rlutil.h

#pragma once
/**
 * File: rlutil.h
 *
 * About: Description
 * This file provides some useful utilities for console mode
 * roguelike game development with C and C++. It is aimed to
 * be cross-platform (at least Windows and Linux).
 *
 * About: Copyright
 * (C) 2010 Tapio Vierros
 *
 * About: Licensing
 * See <License>
 */


/// Define: RLUTIL_USE_ANSI
/// Define this to use ANSI escape sequences also on Windows
/// (defaults to using WinAPI instead).
#if 0
#define RLUTIL_USE_ANSI
#endif

/// Define: RLUTIL_STRING_T
/// Define/typedef this to your preference to override rlutil's string type.
///
/// Defaults to std::string with C++ and char* with C.
#if 0
#define RLUTIL_STRING_T char*
#endif

#ifndef RLUTIL_INLINE
	#ifdef _MSC_VER
		#define RLUTIL_INLINE __inline
	#else
		#define RLUTIL_INLINE static __inline__
	#endif
#endif

#ifdef __cplusplus
	/// Common C++ headers
	#include <iostream>
	#include <string>
	#include <cstdio> // for getch()
	/// Namespace forward declarations
	namespace rlutil {
		RLUTIL_INLINE void locate(int x, int y);
	}
#else
	#include <stdio.h> // for getch() / printf()
	#include <string.h> // for strlen()
	RLUTIL_INLINE void locate(int x, int y); // Forward declare for C to avoid warnings
#endif // __cplusplus

#ifdef _WIN32
	#include <windows.h>  // for WinAPI and Sleep()
	#define _NO_OLDNAMES  // for MinGW compatibility
	#include <conio.h>    // for getch() and kbhit()
	#define getch _getch
	#define kbhit _kbhit
#else
	#include <termios.h> // for getch() and kbhit()
	#include <unistd.h> // for getch(), kbhit() and (u)sleep()
	#include <sys/ioctl.h> // for getkey()
	#include <sys/types.h> // for kbhit()
	#include <sys/time.h> // for kbhit()

/// Function: getch
/// Get character without waiting for Return to be pressed.
/// Windows has this in conio.h
RLUTIL_INLINE int getch(void) {
	// Here be magic.
	struct termios oldt, newt;
	int ch;
	tcgetattr(STDIN_FILENO, &oldt);
	newt = oldt;
	newt.c_lflag &= ~(ICANON | ECHO);
	tcsetattr(STDIN_FILENO, TCSANOW, &newt);
	ch = getchar();
	tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
	return ch;
}

/// Function: kbhit
/// Determines if keyboard has been hit.
/// Windows has this in conio.h
RLUTIL_INLINE int kbhit(void) {
	// Here be dragons.
	static struct termios oldt, newt;
	int cnt = 0;
	tcgetattr(STDIN_FILENO, &oldt);
	newt = oldt;
	newt.c_lflag    &= ~(ICANON | ECHO);
	newt.c_iflag     = 0; // input mode
	newt.c_oflag     = 0; // output mode
	newt.c_cc[VMIN]  = 1; // minimum time to wait
	newt.c_cc[VTIME] = 1; // minimum characters to wait for
	tcsetattr(STDIN_FILENO, TCSANOW, &newt);
	ioctl(0, FIONREAD, &cnt); // Read count
	struct timeval tv;
	tv.tv_sec  = 0;
	tv.tv_usec = 100;
	select(STDIN_FILENO+1, NULL, NULL, NULL, &tv); // A small time delay
	tcsetattr(STDIN_FILENO, TCSANOW, &oldt);
	return cnt; // Return number of characters
}
#endif // _WIN32

#ifndef gotoxy
/// Function: gotoxy
/// Same as <rlutil.locate>.
RLUTIL_INLINE void gotoxy(int x, int y) {
	#ifdef __cplusplus
	rlutil::
	#endif
	locate(x,y);
}
#endif // gotoxy

#ifdef __cplusplus
/// Namespace: rlutil
/// In C++ all functions except <getch>, <kbhit> and <gotoxy> are arranged
/// under namespace rlutil. That is because some platforms have them defined
/// outside of rlutil.
namespace rlutil {
#endif

