Added caching for sigs

src/component/signatures.cpp

@@ -1,9 +1,75 @@
 #include <stdinc.hpp>
 #include "signatures.hpp"
 #include <utils/hook.hpp>
+#include <utils/io.hpp>
+#include <utils/string.hpp>
+#include <json.hpp>
 
 namespace signatures
 {
+	std::string read_sigs_file()
+	{
+		return utils::io::read_file("t4sp-server-plugin/sigs.json");
+	}
+
+	bool write_sigs_file(const std::string& f)
+	{
+		return utils::io::write_file("t4sp-server-plugin/sigs.json", f);
+	}
+
+	const char* get_current_version()
+	{
+		return *reinterpret_cast<const char**>(0x4FF72D + 4);
+	}
+
+	std::unordered_map<std::string, std::string> get_cache_info_for_our_version()
+	{
+		std::unordered_map<std::string, std::string> answer;
+
+		auto* version = get_current_version();
+
+		nlohmann::json cache_json = nlohmann::json::parse(read_sigs_file(), nullptr, false, true);
+		if (!cache_json.is_discarded() && cache_json.is_object())
+		{
+			for (const auto& [key, value] : cache_json.items())
+			{
+				if (key != version)
+				{
+					continue;
+				}
+
+				if (!value.is_object())
+				{
+					continue;
+				}
+
+				answer = value.get<std::unordered_map<std::string, std::string>>();
+				break;
+			}
+		}
+
+		return answer;
+	}
+
+	bool save_cache_info_for_our_version(const std::unordered_map<std::string, std::string>& cache_info)
+	{
+		auto* version = get_current_version();
+
+		nlohmann::json cache_json = nlohmann::json::parse(read_sigs_file(), nullptr, false, true);
+		if (cache_json.is_discarded() || !cache_json.is_object())
+		{
+			cache_json = nlohmann::json::parse("{}", nullptr, false, true);
+
+			if (cache_json.is_discarded() || !cache_json.is_object())
+			{
+				return false; // can't happen?
+			}
+		}
+
+		cache_json[version] = cache_info;
+		return write_sigs_file(cache_json.dump());
+	}
+
 	size_t load_image_size()
 	{
 		MODULEINFO info{};
@@ -53,6 +119,14 @@ namespace signatures
 
 	bool process_printf()
 	{
+		auto cache_info = get_cache_info_for_our_version();
+
+		if (cache_info.contains("printf"))
+		{
+			game::plutonium::printf.set(std::atoi(cache_info.at("printf").c_str()));
+			return true;
+		}
+
 		const auto string_ref = find_string_ref("A critical exception occured!\n");
 		if (!string_ref)
 		{
@@ -62,6 +136,9 @@ namespace signatures
 		const auto offset = *reinterpret_cast<size_t*>(string_ref + 5);
 		game::plutonium::printf.set(string_ref + 4 + 5 + offset);
 
+		cache_info.insert_or_assign("printf", std::to_string(string_ref + 4 + 5 + offset));
+		save_cache_info_for_our_version(cache_info);
+
 		return true;
 	}
 

src/stdinc.hpp

@@ -8,6 +8,7 @@
 #pragma warning(disable: 28182)
 
 #pragma warning(disable: 4324)
+#pragma warning(disable: 4459)
 
 #define DLL_EXPORT extern "C" __declspec(dllexport)
 #define WIN32_LEAN_AND_MEAN