Initial commit

src/utils/concurrent_list.hpp

@@ -0,0 +1,144 @@
+#pragma once
+
+#include <mutex>
+#include <memory>
+
+// This class is trash. Need to get rid of it.
+
+namespace utils
+{
+	template <typename T>
+	class concurrent_list final
+	{
+	public:
+		class element final
+		{
+		public:
+			explicit element(std::recursive_mutex* mutex, std::shared_ptr<T> entry = {},
+			                 std::shared_ptr<element> next = {}) :
+				mutex_(mutex),
+				entry_(std::move(entry)),
+				next_(std::move(next))
+			{
+			}
+
+			void remove(const std::shared_ptr<T>& element)
+			{
+				std::lock_guard<std::recursive_mutex> _(*this->mutex_);
+				if (!this->next_) return;
+
+				if (this->next_->entry_.get() == element.get())
+				{
+					this->next_ = this->next_->next_;
+				}
+				else
+				{
+					this->next_->remove(element);
+				}
+			}
+
+			[[nodiscard]] std::shared_ptr<element> get_next() const
+			{
+				std::lock_guard<std::recursive_mutex> _(*this->mutex_);
+				return this->next_;
+			}
+
+			std::shared_ptr<T> operator*() const
+			{
+				std::lock_guard<std::recursive_mutex> _(*this->mutex_);
+				return this->entry_;
+			}
+
+			element& operator++()
+			{
+				std::lock_guard<std::recursive_mutex> _(*this->mutex_);
+				*this = this->next_ ? *this->next_ : element(this->mutex_);
+				return *this;
+			}
+
+			element operator++(int)
+			{
+				std::lock_guard<std::recursive_mutex> _(*this->mutex_);
+				auto result = *this;
+				this->operator++();
+				return result;
+			}
+
+			bool operator==(const element& other)
+			{
+				std::lock_guard<std::recursive_mutex> _(*this->mutex_);
+				return this->entry_.get() == other.entry_.get();
+			}
+
+			bool operator!=(const element& other)
+			{
+				std::lock_guard<std::recursive_mutex> _(*this->mutex_);
+				return !(*this == other);
+			}
+
+		private:
+			std::recursive_mutex* mutex_;
+			std::shared_ptr<T> entry_;
+			std::shared_ptr<element> next_;
+		};
+
+		element begin()
+		{
+			std::lock_guard<std::recursive_mutex> _(this->mutex_);
+			return this->entry_ ? *this->entry_ : this->end();
+		}
+
+		element end()
+		{
+			std::lock_guard<std::recursive_mutex> _(this->mutex_);
+			return element(&this->mutex_);
+		}
+
+		void remove(const element& entry)
+		{
+			std::lock_guard<std::recursive_mutex> _(this->mutex_);
+			this->remove(*entry);
+		}
+
+		void remove(const std::shared_ptr<T>& element)
+		{
+			std::lock_guard<std::recursive_mutex> _(this->mutex_);
+			if (!this->entry_) return;
+
+			if ((**this->entry_).get() == element.get())
+			{
+				this->entry_ = this->entry_->get_next();
+			}
+			else
+			{
+				this->entry_->remove(element);
+			}
+		}
+
+		void add(const T& object)
+		{
+			std::lock_guard<std::recursive_mutex> _(this->mutex_);
+
+			const auto object_ptr = std::make_shared<T>(object);
+			this->entry_ = std::make_shared<element>(&this->mutex_, object_ptr, this->entry_);
+		}
+
+		void add(T&& object)
+		{
+			std::lock_guard<std::recursive_mutex> _(this->mutex_);
+
+			const auto object_ptr = std::make_shared<T>(std::move(object));
+			this->entry_ = std::make_shared<element>(&this->mutex_, object_ptr, this->entry_);
+		}
+
+		void clear()
+		{
+			std::lock_guard<std::recursive_mutex> _(this->mutex_);
+			this->entry_ = {};
+		}
+
+	private:
+		std::recursive_mutex mutex_;
+		std::shared_ptr<element> entry_;
+	};
+}

