Add support to define function signatures in gamedata

A "Functions" section is parsed in gamedata files that allow you to define the signature of functions including metadata like the calling convention and specifying the register an argument is passed in.
A new native DHookCreateFromConf can be used to setup a hook or detour from one of that function sections in the "Functions" section.

signatures.h

@@ -0,0 +1,41 @@
+#ifndef _INCLUDE_SIGNATURES_H_
+#define _INCLUDE_SIGNATURES_H_
+
+#include "extension.h"
+#include "util.h"
+#include <am-string.h>
+#include <sm_stringhashmap.h>
+
+class SignatureWrapper {
+public:
+	ke::AString signature;
+	ke::AString address;
+	ke::AString offset;
+	StringHashMap<ParamInfo> args;
+	CallingConvention callConv;
+	HookType hookType;
+	ReturnType retType;
+	ThisPointerType thisType;
+};
+
+class SignatureGameConfig : public ITextListener_SMC {
+public:
+	SignatureWrapper *GetFunctionSignature(const char *function);
+public:
+	//ITextListener_SMC
+	SMCResult ReadSMC_NewSection(const SMCStates *states, const char *name);
+	SMCResult ReadSMC_KeyValue(const SMCStates *states, const char *key, const char *value);
+	SMCResult ReadSMC_LeavingSection(const SMCStates *states);
+	void ReadSMC_ParseStart();
+
+private:
+	ReturnType GetReturnTypeFromString(const char *str);
+	HookParamType GetHookParamTypeFromString(const char *str);
+	Register_t GetCustomRegisterFromString(const char *str);
+
+private:
+	StringHashMap<SignatureWrapper *> signatures_;
+};
+
+extern SignatureGameConfig *g_pSignatures;
+#endif