.title isxdigit Return non-zero if hexadecimal digit .ident /000003/ ; ;+ ; ; Index Test for hexadecimal digit ; ; Usage ; ; isxdigit(c); ; int c; ; ; Description ; ; Return non-zero if C is a valid hexadecimal digit (0-9, A-F, a-f). ; ; Bugs ; ; This routine is not present in other C libraries. ;- ; ; Edit history ; 000001 10-Mar-82 MM Use ctype ; 000002 06-Jun-82 MM Don't mask parity ; 000003 07-Jun-82 MM Redone ; ; The following definitions must match ctype.mac and ctype.h ; U = 0001 ; UPPER case alpha L = 0002 ; lower case alpha D = 0004 ; digit S = 0010 ; whitespace (tab, backspace, lf, etc) P = 0020 ; punctuation C = 0040 ; control X = 0100 ; hex alpha B = 0200 ; blank .psect c$code isxdigit:: mov #X,r0 ; Get the flags ;03 jmp $$ctype ; Do it ;03 .end