src/utils/hook.cpp

@@ -0,0 +1,180 @@
+#include <stdinc.hpp>
+
+// iw6x-client
+
+namespace utils::hook
+{
+	namespace
+	{
+		[[maybe_unused]] class _
+		{
+		public:
+			_()
+			{
+				if (MH_Initialize() != MH_OK)
+				{
+					throw std::runtime_error("Failed to initialize MinHook");
+				}
+			}
+
+			~_()
+			{
+				MH_Uninitialize();
+			}
+		} __;
+	}
+
+	detour::detour(const size_t place, void* target) : detour(reinterpret_cast<void*>(place), target)
+	{
+	}
+
+	detour::detour(void* place, void* target)
+	{
+		this->create(place, target);
+	}
+
+	detour::~detour()
+	{
+		this->clear();
+	}
+
+	void detour::enable() const
+	{
+		MH_EnableHook(this->place_);
+	}
+
+	void detour::disable() const
+	{
+		MH_DisableHook(this->place_);
+	}
+
+	void detour::create(void* place, void* target)
+	{
+		this->clear();
+		this->place_ = place;
+
+		if (MH_CreateHook(this->place_, target, &this->original_) != MH_OK)
+		{
+			throw std::runtime_error(string::va("Unable to create hook at location: %p", this->place_));
+		}
+
+		this->enable();
+	}
+
+	void detour::create(const size_t place, void* target)
+	{
+		this->create(reinterpret_cast<void*>(place), target);
+	}
+
+	void detour::clear()
+	{
+		if (this->place_)
+		{
+			MH_RemoveHook(this->place_);
+		}
+
+		this->place_ = nullptr;
+		this->original_ = nullptr;
+	}
+
+	void* detour::get_original() const
+	{
+		return this->original_;
+	}
+
+	void nop(void* place, const size_t length)
+	{
+		DWORD old_protect{};
+		VirtualProtect(place, length, PAGE_EXECUTE_READWRITE, &old_protect);
+
+		std::memset(place, 0x90, length);
+
+		VirtualProtect(place, length, old_protect, &old_protect);
+		FlushInstructionCache(GetCurrentProcess(), place, length);
+	}
+
+	void nop(const size_t place, const size_t length)
+	{
+		nop(reinterpret_cast<void*>(place), length);
+	}
+
+	void copy(void* place, const void* data, const size_t length)
+	{
+		DWORD old_protect{};
+		VirtualProtect(place, length, PAGE_EXECUTE_READWRITE, &old_protect);
+
+		std::memmove(place, data, length);
+
+		VirtualProtect(place, length, old_protect, &old_protect);
+		FlushInstructionCache(GetCurrentProcess(), place, length);
+	}
+
+	void copy(const size_t place, const void* data, const size_t length)
+	{
+		copy(reinterpret_cast<void*>(place), data, length);
+	}
+
+	bool is_relatively_far(const void* pointer, const void* data, int offset)
+	{
+		const int64_t diff = size_t(data) - (size_t(pointer) + offset);
+		const auto small_diff = int32_t(diff);
+		return diff != int64_t(small_diff);
+	}
+
+	void call(void* pointer, void* data)
+	{
+		if (is_relatively_far(pointer, data))
+		{
+			throw std::runtime_error("Too far away to create 32bit relative branch");
+		}
+
+		auto* patch_pointer = PBYTE(pointer);
+		set<uint8_t>(patch_pointer, 0xE8);
+		set<int32_t>(patch_pointer + 1, int32_t(size_t(data) - (size_t(pointer) + 5)));
+	}
+
+	void call(const size_t pointer, void* data)
+	{
+		return call(reinterpret_cast<void*>(pointer), data);
+	}
+
+	void call(const size_t pointer, const size_t data)
+	{
+		return call(pointer, reinterpret_cast<void*>(data));
+	}
+
+	void set(std::uintptr_t address, std::vector<std::uint8_t>&& bytes)
+	{
+		DWORD oldProtect = 0;
+
+		auto* place = reinterpret_cast<void*>(address);
+		VirtualProtect(place, bytes.size(), PAGE_EXECUTE_READWRITE, &oldProtect);
+		memcpy(place, bytes.data(), bytes.size());
+		VirtualProtect(place, bytes.size(), oldProtect, &oldProtect);
+		FlushInstructionCache(GetCurrentProcess(), place, bytes.size());
+	}
+
+	void set(std::uintptr_t address, void* buffer, size_t size)
+	{
+		DWORD oldProtect = 0;
+
+		auto* place = reinterpret_cast<void*>(address);
+		VirtualProtect(place, size, PAGE_EXECUTE_READWRITE, &oldProtect);
+		memcpy(place, buffer, size);
+		VirtualProtect(place, size, oldProtect, &oldProtect);
+		FlushInstructionCache(GetCurrentProcess(), place, size);
+	}
+
+	void jump(std::uintptr_t address, void* destination)
+	{
+		if (!address) return;
+
+		std::uint8_t* bytes = new std::uint8_t[5];
+		*bytes = 0xE9;
+		*reinterpret_cast<std::uint32_t*>(bytes + 1) = CalculateRelativeJMPAddress(address, destination);
+
+		set(address, bytes, 5);
+
+		delete[] bytes;
+	}
+}

