Highlight/highlight.cpp

62 lines
1.2 KiB
C++

/* 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;
}