kprintf() ANSI Color Support about xyris

[Kfeavel]

Related to #31

[Kfeavel]

In order to implement escape codes (such as \033[31m for red), we'll need to add code in the initial printf state that checks for a \ and then looks at the next few characters. From there, we can add another switch statement for the code type (i.e. \033 (esc)), and then for the data afterwards. Once the color code has been determined (i.e. [31m (red)).

printf.cpp
Line: 105-121
/* begin scanning format specifier list */
    for (; *fmt; fmt++) {
        switch (state) {
            /* STATE 0: AWAITING % */
        case 0:
            if (*fmt != '%') /* not %... */
            {
                fn(*fmt, &ptr); /* ...just echo it */
                count++;
                break;
            }
            /* found %, get next char and advance state to check if next char is a flag */
            state++;
            fmt++;
            /* FALL THROUGH */
            /* STATE 1: AWAITING FLAGS (%-0) */
        case 1:

[Kfeavel]

https://stackoverflow.com/questions/4842424/list-of-ansi-color-escape-sequences