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highlight.cpp

@@ -0,0 +1,61 @@
+/* Highlights reserved programming keywords*/
+#include <iostream>
+#include <string>
+#include <sstream>
+#include <fstream>
+
+/* Color codes */
+#define COLOR_GREEN "\e[1;32m"
+#define COLOR_RESET "\x1b[0m"
+/* *********** */
+
+bool is_keyword(std::string&);
+
+int main(int argc, char *argv[])
+{	
+	if (argc < 2) {
+		std::cout << "Usage: ./" << __FILE__ << " <file>\n";
+		exit(EXIT_FAILURE);
+	}
+	std::ifstream file(argv[1]);
+	if (!file.is_open()) {
+		std::cout << "Error opening file.\n";
+		exit(EXIT_FAILURE);
+	}
+	
+	std::string word; char c;
+	while (file.get(c)) 
+	{
+		if (isalpha(c))
+			word += c;
+		else {
+			if (is_keyword(word))
+				std::cout << COLOR_GREEN << word << COLOR_RESET;
+			else
+				std::cout << word;
+			std::cout << c;
+			word="";
+		}
+	}
+	
+	return 0;
+}
+
+bool is_keyword(std::string &word)
+{
+	static const char *keywords[] =
+	{
+	"auto","break","case","char",
+	"const","continue","default","do",
+	"double","else","enum","extern",
+	"float","for", "goto", "if",
+	"int","long","register","return",
+	"short","signed","sizeof","static",
+	"struct","switch","typedef","union",
+	"unsigned","void","volatile","while",
+	"bool"
+	};
+	for (auto &w : keywords)
+		if (w==word) return true;
+	return false;
+}