style(miscellaneous): add comments to the file system operation functions

Redcraft.Utility/Source/Private/Miscellaneous/Console.cpp

@@ -0,0 +1,462 @@
+#include "Miscellaneous/Console.h"
+
+#include <cstdio>
+
+#if PLATFORM_WINDOWS
+#	undef TEXT
+#	include <windows.h>
+#elif PLATFORM_LINUX
+#	include <sys/ioctl.h>
+#	include <unistd.h>
+#endif
+
+NAMESPACE_REDCRAFT_BEGIN
+NAMESPACE_MODULE_BEGIN(Redcraft)
+NAMESPACE_MODULE_BEGIN(Utility)
+
+#if PLATFORM_WINDOWS
+
+NODISCARD bool InitANSIConsole()
+{
+	static bool bResult = []
+	{
+		HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
+
+		if (Console == INVALID_HANDLE_VALUE) return false;
+
+		DWORD ConsoleMode = 0;
+
+		if (!GetConsoleMode(Console, &ConsoleMode)) return false;
+
+		ConsoleMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
+
+		if (!SetConsoleMode(Console, ConsoleMode)) return false;
+
+		return true;
+	}
+	();
+
+	return bResult;
+}
+
+#endif
+
+EColor GForegroundColor = EColor::Default;
+EColor GBackgroundColor = EColor::Default;
+
+EColor GetForegroundColor()
+{
+#	if PLATFORM_WINDOWS
+	{
+		if (InitANSIConsole()) return GForegroundColor;
+
+		const HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
+
+		if (Console == INVALID_HANDLE_VALUE) return EColor::Default;
+
+		CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
+
+		if (!GetConsoleScreenBufferInfo(Console, &ConsoleInfo)) return EColor::Default;
+
+		const WORD Color = ConsoleInfo.wAttributes;
+
+		EColor Result = EColor::Black;
+
+		if (Color & FOREGROUND_RED)       Result |= EColor::Red;
+		if (Color & FOREGROUND_GREEN)     Result |= EColor::Green;
+		if (Color & FOREGROUND_BLUE)      Result |= EColor::Blue;
+		if (Color & FOREGROUND_INTENSITY) Result |= EColor::Intensity;
+
+		return Result;
+	}
+#	endif
+
+	return GForegroundColor;
+}
+
+EColor GetBackgroundColor()
+{
+#	if PLATFORM_WINDOWS
+	{
+		if (InitANSIConsole()) return GBackgroundColor;
+
+		const HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
+
+		if (Console == INVALID_HANDLE_VALUE) return EColor::Default;
+
+		CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
+
+		if (!GetConsoleScreenBufferInfo(Console, &ConsoleInfo)) return EColor::Default;
+
+		const WORD Color = ConsoleInfo.wAttributes;
+
+		EColor Result = EColor::Black;
+
+		if (Color & BACKGROUND_RED)       Result |= EColor::Red;
+		if (Color & BACKGROUND_GREEN)     Result |= EColor::Green;
+		if (Color & BACKGROUND_BLUE)      Result |= EColor::Blue;
+		if (Color & BACKGROUND_INTENSITY) Result |= EColor::Intensity;
+
+		return Result;
+	}
+#	endif
+
+	return GBackgroundColor;
+}
+
+EColor SetForegroundColor(EColor InColor)
+{
+	if (IsOutputRedirected()) return GetForegroundColor();
+
+#	if PLATFORM_WINDOWS
+	{
+		if (!InitANSIConsole())
+		{
+			const HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
+
+			if (Console == INVALID_HANDLE_VALUE) return GetForegroundColor();
+
+			CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
+
+			if (!GetConsoleScreenBufferInfo(Console, &ConsoleInfo)) return GetForegroundColor();
+
+			WORD Color = ConsoleInfo.wAttributes & ~(FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE | FOREGROUND_INTENSITY);
+
+			if (InColor == EColor::Default) InColor = EColor::White;
+
+			if (!!(InColor & EColor::Red))       Color |= FOREGROUND_RED;
+			if (!!(InColor & EColor::Green))     Color |= FOREGROUND_GREEN;
+			if (!!(InColor & EColor::Blue))      Color |= FOREGROUND_BLUE;
+			if (!!(InColor & EColor::Intensity)) Color |= FOREGROUND_INTENSITY;
+
+			if (!SetConsoleTextAttribute(Console, Color)) return GetForegroundColor();
+
+			return InColor;
+		}
+	}
+#	endif
+
+#	if PLATFORM_WINDOWS || PLATFORM_LINUX
+	{
+		int Result;
+
+		switch (InColor)
+		{
+		case EColor::Black:         Result = std::fputs("\033[30m", stdout); break;
+		case EColor::Red:           Result = std::fputs("\033[31m", stdout); break;
+		case EColor::Green:         Result = std::fputs("\033[32m", stdout); break;
+		case EColor::Yellow:        Result = std::fputs("\033[33m", stdout); break;
+		case EColor::Blue:          Result = std::fputs("\033[34m", stdout); break;
+		case EColor::Magenta:       Result = std::fputs("\033[35m", stdout); break;
+		case EColor::Cyan:          Result = std::fputs("\033[36m", stdout); break;
+		case EColor::White:         Result = std::fputs("\033[37m", stdout); break;
+		case EColor::BrightBlack:   Result = std::fputs("\033[90m", stdout); break;
+		case EColor::BrightRed:     Result = std::fputs("\033[91m", stdout); break;
+		case EColor::BrightGreen:   Result = std::fputs("\033[92m", stdout); break;
+		case EColor::BrightYellow:  Result = std::fputs("\033[93m", stdout); break;
+		case EColor::BrightBlue:    Result = std::fputs("\033[94m", stdout); break;
+		case EColor::BrightMagenta: Result = std::fputs("\033[95m", stdout); break;
+		case EColor::BrightCyan:    Result = std::fputs("\033[96m", stdout); break;
+		case EColor::BrightWhite:   Result = std::fputs("\033[97m", stdout); break;
+		default:                    Result = std::fputs("\033[39m", stdout); break;
+		}
+
+		if (Result == EOF) return GetForegroundColor();
+
+		return GForegroundColor = InColor;
+	}
+#	endif
+
+	return GetForegroundColor();
+}
+
+EColor SetBackgroundColor(EColor InColor)
+{
+	if (IsOutputRedirected()) return GetBackgroundColor();
+
+#	if PLATFORM_WINDOWS
+	{
+		if (!InitANSIConsole())
+		{
+			const HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
+
+			if (Console == INVALID_HANDLE_VALUE) return GetBackgroundColor();
+
+			CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
+
+			if (!GetConsoleScreenBufferInfo(Console, &ConsoleInfo)) return GetBackgroundColor();
+
+			WORD Color = ConsoleInfo.wAttributes & ~(BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE | BACKGROUND_INTENSITY);
+
+			if (InColor == EColor::Default) InColor = EColor::Black;
+
+			if (!!(InColor & EColor::Red))       Color |= BACKGROUND_RED;
+			if (!!(InColor & EColor::Green))     Color |= BACKGROUND_GREEN;
+			if (!!(InColor & EColor::Blue))      Color |= BACKGROUND_BLUE;
+			if (!!(InColor & EColor::Intensity)) Color |= BACKGROUND_INTENSITY;
+
+			if (!SetConsoleTextAttribute(Console, Color)) return GetBackgroundColor();
+
+			return InColor;
+		}
+	}
+#	endif
+
+#	if PLATFORM_WINDOWS || PLATFORM_LINUX
+	{
+		int Result;
+
+		switch (InColor)
+		{
+		case EColor::Black:         Result = std::fputs("\033[40m",  stdout); break;
+		case EColor::Red:           Result = std::fputs("\033[41m",  stdout); break;
+		case EColor::Green:         Result = std::fputs("\033[42m",  stdout); break;
+		case EColor::Yellow:        Result = std::fputs("\033[43m",  stdout); break;
+		case EColor::Blue:          Result = std::fputs("\033[44m",  stdout); break;
+		case EColor::Magenta:       Result = std::fputs("\033[45m",  stdout); break;
+		case EColor::Cyan:          Result = std::fputs("\033[46m",  stdout); break;
+		case EColor::White:         Result = std::fputs("\033[47m",  stdout); break;
+		case EColor::BrightBlack:   Result = std::fputs("\033[100m", stdout); break;
+		case EColor::BrightRed:     Result = std::fputs("\033[101m", stdout); break;
+		case EColor::BrightGreen:   Result = std::fputs("\033[102m", stdout); break;
+		case EColor::BrightYellow:  Result = std::fputs("\033[103m", stdout); break;
+		case EColor::BrightBlue:    Result = std::fputs("\033[104m", stdout); break;
+		case EColor::BrightMagenta: Result = std::fputs("\033[105m", stdout); break;
+		case EColor::BrightCyan:    Result = std::fputs("\033[106m", stdout); break;
+		case EColor::BrightWhite:   Result = std::fputs("\033[107m", stdout); break;
+		default:                    Result = std::fputs("\033[49m",  stdout); break;
+		}
+
+		if (Result == EOF) return GetBackgroundColor();
+
+		return GBackgroundColor = InColor;
+	}
+#	endif
+
+	return GetBackgroundColor();
+}
+
+uint GetWindowWidth()
+{
+#	if PLATFORM_WINDOWS
+	{
+		const HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
+
+		if (Console == INVALID_HANDLE_VALUE) return static_cast<uint>(-1);
+
+		CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
+
+		if (!GetConsoleScreenBufferInfo(Console, &ConsoleInfo)) return static_cast<uint>(-1);
+
+		return static_cast<uint>(ConsoleInfo.srWindow.Right - ConsoleInfo.srWindow.Left + 1);
+	}
+#	elif PLATFORM_LINUX
+	{
+		winsize Size;
+
+		if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &Size) == -1) return static_cast<uint>(-1);
+
+		return static_cast<uint>(Size.ws_col);
+	}
+#	endif
+
+	return static_cast<uint>(-1);
+}
+
+uint GetWindowHeight()
+{
+#	if PLATFORM_WINDOWS
+	{
+		const HANDLE Console = GetStdHandle(STD_OUTPUT_HANDLE);
+
+		if (Console == INVALID_HANDLE_VALUE) return static_cast<uint>(-1);
+
+		CONSOLE_SCREEN_BUFFER_INFO ConsoleInfo;
+
+		if (!GetConsoleScreenBufferInfo(Console, &ConsoleInfo)) return static_cast<uint>(-1);
+
+		return static_cast<uint>(ConsoleInfo.srWindow.Bottom - ConsoleInfo.srWindow.Top + 1);
+	}
+#	elif PLATFORM_LINUX
+	{
+		winsize Size;
+
+		if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &Size) == -1) return static_cast<uint>(-1);
+
+		return static_cast<uint>(Size.ws_row);
+	}
+#	endif
+
+	return static_cast<uint>(-1);
+}
+
+bool IsInputRedirected()
+{
+#	if PLATFORM_WINDOWS
+	{
+		const HANDLE StandardInput = GetStdHandle(STD_INPUT_HANDLE);
+
+		if (StandardInput == INVALID_HANDLE_VALUE) return false;
+
+		DWORD FileType = GetFileType(StandardInput);
+
+		return FileType != FILE_TYPE_CHAR;
+	}
+#	elif PLATFORM_LINUX
+	{
+		return isatty(fileno(stdin)) == 0;
+	}
+#	endif
+
+	return false;
+}
+
+bool IsOutputRedirected()
+{
+#	if PLATFORM_WINDOWS
+	{
+		const HANDLE StandardOutput = GetStdHandle(STD_OUTPUT_HANDLE);
+
+		if (StandardOutput == INVALID_HANDLE_VALUE) return false;
+
+		DWORD FileType = GetFileType(StandardOutput);
+
+		return FileType != FILE_TYPE_CHAR;
+	}
+#	elif PLATFORM_LINUX
+	{
+		return isatty(fileno(stdout)) == 0;
+	}
+#	endif
+
+	return false;
+}
+
+bool IsErrorRedirected()
+{
+#	if PLATFORM_WINDOWS
+	{
+		const HANDLE StandardError = GetStdHandle(STD_ERROR_HANDLE);
+
+		if (StandardError == INVALID_HANDLE_VALUE) return false;
+
+		DWORD FileType = GetFileType(StandardError);
+
+		return FileType != FILE_TYPE_CHAR;
+	}
+#	elif PLATFORM_LINUX
+	{
+		return isatty(fileno(stderr)) == 0;
+	}
+#	endif
+
+	return false;
+}
+
+void Clear()
+{
+	if (IsOutputRedirected()) return;
+
+#	if PLATFORM_WINDOWS
+	{
+		std::system("cls");
+	}
+#	elif PLATFORM_LINUX
+	{
+		Ignore = std::fputs("\033[2J\033[1;1H", stdout);
+	}
+#	endif
+}
+
+char Input(bool bEcho)
+{
+	if (bEcho || IsOutputRedirected())
+	{
+		const int Result = std::getchar();
+
+		if (Result == EOF) return static_cast<char>(-1);
+
+		return static_cast<char>(Result);
+	}
+
+#	if PLATFORM_WINDOWS
+	{
+		const HANDLE Console = GetStdHandle(STD_INPUT_HANDLE);
+
+		if (Console == INVALID_HANDLE_VALUE) return static_cast<char>(-1);
+
+		DWORD ConsoleMode = 0;
+
+		GetConsoleMode(Console, &ConsoleMode);
+
+		SetConsoleMode(Console, ConsoleMode & ~ENABLE_ECHO_INPUT);
+
+		const char Result = Input();
+
+		SetConsoleMode(Console, ConsoleMode);
+
+		return Result;
+	}
+#	elif PLATFORM_LINUX
+	{ }
+#	endif
+
+	return static_cast<char>(-1);
+}
+
+FString InputLn(bool bEcho)
+{
+	if (bEcho || IsOutputRedirected())
+	{
+		FString Result;
+
+		while (true)
+		{
+			const int Char = std::getchar();
+
+			if (Char == EOF || Char == '\n') break;
+
+			Result.PushBack(static_cast<char>(Char));
+		}
+
+		return Result;
+	}
+
+#	if PLATFORM_WINDOWS
+	{
+		const HANDLE Console = GetStdHandle(STD_INPUT_HANDLE);
+
+		if (Console == INVALID_HANDLE_VALUE) return "";
+
+		DWORD ConsoleMode = 0;
+
+		GetConsoleMode(Console, &ConsoleMode);
+
+		SetConsoleMode(Console, ConsoleMode & ~ENABLE_ECHO_INPUT);
+
+		const FString Result = InputLn();
+
+		SetConsoleMode(Console, ConsoleMode);
+
+		return Result;
+	}
+#	elif PLATFORM_LINUX
+	{ }
+#	endif
+
+	return "";
+}
+
+bool Print(char Char)
+{
+	return std::putchar(Char) != EOF;
+}
+
+bool Error(char Char)
+{
+	return std::fputc(Char, stderr) != EOF;
+}
+
+NAMESPACE_MODULE_END(Utility)
+NAMESPACE_MODULE_END(Redcraft)
+NAMESPACE_REDCRAFT_END

