1 files changed, 493 insertions, 0 deletions
diff --git a/NorthstarDLL/squirrel/squirrel.h b/NorthstarDLL/squirrel/squirrel.h
new file mode 100644
index 00000000..82825b3c
--- /dev/null
+++ b/NorthstarDLL/squirrel/squirrel.h
@@ -0,0 +1,493 @@
+#pragma once
+
+#include "squirrelclasstypes.h"
+#include "squirrelautobind.h"
+#include "core/math/vector.h"
+#include "mods/modmanager.h"
+
+// stolen from ttf2sdk: sqvm types
+typedef float SQFloat;
+typedef long SQInteger;
+typedef unsigned long SQUnsignedInteger;
+typedef char SQChar;
+typedef SQUnsignedInteger SQBool;
+
+static constexpr int operator&(ScriptContext first, ScriptContext second)
+{
+	return first == second;
+}
+
+static constexpr int operator&(int first, ScriptContext second)
+{
+	return first & (1 << static_cast<int>(second));
+}
+
+static constexpr int operator|(ScriptContext first, ScriptContext second)
+{
+	return (1 << static_cast<int>(first)) + (1 << static_cast<int>(second));
+}
+
+static constexpr int operator|(int first, ScriptContext second)
+{
+	return first + (1 << static_cast<int>(second));
+}
+
+const char* GetContextName(ScriptContext context);
+const char* GetContextName_Short(ScriptContext context);
+eSQReturnType SQReturnTypeFromString(const char* pReturnType);
+const char* SQTypeNameFromID(const int iTypeId);
+
+ScriptContext ScriptContextFromString(std::string string);
+
+namespace NS::log
+{
+	template <ScriptContext context> std::shared_ptr<spdlog::logger> squirrel_logger();
+}; // namespace NS::log
+
+void schedule_call_external(ScriptContext context, const char* func_name, SquirrelMessage_External_Pop function);
+
+// This base class means that only the templated functions have to be rebuilt for each template instance
+// Cuts down on compile time by ~5 seconds
+class SquirrelManagerBase
+{
+  protected:
+	std::vector<SQFuncRegistration*> m_funcRegistrations;
+
+  public:
+	CSquirrelVM* m_pSQVM;
+	std::map<std::string, SQFunction> m_funcOverrides = {};
+	std::map<std::string, SQFunction> m_funcOriginals = {};
+
+	bool m_bFatalCompilationErrors = false;
+
+	std::shared_ptr<spdlog::logger> logger;
+
+#pragma region SQVM funcs
+	RegisterSquirrelFuncType RegisterSquirrelFunc;
+	sq_defconstType __sq_defconst;
+
+	sq_compilebufferType __sq_compilebuffer;
+	sq_callType __sq_call;
+	sq_raiseerrorType __sq_raiseerror;
+
+	sq_newarrayType __sq_newarray;
+	sq_arrayappendType __sq_arrayappend;
+
+	sq_newtableType __sq_newtable;
+	sq_newslotType __sq_newslot;
+
+	sq_pushroottableType __sq_pushroottable;
+	sq_pushstringType __sq_pushstring;
+	sq_pushintegerType __sq_pushinteger;
+	sq_pushfloatType __sq_pushfloat;
+	sq_pushboolType __sq_pushbool;
+	sq_pushassetType __sq_pushasset;
+	sq_pushvectorType __sq_pushvector;
+	sq_pushobjectType __sq_pushobject;
+
+	sq_getstringType __sq_getstring;
+	sq_getintegerType __sq_getinteger;
+	sq_getfloatType __sq_getfloat;
+	sq_getboolType __sq_getbool;
+	sq_getType __sq_get;
+	sq_getassetType __sq_getasset;
+	sq_getuserdataType __sq_getuserdata;
+	sq_getvectorType __sq_getvector;
+	sq_getthisentityType __sq_getthisentity;
+	sq_getobjectType __sq_getobject;
+
+	sq_stackinfosType __sq_stackinfos;