/**
 * Defs: Internal typedefs and macros
 * RLUTIL_STRING_T - String type depending on which one of C or C++ is used
 * RLUTIL_PRINT(str) - Printing macro independent of C/C++
 */

#ifdef __cplusplus
	#ifndef RLUTIL_STRING_T
		typedef std::string RLUTIL_STRING_T;
	#endif // RLUTIL_STRING_T

	#define RLUTIL_PRINT(st) do { std::cout << st; } while(false)
#else // __cplusplus
	#ifndef RLUTIL_STRING_T
		typedef const char* RLUTIL_STRING_T;
	#endif // RLUTIL_STRING_T

	#define RLUTIL_PRINT(st) printf("%s", st)
#endif // __cplusplus

/**
 * Enums: Color codes
 *
 * BLACK - Black
 * BLUE - Blue
 * GREEN - Green
 * CYAN - Cyan
 * RED - Red
 * MAGENTA - Magenta / purple
 * BROWN - Brown / dark yellow
 * GREY - Grey / dark white
 * DARKGREY - Dark grey / light black
 * LIGHTBLUE - Light blue
 * LIGHTGREEN - Light green
 * LIGHTCYAN - Light cyan
 * LIGHTRED - Light red
 * LIGHTMAGENTA - Light magenta / light purple
 * YELLOW - Yellow (bright)
 * WHITE - White (bright)
 */
enum {
	BLACK,
	BLUE,
	GREEN,
	CYAN,
	RED,
	MAGENTA,
	BROWN,
	GREY,
	DARKGREY,
	LIGHTBLUE,
	LIGHTGREEN,
	LIGHTCYAN,
	LIGHTRED,
	LIGHTMAGENTA,
	YELLOW,
	WHITE
};