Redcraft.Utility/Source/Private/Miscellaneous/FileSystem.cpp

@@ -0,0 +1,596 @@
+#include <Miscellaneous/FileSystem.h>
+
+#include "Numerics/Bit.h"
+#include "Numerics/Math.h"
+#include "Templates/ScopeHelper.h"
+#include "Containers/StaticArray.h"
+
+#include <cstdio>
+
+#if PLATFORM_WINDOWS
+#	undef TEXT
+#	include <windows.h>
+#	undef CreateDirectory
+#elif PLATFORM_LINUX
+#	include <unistd.h>
+#	include <dirent.h>
+#	include <sys/stat.h>
+#endif
+
+#pragma warning(push)
+#pragma warning(disable: 4996)
+
+NAMESPACE_REDCRAFT_BEGIN
+NAMESPACE_MODULE_BEGIN(Redcraft)
+NAMESPACE_MODULE_BEGIN(Utility)
+
+NAMESPACE_BEGIN(FileSystem)
+
+bool LoadFileToArray(TArray<uint8>& Result, FStringView Path)
+{
+	if (!FileSystem::Exists(Path)) return false;
+
+	FILE* File = std::fopen(*Path, "rb");
+
+	if (File == nullptr) return false;
+
+	auto FileGuard = TScopeCallback([=] { Ignore = std::fclose(File); });
+
+	if (std::fseek(File, 0, SEEK_END) != 0) return false;
+
+	const long Length = std::ftell(File);
+
+	if (!Math::IsWithin(Length, 0, TNumericLimits<long>::Max())) return false;
+
+	if (std::fseek(File, 0, SEEK_SET) != 0) return false;
+
+	Result.SetNum(Length);
+
+	if (std::fread(Result.GetData(), sizeof(uint8), Length, File) != static_cast<size_t>(Length)) return false;
+
+	FileGuard.Release();
+
+	if (std::fclose(File) != 0) return false;
+
+	return true;
+}
+
+bool SaveArrayToFile(TArrayView<const uint8> Data, FStringView Path)
+{
+	FILE* File = std::fopen(*Path, "wb");
+
+	if (File == nullptr) return false;
+
+	auto FileGuard = TScopeCallback([=] { Ignore = std::fclose(File); });
+
+	if (std::fwrite(Data.GetData(), sizeof(uint8), Data.Num(), File) != Data.Num()) return false;
+
+	FileGuard.Release();
+
+	if (std::fclose(File) != 0) return false;
+
+	return true;
+}
+
+template <CCharType T>
+bool LoadFileToString(TString<T>& Result, FStringView Path, FileSystem::EEncoding Encoding /* = FileSystem::EEncoding::Default */, bool bVerify /* = false */)
+{
+	if (!FileSystem::Exists(Path)) return false;
+
+	FILE* File = std::fopen(*Path, "rb");
+
+	if (File == nullptr) return false;
+
+	auto FileGuard = TScopeCallback([=] { Ignore = std::fclose(File); });
+
+	if (std::fseek(File, 0, SEEK_END) != 0) return false;
+
+	long Length = std::ftell(File);
+
+	if (!Math::IsWithin(Length, 0, TNumericLimits<long>::Max())) return false;
+
+	if (std::fseek(File, 0, SEEK_SET) != 0) return false;
+
+	TStaticArray<uint8, 4> Buffer = { 0xAA, 0xAA, 0xAA, 0xAA };
+
+	Ignore = std::fread(Buffer.GetData(), sizeof(uint8), Buffer.Num(), File);
+
+	// Auto-detect the encoding if it is not specified.
+	if (Encoding == FileSystem::EEncoding::Default)
+	{
+		// Check if the file is a UTF-32 encoded file.
+		if      (Buffer[0] == 0x00 && Buffer[1] == 0x00 && Buffer[2] == 0xFE && Buffer[3] == 0xFF) Encoding = FileSystem::EEncoding::UTF32BE;
+		else if (Buffer[0] == 0xFF && Buffer[1] == 0xFE && Buffer[2] == 0x00 && Buffer[3] == 0x00) Encoding = FileSystem::EEncoding::UTF32LE;
+
+		// Check if the file is a UTF-16 encoded file.
+		else if (Buffer[0] == 0xFF && Buffer[1] == 0xFE) Encoding = FileSystem::EEncoding::UTF16LE;
+		else if (Buffer[0] == 0xFE && Buffer[1] == 0xFF) Encoding = FileSystem::EEncoding::UTF16BE;
+
+		// Check if the file is a UTF-8 encoded file.
+		else if (Buffer[0] == 0xEF && Buffer[1] == 0xBB && Buffer[2] == 0xBF) Encoding = FileSystem::EEncoding::UTF8;
+
+		// Check if the file is a wide character encoded file.
+		else if (Buffer[0] == 0x00 || Buffer[1] == 0x00 || Buffer[2] == 0x00 || Buffer[3] == 0x00) Encoding = FileSystem::EEncoding::Wide;
+
+		// Check if the file is a narrow character encoded file.
+		else Encoding = FileSystem::EEncoding::Narrow;
+	}
+
+	// Jump to the BOM character if the file is a UTF-8, UTF-16 or UTF-32 encoded file.
+	switch (Encoding)
+	{
+	case FileSystem::EEncoding::Narrow:
+	case FileSystem::EEncoding::Wide:                                                                                          { Length -= 0; if (std::fseek(File, 0, SEEK_SET) != 0) return false; } break;
+	case FileSystem::EEncoding::UTF8:    if (Buffer[0] == 0xEF && Buffer[1] == 0xBB && Buffer[2] == 0xBF)                      { Length -= 3; if (std::fseek(File, 3, SEEK_SET) != 0) return false; } break;
+	case FileSystem::EEncoding::UTF16BE: if (Buffer[0] == 0xFE && Buffer[1] == 0xFF)                                           { Length -= 2; if (std::fseek(File, 2, SEEK_SET) != 0) return false; } break;
+	case FileSystem::EEncoding::UTF16LE: if (Buffer[0] == 0xFF && Buffer[1] == 0xFE)                                           { Length -= 2; if (std::fseek(File, 2, SEEK_SET) != 0) return false; } break;
+	case FileSystem::EEncoding::UTF32BE: if (Buffer[0] == 0x00 && Buffer[1] == 0x00 && Buffer[2] == 0xFE && Buffer[3] == 0xFF) { Length -= 4; if (std::fseek(File, 4, SEEK_SET) != 0) return false; } break;
+	case FileSystem::EEncoding::UTF32LE: if (Buffer[0] == 0xFF && Buffer[1] == 0xFE && Buffer[2] == 0x00 && Buffer[3] == 0x00) { Length -= 4; if (std::fseek(File, 4, SEEK_SET) != 0) return false; } break;
+	default: check_no_entry();
+	}
+
+	check(Math::EEndian::Native == Math::EEndian::Big || Math::EEndian::Native == Math::EEndian::Little);
+
+	const bool bByteSwap =
+		Math::EEndian::Native == Math::EEndian::Big    ? Encoding == FileSystem::EEncoding::UTF16LE || Encoding == FileSystem::EEncoding::UTF32LE :
+		Math::EEndian::Native == Math::EEndian::Little ? Encoding == FileSystem::EEncoding::UTF16BE || Encoding == FileSystem::EEncoding::UTF32BE : false;
+
+	const auto LoadImpl = [File, Length, bByteSwap]<typename U>(TString<U>& String) -> bool
+	{
+		if (Length % sizeof(U) != 0) return false;
+
+		String.Reserve(Length / sizeof(U));
+
+		while (true)
+		{
+			U Char;
+
+			const size_t ReadNum = std::fread(&Char, 1, sizeof(U), File);
+
+			if (ReadNum == 0) break;
+
+			if (ReadNum != sizeof(U)) return false;
+
+			if (bByteSwap) Char = Math::ByteSwap(static_cast<TMakeUnsigned<U>>(Char));
+
+#			if PLATFORM_WINDOWS
+			{
+				if (!String.IsEmpty() && String.Back() == LITERAL(U, '\r') && Char == LITERAL(U, '\n'))
+				{
+					String.PopBack();
+				}
+			}
+#			endif
+
+			String.PushBack(Char);
+		}
+
+		return true;
+	};
+
+	bool bCompatible = false;
+
+	if      constexpr (CSameAs<T, char>)    bCompatible |= Encoding == FileSystem::EEncoding::Narrow;
+	else if constexpr (CSameAs<T, wchar>)   bCompatible |= Encoding == FileSystem::EEncoding::Wide;
+	else if constexpr (CSameAs<T, u8char>)  bCompatible |= Encoding == FileSystem::EEncoding::UTF8;
+	else if constexpr (CSameAs<T, u16char>) bCompatible |= Encoding == FileSystem::EEncoding::UTF16BE || Encoding == FileSystem::EEncoding::UTF16LE;
+	else if constexpr (CSameAs<T, u32char>) bCompatible |= Encoding == FileSystem::EEncoding::UTF32BE || Encoding == FileSystem::EEncoding::UTF32LE;
+
+	else static_assert(sizeof(T) == -1, "Unsupported character type");
+
+	if (!bCompatible || bVerify)
+	{
+		switch (Encoding)
+		{
+		case FileSystem::EEncoding::Narrow:  { FString    Temp; if (!LoadImpl(Temp)) return false; if (!Result.DecodeFrom(Temp)) return false; break; }
+		case FileSystem::EEncoding::Wide:    { FWString   Temp; if (!LoadImpl(Temp)) return false; if (!Result.DecodeFrom(Temp)) return false; break; }
+		case FileSystem::EEncoding::UTF8:    { FU8String  Temp; if (!LoadImpl(Temp)) return false; if (!Result.DecodeFrom(Temp)) return false; break; }
+		case FileSystem::EEncoding::UTF16BE:
+		case FileSystem::EEncoding::UTF16LE: { FU16String Temp; if (!LoadImpl(Temp)) return false; if (!Result.DecodeFrom(Temp)) return false; break; }
+		case FileSystem::EEncoding::UTF32BE:
+		case FileSystem::EEncoding::UTF32LE: { FU32String Temp; if (!LoadImpl(Temp)) return false; if (!Result.DecodeFrom(Temp)) return false; break; }
+		default: check_no_entry();
+		}
+	}
+
+	else if (!LoadImpl(Result)) return false;
+
+	FileGuard.Release();
+
+	if (std::fclose(File) != 0) return false;
+
+	return true;
+}
+
+template REDCRAFTUTILITY_API bool LoadFileToString<char>   (FString&,    FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool LoadFileToString<wchar>  (FWString&,   FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool LoadFileToString<u8char> (FU8String&,  FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool LoadFileToString<u16char>(FU16String&, FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool LoadFileToString<u32char>(FU32String&, FStringView, FileSystem::EEncoding, bool);
+
+template <CCharType T>
+bool SaveStringToFile(TStringView<T> String, FStringView Path, FileSystem::EEncoding Encoding /* = FileSystem::EEncoding::Default */, bool bWithBOM /* = true */)
+{
+	bool bCompatible = Encoding == FileSystem::EEncoding::Default;
+
+	if      constexpr (CSameAs<T, char>)    bCompatible |= Encoding == FileSystem::EEncoding::Narrow;
+	else if constexpr (CSameAs<T, wchar>)   bCompatible |= Encoding == FileSystem::EEncoding::Wide;
+	else if constexpr (CSameAs<T, u8char>)  bCompatible |= Encoding == FileSystem::EEncoding::UTF8;
+	else if constexpr (CSameAs<T, u16char>) bCompatible |= Encoding == FileSystem::EEncoding::UTF16BE || Encoding == FileSystem::EEncoding::UTF16LE;
+	else if constexpr (CSameAs<T, u32char>) bCompatible |= Encoding == FileSystem::EEncoding::UTF32BE || Encoding == FileSystem::EEncoding::UTF32LE;
+
+	else static_assert(sizeof(T) == -1, "Unsupported character type");
+
+	if (bCompatible)
+	{
+		FILE* File = std::fopen(*Path, "wb");
+
+		if (File == nullptr) return false;
+
+		auto FileGuard = TScopeCallback([=] { Ignore = std::fclose(File); });
+
+		if (bWithBOM)
+		{
+			if constexpr (CSameAs<T, u8char>)
+			{
+				if (std::fwrite(U8TEXT("\uFEFF"), 1, 3, File) != 3) return false;
+			}
+
+			else if constexpr (CSameAs<T, u16char>)
+			{
+				constexpr TStaticArray<uint8, 2> BufferBE = { 0xFE, 0xFF };
+				constexpr TStaticArray<uint8, 2> BufferLE = { 0xFF, 0xFE };
+