+
+	sq_createuserdataType __sq_createuserdata;
+	sq_setuserdatatypeidType __sq_setuserdatatypeid;
+	sq_getfunctionType __sq_getfunction;
+
+	sq_getentityfrominstanceType __sq_getentityfrominstance;
+	sq_GetEntityConstantType __sq_GetEntityConstant_CBaseEntity;
+
+#pragma endregion
+
+#pragma region SQVM func wrappers
+	inline void defconst(CSquirrelVM* sqvm, const SQChar* pName, int nValue)
+	{
+		__sq_defconst(sqvm, pName, nValue);
+	}
+
+	inline SQRESULT
+	compilebuffer(CompileBufferState* bufferState, const SQChar* bufferName = "unnamedbuffer", const SQBool bShouldThrowError = false)
+	{
+		return __sq_compilebuffer(m_pSQVM->sqvm, bufferState, bufferName, -1, bShouldThrowError);
+	}
+
+	inline SQRESULT _call(HSquirrelVM* sqvm, const SQInteger args)
+	{
+		return __sq_call(sqvm, args + 1, false, false);
+	}
+
+	inline SQInteger raiseerror(HSquirrelVM* sqvm, const SQChar* sError)
+	{
+		return __sq_raiseerror(sqvm, sError);
+	}
+
+	inline void newarray(HSquirrelVM* sqvm, const SQInteger stackpos = 0)
+	{
+		__sq_newarray(sqvm, stackpos);
+	}
+
+	inline SQRESULT arrayappend(HSquirrelVM* sqvm, const SQInteger stackpos)
+	{
+		return __sq_arrayappend(sqvm, stackpos);
+	}
+
+	inline SQRESULT newtable(HSquirrelVM* sqvm)
+	{
+		return __sq_newtable(sqvm);
+	}
+
+	inline SQRESULT newslot(HSquirrelVM* sqvm, SQInteger idx, SQBool bStatic)
+	{
+		return __sq_newslot(sqvm, idx, bStatic);
+	}
+
+	inline void pushroottable(HSquirrelVM* sqvm)
+	{
+		__sq_pushroottable(sqvm);
+	}
+
+	inline void pushstring(HSquirrelVM* sqvm, const SQChar* sVal, int length = -1)
+	{
+		__sq_pushstring(sqvm, sVal, length);
+	}
+
+	inline void pushinteger(HSquirrelVM* sqvm, const SQInteger iVal)
+	{
+		__sq_pushinteger(sqvm, iVal);
+	}
+
+	inline void pushfloat(HSquirrelVM* sqvm, const SQFloat flVal)
+	{
+		__sq_pushfloat(sqvm, flVal);
+	}
+
+	inline void pushbool(HSquirrelVM* sqvm, const SQBool bVal)
+	{
+		__sq_pushbool(sqvm, bVal);
+	}
+
+	inline void pushasset(HSquirrelVM* sqvm, const SQChar* sVal, int length = -1)
+	{
+		__sq_pushasset(sqvm, sVal, length);
+	}
+
+	inline void pushvector(HSquirrelVM* sqvm, const Vector3 pVal)
+	{
+		__sq_pushvector(sqvm, *(float**)&pVal);
+	}
+
+	inline void pushobject(HSquirrelVM* sqvm, SQObject* obj)
+	{
+		__sq_pushobject(sqvm, obj);
+	}
+
+	inline const SQChar* getstring(HSquirrelVM* sqvm, const SQInteger stackpos)
+	{
+		return __sq_getstring(sqvm, stackpos);
+	}
+
+	inline SQInteger getinteger(HSquirrelVM* sqvm, const SQInteger stackpos)
+	{
+		return __sq_getinteger(sqvm, stackpos);
+	}
+
+	inline SQFloat getfloat(HSquirrelVM* sqvm, const SQInteger stackpos)
+	{
+		return __sq_getfloat(sqvm, stackpos);
+	}
+
+	inline SQBool getbool(HSquirrelVM* sqvm, const SQInteger stackpos)
+	{
+		return __sq_getbool(sqvm, stackpos);
+	}
+
+	inline SQRESULT get(HSquirrelVM* sqvm, const SQInteger stackpos)
+	{
+		return __sq_get(sqvm, stackpos);
+	}
+
+	inline Vector3 getvector(HSquirrelVM* sqvm, const SQInteger stackpos)
+	{
+		float* pRet = __sq_getvector(sqvm, stackpos);
+		return *(Vector3*)&pRet;
+	}
+
+	inline int sq_getfunction(HSquirrelVM* sqvm, const char* name, SQObject* returnObj, const char* signature)