/**
 * Consts: ANSI escape strings
 *
 * ANSI_CLS                - Clears screen
 * ANSI_CONSOLE_TITLE_PRE  - Prefix for changing the window title, print the window title in between
 * ANSI_CONSOLE_TITLE_POST - Suffix for changing the window title, print the window title in between
 * ANSI_ATTRIBUTE_RESET    - Resets all attributes
 * ANSI_CURSOR_HIDE        - Hides the cursor
 * ANSI_CURSOR_SHOW        - Shows the cursor
 * ANSI_CURSOR_HOME        - Moves the cursor home (0,0)
 * ANSI_BLACK              - Black
 * ANSI_RED                - Red
 * ANSI_GREEN              - Green
 * ANSI_BROWN              - Brown / dark yellow
 * ANSI_BLUE               - Blue
 * ANSI_MAGENTA            - Magenta / purple
 * ANSI_CYAN               - Cyan
 * ANSI_GREY               - Grey / dark white
 * ANSI_DARKGREY           - Dark grey / light black
 * ANSI_LIGHTRED           - Light red
 * ANSI_LIGHTGREEN         - Light green
 * ANSI_YELLOW             - Yellow (bright)
 * ANSI_LIGHTBLUE          - Light blue
 * ANSI_LIGHTMAGENTA       - Light magenta / light purple
 * ANSI_LIGHTCYAN          - Light cyan
 * ANSI_WHITE              - White (bright)
 * ANSI_BACKGROUND_BLACK   - Black background
 * ANSI_BACKGROUND_RED     - Red background
 * ANSI_BACKGROUND_GREEN   - Green background
 * ANSI_BACKGROUND_YELLOW  - Yellow background
 * ANSI_BACKGROUND_BLUE    - Blue background
 * ANSI_BACKGROUND_MAGENTA - Magenta / purple background
 * ANSI_BACKGROUND_CYAN    - Cyan background
 * ANSI_BACKGROUND_WHITE   - White background
 */
const RLUTIL_STRING_T ANSI_CLS                = "\033[2J\033[3J";
const RLUTIL_STRING_T ANSI_CONSOLE_TITLE_PRE  = "\033]0;";
const RLUTIL_STRING_T ANSI_CONSOLE_TITLE_POST = "\007";
const RLUTIL_STRING_T ANSI_ATTRIBUTE_RESET    = "\033[0m";
const RLUTIL_STRING_T ANSI_CURSOR_HIDE        = "\033[?25l";
const RLUTIL_STRING_T ANSI_CURSOR_SHOW        = "\033[?25h";
const RLUTIL_STRING_T ANSI_CURSOR_HOME        = "\033[H";
const RLUTIL_STRING_T ANSI_BLACK              = "\033[22;30m";
const RLUTIL_STRING_T ANSI_RED                = "\033[22;31m";
const RLUTIL_STRING_T ANSI_GREEN              = "\033[22;32m";
const RLUTIL_STRING_T ANSI_BROWN              = "\033[22;33m";
const RLUTIL_STRING_T ANSI_BLUE               = "\033[22;34m";
const RLUTIL_STRING_T ANSI_MAGENTA            = "\033[22;35m";
const RLUTIL_STRING_T ANSI_CYAN               = "\033[22;36m";
const RLUTIL_STRING_T ANSI_GREY               = "\033[22;37m";
const RLUTIL_STRING_T ANSI_DARKGREY           = "\033[01;30m";
const RLUTIL_STRING_T ANSI_LIGHTRED           = "\033[01;31m";
const RLUTIL_STRING_T ANSI_LIGHTGREEN         = "\033[01;32m";
const RLUTIL_STRING_T ANSI_YELLOW             = "\033[01;33m";
const RLUTIL_STRING_T ANSI_LIGHTBLUE          = "\033[01;34m";
const RLUTIL_STRING_T ANSI_LIGHTMAGENTA       = "\033[01;35m";
const RLUTIL_STRING_T ANSI_LIGHTCYAN          = "\033[01;36m";
const RLUTIL_STRING_T ANSI_WHITE              = "\033[01;37m";
const RLUTIL_STRING_T ANSI_BACKGROUND_BLACK   = "\033[40m";
const RLUTIL_STRING_T ANSI_BACKGROUND_RED     = "\033[41m";
const RLUTIL_STRING_T ANSI_BACKGROUND_GREEN   = "\033[42m";
const RLUTIL_STRING_T ANSI_BACKGROUND_YELLOW  = "\033[43m";
const RLUTIL_STRING_T ANSI_BACKGROUND_BLUE    = "\033[44m";
const RLUTIL_STRING_T ANSI_BACKGROUND_MAGENTA = "\033[45m";
const RLUTIL_STRING_T ANSI_BACKGROUND_CYAN    = "\033[46m";
const RLUTIL_STRING_T ANSI_BACKGROUND_WHITE   = "\033[47m";
// Remaining colors not supported as background colors

/**
 * Enums: Key codes for keyhit()
 *
 * KEY_ESCAPE  - Escape
 * KEY_ENTER   - Enter
 * KEY_SPACE   - Space
 * KEY_INSERT  - Insert
 * KEY_HOME    - Home
 * KEY_END     - End
 * KEY_DELETE  - Delete
 * KEY_PGUP    - PageUp
 * KEY_PGDOWN  - PageDown
 * KEY_UP      - Up arrow
 * KEY_DOWN    - Down arrow
 * KEY_LEFT    - Left arrow
 * KEY_RIGHT   - Right arrow
 * KEY_F1      - F1
 * KEY_F2      - F2
 * KEY_F3      - F3
 * KEY_F4      - F4
 * KEY_F5      - F5
 * KEY_F6      - F6
 * KEY_F7      - F7
 * KEY_F8      - F8
 * KEY_F9      - F9
 * KEY_F10     - F10
 * KEY_F11     - F11
 * KEY_F12     - F12
 * KEY_NUMDEL  - Numpad del
 * KEY_NUMPAD0 - Numpad 0
 * KEY_NUMPAD1 - Numpad 1
 * KEY_NUMPAD2 - Numpad 2
 * KEY_NUMPAD3 - Numpad 3
 * KEY_NUMPAD4 - Numpad 4
 * KEY_NUMPAD5 - Numpad 5
 * KEY_NUMPAD6 - Numpad 6
 * KEY_NUMPAD7 - Numpad 7
 * KEY_NUMPAD8 - Numpad 8
 * KEY_NUMPAD9 - Numpad 9
 */
enum {
	KEY_ESCAPE  = 0,
	KEY_ENTER   = 1,
	KEY_SPACE   = 32,