+				if      (Encoding == FileSystem::EEncoding::UTF16BE) { if (std::fwrite(BufferBE.GetData(), 1, BufferBE.Num(), File) != BufferBE.Num()) return false; }
+				else if (Encoding == FileSystem::EEncoding::UTF16LE) { if (std::fwrite(BufferLE.GetData(), 1, BufferLE.Num(), File) != BufferLE.Num()) return false; }
+
+				else if (std::fwrite(U16TEXT("\uFEFF"), 1, sizeof(T), File) != sizeof(T)) return false;
+			}
+
+			else if constexpr (CSameAs<T, u32char>)
+			{
+				constexpr TStaticArray<uint8, 4> BufferBE = { 0x00, 0x00, 0xFE, 0xFF };
+				constexpr TStaticArray<uint8, 4> BufferLE = { 0xFF, 0xFE, 0x00, 0x00 };
+
+				if      (Encoding == FileSystem::EEncoding::UTF32BE) { if (std::fwrite(BufferBE.GetData() , 1, BufferBE.Num(), File) != BufferBE.Num()) return false; }
+				else if (Encoding == FileSystem::EEncoding::UTF32LE) { if (std::fwrite(BufferLE.GetData() , 1, BufferLE.Num(), File) != BufferLE.Num()) return false; }
+
+				else if (std::fwrite(U32TEXT("\uFEFF"), 1, sizeof(T), File) != sizeof(T)) return false;
+			}
+		}
+
+		check(Math::EEndian::Native == Math::EEndian::Big || Math::EEndian::Native == Math::EEndian::Little);
+
+		const bool bByteSwap =
+			Math::EEndian::Native == Math::EEndian::Big    ? Encoding == FileSystem::EEncoding::UTF16LE || Encoding == FileSystem::EEncoding::UTF32LE :
+			Math::EEndian::Native == Math::EEndian::Little ? Encoding == FileSystem::EEncoding::UTF16BE || Encoding == FileSystem::EEncoding::UTF32BE : false;
+
+		for (T Char : String)
+		{
+#			if PLATFORM_WINDOWS
+			{
+				if (Char == LITERAL(T, '\n'))
+				{
+					T Return = LITERAL(T, '\r');
+
+					if (bByteSwap) Return = Math::ByteSwap(static_cast<TMakeUnsigned<T>>(Return));
+
+					if (std::fwrite(&Return, 1, sizeof(T), File) != sizeof(T)) return false;
+				}
+			}
+#			endif
+
+			if (bByteSwap) Char = Math::ByteSwap(static_cast<TMakeUnsigned<T>>(Char));
+
+			if (std::fwrite(&Char, 1, sizeof(T), File) != sizeof(T)) return false;
+		}
+
+		FileGuard.Release();
+
+		if (std::fclose(File) != 0) return false;
+
+		return true;
+	}
+
+	FString PathWithNull;
+
+	PathWithNull.Reserve(Path.Num() + 1);
+
+	PathWithNull += Path;
+	PathWithNull += '\0';
+
+	switch (Encoding)
+	{
+	case FileSystem::EEncoding::Narrow:  { FString    Temp; if (!Temp.DecodeFrom(String)) return false; if (!FileSystem::SaveStringToFile(Temp, PathWithNull, FileSystem::EEncoding::Narrow,  bWithBOM)) return false; break; }
+	case FileSystem::EEncoding::Wide:    { FWString   Temp; if (!Temp.DecodeFrom(String)) return false; if (!FileSystem::SaveStringToFile(Temp, PathWithNull, FileSystem::EEncoding::Wide,    bWithBOM)) return false; break; }
+	case FileSystem::EEncoding::UTF8:    { FU8String  Temp; if (!Temp.DecodeFrom(String)) return false; if (!FileSystem::SaveStringToFile(Temp, PathWithNull, FileSystem::EEncoding::UTF8,    bWithBOM)) return false; break; }
+	case FileSystem::EEncoding::UTF16BE: { FU16String Temp; if (!Temp.DecodeFrom(String)) return false; if (!FileSystem::SaveStringToFile(Temp, PathWithNull, FileSystem::EEncoding::UTF16BE, bWithBOM)) return false; break; }
+	case FileSystem::EEncoding::UTF16LE: { FU16String Temp; if (!Temp.DecodeFrom(String)) return false; if (!FileSystem::SaveStringToFile(Temp, PathWithNull, FileSystem::EEncoding::UTF16LE, bWithBOM)) return false; break; }
+	case FileSystem::EEncoding::UTF32BE: { FU32String Temp; if (!Temp.DecodeFrom(String)) return false; if (!FileSystem::SaveStringToFile(Temp, PathWithNull, FileSystem::EEncoding::UTF32BE, bWithBOM)) return false; break; }
+	case FileSystem::EEncoding::UTF32LE: { FU32String Temp; if (!Temp.DecodeFrom(String)) return false; if (!FileSystem::SaveStringToFile(Temp, PathWithNull, FileSystem::EEncoding::UTF32LE, bWithBOM)) return false; break; }
+	default: check_no_entry(); return false;
+	}
+
+	return true;
+}
+
+template REDCRAFTUTILITY_API bool SaveStringToFile<char>   (FStringView,    FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool SaveStringToFile<wchar>  (FWStringView,   FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool SaveStringToFile<u8char> (FU8StringView,  FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool SaveStringToFile<u16char>(FU16StringView, FStringView, FileSystem::EEncoding, bool);
+template REDCRAFTUTILITY_API bool SaveStringToFile<u32char>(FU32StringView, FStringView, FileSystem::EEncoding, bool);
+
+size_t FileSize(FStringView Path)
+{
+	if (!FileSystem::Exists(Path)) return static_cast<size_t>(-1);
+
+	FILE* File = std::fopen(*Path, "rb");
+
+	if (File == nullptr) return static_cast<size_t>(-1);
+
+	auto FileGuard = TScopeCallback([=] { Ignore = std::fclose(File); });
+
+	if (std::fseek(File, 0, SEEK_END) != 0) return static_cast<size_t>(-1);
+
+	const long Length = std::ftell(File);
+
+	if (!Math::IsWithin(Length, 0, TNumericLimits<long>::Max())) return static_cast<size_t>(-1);
+
+	FileGuard.Release();
+
+	if (std::fclose(File) != 0) return static_cast<size_t>(-1);
+
+	return Length;
+}
+
+bool Delete(FStringView Path)
+{
+	return std::remove(*Path) == 0;
+}
+
+bool Exists(FStringView Path)
+{
+#	if PLATFORM_WINDOWS
+	{
+		DWORD Attributes = GetFileAttributesA(*Path);
+
+		if (Attributes == INVALID_FILE_ATTRIBUTES) return false;
+
+		return !(Attributes & FILE_ATTRIBUTE_DIRECTORY);
+	}
+#	elif PLATFORM_LINUX
+	{
+		struct stat FileInfo;
+
+		FileInfo.st_size = -1;
+
+		if (stat(*Path, &FileInfo) != 0) return false;
+
+		if (!S_ISREG(FileInfo.st_mode)) return false;
+
+		return true;
+	}
+#	endif
+
+	return false;
+}
+
+bool Copy(FStringView Destination, FStringView Source)
+{
+	if (!FileSystem::Exists(Source)) return false;
+
+	FILE* FileA = std::fopen(*Source, "rb");
+
+	if (FileA == nullptr) return false;
+
+	auto FileGuardA = TScopeCallback([=] { Ignore = std::fclose(FileA); });
+
+	FILE* FileB = std::fopen(*Destination, "wb");
+
+	if (FileB == nullptr) return false;
+
+	auto FileGuardB = TScopeCallback([=] { Ignore = std::fclose(FileB); });
+
+	size_t ReadSize;
+
+	constexpr size_t BufferSize = 4096;
+
+	TStaticArray<uint8, BufferSize> Buffer;
+
+	do
+	{
+		ReadSize = std::fread(Buffer.GetData(), 1, BufferSize, FileA);
+
+		if (std::fwrite(Buffer.GetData(), 1, ReadSize, FileB) != ReadSize) return false;
+	}
+	while (ReadSize == BufferSize);
+
+	FileGuardA.Release();
+
+	if (std::fclose(FileA) != 0) return false;
+
+	FileGuardB.Release();
+
+	if (std::fclose(FileB) != 0) return false;
+
+	return true;
+}
+
+bool Rename(FStringView Destination, FStringView Source)
+{
+	return std::rename(*Source, *Destination) == 0;
+}
+
+bool CreateDirectory(FStringView Path, bool bRecursive /* = false */)
+{
+	if (Path.Num() == 0) return false;
+
+	if (bRecursive)
+	{
+		if (Path.Back() == '/' || Path.Back() == '\\') Path = Path.First(Path.Num() - 1);
+
+		FStringView Parent = Path.First(Path.FindLastOf("/\\"));
+
+		if (!FileSystem::ExistsDirectory(Parent) && !FileSystem::CreateDirectory(Parent, true)) return false;
+	}
+
+#	if PLATFORM_WINDOWS
+	{
+		return CreateDirectoryA(*Path, nullptr) != 0;
+	}
+#	elif PLATFORM_LINUX
+	{
+		return mkdir(*Path, 0755) == 0;
+	}
+#	endif
+
+	return false;
+}
+
+bool DeleteDirectory(FStringView Path, bool bRecursive /* = false */)
+{
+	if (bRecursive)
+	{
+		FString Temp;
+
+		bool bSuccessfully = FileSystem::IterateDirectory(Path, [&](FStringView File, bool bIsDirectory) -> bool
+		{
+			Temp.Reset(false);
+
+			Temp += Path;
+			Temp += '/';
+			Temp += File;
+			Temp += '\0';
+
+			if (bIsDirectory)
+			{
+				if (!FileSystem::DeleteDirectory(Temp, true)) return false;
+			}
+
+			else
+			{
+				if (!FileSystem::Delete(Temp)) return false;
+			}
+
+			return true;
+		});
+
+		if (!bSuccessfully) return false;
+	}
+
+#	if PLATFORM_WINDOWS
+	{
+		return RemoveDirectoryA(*Path) != 0;
+	}
+#	elif PLATFORM_LINUX
+	{
+		return rmdir(*Path) == 0;
+	}
+#	endif
+
+	return false;
+}
+
+bool ExistsDirectory(FStringView Path)
+{
+#	if PLATFORM_WINDOWS
+	{
+		DWORD Attributes = GetFileAttributesA(*Path);
+
+		if (Attributes == INVALID_FILE_ATTRIBUTES) return false;
+
+		return Attributes & FILE_ATTRIBUTE_DIRECTORY;
+	}
+#	elif PLATFORM_LINUX
+	{
+		DIR* Directory = opendir(*Path);
+
+		if (Directory == nullptr) return false;
+
+		Ignore = closedir(Directory);
+
+		return true;
+	}
+#	endif
+
+	return false;
+}
+
+bool IterateDirectory(FStringView Path, TFunctionRef<bool(FStringView /* Path */, bool /* bIsDirectory */)> Visitor)
+{
+#	if PLATFORM_WINDOWS
+	{
+		FString FindPath;
+
+		FindPath.Reserve(Path.Num() + 3);
+
+		FindPath += Path;
+		FindPath += '\\';
+		FindPath += '*';
+		FindPath += '\0';
+
+		WIN32_FIND_DATA FindData;
+
+		HANDLE FindHandle = FindFirstFileA(*FindPath, &FindData);
+
+		auto FindGuard = TScopeCallback([=] { Ignore = FindClose(FindHandle); });
+
+		if (FindHandle == INVALID_HANDLE_VALUE) return false;
+
+		do
+		{
+			const FStringView FilePath = FindData.cFileName;
+
+			if (FilePath == "." || FilePath == "..") continue;
+
+			const bool bIsDirectory = (FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0;
+
+			if (!Visitor(FilePath, bIsDirectory)) return false;
+		}
+		while (FindNextFileA(FindHandle, &FindData) != 0);
+
+		FindGuard.Release();
+
+		if (!FindClose(FindHandle)) return false;
+
+		return true;
+	}
+#	elif PLATFORM_LINUX
+	{
+		DIR* Directory = opendir(*Path);
+
+		if (Directory == nullptr) return false;
+
+		auto DirectoryGuard = TScopeCallback([=] { Ignore = closedir(Directory); });
+
+		dirent* Entry;
+
+		while ((Entry = readdir(Directory)) != nullptr)
+		{
+			const FStringView FilePath = Entry->d_name;
+
+			if (FilePath == "." || FilePath == "..") continue;
+
+			const bool bIsDirectory = Entry->d_type == DT_DIR;
+
+			if (!Visitor(FilePath, bIsDirectory)) return false;
+		}
+
+		DirectoryGuard.Release();
+
+		if (closedir(Directory) != 0) return false;
+
+		return true;
+	}
+#	endif
+
+	return false;
+}
+
+NAMESPACE_END(FileSystem)
+
+NAMESPACE_MODULE_END(Utility)
+NAMESPACE_MODULE_END(Redcraft)
+NAMESPACE_REDCRAFT_END
+
+#pragma warning(pop)

