ISXDIGIT(3) MachTen Programmer’s Manual ISXDIGIT(3)

NAME
isxdigit - hexadecimal-digit character test

SYNOPSIS
#include <ctype.h>

int
isxdigit(int c);

DESCRIPTION
The isxdigit() function tests for any hexadecimal-digit character. In
the ASCII character set, this includes the following characters:

060 ‘‘0’’ 061 ‘‘1’’ 062 ‘‘2’’ 063 ‘‘3’’ 064 ‘‘4’’
065 ‘‘5’’ 066 ‘‘6’’ 067 ‘‘7’’ 070 ‘‘8’’ 071 ‘‘9’’
101 ‘‘A’’ 102 ‘‘B’’ 103 ‘‘C’’ 104 ‘‘D’’ 105 ‘‘E’’
106 ‘‘F’’ 141 ‘‘a’’ 142 ‘‘b’’ 143 ‘‘c’’ 144 ‘‘d’’
145 ‘‘e’’ 146 ‘‘f’’

RETURN VALUES
The isxdigit() function returns zero if the character tests false and re-
turns non-zero if the character tests true.

SEE ALSO
ctype(3), ascii(7)

STANDARDS
The isxdigit() function conforms to ANSI C3.159-1989 (‘‘ANSI C’’).

4.4BSD June 4, 1993 1