	KEY_INSERT  = 2,
	KEY_HOME    = 3,
	KEY_PGUP    = 4,
	KEY_DELETE  = 5,
	KEY_END     = 6,
	KEY_PGDOWN  = 7,

	KEY_UP      = 14,
	KEY_DOWN    = 15,
	KEY_LEFT    = 16,
	KEY_RIGHT   = 17,

	KEY_F1      = 18,
	KEY_F2      = 19,
	KEY_F3      = 20,
	KEY_F4      = 21,
	KEY_F5      = 22,
	KEY_F6      = 23,
	KEY_F7      = 24,
	KEY_F8      = 25,
	KEY_F9      = 26,
	KEY_F10     = 27,
	KEY_F11     = 28,
	KEY_F12     = 29,

	KEY_NUMDEL  = 30,
	KEY_NUMPAD0 = 31,
	KEY_NUMPAD1 = 127,
	KEY_NUMPAD2 = 128,
	KEY_NUMPAD3 = 129,
	KEY_NUMPAD4 = 130,
	KEY_NUMPAD5 = 131,
	KEY_NUMPAD6 = 132,
	KEY_NUMPAD7 = 133,
	KEY_NUMPAD8 = 134,
	KEY_NUMPAD9 = 135
};

/// Function: getkey
/// Reads a key press (blocking) and returns a key code.
///
/// See <Key codes for keyhit()>
///
/// Note:
/// Only Arrows, Esc, Enter and Space are currently working properly.
RLUTIL_INLINE int getkey(void) {
	#ifndef _WIN32
	int cnt = kbhit(); // for ANSI escapes processing
	#endif
	int k = getch();
	switch(k) {
		case 0: {
			int kk;
			switch (kk = getch()) {
				case 71: return KEY_NUMPAD7;
				case 72: return KEY_NUMPAD8;
				case 73: return KEY_NUMPAD9;
				case 75: return KEY_NUMPAD4;
				case 77: return KEY_NUMPAD6;
				case 79: return KEY_NUMPAD1;
				case 80: return KEY_NUMPAD2;
				case 81: return KEY_NUMPAD3;
				case 82: return KEY_NUMPAD0;
				case 83: return KEY_NUMDEL;
				default: return kk-59+KEY_F1; // Function keys
			}}
		case 224: {
			int kk;
			switch (kk = getch()) {
				case 71: return KEY_HOME;
				case 72: return KEY_UP;
				case 73: return KEY_PGUP;
				case 75: return KEY_LEFT;
				case 77: return KEY_RIGHT;
				case 79: return KEY_END;
				case 80: return KEY_DOWN;
				case 81: return KEY_PGDOWN;
				case 82: return KEY_INSERT;
				case 83: return KEY_DELETE;
				default: return kk-123+KEY_F1; // Function keys
			}}
		case 13: return KEY_ENTER;
#ifdef _WIN32
		case 27: return KEY_ESCAPE;
#else // _WIN32
		case 155: // single-character CSI
		case 27: {
			// Process ANSI escape sequences
			if (cnt >= 3 && getch() == '[') {
				switch (k = getch()) {
					case 'A': return KEY_UP;
					case 'B': return KEY_DOWN;
					case 'C': return KEY_RIGHT;
					case 'D': return KEY_LEFT;
				}
			} else return KEY_ESCAPE;
		}
#endif // _WIN32
		default: return k;
	}
}

/// Function: nb_getch
/// Non-blocking getch(). Returns 0 if no key was pressed.
RLUTIL_INLINE int nb_getch(void) {
	if (kbhit()) return getch();
	else return 0;
}