Redcraft.Utility/Source/Public/Miscellaneous/BitwiseEnum.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "CoreTypes.h"
+#include "TypeTraits/TypeTraits.h"
+
+NAMESPACE_REDCRAFT_BEGIN
+NAMESPACE_MODULE_BEGIN(Redcraft)
+NAMESPACE_MODULE_BEGIN(Utility)
+
+#define ENABLE_ENUM_CLASS_BITWISE_OPERATIONS(Enum)                                                                                                                                         \
+	NODISCARD FORCEINLINE constexpr Enum  operator| (Enum  LHS, Enum RHS) { return static_cast<Enum>(static_cast<TUnderlyingType<Enum>>(LHS) | static_cast<TUnderlyingType<Enum>>(RHS)); } \
+	NODISCARD FORCEINLINE constexpr Enum  operator& (Enum  LHS, Enum RHS) { return static_cast<Enum>(static_cast<TUnderlyingType<Enum>>(LHS) & static_cast<TUnderlyingType<Enum>>(RHS)); } \
+	NODISCARD FORCEINLINE constexpr Enum  operator^ (Enum  LHS, Enum RHS) { return static_cast<Enum>(static_cast<TUnderlyingType<Enum>>(LHS) ^ static_cast<TUnderlyingType<Enum>>(RHS)); } \
+	          FORCEINLINE constexpr Enum& operator|=(Enum& LHS, Enum RHS) { LHS = LHS | RHS; return LHS; }                                                                                 \
+	          FORCEINLINE constexpr Enum& operator&=(Enum& LHS, Enum RHS) { LHS = LHS & RHS; return LHS; }                                                                                 \
+	          FORCEINLINE constexpr Enum& operator^=(Enum& LHS, Enum RHS) { LHS = LHS ^ RHS; return LHS; }                                                                                 \
+	NODISCARD FORCEINLINE constexpr bool  operator! (Enum  E            ) { return                   !static_cast<TUnderlyingType<Enum>>(E);  }                                            \
+	NODISCARD FORCEINLINE constexpr Enum  operator~ (Enum  E            ) { return static_cast<Enum>(~static_cast<TUnderlyingType<Enum>>(E)); }
+
+#define FRIEND_ENUM_CLASS_BITWISE_OPERATIONS(Enum)  \
+	friend constexpr Enum  operator| (Enum , Enum); \
+	friend constexpr Enum  operator& (Enum , Enum); \
+	friend constexpr Enum  operator^ (Enum , Enum); \
+	friend constexpr Enum& operator|=(Enum&, Enum); \
+	friend constexpr Enum& operator&=(Enum&, Enum); \
+	friend constexpr Enum& operator^=(Enum&, Enum); \
+	friend constexpr bool  operator! (Enum );       \
+	friend constexpr Enum  operator~ (Enum );
+
+NAMESPACE_MODULE_END(Utility)
+NAMESPACE_MODULE_END(Redcraft)
+NAMESPACE_REDCRAFT_END

