Build the X-Macro Table

The boilerplate defines a color table via X-macros: ``c #define COLORS \ X(RED, 0xFF0000) \ X(GREEN, 0x00FF00) \ X(BLUE, 0x0000FF) ` Implement the two views over it (the enum and lookup are YOURS to write using COLORS): `c /* the enum must contain CLR_RED, CLR_GREEN, CLR_BLUE (via pasting), plus CLR_COUNT as the sentinel */ /* returns the enum value for name ("RED" -> CLR_RED), or -1 */ int clr_from_name(const char *name); /* returns the hex value for the enum, or -1 */ long clr_hex(int clr); ``

Difficulty: intermediate