CLIP8P            139 contrib/gregbook/rpng2-win.c #define CLIP8P(c)        MAX(0,(MIN((c),255)))   /* 8-bit pos. integer (uch) */
CLIP8P            144 contrib/gregbook/rpng2-x.c #define CLIP8P(c)        MAX(0,(MIN((c),255)))   /* 8-bit pos. integer (uch) */