+	{
+		return __sq_getfunction(sqvm, name, returnObj, signature);
+	}
+
+	inline SQRESULT getasset(HSquirrelVM* sqvm, const SQInteger stackpos, const char** result)
+	{
+		return __sq_getasset(sqvm, stackpos, result);
+	}
+
+	inline long long sq_stackinfos(HSquirrelVM* sqvm, int level, SQStackInfos& out)
+	{
+		return __sq_stackinfos(sqvm, level, &out, sqvm->_callstacksize);
+	}
+
+	inline Mod* getcallingmod(HSquirrelVM* sqvm, int depth = 0)
+	{
+		SQStackInfos stackInfo {};
+		if (1 + depth >= sqvm->_callstacksize)
+		{
+			return nullptr;
+		}
+		sq_stackinfos(sqvm, 1 + depth, stackInfo);
+		std::string sourceName = stackInfo._sourceName;
+		std::replace(sourceName.begin(), sourceName.end(), '/', '\\');
+		std::string filename = "scripts\\vscripts\\" + sourceName;
+		if (auto res = g_pModManager->m_ModFiles.find(filename); res != g_pModManager->m_ModFiles.end())
+		{
+			return res->second.m_pOwningMod;
+		}
+		return nullptr;
+	}
+	template <typename T> inline SQRESULT getuserdata(HSquirrelVM* sqvm, const SQInteger stackpos, T* data, uint64_t* typeId)
+	{
+		return __sq_getuserdata(sqvm, stackpos, (void**)data, typeId); // this sometimes crashes idk
+	}
+
+	template <typename T> inline T* createuserdata(HSquirrelVM* sqvm, SQInteger size)
+	{
+		void* ret = __sq_createuserdata(sqvm, size);
+		memset(ret, 0, size);
+		return (T*)ret;
+	}
+
+	inline SQRESULT setuserdatatypeid(HSquirrelVM* sqvm, const SQInteger stackpos, uint64_t typeId)
+	{
+		return __sq_setuserdatatypeid(sqvm, stackpos, typeId);
+	}
+
+	template <typename T> inline SQBool getthisentity(HSquirrelVM* sqvm, T* ppEntity)
+	{
+		return __sq_getentity(sqvm, (void**)ppEntity);
+	}
+
+	template <typename T> inline T* getentity(HSquirrelVM* sqvm, SQInteger iStackPos)
+	{
+		SQObject obj;
+		__sq_getobject(sqvm, iStackPos, &obj);
+
+		// there are entity constants for other types, but seemingly CBaseEntity's is the only one needed
+		return (T*)__sq_getentityfrominstance(m_pSQVM, &obj, __sq_GetEntityConstant_CBaseEntity());
+	}
+#pragma endregion
+};
+
+template <ScriptContext context> class SquirrelManager : public virtual SquirrelManagerBase
+{
+  public:
+#pragma region MessageBuffer
+	SquirrelMessageBuffer* messageBuffer;
+
+	template <typename... Args> SquirrelMessage AsyncCall(std::string funcname, Args... args)
+	{
+		// This function schedules a call to be executed on the next frame
+		// This is useful for things like threads and plugins, which do not run on the main thread
+		FunctionVector functionVector;
+		SqRecurseArgs<context>(functionVector, args...);
+		SquirrelMessage message = {funcname, functionVector};
+		messageBuffer->push(message);
+		return message;
+	}
+
+	SquirrelMessage AsyncCall(std::string funcname)
+	{
+		// This function schedules a call to be executed on the next frame
+		// This is useful for things like threads and plugins, which do not run on the main thread
+		FunctionVector functionVector = {};
+		SquirrelMessage message = {funcname, functionVector};
+		messageBuffer->push(message);
+		return message;
+	}
+
+	SQRESULT Call(const char* funcname)
+	{
+		// Warning!