src/utils/hook.hpp

@@ -0,0 +1,116 @@
+#pragma once
+
+#define CalculateRelativeJMPAddress(X, Y) (((std::uintptr_t)Y - (std::uintptr_t)X) - 5)
+
+namespace utils::hook
+{
+	class detour
+	{
+	public:
+		detour() = default;
+		detour(void* place, void* target);
+		detour(size_t place, void* target);
+		~detour();
+
+		detour(detour&& other) noexcept
+		{
+			this->operator=(std::move(other));
+		}
+
+		detour& operator= (detour&& other) noexcept
+		{
+			if (this != &other)
+			{
+				this->~detour();
+
+				this->place_ = other.place_;
+				this->original_ = other.original_;
+
+				other.place_ = nullptr;
+				other.original_ = nullptr;
+			}
+
+			return *this;
+		}
+
+		detour(const detour&) = delete;
+		detour& operator= (const detour&) = delete;
+
+		void enable() const;
+		void disable() const;
+
+		void create(void* place, void* target);
+		void create(size_t place, void* target);
+		void clear();
+
+		template <typename T>
+		T* get() const
+		{
+			return static_cast<T*>(this->get_original());
+		}
+
+		template <typename T, typename... Args>
+		T invoke(Args... args)
+		{
+			return static_cast<T(*)(Args ...)>(this->get_original())(args...);
+		}
+
+		[[nodiscard]] void* get_original() const;
+
+	private:
+		void* place_{};
+		void* original_{};
+	};
+
+	void nop(void* place, size_t length);
+	void nop(size_t place, size_t length);
+
+	void copy(void* place, const void* data, size_t length);
+	void copy(size_t place, const void* data, size_t length);
+
+	bool is_relatively_far(const void* pointer, const void* data, int offset = 5);
+
+	void call(void* pointer, void* data);
+	void call(size_t pointer, void* data);
+	void call(size_t pointer, size_t data);
+
+	void jump(std::uintptr_t address, void* destination);
+
+	template <typename T>
+	T extract(void* address)
+	{
+		const auto data = static_cast<uint8_t*>(address);
+		const auto offset = *reinterpret_cast<int32_t*>(data);
+		return  reinterpret_cast<T>(data + offset + 4);
+	}
+
+	template <typename T>
+	static void set(void* place, T value)
+	{
+		DWORD old_protect;
+		VirtualProtect(place, sizeof(T), PAGE_EXECUTE_READWRITE, &old_protect);
+
+		*static_cast<T*>(place) = value;
+
+		VirtualProtect(place, sizeof(T), old_protect, &old_protect);
+		FlushInstructionCache(GetCurrentProcess(), place, sizeof(T));
+	}
+
+	template <typename T>
+	static void set(const size_t place, T value)
+	{
+		return set<T>(reinterpret_cast<void*>(place), value);
+	}
+
+	template <typename T, typename... Args>
+	static T invoke(size_t func, Args... args)
+	{
+		return reinterpret_cast<T(*)(Args ...)>(func)(args...);
+	}
+
+	template <typename T, typename... Args>
+	static T invoke(void* func, Args... args)
+	{
+		return static_cast<T(*)(Args ...)>(func)(args...);
+	}
+}

