] int rev_get_a2() const { return call_virtual_method<TABLE_A_OFFSET, 1, int>(); }
// Table 1 (BaseB vtable): index 0 = get_b, 1 = get_b2 // Table at offset sizeof(void*) (BaseB vtable): index 0 = get_b, 1 = get_b2
[[nodiscard]] int rev_get_b() const { return call_virtual_method<1, 0, int>(); } [[nodiscard]] int rev_get_b() const { return call_virtual_method<TABLE_B_OFFSET, 0, int>(); }
[[nodiscard]] int rev_get_b2() const { return call_virtual_method<1, 1, int>(); } [[nodiscard]] int rev_get_b2() const { return call_virtual_method<TABLE_B_OFFSET, 1, int>(); }
// Non-const versions // Non-const versions
int rev_get_a_mut() { return call_virtual_method<0, 0, int>(); } int rev_get_a_mut() { return call_virtual_method<TABLE_A_OFFSET, 0, int>(); }
int rev_get_b_mut() { return call_virtual_method<1, 0, int>(); } int rev_get_b_mut() { return call_virtual_method<TABLE_B_OFFSET, 0, int>(); }
}; };
class RevPlayer final : omath::rev_eng::InternalReverseEngineeredObject class RevPlayer final : omath::rev_eng::InternalReverseEngineeredObject