+		// This function assumes the squirrel VM is stopped/blocked at the moment of call
+		// Calling this function while the VM is running is likely to result in a crash due to stack destruction
+		// If you want to call into squirrel asynchronously, use `AsyncCall` instead
+
+		if (!m_pSQVM || !m_pSQVM->sqvm)
+		{
+			spdlog::error(
+				"{} was called on context {} while VM was not initialized. This will crash", __FUNCTION__, GetContextName(context));
+		}
+
+		SQObject functionobj {};
+		int result = sq_getfunction(m_pSQVM->sqvm, funcname, &functionobj, 0);
+		if (result != 0) // This func returns 0 on success for some reason
+		{
+			NS::log::squirrel_logger<context>()->error("Call was unable to find function with name '{}'. Is it global?", funcname);
+			return SQRESULT_ERROR;
+		}
+		pushobject(m_pSQVM->sqvm, &functionobj); // Push the function object
+		pushroottable(m_pSQVM->sqvm); // Push root table
+		return _call(m_pSQVM->sqvm, 0);
+	}
+
+	template <typename... Args> SQRESULT Call(const char* funcname, Args... args)
+	{
+		// Warning!
+		// This function assumes the squirrel VM is stopped/blocked at the moment of call
+		// Calling this function while the VM is running is likely to result in a crash due to stack destruction
+		// If you want to call into squirrel asynchronously, use `schedule_call` instead
+		if (!m_pSQVM || !m_pSQVM->sqvm)
+		{
+			spdlog::error(
+				"{} was called on context {} while VM was not initialized. This will crash", __FUNCTION__, GetContextName(context));
+		}
+		SQObject functionobj {};
+		int result = sq_getfunction(m_pSQVM->sqvm, funcname, &functionobj, 0);
+		if (result != 0) // This func returns 0 on success for some reason
+		{
+			NS::log::squirrel_logger<context>()->error("Call was unable to find function with name '{}'. Is it global?", funcname);
+			return SQRESULT_ERROR;
+		}
+		pushobject(m_pSQVM->sqvm, &functionobj); // Push the function object
+		pushroottable(m_pSQVM->sqvm); // Push root table
+
+		FunctionVector functionVector;
+		SqRecurseArgs<context>(functionVector, args...);
+
+		for (auto& v : functionVector)
+		{
+			// Execute lambda to push arg to stack
+			v();
+		}
+
+		return _call(m_pSQVM->sqvm, functionVector.size());
+	}
+
+#pragma endregion
+
+  public:
+	SquirrelManager()
+	{
+		m_pSQVM = nullptr;
+	}
+
+	void VMCreated(CSquirrelVM* newSqvm);
+	void VMDestroyed();
+	void ExecuteCode(const char* code);
+	void AddFuncRegistration(std::string returnType, std::string name, std::string argTypes, std::string helpText, SQFunction func);
+	SQRESULT setupfunc(const SQChar* funcname);
+	void AddFuncOverride(std::string name, SQFunction func);
+	void ProcessMessageBuffer();
+};
+
+template <ScriptContext context> SquirrelManager<context>* g_pSquirrel;
+
+void InitialiseSquirrelManagers();
+
+/*
+	Beware all ye who enter below.
+	This place is not a place of honor... no highly esteemed deed is commemorated here... nothing valued is here.
+	What is here was dangerous and repulsive to us. This message is a warning about danger.
