1.\" Copyright (c) 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" %sccs.include.redist.man% 9.\" 10.\" @(#)isxdigit.3 8.1 (Berkeley) 06/04/93 11.\" 12.Dd 13.Dt ISXDIGIT 3 14.Os 15.Sh NAME 16.Nm isxdigit 17.Nd hexadecimal-digit character test 18.Sh SYNOPSIS 19.Fd #include <ctype.h> 20.Ft int 21.Fn isxdigit "int c"; 22.Sh DESCRIPTION 23The 24.Fn isxdigit 25function tests for any hexadecimal-digit character. 26In the ASCII character set, this includes the following characters: 27.sp 28.Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ 29.It \&060\ ``0'' \t061\ ``1'' \t062\ ``2'' \t063\ ``3'' \t064\ ``4'' 30.It \&065\ ``5'' \t066\ ``6'' \t067\ ``7'' \t070\ ``8'' \t071\ ``9'' 31.It \&101\ ``A'' \t102\ ``B'' \t103\ ``C'' \t104\ ``D'' \t105\ ``E'' 32.It \&106\ ``F'' \t141\ ``a'' \t142\ ``b'' \t143\ ``c'' \t144\ ``d'' 33.It \&145\ ``e'' \t146\ ``f'' 34.El 35.Sh RETURN VALUES 36The 37.Fn isxdigit 38function returns zero if the character tests false and 39returns non-zero if the character tests true. 40.Sh SEE ALSO 41.Xr ctype 3 , 42.Xr ascii 7 43.Sh STANDARDS 44The 45.Fn isxdigit 46function conforms to 47.St -ansiC . 48