mirror of
https://github.com/HIllya51/LunaHook.git
synced 2024-12-25 12:44:13 +08:00
126 lines
3.5 KiB
C++
126 lines
3.5 KiB
C++
#include "EME.h"
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/********************************************************************************************
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EMEHook hook: (Contributed by Freaka)
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EmonEngine is used by LoveJuice company and TakeOut. Earlier builds were apparently
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called Runrun engine. String parsing varies a lot depending on the font settings and
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speed setting. E.g. without antialiasing (which very early versions did not have)
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uses TextOutA, fast speed triggers different functions then slow/normal. The user can
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set his own name and some odd control characters are used (0x09 for line break, 0x0D
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for paragraph end) which is parsed and put together on-the-fly while playing so script
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can't be read directly.
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********************************************************************************************/
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bool InsertEMEHook()
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{
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ULONG addr = MemDbg::findCallAddress((ULONG)::IsDBCSLeadByte, processStartAddress, processStopAddress);
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// no needed as first call to IsDBCSLeadByte is correct, but sig could be used for further verification
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// WORD sig = 0x51C3;
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// while (c && (*(WORD*)(c-2)!=sig))
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//{
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// //-0x1000 as FindCallOrJmpAbs always uses an offset of 0x1000
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// c = Util::FindCallOrJmpAbs((DWORD)IsDBCSLeadByte,processStopAddress-c-0x1000+4,c-0x1000+4,false);
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//}
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if (!addr)
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{
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ConsoleOutput("EME: pattern does not exist");
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return false;
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}
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HookParam hp;
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hp.address = addr;
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hp.offset = get_reg(regs::eax);
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hp.type = NO_CONTEXT | DATA_INDIRECT | USING_STRING;
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ConsoleOutput("INSERT EmonEngine");
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// ConsoleOutput("EmonEngine, hook will only work with text speed set to slow or normal!");
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// else ConsoleOutput("Unknown EmonEngine engine");
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return NewHook(hp, "EmonEngine");
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}
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namespace
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{
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// LRU template class, recv two type params: key & value
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template <typename Key>
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class LRUCache
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{
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private:
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// cache capacity
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size_t _capacity = 0;
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// list _keys中key的指向位置
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std::unordered_map<Key, typename std::list<Key>::iterator> _cache;
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std::list<Key> _keys;
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public:
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// construct function
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LRUCache(size_t size) : _capacity(size){};
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bool contains(Key key)
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{
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auto it = _cache.find(key);
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if (it == _cache.end())
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{
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return false;
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}; // 返回默认值
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_keys.splice(_keys.begin(), _keys, it->second);
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return true;
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}
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void put(Key key)
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{
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auto it = _cache.find(key);
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if (it != _cache.end())
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{
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_keys.splice(_keys.begin(), _keys, it->second);
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return;
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}
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if (_keys.size() == _capacity)
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{
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Key oldKey = _keys.back();
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_keys.pop_back();
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_cache.erase(oldKey);
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}
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_keys.push_front(key);
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_cache[key] = _keys.begin();
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}
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};
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bool takeout()
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{
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//https://vndb.org/v6187
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//みちくさ～Loitering on the way～
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trigger_fun = [](LPVOID addr, hook_stack *stack)
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{
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if (addr != (LPVOID)GetGlyphOutlineA)
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return false;
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auto caller = stack->retaddr;
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auto add = MemDbg::findEnclosingAlignedFunction(caller);
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if (!add)
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return true;
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HookParam hp;
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hp.address = add;
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hp.type = USING_STRING;
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hp.offset = get_stack(4);
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hp.filter_fun = [](LPVOID data, size_t *size, HookParam *)
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{
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auto xx = std::string((char *)data, *size);
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static LRUCache<std::string> last(10);
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if (last.contains(xx))
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return false;
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last.put(xx);
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return true;
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};
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return NewHook(hp, "takeout");
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};
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return false;
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}
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}
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bool EME::attach_function()
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{
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return InsertEMEHook() | takeout();
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} |