#include <stdio.h>
#include <stdbool.h>
#include <termios.h>

#define ANSI_COLOR_RED "\x1b[31m"
#define ANSI_COLOR_RESET "\x1b[0m"

static struct termios term;

static bool set_terminal_in_VT_mode(void)
{
    if (tcgetattr(0, &term) != 0) return false;
    struct termios raw = term;
    raw.c_lflag &= ~ICANON; // disable buffered I/O
    raw.c_lflag &= ~ECHO; // disable echo mode
    return tcsetattr(0, TCSANOW, &raw) == 0;
}

static bool restore_terminal_mode(void)
{
    return tcsetattr(0, TCSANOW, &term) == 0;
}

int main()
{
    if (!set_terminal_in_VT_mode())
    {
        perror(NULL);
        return -1;
    }
    
    puts("Type charakters (de ASCII code van elk karakter wordt voor het karakter in het rood geprint) (0 om te stoppen):");

    char c;
    do
    {
        c = getchar();
        printf(ANSI_COLOR_RED "0x%02x" ANSI_COLOR_RESET, c);
        putchar(c);
    } while (c != '0');

    if (!restore_terminal_mode())
    {
        perror(NULL);
        return -1;
    }

    return 0;
}