src/utils/io.cpp

@@ -0,0 +1,112 @@
+#include <stdinc.hpp>
+#include <fstream>
+
+namespace utils::io
+{
+	bool file_exists(const std::string& file)
+	{
+		return std::ifstream(file).good();
+	}
+
+	bool write_file(const std::string& file, const std::string& data, const bool append)
+	{
+		const auto pos = file.find_last_of("/\\");
+		if (pos != std::string::npos)
+		{
+			create_directory(file.substr(0, pos));
+		}
+
+		std::ofstream stream(
+			file, std::ios::binary | std::ofstream::out | (append ? std::ofstream::app : 0));
+
+		if (stream.is_open())
+		{
+			stream.write(data.data(), data.size());
+			stream.close();
+			return true;
+		}
+
+		return false;
+	}
+
+	std::string read_file(const std::string& file)
+	{
+		std::string data;
+		read_file(file, &data);
+		return data;
+	}
+
+	bool read_file(const std::string& file, std::string* data)
+	{
+		if (!data) return false;
+		data->clear();
+
+		if (file_exists(file))
+		{
+			std::ifstream stream(file, std::ios::binary);
+			if (!stream.is_open()) return false;
+
+			stream.seekg(0, std::ios::end);
+			const std::streamsize size = stream.tellg();
+			stream.seekg(0, std::ios::beg);
+
+			if (size > -1)
+			{
+				data->resize(static_cast<uint32_t>(size));
+				stream.read(const_cast<char*>(data->data()), size);
+				stream.close();
+				return true;
+			}
+		}
+
+		return false;
+	}
+
+	size_t file_size(const std::string& file)
+	{
+		if (file_exists(file))
+		{
+			std::ifstream stream(file, std::ios::binary);
+
+			if (stream.good())
+			{
+				stream.seekg(0, std::ios::end);
+				return static_cast<size_t>(stream.tellg());
+			}
+		}
+
+		return 0;
+	}
+
+	bool create_directory(const std::string& directory)
+	{
+		return std::filesystem::create_directories(directory);
+	}
+
+	bool directory_exists(const std::string& directory)
+	{
+		return std::filesystem::is_directory(directory);
+	}
+
+	bool directory_is_empty(const std::string& directory)
+	{
+		return std::filesystem::is_empty(directory);
+	}
+
+	std::vector<std::string> list_files(const std::string& directory)
+	{
+		std::vector<std::string> files;
+
+		for (auto& file : std::filesystem::directory_iterator(directory))
+		{
+			files.push_back(file.path().generic_string());
+		}
+
+		return files;
+	}
+
+	void copy_folder(const std::filesystem::path& src, const std::filesystem::path& target)
+	{
+		std::filesystem::copy(src, target, std::filesystem::copy_options::overwrite_existing | std::filesystem::copy_options::recursive);
+	}
+}

src/utils/io.hpp

@@ -0,0 +1,19 @@
+#pragma once
+
+#include <string>
+#include <vector>
+#include <filesystem>
+
+namespace utils::io
+{
+	bool file_exists(const std::string& file);
+	bool write_file(const std::string& file, const std::string& data, bool append = false);
+	bool read_file(const std::string& file, std::string* data);
+	std::string read_file(const std::string& file);
+	size_t file_size(const std::string& file);
+	bool create_directory(const std::string& directory);
+	bool directory_exists(const std::string& directory);
+	bool directory_is_empty(const std::string& directory);
+	std::vector<std::string> list_files(const std::string& directory);
+	void copy_folder(const std::filesystem::path& src, const std::filesystem::path& target);
+}

src/utils/memory.cpp

@@ -0,0 +1,112 @@
+// https://github.com/momo5502/open-iw5
+
+#include <stdinc.hpp>
+
+namespace utils
+{
+	memory::allocator memory::mem_allocator_;
+
+	memory::allocator::~allocator()
+	{
+		this->clear();
+	}
+
+	void memory::allocator::clear()
+	{
+		std::lock_guard _(this->mutex_);
+
+		for (auto& data : this->pool_)
+		{
+			memory::free(data);
+		}
+
+		this->pool_.clear();
+	}
+
+	void memory::allocator::free(void* data)
+	{
+		std::lock_guard _(this->mutex_);
+
+		const auto j = std::find(this->pool_.begin(), this->pool_.end(), data);
+		if (j != this->pool_.end())
+		{
+			memory::free(data);
+			this->pool_.erase(j);
+		}
+	}
+
+	void memory::allocator::free(const void* data)
+	{
+		this->free(const_cast<void*>(data));
+	}
+
+	void* memory::allocator::allocate(const size_t length)
+	{
+		std::lock_guard _(this->mutex_);
+
+		const auto data = memory::allocate(length);
+		this->pool_.push_back(data);
+		return data;
+	}
+
+	bool memory::allocator::empty() const
+	{
+		return this->pool_.empty();
+	}
+
+	/*char* memory::allocator::duplicate_string(const std::string& string)
+	{
+		std::lock_guard _(this->mutex_);
+
+		const auto data = memory::duplicate_string(string);
+		this->pool_.push_back(data);
+		return data;
+	}*/
+
+	void* memory::allocate(const size_t length)
+	{
+		const auto data = calloc(length, 1);
+		assert(data != nullptr);
+		return data;
+	}
+
+	/*char* memory::duplicate_string(const std::string& string)
+	{
+		const auto new_string = allocate_array<char>(string.size() + 1);
+		std::memcpy(new_string, string.data(), string.size());
+		return new_string;
+	}*/
+
+	void memory::free(void* data)
+	{
+		if (data)
+		{
+			::free(data);
+		}
+	}
+
+	void memory::free(const void* data)
+	{
+		free(const_cast<void*>(data));
+	}
+
+	bool memory::is_set(const void* mem, const char chr, const size_t length)
+	{
+		const auto mem_arr = static_cast<const char*>(mem);
+
+		for (size_t i = 0; i < length; ++i)
+		{
+			if (mem_arr[i] != chr)
+			{
+				return false;
+			}
+		}
+
+		return true;
+	}
+
+	memory::allocator* memory::get_allocator()
+	{
+		return &memory::mem_allocator_;
+	}
+}

