ISXDIGIT(3) NEWLIB ISXDIGIT(3)NAME
3.11 `isxdigit'--hexadecimal digit predicate
SYNOPSIS
#include <ctype.h>
int isxdigit(int C);
DESCRIPTION
`isxdigit' is a macro which classifies ASCII integer values by table
lookup. It is a predicate returning non-zero for hexadecimal digits,
and `0' for other characters. It is defined only when `isascii'(C) is
true or C is EOF.
You can use a compiled subroutine instead of the macro definition by
undefining the macro using ``#undef isxdigit''.
RETURNS
`isxdigit' returns non-zero if C is a hexadecimal digit (`0'-`9',
`a'-`f', or `A'-`F').
PORTABILITY
`isxdigit' is ANSI C.
No supporting OS subroutines are required.
SEE ALSO
isxdigit is part of the library. The full documentation for is main‐
tained as a Texinfo manual. If info and are properly installed at your
site, the command
info
will give you access to the complete manual.
NEWLIB April 2010 ISXDIGIT(3)