/// Function: getANSIColor
/// Return ANSI color escape sequence for specified number 0-15.
///
/// See <Color Codes>
RLUTIL_INLINE RLUTIL_STRING_T getANSIColor(const int c) {
	switch (c) {
		case BLACK       : return ANSI_BLACK;
		case BLUE        : return ANSI_BLUE; // non-ANSI
		case GREEN       : return ANSI_GREEN;
		case CYAN        : return ANSI_CYAN; // non-ANSI
		case RED         : return ANSI_RED; // non-ANSI
		case MAGENTA     : return ANSI_MAGENTA;
		case BROWN       : return ANSI_BROWN;
		case GREY        : return ANSI_GREY;
		case DARKGREY    : return ANSI_DARKGREY;
		case LIGHTBLUE   : return ANSI_LIGHTBLUE; // non-ANSI
		case LIGHTGREEN  : return ANSI_LIGHTGREEN;
		case LIGHTCYAN   : return ANSI_LIGHTCYAN; // non-ANSI;
		case LIGHTRED    : return ANSI_LIGHTRED; // non-ANSI;
		case LIGHTMAGENTA: return ANSI_LIGHTMAGENTA;
		case YELLOW      : return ANSI_YELLOW; // non-ANSI
		case WHITE       : return ANSI_WHITE;
		default: return "";
	}
}

/// Function: getANSIBackgroundColor
/// Return ANSI background color escape sequence for specified number 0-15.
///
/// See <Color Codes>
RLUTIL_INLINE RLUTIL_STRING_T getANSIBackgroundColor(const int c) {
	switch (c) {
		case BLACK  : return ANSI_BACKGROUND_BLACK;
		case BLUE   : return ANSI_BACKGROUND_BLUE;
		case GREEN  : return ANSI_BACKGROUND_GREEN;
		case CYAN   : return ANSI_BACKGROUND_CYAN;
		case RED    : return ANSI_BACKGROUND_RED;
		case MAGENTA: return ANSI_BACKGROUND_MAGENTA;
		case BROWN  : return ANSI_BACKGROUND_YELLOW;
		case GREY   : return ANSI_BACKGROUND_WHITE;
		default: return "";
	}
}

/// Function: setColor
/// Change color specified by number (Windows / QBasic colors).
/// Don't change the background color
///
/// See <Color Codes>
RLUTIL_INLINE void setColor(int c) {
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
	CONSOLE_SCREEN_BUFFER_INFO csbi;

	GetConsoleScreenBufferInfo(hConsole, &csbi);

	SetConsoleTextAttribute(hConsole, (csbi.wAttributes & 0xFFF0) | (WORD)c); // Foreground colors take up the least significant byte
#else
	RLUTIL_PRINT(getANSIColor(c));
#endif
}

/// Function: setBackgroundColor
/// Change background color specified by number (Windows / QBasic colors).
/// Don't change the foreground color
///
/// See <Color Codes>
RLUTIL_INLINE void setBackgroundColor(int c) {
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
	CONSOLE_SCREEN_BUFFER_INFO csbi;

	GetConsoleScreenBufferInfo(hConsole, &csbi);

	SetConsoleTextAttribute(hConsole, (csbi.wAttributes & 0xFF0F) | (((WORD)c) << 4)); // Background colors take up the second-least significant byte
#else
	RLUTIL_PRINT(getANSIBackgroundColor(c));
#endif
}

/// Function: saveDefaultColor
/// Call once to preserve colors for use in resetColor()
/// on Windows without ANSI, no-op otherwise
///
/// See <Color Codes>
/// See <resetColor>
RLUTIL_INLINE int saveDefaultColor(void) {
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	static char initialized = 0; // bool
	static WORD attributes;

	if (!initialized) {
		CONSOLE_SCREEN_BUFFER_INFO csbi;
		GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi);
		attributes = csbi.wAttributes;
		initialized = 1;
	}
	return (int)attributes;
#else
	return -1;
#endif
}

/// Function: resetColor
/// Reset color to default
/// Requires a call to saveDefaultColor() to set the defaults
///
/// See <Color Codes>
/// See <setColor>
/// See <saveDefaultColor>
RLUTIL_INLINE void resetColor(void) {
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), (WORD)saveDefaultColor());
#else
	RLUTIL_PRINT(ANSI_ATTRIBUTE_RESET);
#endif
}