src/utils/memory.hpp

@@ -0,0 +1,70 @@
+// https://github.com/momo5502/open-iw5
+
+#pragma once
+
+namespace utils
+{
+	class memory final
+	{
+	public:
+		class allocator final
+		{
+		public:
+			~allocator();
+
+			void clear();
+
+			void free(void* data);
+
+			void free(const void* data);
+
+			void* allocate(size_t length);
+
+			template <typename T>
+			T* allocate()
+			{
+				return this->allocate_array<T>(1);
+			}
+
+			template <typename T>
+			T* allocate_array(const size_t count = 1)
+			{
+				return static_cast<T*>(this->allocate(count * sizeof(T)));
+			}
+
+			bool empty() const;
+
+			//char* duplicate_string(const std::string& string);
+
+		private:
+			std::mutex mutex_;
+			std::vector<void*> pool_;
+		};
+
+		static void* allocate(size_t length);
+
+		template <typename T>
+		static inline T* allocate()
+		{
+			return allocate_array<T>(1);
+		}
+
+		template <typename T>
+		static inline T* allocate_array(const size_t count = 1)
+		{
+			return static_cast<T*>(allocate(count * sizeof(T)));
+		}
+
+		//static char* duplicate_string(const std::string& string);
+
+		static void free(void* data);
+		static void free(const void* data);
+
+		static bool is_set(const void* mem, char chr, size_t length);
+
+		static allocator* get_allocator();
+
+	private:
+		static allocator mem_allocator_;
+	};
+}

src/utils/string.cpp

@@ -0,0 +1,151 @@
+#include <stdinc.hpp>
+
+namespace utils::string
+{
+	const char* va(const char* fmt, ...)
+	{
+		static thread_local va_provider<8, 256> provider;
+
+		va_list ap;
+		va_start(ap, fmt);
+
+		const char* result = provider.get(fmt, ap);
+
+		va_end(ap);
+		return result;
+	}
+
+	std::vector<std::string> split(const std::string& s, const char delim)
+	{
+		std::stringstream ss(s);
+		std::string item;
+		std::vector<std::string> elems;
+
+		while (std::getline(ss, item, delim))
+		{
+			elems.push_back(item); // elems.push_back(std::move(item)); // if C++11 (based on comment from @mchiasson)
+		}
+
+		return elems;
+	}
+
+	std::string to_lower(std::string text)
+	{
+		std::transform(text.begin(), text.end(), text.begin(), [](const char input)
+		{
+			return static_cast<char>(tolower(input));
+		});
+
+		return text;
+	}
+
+	std::string to_upper(std::string text)
+	{
+		std::transform(text.begin(), text.end(), text.begin(), [](const char input)
+		{
+			return static_cast<char>(toupper(input));
+		});
+
+		return text;
+	}
+
+	bool starts_with(const std::string& text, const std::string& substring)
+	{
+		return text.find(substring) == 0;
+	}
+
+	bool ends_with(const std::string& text, const std::string& substring)
+	{
+		if (substring.size() > text.size()) return false;
+		return std::equal(substring.rbegin(), substring.rend(), text.rbegin());
+	}
+
+	std::string dump_hex(const std::string& data, const std::string& separator)
+	{
+		std::string result;
+
+		for (unsigned int i = 0; i < data.size(); ++i)
+		{
+			if (i > 0)
+			{
+				result.append(separator);
+			}
+
+			result.append(va("%02X", data[i] & 0xFF));
+		}
+
+		return result;
+	}
+
+	void strip(const char* in, char* out, int max)
+	{
+		if (!in || !out) return;
+
+		max--;
+		auto current = 0;
+		while (*in != 0 && current < max)
+		{
+			const auto color_index = (*(in + 1) - 48) >= 0xC ? 7 : (*(in + 1) - 48);
+
+			if (*in == '^' && (color_index != 7 || *(in + 1) == '7'))
+			{
+				++in;
+			}
+			else
+			{
+				*out = *in;
+				++out;
+				++current;
+			}
+
+			++in;
+		}
+		*out = '\0';
+	}
+
+#pragma warning(push)
+#pragma warning(disable: 4100)
+	std::string convert(const std::wstring& wstr)
+	{
+		std::string result;
+		result.reserve(wstr.size());
+
+		for (const auto& chr : wstr)
+		{
+			result.push_back(static_cast<char>(chr));
+		}
+
+		return result;
+	}
+
+	std::wstring convert(const std::string& str)
+	{
+		std::wstring result;
+		result.reserve(str.size());
+
+		for (const auto& chr : str)
+		{
+			result.push_back(static_cast<wchar_t>(chr));
+		}
+
+		return result;
+	}
+#pragma warning(pop)
+
+	std::string replace(std::string str, const std::string& from, const std::string& to)
+	{
+		if (from.empty())
+		{
+			return str;
+		}
+
+		size_t start_pos = 0;
+		while ((start_pos = str.find(from, start_pos)) != std::string::npos)
+		{
+			str.replace(start_pos, from.length(), to);
+			start_pos += to.length();
+		}
+
+		return str;
+	}
+}

