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obfs, fsm: Add Finite state machine

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revsic
2019-02-23 04:56:19 +09:00
parent c070451823
commit 2a7d72adc8
3 changed files with 139 additions and 0 deletions
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obfuscator.hpp
+67
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@@ -4,6 +4,9 @@
#include <type_traits>
#include <utility>
#define OBFS_FINITE_STATE_MACHINE
#define STATE(Name) struct Name {};
#define EVENT(Name) struct Name {};
#define COMPILE_TIME_RANDOM
#define MAKE_RAND_VAL(MOD) RAND_VAL<__LINE__, MOD>
#define COMPILE_TIME_SEQUENCE
@@ -11,6 +14,70 @@
#define MAKE_STRING(Var, String, ...) constexpr auto Var = obfs::make_string<__VA_ARGS__>(String);
namespace obfs {
template <typename Event, typename State>
struct Next {
using event = Event;
using state = State;
};
struct FalseType {};
template <typename IfFalse, typename T, typename... Ts>
struct First {
using type = std::conditional_t<
std::is_same_v<T, FalseType>,
typename First<IfFalse, Ts...>::type,
T>;
};
template <typename IfFalse, typename T>
struct First<IfFalse, T> {
using type = std::conditional_t<
std::is_same_v<T, FalseType>,
IfFalse,
T>;
};
template <typename State, typename... Nexts>
struct Stage {
template <typename Cond, typename Event>
using act = std::conditional_t<
std::is_same_v<typename Cond::event, Event>,
typename Cond::state,
FalseType>;
template <typename Event>
using next = typename First<State, act<Nexts, Event>...>::type;
};
template <typename... Specs>
struct StateMachine {
};
STATE(Final);
EVENT(none);
EVENT(Trigger);
STATE(state1); STATE(state2); STATE(state3); STATE(state4); STATE(state5);
EVENT(event1); EVENT(event2); EVENT(event3); EVENT(event4); EVENT(event5);
using machine = StateMachine<
Stage<state1, Next<event5, state2>,
Next<event1, state3>>,
Stage<state2, Next<event2, state4>>,
Stage<state3, Next<none, state3>>,
Stage<state4, Next<event4, state1>,
Next<event3, state5>>,
Stage<state5, Next<Trigger, Final>>>;
}
namespace obfs {
constexpr char TIME[] = __TIME__;
constexpr int digit(char c) {
obfuscator/obfs/fsm.hpp
+71
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@@ -0,0 +1,71 @@
#ifndef OBFS_FINITE_STATE_MACHINE
#define OBFS_FINITE_STATE_MACHINE
#include <type_traits>
namespace obfs {
template <typename Event, typename State>
struct Next {
using event = Event;
using state = State;
};
struct FalseType {};
template <typename IfFalse, typename T, typename... Ts>
struct First {
using type = std::conditional_t<
std::is_same_v<T, FalseType>,
typename First<IfFalse, Ts...>::type,
T>;
};
template <typename IfFalse, typename T>
struct First<IfFalse, T> {
using type = std::conditional_t<
std::is_same_v<T, FalseType>,
IfFalse,
T>;
};
template <typename State, typename... Nexts>
struct Stage {
template <typename Cond, typename Event>
using act = std::conditional_t<
std::is_same_v<typename Cond::event, Event>,
typename Cond::state,
FalseType>;
template <typename Event>
using next = typename First<State, act<Nexts, Event>...>::type;
};
template <typename... Specs>
struct StateMachine {
};
#define STATE(Name) struct Name {};
#define EVENT(Name) struct Name {};
STATE(Final);
EVENT(none);
EVENT(Trigger);
STATE(state1); STATE(state2); STATE(state3); STATE(state4); STATE(state5);
EVENT(event1); EVENT(event2); EVENT(event3); EVENT(event4); EVENT(event5);
using machine = StateMachine<
Stage<state1, Next<event5, state2>,
Next<event1, state3>>,
Stage<state2, Next<event2, state4>>,
Stage<state3, Next<none, state3>>,
Stage<state4, Next<event4, state1>,
Next<event3, state5>>,
Stage<state5, Next<Trigger, Final>>>;
}
#endif
obfuscator/obfuscator.hpp
+1
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@@ -1,6 +1,7 @@
#ifndef OBFUSCATOR
#define OBFUSCATOR
#include "obfs/fsm.hpp"
#include "obfs/random.hpp"
#include "obfs/sequence.hpp"
#include "obfs/string.hpp"