/// Function: cls
/// Clears screen, resets all attributes and moves cursor home.
RLUTIL_INLINE void cls(void) {
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	// Based on https://msdn.microsoft.com/en-us/library/windows/desktop/ms682022%28v=vs.85%29.aspx
	const HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
	const COORD coordScreen = {0, 0};
	DWORD cCharsWritten;
	CONSOLE_SCREEN_BUFFER_INFO csbi;

	GetConsoleScreenBufferInfo(hConsole, &csbi);
	const DWORD dwConSize = csbi.dwSize.X * csbi.dwSize.Y;
	FillConsoleOutputCharacter(hConsole, (TCHAR)' ', dwConSize, coordScreen, &cCharsWritten);

	GetConsoleScreenBufferInfo(hConsole, &csbi);
	FillConsoleOutputAttribute(hConsole, csbi.wAttributes, dwConSize, coordScreen, &cCharsWritten);

	SetConsoleCursorPosition(hConsole, coordScreen);
#else
	RLUTIL_PRINT(ANSI_CLS);
	RLUTIL_PRINT(ANSI_CURSOR_HOME);
#endif
}

/// Function: locate
/// Sets the cursor position to 1-based x,y.
RLUTIL_INLINE void locate(int x, int y) {
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	COORD coord;
	// TODO: clamping/assert for x/y <= 0?
	coord.X = (SHORT)(x - 1);
	coord.Y = (SHORT)(y - 1); // Windows uses 0-based coordinates
	SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), coord);
#else // _WIN32 || USE_ANSI
	#ifdef __cplusplus
		RLUTIL_PRINT("\033[" << y << ";" << x << "H");
	#else // __cplusplus
		char buf[32];
		sprintf(buf, "\033[%d;%df", y, x);
		RLUTIL_PRINT(buf);
	#endif // __cplusplus
#endif // _WIN32 || USE_ANSI
}

/// Function: setString
/// Prints the supplied string without advancing the cursor
#ifdef __cplusplus
RLUTIL_INLINE void setString(const RLUTIL_STRING_T & str_) {
	const char * const str = str_.data();
	unsigned int len = str_.size();
#else // __cplusplus
RLUTIL_INLINE void setString(RLUTIL_STRING_T str) {
	unsigned int len = strlen(str);
#endif // __cplusplus
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	HANDLE hConsoleOutput = GetStdHandle(STD_OUTPUT_HANDLE);
	DWORD numberOfCharsWritten;
	CONSOLE_SCREEN_BUFFER_INFO csbi;

	GetConsoleScreenBufferInfo(hConsoleOutput, &csbi);
	WriteConsoleOutputCharacterA(hConsoleOutput, str, len, csbi.dwCursorPosition, &numberOfCharsWritten);
#else // _WIN32 || USE_ANSI
	RLUTIL_PRINT(str);
	#ifdef __cplusplus
		RLUTIL_PRINT("\033[" << len << 'D');
	#else // __cplusplus
		char buf[3 + 20 + 1]; // 20 = max length of 64-bit unsigned int when printed as dec
		sprintf(buf, "\033[%uD", len);
		RLUTIL_PRINT(buf);
	#endif // __cplusplus
#endif // _WIN32 || USE_ANSI
}

/// Function: setChar
/// Sets the character at the cursor without advancing the cursor
RLUTIL_INLINE void setChar(char ch) {
	const char buf[] = {ch, 0};
	setString(buf);
}

/// Function: setCursorVisibility
/// Shows/hides the cursor.
RLUTIL_INLINE void setCursorVisibility(char visible) {
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	HANDLE hConsoleOutput = GetStdHandle( STD_OUTPUT_HANDLE );
	CONSOLE_CURSOR_INFO structCursorInfo;
	GetConsoleCursorInfo( hConsoleOutput, &structCursorInfo ); // Get current cursor size
	structCursorInfo.bVisible = (visible ? TRUE : FALSE);
	SetConsoleCursorInfo( hConsoleOutput, &structCursorInfo );
#else // _WIN32 || USE_ANSI
	RLUTIL_PRINT((visible ? ANSI_CURSOR_SHOW : ANSI_CURSOR_HIDE));
#endif // _WIN32 || USE_ANSI
}