Redcraft.Utility/Source/Public/Miscellaneous/Console.h

@@ -0,0 +1,217 @@
+#pragma once
+
+#include "CoreTypes.h"
+#include "TypeTraits/TypeTraits.h"
+#include "Templates/Utility.h"
+#include "Iterators/Utility.h"
+#include "Strings/Formatting.h"
+#include "Strings/StringView.h"
+#include "Strings/String.h"
+#include "Miscellaneous/BitwiseEnum.h"
+
+NAMESPACE_REDCRAFT_BEGIN
+NAMESPACE_MODULE_BEGIN(Redcraft)
+NAMESPACE_MODULE_BEGIN(Utility)
+
+/** An enumeration that defines the color of the console. */
+enum class EColor : uint8
+{
+	Default = 0xFF,
+
+	Black     = 0b0000,
+	Red       = 0b0001,
+	Green     = 0b0010,
+	Blue      = 0b0100,
+	Intensity = 0b1000,
+
+	Cyan    = Green | Blue,
+	Magenta = Blue  | Red,
+	Yellow  = Red   | Green,
+
+	White = Red | Green | Blue,
+
+	BrightBlack   = Intensity | Black,
+	BrightRed     = Intensity | Red,
+	BrightGreen   = Intensity | Green,
+	BrightBlue    = Intensity | Blue,
+	BrightYellow  = Intensity | Yellow,
+	BrightMagenta = Intensity | Magenta,
+	BrightCyan    = Intensity | Cyan,
+	BrightWhite   = Intensity | White
+};
+
+ENABLE_ENUM_CLASS_BITWISE_OPERATIONS(EColor)
+
+/** @return The color of the console. */
+NODISCARD REDCRAFTUTILITY_API EColor GetForegroundColor();
+NODISCARD REDCRAFTUTILITY_API EColor GetBackgroundColor();
+
+/** Set the color of the console. Returns the color that was successfully set. */
+REDCRAFTUTILITY_API EColor SetForegroundColor(EColor InColor);
+REDCRAFTUTILITY_API EColor SetBackgroundColor(EColor InColor);
+
+/** @return The size of the console window. */
+NODISCARD REDCRAFTUTILITY_API uint GetWindowWidth();
+NODISCARD REDCRAFTUTILITY_API uint GetWindowHeight();
+
+/** @return true if the standard stream is redirected. */
+NODISCARD REDCRAFTUTILITY_API bool IsInputRedirected();
+NODISCARD REDCRAFTUTILITY_API bool IsOutputRedirected();
+NODISCARD REDCRAFTUTILITY_API bool IsErrorRedirected();
+
+/** Clear the console screen. */
+REDCRAFTUTILITY_API void Clear();
+
+/** @return The input character from the standard input. */
+NODISCARD REDCRAFTUTILITY_API char Input(bool bEcho = true);
+
+/** @return The input line from the standard input. */
+NODISCARD REDCRAFTUTILITY_API FString InputLn(bool bEcho = true);
+
+/** Print the character to the standard output. */
+REDCRAFTUTILITY_API bool Print(char Char);
+
+/** Print the formatted string to the standard output. */
+template <CFormattable... Ts>
+FORCEINLINE bool Print(FStringView Fmt, Ts&&... Args)
+{
+	struct FStandardOutputIterator
+	{
+		FORCEINLINE constexpr FStandardOutputIterator& operator=(char Char)
+		{
+			bError |= !Print(Char);
+			return *this;
+		}
+
+		FORCEINLINE constexpr bool operator==(FDefaultSentinel) const { return bError; }
+
+		FORCEINLINE constexpr FStandardOutputIterator& operator*()     { return *this; }
+		FORCEINLINE constexpr FStandardOutputIterator& operator++()    { return *this; }
+		FORCEINLINE constexpr FStandardOutputIterator& operator++(int) { return *this; }
+
+		bool bError = false;
+	};
+
+	static_assert(COutputIterator<FStandardOutputIterator, char>);
+
+	FStandardOutputIterator Iter;
+
+	auto Range = Ranges::View(Iter, DefaultSentinel);
+
+	Iter = Algorithms::Format(Range, Fmt, Forward<Ts>(Args)...);
+
+	return Iter != DefaultSentinel;
+}
+
+/** Print the value to the standard output. */
+template <CFormattable T>
+FORCEINLINE bool Print(T&& Value)
+{
+	if constexpr (CSameAs<TRemoveCVRef<T>, char>)
+	{
+		return Print(static_cast<char>(Value));
+	}
+
+	else if constexpr (CConvertibleTo<T, FStringView>)
+	{
+		return Print(static_cast<FStringView>(Value));
+	}
+
+	else return Print(TEXT("{0}"), Forward<T>(Value));
+}
+
+/** Print the newline character to the standard output. */
+FORCEINLINE bool PrintLn()
+{
+	return Print(TEXT("\n"));
+}
+
+/** Print the string to the standard output and append the newline character. */
+template <CFormattable... Ts>
+FORCEINLINE bool PrintLn(FStringView Fmt, Ts&&... Args)
+{
+	return Print(Fmt, Forward<Ts>(Args)...) && Print(TEXT("\n"));
+}
+
+/** Print the value to the standard output and append the newline character. */
+template <CFormattable T>
+FORCEINLINE bool PrintLn(T&& Value)
+{
+	return Print(Forward<T>(Value)) && Print(TEXT("\n"));
+}
+
+/** Print the character to the standard error. */
+REDCRAFTUTILITY_API bool Error(char Char);
+
+/** Print the formatted string to the standard error. */
+template <CFormattable... Ts>
+FORCEINLINE bool Error(FStringView Fmt, Ts&&... Args)
+{
+	struct FStandardOutputIterator
+	{
+		FORCEINLINE constexpr FStandardOutputIterator& operator=(char Char)
+		{
+			bError |= !Error(Char);
+			return *this;
+		}
+
+		FORCEINLINE constexpr bool operator==(FDefaultSentinel) const { return bError; }
+
+		FORCEINLINE constexpr FStandardOutputIterator& operator*()     { return *this; }
+		FORCEINLINE constexpr FStandardOutputIterator& operator++()    { return *this; }
+		FORCEINLINE constexpr FStandardOutputIterator& operator++(int) { return *this; }
+
+		bool bError = false;
+	};
+
+	static_assert(COutputIterator<FStandardOutputIterator, char>);
+
+	FStandardOutputIterator Iter;
+
+	auto Range = Ranges::View(Iter, DefaultSentinel);
+
+	Iter = Algorithms::Format(Range, Fmt, Forward<Ts>(Args)...);
+
+	return Iter != DefaultSentinel;
+}
+
+/** Print the value to the standard error. */
+template <CFormattable T>
+FORCEINLINE bool Error(T&& Value)
+{
+	if constexpr (CSameAs<TRemoveCVRef<T>, char>)
+	{
+		return Error(static_cast<char>(Value));
+	}
+
+	else if constexpr (CConvertibleTo<T, FStringView>)
+	{
+		return Error(static_cast<FStringView>(Value));
+	}
+
+	else return Error(TEXT("{0}"), Forward<T>(Value));
+}
+
+/** Print the newline character to the standard error. */
+FORCEINLINE bool ErrorLn()
+{
+	return Error(TEXT("\n"));
+}
+
+/** Print the string to the standard error and append the newline character. */
+template <CFormattable... Ts>
+FORCEINLINE bool ErrorLn(FStringView Fmt, Ts&&... Args)
+{
+	return Error(Fmt, Forward<Ts>(Args)...) && Error(TEXT("\n"));
+}
+
+/** Print the value to the standard error and append the newline character. */
+template <CFormattable T>
+FORCEINLINE bool ErrorLn(T&& Value)
+{
+	return Error(Forward<T>(Value)) && Error(TEXT("\n"));
+}
+
+NAMESPACE_MODULE_END(Utility)
+NAMESPACE_MODULE_END(Redcraft)
+NAMESPACE_REDCRAFT_END