src/utils/string.hpp

@@ -0,0 +1,98 @@
+#pragma once
+#include "memory.hpp"
+#include <cstdint>
+
+#ifndef ARRAYSIZE
+template <class Type, size_t n>
+size_t ARRAYSIZE(Type(&)[n]) { return n; }
+#endif
+
+namespace utils::string
+{
+	template <size_t Buffers, size_t MinBufferSize>
+	class va_provider final
+	{
+	public:
+		static_assert(Buffers != 0 && MinBufferSize != 0, "Buffers and MinBufferSize mustn't be 0");
+
+		va_provider() : current_buffer_(0)
+		{
+		}
+
+		char* get(const char* format, const va_list ap)
+		{
+			++this->current_buffer_ %= ARRAYSIZE(this->string_pool_);
+			auto entry = &this->string_pool_[this->current_buffer_];
+
+			if (!entry->size || !entry->buffer)
+			{
+				throw std::runtime_error("String pool not initialized");
+			}
+
+			while (true)
+			{
+				const int res = vsnprintf_s(entry->buffer, entry->size, _TRUNCATE, format, ap);
+				if (res > 0) break; // Success
+				if (res == 0) return nullptr; // Error
+
+				entry->double_size();
+			}
+
+			return entry->buffer;
+		}
+
+	private:
+		class entry final
+		{
+		public:
+			explicit entry(const size_t _size = MinBufferSize) : size(_size), buffer(nullptr)
+			{
+				if (this->size < MinBufferSize) this->size = MinBufferSize;
+				this->allocate();
+			}
+
+			~entry()
+			{
+				if (this->buffer) memory::get_allocator()->free(this->buffer);
+				this->size = 0;
+				this->buffer = nullptr;
+			}
+
+			void allocate()
+			{
+				if (this->buffer) memory::get_allocator()->free(this->buffer);
+				this->buffer = memory::get_allocator()->allocate_array<char>(this->size + 1);
+			}
+
+			void double_size()
+			{
+				this->size *= 2;
+				this->allocate();
+			}
+
+			size_t size;
+			char* buffer;
+		};
+
+		size_t current_buffer_;
+		entry string_pool_[Buffers];
+	};
+
+	const char* va(const char* fmt, ...);
+
+	std::vector<std::string> split(const std::string& s, char delim);
+
+	std::string to_lower(std::string text);
+	std::string to_upper(std::string text);
+	bool starts_with(const std::string& text, const std::string& substring);
+	bool ends_with(const std::string& text, const std::string& substring);
+
+	std::string dump_hex(const std::string& data, const std::string& separator = " ");
+
+	void strip(const char* in, char* out, int max);
+
+	std::string convert(const std::wstring& wstr);
+	std::wstring convert(const std::string& str);
+
+	std::string replace(std::string str, const std::string& from, const std::string& to);
+}