Adding console text color/attribute support (ansi)

CMakeLists.txt

@@ -16,6 +16,7 @@ include(GNUInstallDirs)
 set (PROGRAM_EXE ${CMAKE_PROJECT_NAME})
 
 set (PROGRAM_SOURCE
+	src/console_ansi.cpp
 	src/string.cpp
 	src/ec.cpp
 	src/base58.cpp

src/console.h

@@ -0,0 +1,83 @@
+/**
+ * MIT License
+ *
+ * Copyright (c) 2019-2020 EOS Sw/eden
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef CONSOLE_H
+#define CONSOLE_H
+
+#include <ostream>
+
+namespace console {
+
+	// enum for all supported colors.
+	enum Color {
+		default_fg,
+		black,
+		white,
+		red,
+		green,
+		blue,
+		yellow,
+		magenta,
+		cyan,
+
+		// Light colors.
+		light_grey,
+		light_red,
+		light_green,
+		light_blue,
+		light_yellow,
+		light_magenta,
+		light_cyan,
+
+		// Dark colors
+		dark_grey
+	};
+
+	enum Attribute {
+		normal,
+		bold,
+		italic
+	};
+
+	// Resets all colors/attributes
+	std::ostream& reset(std::ostream& os);
+
+	// Foreground color
+	// Defined as a class with overloaded "<<" operator so you can write:
+	//   std::cout << fg(red) << "Text";
+	class fg
+	{
+	public:
+		fg(Color color, Attribute attribute = normal)
+			: _color(color), _attr(attribute) {}
+
+		friend std::ostream& operator<<(std::ostream& os, const fg& obj);
+
+	protected :
+		Color _color;
+		Attribute _attr;
+	};
+
+} // namespace console
+
+#endif /* CONSOLE_H */

src/console_ansi.cpp

@@ -0,0 +1,49 @@
+
+#include <iostream>
+#include "console.h"
+
+namespace console {
+
+std::ostream& reset(std::ostream& os) {
+	return os << "\033[0m";
+}
+
+// Foreground
+std::ostream& operator<<(std::ostream& os, const fg& obj) {
+
+	int attr;
+	int code;
+
+	switch(obj._color) {
+		case black : code = 30; break;
+		case red : code = 31; break;
+		case green : code = 32; break;
+		case yellow : code = 33; break;
+		case blue : code = 34; break;
+		case magenta : code = 35; break;
+		case cyan : code = 36; break;
+		case light_grey : code = 37; break;
+		case dark_grey : code = 90; break;
+		case light_red : code = 91; break;
+		case light_green : code = 92; break;
+		case light_yellow : code = 93; break;
+		case light_blue : code = 94; break;
+		case light_magenta : code = 95; break;
+		case light_cyan : code = 96; break;
+		case white : code = 97; break;
+		case default_fg : default :
+			code = 39;
+	}
+
+	switch(obj._attr) {
+
+		case bold : attr = 1; break;
+		case italic : attr = 2; break;
+		case normal : default :
+			attr = 0;
+	}
+
+	return os << "\033[" << attr << ";" << code << "m";
+}
+
+} // namespace console