Redcraft.Utility/Source/Public/Miscellaneous/FileSystem.h

@@ -0,0 +1,116 @@
+#pragma once
+
+#include "CoreTypes.h"
+#include "TypeTraits/TypeTraits.h"
+#include "Templates/Utility.h"
+#include "Templates/Function.h"
+#include "Containers/Array.h"
+#include "Strings/StringView.h"
+#include "Strings/String.h"
+
+NAMESPACE_REDCRAFT_BEGIN
+NAMESPACE_MODULE_BEGIN(Redcraft)
+NAMESPACE_MODULE_BEGIN(Utility)
+
+NAMESPACE_BEGIN(FileSystem)
+
+/** The encoding of the text file. */
+enum class EEncoding : uint8
+{
+	Default,
+	Narrow,
+	Wide,
+	UTF8,
+	UTF16BE,
+	UTF16LE,
+	UTF32BE,
+	UTF32LE,
+};
+
+/** Loads the file at the specified path into the byte array. */
+REDCRAFTUTILITY_API bool LoadFileToArray(TArray<uint8>& Result, FStringView Path);
+
+/** Saves the byte array to the file at the specified path. */
+REDCRAFTUTILITY_API bool SaveArrayToFile(TArrayView<const uint8> Data, FStringView Path);
+
+/**
+ * Loads the file at the specified path into the string.
+ *
+ * @param Result   - The string to load the file into.
+ * @param Path     - The path to the file to load.
+ * @param Encoding - The encoding of the file. The default value indicates automatic detection.
+ * @param bVerify  - Whether to verify the character validity of the file.
+ *
+ * @return true if the file was successfully loaded, false otherwise.
+ */
+template <CCharType T>
+REDCRAFTUTILITY_API bool LoadFileToString(TString<T>& Result, FStringView Path, FileSystem::EEncoding Encoding = FileSystem::EEncoding::Default, bool bVerify = false);
+
+/**
+ * Saves the string to the file at the specified path.
+ *
+ * @param String   - The string to save to the file.
+ * @param Path     - The path to the file to save.
+ * @param Encoding - The encoding of the file. The default value indicates the same as the string.
+ * @param bWithBOM - Whether to write the BOM character at the beginning of the file. Not valid for narrow and wide encoding.
+ *
+ * @return true if the file was successfully saved, false otherwise.
+ */
+template <CCharType T>
+REDCRAFTUTILITY_API bool SaveStringToFile(TStringView<T> String, FStringView Path, FileSystem::EEncoding Encoding = FileSystem::EEncoding::Default, bool bWithBOM = true);
+
+/**
+ * Saves the string to the file at the specified path.
+ *
+ * @param String   - The string to save to the file.
+ * @param Path     - The path to the file to save.
+ * @param Encoding - The encoding of the file. The default value indicates the same as the string.
+ * @param bWithBOM - Whether to write the BOM character at the beginning of the file. Not valid for narrow and wide encoding.
+ *
+ * @return true if the file was successfully saved, false otherwise.
+ */
+template <typename T> requires (CConvertibleTo<T&&, FStringView> || CConvertibleTo<T&&, FWStringView>
+	|| CConvertibleTo<T&&, FU8StringView> || CConvertibleTo<T&&, FU16StringView> || CConvertibleTo<T&&, FU32StringView>)
+bool SaveStringToFile(T&& String, FStringView Path, FileSystem::EEncoding Encoding = FileSystem::EEncoding::Default, bool bWithBOM = true)
+{
+	if      constexpr (CConvertibleTo<T&&, FStringView>)    return SaveStringToFile(FStringView   (Forward<T>(String)), Path, Encoding, bWithBOM);
+	else if constexpr (CConvertibleTo<T&&, FWStringView>)   return SaveStringToFile(FWStringView  (Forward<T>(String)), Path, Encoding, bWithBOM);
+	else if constexpr (CConvertibleTo<T&&, FU8StringView>)  return SaveStringToFile(FU8StringView (Forward<T>(String)), Path, Encoding, bWithBOM);
+	else if constexpr (CConvertibleTo<T&&, FU16StringView>) return SaveStringToFile(FU16StringView(Forward<T>(String)), Path, Encoding, bWithBOM);
+	else if constexpr (CConvertibleTo<T&&, FU32StringView>) return SaveStringToFile(FU32StringView(Forward<T>(String)), Path, Encoding, bWithBOM);
+
+	return false;
+}
+
+/** @return The size of the file at the specified path. */
+REDCRAFTUTILITY_API size_t FileSize(FStringView Path);
+
+/** Deletes the file at the specified path. */
+REDCRAFTUTILITY_API bool Delete(FStringView Path);
+
+/** @return true if the regular file at the specified path exists, false otherwise. */
+REDCRAFTUTILITY_API bool Exists(FStringView Path);
+
+/** Copies the file from the source path to the destination path. */
+REDCRAFTUTILITY_API bool Copy(FStringView Destination, FStringView Source);
+
+/** Renames the file from the source path to the destination path. */
+REDCRAFTUTILITY_API bool Rename(FStringView Destination, FStringView Source);
+
+/** Creates the directory at the specified path. If recursive, it will not delete the created items on failure. */
+REDCRAFTUTILITY_API bool CreateDirectory(FStringView Path, bool bRecursive = false);
+
+/** Deletes the directory at the specified path. If recursive, it will not recreate the deleted items on failure. */
+REDCRAFTUTILITY_API bool DeleteDirectory(FStringView Path, bool bRecursive = false);
+
+/** @return true if the directory at the specified path exists, false otherwise. */
+REDCRAFTUTILITY_API bool ExistsDirectory(FStringView Path);
+
+/** Iterates items in the directory at the specified path. */
+REDCRAFTUTILITY_API bool IterateDirectory(FStringView Path, TFunctionRef<bool(FStringView /* Path */, bool /* bIsDirectory */)> Visitor);
+
+NAMESPACE_END(FileSystem)
+
+NAMESPACE_MODULE_END(Utility)
+NAMESPACE_MODULE_END(Redcraft)
+NAMESPACE_REDCRAFT_END

Redcraft.Utility/Source/Public/Strings/Formatting.h

@@ -15,6 +15,9 @@
 
 #include <charconv>
 
+#pragma warning(push)
+#pragma warning(disable: 4244)
+
 NAMESPACE_REDCRAFT_BEGIN
 NAMESPACE_MODULE_BEGIN(Redcraft)
 NAMESPACE_MODULE_BEGIN(Utility)
@@ -235,8 +238,6 @@ FORCEINLINE constexpr TRangeIterator<R2> Format(R2&& Output, R1&& Fmt, Ts&&... A
 	// If the output range is insufficient.
 	if (OutIter == OutSent) UNLIKELY return OutIter;
 
-	TTuple<TFormatter<TRemoveCVRef<Ts>, FCharType>...> Formatters;
-
 	// For each character in the format string.
 	for (FCharType Char; FmtIter != FmtSent; ++FmtIter)
 	{
@@ -315,35 +316,40 @@ FORCEINLINE constexpr TRangeIterator<R2> Format(R2&& Output, R1&& Fmt, Ts&&... A
 				// Jump over the ':' character.
 				if (Char == LITERAL(FCharType, ':')) ++FmtIter;
 
-				FormatStringContext.AdvanceTo(MoveTemp(FmtIter));
+				if (FmtIter == FmtSent) UNLIKELY
-
-				// Parse the format description string.
-				FmtIter = Formatters.Visit([&FormatStringContext](auto& Formatter) -> decltype(FmtIter) { return Formatter.Parse(FormatStringContext); }, Index);
-
-				if (FmtIter == FmtSent || *FmtIter != LITERAL(FCharType, '}')) UNLIKELY
 				{
 					checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
 
 					break;
 				}
 
-				FormatObjectContext.AdvanceTo(MoveTemp(OutIter));
+				Char = *FmtIter;
 
-				auto FormatHandler = [&]<size_t... Indices>(TIndexSequence<Indices...>)
+				ForwardAsTuple(Forward<Ts>(Args)...).Visit([&]<typename T>(T&& Arg)
 				{
-					TTuple<TConstant<size_t, Indices>...> Visitor;
+					TFormatter<TRemoveCVRef<T>, FCharType> Formatter;
 
-					return Visitor.Visit([&]<size_t ConstantIndex>(TConstant<size_t, ConstantIndex>)
+					if (Char != LITERAL(FCharType, '}'))
 					{
-						check(ConstantIndex == Index);
+						FormatStringContext.AdvanceTo(MoveTemp(FmtIter));
 
-						return Formatters.template GetValue<ConstantIndex>().Format(ForwardAsTuple(Forward<Ts>(Args)...).template GetValue<ConstantIndex>(), FormatObjectContext);
+						// Parse the format description string.
+						FmtIter = Formatter.Parse(FormatStringContext);
+
+						if (FmtIter == FmtSent || *FmtIter != LITERAL(FCharType, '}')) UNLIKELY
+						{
+							checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
+
+							return;
+						}
 					}
-					, Index);
-				};
 
-				// Format the object and write the result to the context.
+					FormatObjectContext.AdvanceTo(MoveTemp(OutIter));
-				OutIter = FormatHandler(TIndexSequenceFor<Ts...>());
+
+					// Format the object and write the result to the context.
+					OutIter = Formatter.Format(Forward<T>(Arg), FormatObjectContext);
+				}
+				, Index);
 			}
 
 			else
@@ -925,14 +931,21 @@ public:
 			*Iter++ = LITERAL(FCharType, '\"');
 		}
 
-		const FCharType* Ptr = Object - 1;
+		const FCharType* Ptr = Object;
+
+		bool bComplete = false;
 
 		// Write the object, include escaped quotes in the counter.
 		for (size_t Index = bEscape ? 1 : 0; Index != MaxDynamicField; ++Index)
 		{
-			FCharType Char = *++Ptr;
+			if (*Ptr == LITERAL(FCharType, '\0'))
+			{
+				bComplete = true;
 
-			if (Char == LITERAL(FCharType, '\0')) break;
+				break;
+			}
+
+			FCharType Char = *Ptr++;
 
 			if (Iter == Sent) UNLIKELY return Iter;
 
@@ -995,7 +1008,7 @@ public:
 		}
 
 		// Write the right quote, if the field width is enough.
-		if (bEscape && *Ptr == LITERAL(FCharType, '\0'))
+		if (bEscape && bComplete)
 		{
 			if (Iter == Sent) UNLIKELY return Iter;
 
@@ -3166,3 +3179,5 @@ private:
 NAMESPACE_MODULE_END(Utility)
 NAMESPACE_MODULE_END(Redcraft)
 NAMESPACE_REDCRAFT_END
+
+#pragma warning(pop)

Redcraft.Utility/Source/Public/Strings/String.h

@@ -1124,10 +1124,7 @@ public:
 	/** @return The non-modifiable standard C character string version of the string. */
 	NODISCARD FORCEINLINE auto operator*() &&
 	{
-		if (this->Back() != LITERAL(T, '\0'))
+		if (!EndsWith(LITERAL(T, '\0'))) this->PushBack(LITERAL(T, '\0'));
-		{
-			this->PushBack(LITERAL(T, '\0'));
-		}
 
 		return AsConst(*this).GetData();
 	}
@@ -1442,7 +1439,67 @@ using FU32String     = TString<u32char>;
 using FUnicodeString = TString<unicodechar>;
 
 template <CCharType T> template <typename Allocator> constexpr TStringView<T>::TStringView(const TString<FElementType, Allocator>& InString)
-	: TStringView(InString.GetData(), InString.Num()) { }
+	: TStringView(InString.GetData(), InString.Num())
+{ }
+
+/**
+ * A formatter for TString.
+ *
+ * The syntax of format specifications is:
+ *
+ *	[Fill And Align] [Width] [Precision] [Type] [!] [?]
+ *
+ * 1. The fill and align part:
+ *
+ *	[Fill Character] <Align Option>
+ *
+ *	i.   Fill Character: The character is used to fill width of the object. It is optional and cannot be '{' or '}'.
+ *	                     It should be representable as a single unicode otherwise it is undefined behavior.
+ *
+ *  ii.  Align Option: The character is used to indicate the direction of alignment.
+ *
+ *		- '<': Align the formatted argument to the left of the available space
+ *		       by inserting n fill characters after the formatted argument.
+ *		       This is default option.
+ *		- '^': Align the formatted argument to the center of the available space
+ *		       by inserting n fill characters around the formatted argument.
+ *		       If cannot absolute centering, offset to the left.
+ *		- '>': Align the formatted argument ro the right of the available space
+ *		       by inserting n fill characters before the formatted argument.
+ *
+ * 2. The width part:
+ *
+ *	- 'N':   The number is used to specify the minimum field width of the object.
+ *	         N should be an unsigned non-zero decimal number.
+ *	- '{N}': Dynamically determine the minimum field width of the object.
+ *	         N should be a valid index of the format integral argument.
+ *	         N is optional, and the default value is automatic indexing.
+ *
+ * 3. The precision part:
+ *
+ *	- '.N':   The number is used to specify the maximum field width of the object.
+ *	          N should be an unsigned non-zero decimal number.
+ *	- '.{N}': Dynamically determine the maximum field width of the object.
+ *	          N should be a valid index of the format integral argument.
+ *	          N is optional, and the default value is automatic indexing.
+ *
+ * 4. The type indicator part:
+ *
+ *	- none: Indicates the as-is formatting.
+ *	- 'S':  Indicates the as-is formatting.
+ *	- 's':  Indicates lowercase formatting.
+ *
+ * 5. The case indicators part:
+ *
+ *	- '!': Indicates capitalize the entire string.
+ *
+ * 6. The escape indicators part:
+ *
+ *	- '?': Indicates the escape formatting.
+ *
+ */
+template <CCharType T, typename Allocator>
+class TFormatter<TString<T, Allocator>, T> : public TFormatter<TStringView<T>, T> { };
 