/// Function: hidecursor
/// Hides the cursor.
RLUTIL_INLINE void hidecursor(void) {
	setCursorVisibility(0);
}

/// Function: showcursor
/// Shows the cursor.
RLUTIL_INLINE void showcursor(void) {
	setCursorVisibility(1);
}

/// Function: msleep
/// Waits given number of milliseconds before continuing.
RLUTIL_INLINE void msleep(unsigned int ms) {
#ifdef _WIN32
	Sleep(ms);
#else
	// usleep argument must be under 1 000 000
	if (ms > 1000) sleep(ms/1000000);
	usleep((ms % 1000000) * 1000);
#endif
}

/// Function: trows
/// Get the number of rows in the terminal window or -1 on error.
RLUTIL_INLINE int trows(void) {
#ifdef _WIN32
	CONSOLE_SCREEN_BUFFER_INFO csbi;
	if (!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
		return -1;
	else
		return csbi.srWindow.Bottom - csbi.srWindow.Top + 1; // Window height
		// return csbi.dwSize.Y; // Buffer height
#else
#ifdef TIOCGSIZE
	struct ttysize ts;
	ioctl(STDIN_FILENO, TIOCGSIZE, &ts);
	return ts.ts_lines;
#elif defined(TIOCGWINSZ)
	struct winsize ts;
	ioctl(STDIN_FILENO, TIOCGWINSZ, &ts);
	return ts.ws_row;
#else // TIOCGSIZE
	return -1;
#endif // TIOCGSIZE
#endif // _WIN32
}

/// Function: tcols
/// Get the number of columns in the terminal window or -1 on error.
RLUTIL_INLINE int tcols(void) {
#ifdef _WIN32
	CONSOLE_SCREEN_BUFFER_INFO csbi;
	if (!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &csbi))
		return -1;
	else
		return csbi.srWindow.Right - csbi.srWindow.Left + 1; // Window width
		// return csbi.dwSize.X; // Buffer width
#else
#ifdef TIOCGSIZE
	struct ttysize ts;
	ioctl(STDIN_FILENO, TIOCGSIZE, &ts);
	return ts.ts_cols;
#elif defined(TIOCGWINSZ)
	struct winsize ts;
	ioctl(STDIN_FILENO, TIOCGWINSZ, &ts);
	return ts.ws_col;
#else // TIOCGSIZE
	return -1;
#endif // TIOCGSIZE
#endif // _WIN32
}

/// Function: anykey
/// Waits until a key is pressed.
/// In C++, it either takes no arguments
/// or a template-type-argument-deduced
/// argument.
/// In C, it takes a const char* representing
/// the message to be displayed, or NULL
/// for no message.
#ifdef __cplusplus
RLUTIL_INLINE void anykey() {
	getch();
}

template <class T> void anykey(const T& msg) {
	RLUTIL_PRINT(msg);
#else
RLUTIL_INLINE void anykey(RLUTIL_STRING_T msg) {
	if (msg)
		RLUTIL_PRINT(msg);
#endif // __cplusplus
	getch();
}

RLUTIL_INLINE void setConsoleTitle(RLUTIL_STRING_T title) {
	const char * true_title =
#ifdef __cplusplus
		title.c_str();
#else // __cplusplus
		title;
#endif // __cplusplus
#if defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
	SetConsoleTitleA(true_title);
#else
	RLUTIL_PRINT(ANSI_CONSOLE_TITLE_PRE);
	RLUTIL_PRINT(true_title);
	RLUTIL_PRINT(ANSI_CONSOLE_TITLE_POST);
#endif // defined(_WIN32) && !defined(RLUTIL_USE_ANSI)
}

// Classes are here at the end so that documentation is pretty.

#ifdef __cplusplus
/// Class: CursorHider
/// RAII OOP wrapper for <rlutil.hidecursor>.
/// Hides the cursor and shows it again
/// when the object goes out of scope.
struct CursorHider {
	CursorHider() { hidecursor(); }
	~CursorHider() { showcursor(); }
};

} // namespace rlutil
#endif