+*/
+
+#pragma region MessageBuffer templates
+
+// Clang-formatting makes this whole thing unreadable
+// clang-format off
+
+#ifndef MessageBufferFuncs
+#define MessageBufferFuncs
+// Bools
+template <ScriptContext context, typename T>
+requires std::convertible_to<T, bool> && (!std::is_floating_point_v<T>) && (!std::convertible_to<T, std::string>) && (!std::convertible_to<T, int>)
+inline VoidFunction SQMessageBufferPushArg(T& arg) {
+	return [arg]{ g_pSquirrel<context>->pushbool(g_pSquirrel<context>->m_pSQVM->sqvm, static_cast<bool>(arg)); };
+}
+// Vectors
+template <ScriptContext context>
+inline VoidFunction SQMessageBufferPushArg(Vector3& arg) {
+	return [arg]{ g_pSquirrel<context>->pushvector(g_pSquirrel<context>->m_pSQVM->sqvm, arg); };
+}
+// Vectors
+template <ScriptContext context>
+inline VoidFunction SQMessageBufferPushArg(SQObject* arg) {
+	return [arg]{ g_pSquirrel<context>->pushSQObject(g_pSquirrel<context>->m_pSQVM->sqvm, arg); };
+}
+// Ints
+template <ScriptContext context, typename T>
+requires std::convertible_to<T, int> && (!std::is_floating_point_v<T>)
+inline VoidFunction SQMessageBufferPushArg(T& arg) {
+	return [arg]{ g_pSquirrel<context>->pushinteger(g_pSquirrel<context>->m_pSQVM->sqvm, static_cast<int>(arg)); };
+}
+// Floats
+template <ScriptContext context, typename T>
+requires std::convertible_to<T, float> && (std::is_floating_point_v<T>)
+inline VoidFunction SQMessageBufferPushArg(T& arg) {
+	return [arg]{ g_pSquirrel<context>->pushfloat(g_pSquirrel<context>->m_pSQVM->sqvm, static_cast<float>(arg)); };
+}
+// Strings
+template <ScriptContext context, typename T>
+requires (std::convertible_to<T, std::string> || std::is_constructible_v<std::string, T>)
+inline VoidFunction SQMessageBufferPushArg(T& arg) {
+	auto converted = std::string(arg);
+	return [converted]{ g_pSquirrel<context>->pushstring(g_pSquirrel<context>->m_pSQVM->sqvm, converted.c_str(), converted.length()); };
+}
+// Assets
+template <ScriptContext context>
+inline VoidFunction SQMessageBufferPushArg(SquirrelAsset& arg) {
+	return [arg]{ g_pSquirrel<context>->pushasset(g_pSquirrel<context>->m_pSQVM->sqvm, arg.path.c_str(), arg.path.length()); };
+}
+// Maps
+template <ScriptContext context, typename T>
+requires is_iterable<T>
+inline VoidFunction SQMessageBufferPushArg(T& arg) {
+	FunctionVector localv = {};
+	localv.push_back([]{g_pSquirrel<context>->newarray(g_pSquirrel<context>->m_pSQVM->sqvm, 0);});
+	
+	for (const auto& item : arg) {
+		localv.push_back(SQMessageBufferPushArg<context>(item));
+		localv.push_back([]{g_pSquirrel<context>->arrayappend(g_pSquirrel<context>->m_pSQVM->sqvm, -2);});
+	}
+
+	return [localv] { for (auto& func : localv) { func(); } };
+}
+// Vectors
+template <ScriptContext context, typename T>
+requires is_map<T>
+inline VoidFunction SQMessageBufferPushArg(T& map) {
+	FunctionVector localv = {};
+	localv.push_back([]{g_pSquirrel<context>->newtable(g_pSquirrel<context>->m_pSQVM->sqvm);});
+	
+	for (const auto& item : map) {
+		localv.push_back(SQMessageBufferPushArg<context>(item.first));
+		localv.push_back(SQMessageBufferPushArg<context>(item.second));
+		localv.push_back([]{g_pSquirrel<context>->newslot(g_pSquirrel<context>->m_pSQVM->sqvm, -3, false);});
+	}
+
+	return [localv]{ for (auto& func : localv) { func(); } };
+}
+
+template <ScriptContext context, typename T>
+inline void SqRecurseArgs(FunctionVector& v, T& arg) {
+	v.push_back(SQMessageBufferPushArg<context>(arg));
+}
+
+// This function is separated from the PushArg function so as to not generate too many template instances
+// This is the main function responsible for unrolling the argument pack
+template <ScriptContext context, typename T, typename... Args>
+inline void SqRecurseArgs(FunctionVector& v, T& arg, Args... args) {
+	v.push_back(SQMessageBufferPushArg<context>(arg));
+	SqRecurseArgs<context>(v, args...);
+}
+
+// clang-format on
+#endif
+
+#pragma endregion