 NAMESPACE_MODULE_END(Utility)
 NAMESPACE_MODULE_END(Redcraft)

Redcraft.Utility/Source/Public/Strings/StringView.h

@@ -13,6 +13,7 @@
 #include "Iterators/Sentinel.h"
 #include "Strings/Char.h"
 #include "Strings/Convert.h"
+#include "Strings/Formatting.h"
 #include "Miscellaneous/AssertionMacros.h"
 
 #include <cstring>
@@ -492,7 +493,7 @@ public:
 	/** @return The non-modifiable standard C character string version of the string view. */
 	NODISCARD FORCEINLINE auto operator*() const
 	{
-		if (this->Back() == LITERAL(FElementType, '\0') || Contains(LITERAL(FElementType, '\0')))
+		if (EndsWith(LITERAL(FElementType, '\0')) || Contains(LITERAL(FElementType, '\0')))
 		{
 			return NAMESPACE_PRIVATE::TCStringFromTStringView<FElementType>(this->GetData(), false);
 		}
@@ -644,6 +645,634 @@ using FUnicodeStringView = TStringView<unicodechar>;
 
 // ReSharper restore CppInconsistentNaming
 
+/**
+ * A formatter for TStringView.
+ *
+ * The syntax of format specifications is:
+ *
+ *	[Fill And Align] [Width] [Precision] [Type] [!] [?]
+ *
+ * 1. The fill and align part:
+ *
+ *	[Fill Character] <Align Option>
+ *
+ *	i.   Fill Character: The character is used to fill width of the object. It is optional and cannot be '{' or '}'.
+ *	                     It should be representable as a single unicode otherwise it is undefined behavior.
+ *
+ *  ii.  Align Option: The character is used to indicate the direction of alignment.
+ *
+ *		- '<': Align the formatted argument to the left of the available space
+ *		       by inserting n fill characters after the formatted argument.
+ *		       This is default option.
+ *		- '^': Align the formatted argument to the center of the available space
+ *		       by inserting n fill characters around the formatted argument.
+ *		       If cannot absolute centering, offset to the left.
+ *		- '>': Align the formatted argument ro the right of the available space
+ *		       by inserting n fill characters before the formatted argument.
+ *
+ * 2. The width part:
+ *
+ *	- 'N':   The number is used to specify the minimum field width of the object.
+ *	         N should be an unsigned non-zero decimal number.
+ *	- '{N}': Dynamically determine the minimum field width of the object.
+ *	         N should be a valid index of the format integral argument.
+ *	         N is optional, and the default value is automatic indexing.
+ *
+ * 3. The precision part:
+ *
+ *	- '.N':   The number is used to specify the maximum field width of the object.
+ *	          N should be an unsigned non-zero decimal number.
+ *	- '.{N}': Dynamically determine the maximum field width of the object.
+ *	          N should be a valid index of the format integral argument.
+ *	          N is optional, and the default value is automatic indexing.
+ *
+ * 4. The type indicator part:
+ *
+ *	- none: Indicates the as-is formatting.
+ *	- 'S':  Indicates the as-is formatting.
+ *	- 's':  Indicates lowercase formatting.
+ *
+ * 5. The case indicators part:
+ *
+ *	- '!': Indicates capitalize the entire string.
+ *
+ * 6. The escape indicators part:
+ *
+ *	- '?': Indicates the escape formatting.
+ *
+ */
+template <CCharType T>
+class TFormatter<TStringView<T>, T>
+{
+private:
+
+	using FCharType      = T;
+	using FCharTraits    = TChar<FCharType>;
+	using FFillCharacter = TStaticArray<FCharType, FCharTraits::MaxCodeUnitLength>;
+
+public:
+
+	template <CFormatStringContext<FCharType> CTX>
+	constexpr TRangeIterator<CTX> Parse(CTX& Context)
+	{
+		auto Iter = Ranges::Begin(Context);
+		auto Sent = Ranges::End  (Context);
+
+		// Set the default values.
+		{
+			FillUnitLength   = 1;
+			FillCharacter[0] = LITERAL(FCharType, ' ');
+			AlignOption      = LITERAL(FCharType, '<');
+
+			MinFieldWidth =  0;
+			MaxFieldWidth = -1;
+
+			bDynamicMin = false;
+			bDynamicMax = false;
+
+			bLowercase = false;
+			bUppercase = false;
+			bEscape    = false;
+		}
+
+		// If the format description string is empty.
+		if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter;
+
+		FCharType Char = *Iter; ++Iter;
+
+		// Try to parse the fill and align part.
+		// This code assumes that the format string does not contain multi-unit characters, except for fill character.
+
+		// If the fill character is multi-unit.
+		if (!FCharTraits::IsValid(Char))
+		{
+			FillUnitLength   = 1;
+			FillCharacter[0] = Char;
+
+			while (true)
+			{
+				if (Iter == Sent) UNLIKELY
+				{
+					checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
+
+					return Iter;
+				}
+
+				Char = *Iter; ++Iter;
+
+				// If the fill character ends.
+				if (FillUnitLength == FCharTraits::MaxCodeUnitLength || FCharTraits::IsValid(Char)) break;
+
+				FillCharacter[FillUnitLength++] = Char;
+			}
+
+			if (Char != LITERAL(FCharType, '<') && Char != LITERAL(FCharType, '^') && Char != LITERAL(FCharType, '>')) UNLIKELY
+			{
+				checkf(false, TEXT("Illegal format string. The fill character is not representable as a single unicode."));
+
+				return Iter;
+			}
+
+			AlignOption = Char;
+
+			if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter;
+
+			Char = *Iter; ++Iter;
+		}
+
+		// If the fill character is single-unit.
+		else do
+		{
+			if (Iter == Sent) break;
+
+			// If the fill character is specified.
+			if (*Iter == LITERAL(FCharType, '<') || *Iter == LITERAL(FCharType, '^') || *Iter == LITERAL(FCharType, '>'))
+			{
+				FillUnitLength   = 1;
+				FillCharacter[0] = Char;
+
+				Char = *Iter; ++Iter;
+			}
+
+			// If the fill character is not specified and the align option is not specified.
+			else if (Char != LITERAL(FCharType, '<') && Char != LITERAL(FCharType, '^') && Char != LITERAL(FCharType, '>')) break;
+
+			AlignOption = Char;
+
+			if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter;
+
+			Char = *Iter; ++Iter;
+		}
+		while (false);
+
+		// Try to parse the width part.
+		{
+			if (Char == LITERAL(FCharType, '{'))
+			{
+				bDynamicMin   = true;
+				MinFieldWidth = INDEX_NONE;
+
+				if (Iter == Sent) UNLIKELY
+				{
+					checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
+
+					return Iter;
+				}
+
+				Char = *Iter; ++Iter;
+			}
+
+			if ((bDynamicMin || Char != LITERAL(FCharType, '0')) && FCharTraits::IsDigit(Char))
+			{
+				MinFieldWidth = FCharTraits::ToDigit(Char);
+
+				while (true)
+				{
+					if (Iter == Sent)
+					{
+						checkf(!bDynamicMin, TEXT("Illegal format string. Missing '}' in format string."));
+
+						return Iter;
+					}
+
+					if (!bDynamicMin && *Iter == LITERAL(FCharType, '}')) return Iter;
+
+					Char = *Iter; ++Iter;
+
+					const uint Digit = FCharTraits::ToDigit(Char);
+
+					if (Digit >= 10) break;
+
+					MinFieldWidth = MinFieldWidth * 10 + Digit;
+				}
+			}
+
+			if (bDynamicMin)
+			{
+				if (Char != LITERAL(FCharType, '}')) UNLIKELY
+				{
+					checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
+
+					return Iter;
+				}
+
+				do
+				{
+					// Try to automatic indexing.
+					if (MinFieldWidth == INDEX_NONE)
+					{
+						MinFieldWidth = Context.GetNextIndex();
+
+						if (MinFieldWidth == INDEX_NONE) UNLIKELY
+						{
+							checkf(false, TEXT("Illegal index. Please check the field width."));
+						}
+						else break;
+					}
+
+					// Try to manual indexing.
+					else if (!Context.CheckIndex(MinFieldWidth)) UNLIKELY
+					{
+						checkf(false, TEXT("Illegal index. Please check the field width."));
+					}
+
+					else break;
+
+					bDynamicMin   = false;
+					MinFieldWidth = 0;
+				}
+				while (false);
+
+				if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter;
+
+				Char = *Iter; ++Iter;
+			}
+		}
+
+		// Try to parse the precision part.
+		if (Char == LITERAL(FCharType, '.'))
+		{
+			if (Iter == Sent) UNLIKELY
+			{
+				checkf(false, TEXT("Illegal format string. Missing precision in format string."));
+
+				return Iter;
+			}
+
+			Char = *Iter; ++Iter;
+
+			if (Char == LITERAL(FCharType, '{'))
+			{
+				bDynamicMax   = true;
+				MaxFieldWidth = INDEX_NONE;
+
+				if (Iter == Sent) UNLIKELY
+				{
+					checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
+
+					return Iter;
+				}
+
+				Char = *Iter; ++Iter;
+			}
+
+			if ((bDynamicMax || Char != LITERAL(FCharType, '0')) && FCharTraits::IsDigit(Char))
+			{
+				MaxFieldWidth = FCharTraits::ToDigit(Char);
+
+				while (true)
+				{
+					if (Iter == Sent)
+					{
+						checkf(!bDynamicMax, TEXT("Illegal format string. Missing '}' in format string."));
+
+						return Iter;
+					}
+
+					if (!bDynamicMax && *Iter == LITERAL(FCharType, '}')) return Iter;
+
+					Char = *Iter; ++Iter;
+
+					const uint Digit = FCharTraits::ToDigit(Char);
+
+					if (Digit >= 10) break;
+
+					MaxFieldWidth = MaxFieldWidth * 10 + Digit;
+				}
+			}
+
+			else if (!bDynamicMax)
+			{
+				checkf(false, TEXT("Illegal format string. Missing precision in format string."));
+
+				return Iter;
+			}
+
+			if (bDynamicMax)
+			{
+				if (Char != LITERAL(FCharType, '}')) UNLIKELY
+				{
+					checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
+
+					return Iter;
+				}
+
+				do
+				{
+					// Try to automatic indexing.
+					if (MaxFieldWidth == INDEX_NONE)
+					{
+						MaxFieldWidth = Context.GetNextIndex();
+
+						if (MaxFieldWidth == INDEX_NONE) UNLIKELY
+						{
+							checkf(false, TEXT("Illegal index. Please check the precision."));
+						}
+						else break;
+					}
+
+					// Try to manual indexing.
+					else if (!Context.CheckIndex(MaxFieldWidth)) UNLIKELY
+					{
+						checkf(false, TEXT("Illegal index. Please check the precision."));
+					}
+
+					else break;
+
+					bDynamicMax   = false;
+					MaxFieldWidth = -1;
+				}
+				while (false);
+
+				if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter;
+
+				Char = *Iter; ++Iter;
+			}
+		}
+
+		// Try to parse the type indicators part.
+
+		switch (Char)
+		{
+		case LITERAL(FCharType, 's'): bLowercase = true; break;
+		default: { }
+		}
+
+		switch (Char)
+		{
+		case LITERAL(FCharType, 'S'):
+		case LITERAL(FCharType, 's'): if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter; Char = *Iter; ++Iter; break;
+		default: { }
+		}
+
+		// Try to parse the case indicators part.
+		if (Char == LITERAL(FCharType, '!'))
+		{
+			bUppercase = true;
+
+			if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter;
+
+			Char = *Iter; ++Iter;
+		}
+
+		// Try to parse the escape indicators part.
+		if (Char == LITERAL(FCharType, '?'))
+		{
+			bEscape = true;
+
+			if (Iter == Sent || *Iter == LITERAL(FCharType, '}')) return Iter;
+
+			Char = *Iter; ++Iter;
+		}
+
+		checkf(false, TEXT("Illegal format string. Missing '}' in format string."));
+
+		return Iter;
+	}
+
+	template <CFormatObjectContext<FCharType> CTX>
+	constexpr TRangeIterator<CTX> Format(TStringView<FCharType> Object, CTX& Context) const
+	{
+		auto Iter = Ranges::Begin(Context);
+		auto Sent = Ranges::End  (Context);
+
+		size_t MinDynamicField = MinFieldWidth;
+		size_t MaxDynamicField = MaxFieldWidth;
+
+		// Visit the dynamic width argument.
+		if (bDynamicMin)
+		{
+			MinDynamicField = Context.Visit([]<typename U>(U&& Value) -> size_t
+			{
+				using FDecayU = TRemoveCVRef<U>;
+
+				if constexpr (CIntegral<FDecayU> && !CSameAs<FDecayU, bool>)
+				{
+					checkf(Value > 0, TEXT("Illegal format argument. The dynamic width argument must be a unsigned non-zero number."));
+
+					return Math::Max(Value, 1);
+				}
+				else
+				{
+					checkf(false, TEXT("Illegal format argument. The dynamic width argument must be an integral."));
+
+					return 0;
+				}
+			}
+			, MinFieldWidth);
+		}
+
+		// Visit the dynamic precision argument.
+		if (bDynamicMax)
+		{
+			MaxDynamicField = Context.Visit([]<typename U>(U&& Value) -> size_t
+			{
+				using FDecayU = TRemoveCVRef<U>;
+
+				if constexpr (CIntegral<FDecayU> && !CSameAs<FDecayU, bool>)
+				{
+					checkf(Value > 0, TEXT("Illegal format argument. The dynamic precision argument must be a unsigned non-zero number."));
+
+					return Math::Max(Value, 1);
+				}
+				else
+				{
+					checkf(false, TEXT("Illegal format argument. The dynamic precision argument must be an integral."));
+
+					return 0;
+				}
+			}
+			, MaxFieldWidth);
+		}
+
+		size_t LeftPadding  = 0;
+		size_t RightPadding = 0;
+
+		// Estimate the field width.
+		if (MinDynamicField != 0)
+		{
+			// If escape formatting is enabled, add quotes characters.
+			size_t FieldWidth = bEscape ? 2 : 0;
+
+			for (auto ObjectIter = Object.Begin(); ObjectIter != Object.End(); ++ObjectIter)
+			{
+				if (bEscape)
+				{
+					switch (const FCharType Char = *ObjectIter)
+					{
+					case LITERAL(FCharType, '\"'):
+					case LITERAL(FCharType, '\\'):
+					case LITERAL(FCharType, '\a'):
+					case LITERAL(FCharType, '\b'):
+					case LITERAL(FCharType, '\f'):
+					case LITERAL(FCharType, '\n'):
+					case LITERAL(FCharType, '\r'):
+					case LITERAL(FCharType, '\t'):
+					case LITERAL(FCharType, '\v'): FieldWidth += 2; break;
+					default:
+						{
+							// Use '\x00' format for other non-printable characters.
+							if (!FCharTraits::IsASCII(Char) || !FCharTraits::IsPrint(Char))
+							{
+								FieldWidth += 2 + sizeof(FCharType) * 2;
+							}
+
+							else ++FieldWidth;
+						}
+					}
+				}
+
+				else ++FieldWidth;
+			}
+
+			const size_t PaddingWidth = MinDynamicField - Math::Min(FieldWidth, MinDynamicField, MaxDynamicField);
+
+			switch (AlignOption)
+			{
+			default:
+			case LITERAL(FCharType, '<'): RightPadding = PaddingWidth; break;
+			case LITERAL(FCharType, '>'): LeftPadding  = PaddingWidth; break;
+			case LITERAL(FCharType, '^'):
+				LeftPadding  = Math::DivAndFloor(PaddingWidth, 2);
+				RightPadding = PaddingWidth - LeftPadding;
+			}
+		}
+
+		// Write the left padding.
+		for (size_t Index = 0; Index != LeftPadding; ++Index)
+		{
+			for (size_t Jndex = 0; Jndex != FillUnitLength; ++Jndex)
+			{
+				if (Iter == Sent) UNLIKELY return Iter;
+
+				*Iter++ = FillCharacter[Jndex];
+			}
+		}
+
+		// Write the left quote.
+		if (bEscape)
+		{
+			if (Iter == Sent) UNLIKELY return Iter;
+
+			*Iter++ = LITERAL(FCharType, '\"');
+		}
+
+		auto ObjectIter = Object.Begin();
+
+		bool bComplete = false;
+
+		// Write the object, include escaped quotes in the counter.
+		for (size_t Index = bEscape ? 1 : 0; Index != MaxDynamicField; ++Index)
+		{
+			if (ObjectIter == Object.End())
+			{
+				bComplete = true;
+
+				break;
+			}
+
+			FCharType Char = *ObjectIter++;
+
+			if (Iter == Sent) UNLIKELY return Iter;
+
+			// Convert the character case.
+			if (bLowercase) Char = FCharTraits::ToLower(Char);
+			if (bUppercase) Char = FCharTraits::ToUpper(Char);
+
+			if (bEscape)
+			{
+				switch (Char)
+				{
+				case LITERAL(FCharType, '\"'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, '\"'); break;
+				case LITERAL(FCharType, '\\'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, '\\'); break;
+				case LITERAL(FCharType, '\a'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, 'a');  break;
+				case LITERAL(FCharType, '\b'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, 'b');  break;
+				case LITERAL(FCharType, '\f'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, 'f');  break;
+				case LITERAL(FCharType, '\n'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, 'n');  break;
+				case LITERAL(FCharType, '\r'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, 'r');  break;
+				case LITERAL(FCharType, '\t'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, 't');  break;
+				case LITERAL(FCharType, '\v'): *Iter++ = LITERAL(FCharType, '\\'); *Iter++ = LITERAL(FCharType, 'v');  break;
+				default:
+					{
+						// Use '\x00' format for other non-printable characters.
+						if (!FCharTraits::IsASCII(Char) || !FCharTraits::IsPrint(Char))
+						{
+							*Iter++ = LITERAL(FCharType, '\\');
+							*Iter++ = LITERAL(FCharType, 'x' );
+
+							using FUnsignedT = TMakeUnsigned<FCharType>;
+
+							constexpr size_t DigitNum = sizeof(FCharType) * 2;
+
+							FUnsignedT IntValue = static_cast<FUnsignedT>(Char);
+
+							TStaticArray<FCharType, DigitNum> Buffer;
+
+							for (size_t Jndex = 0; Jndex != DigitNum; ++Jndex)
+							{
+								Buffer[DigitNum - Jndex - 1] = FCharTraits::FromDigit(IntValue & 0xF);
+
+								IntValue >>= 4;
+							}
+
+							check(IntValue == 0);
+
+							for (size_t Jndex = 0; Jndex != DigitNum; ++Jndex)
+							{
+								if (Iter == Sent) UNLIKELY return Iter;
+
+								*Iter++ = Buffer[Jndex];
+							}
+						}
+
+						else *Iter++ = Char;
+					}
+				}
+			}
+
+			else *Iter++ = Char;
+		}
+
+		// Write the right quote, if the field width is enough.
+		if (bEscape && bComplete)
+		{
+			if (Iter == Sent) UNLIKELY return Iter;
+
+			*Iter++ = LITERAL(FCharType, '\"');
+		}
+
+		// Write the right padding.
+		for (size_t Index = 0; Index != RightPadding; ++Index)
+		{
+			for (size_t Jndex = 0; Jndex != FillUnitLength; ++Jndex)
+			{
+				if (Iter == Sent) UNLIKELY return Iter;
+
+				*Iter++ = FillCharacter[Jndex];
+			}
+		}
+
+		return Iter;
+	}
+
+private:
+
+	size_t         FillUnitLength = 1;
+	FFillCharacter FillCharacter  = { LITERAL(FCharType, ' ') };
+	FCharType      AlignOption    =   LITERAL(FCharType, '<');
+
+	size_t MinFieldWidth =  0;
+	size_t MaxFieldWidth = -1;
+
+	bool bDynamicMin = false;
+	bool bDynamicMax = false;
+
+	bool bLowercase = false;
+	bool bUppercase = false;
+	bool bEscape    = false;
+
+};
+
 NAMESPACE_MODULE_END(Utility)
 NAMESPACE_MODULE_END(Redcraft)
 NAMESPACE_REDCRAFT_END