Man Pages

isxdigit(3p) - phpMan isxdigit(3p) - phpMan

Command: man perldoc info search(apropos)  


ISXDIGIT(3P)               POSIX Programmer's Manual              ISXDIGIT(3P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface  may  not  be
       implemented on Linux.

NAME
       isxdigit - test for a hexadecimal digit

SYNOPSIS
       #include <ctype.h>

       int isxdigit(int c);


DESCRIPTION
       The  isxdigit()  function  shall test whether c is a character of class xdigit in the program's current locale;
       see the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 7, Locale.

       The c argument is an int, the value of which the application shall ensure is a character  representable  as  an
       unsigned  char  or  equal  to  the value of the macro EOF. If the argument has any other value, the behavior is
       undefined.

RETURN VALUE
       The isxdigit() function shall return non-zero if c is a hexadecimal digit; otherwise, it shall return 0.

ERRORS
       No errors are defined.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       To ensure applications portability, especially across natural languages, only this function and those listed in
       the SEE ALSO section should be used for character classification.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       isalnum(),  isalpha(),  iscntrl(), isdigit(), isgraph(), islower(), isprint(), ispunct(), isspace(), isupper(),
       the Base Definitions volume of IEEE Std 1003.1-2001, Chapter 7, Locale, <ctype.h>

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Stan-
       dard  for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifica-
       tions Issue 6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers,  Inc  and  The
       Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Stan-
       dard, the original IEEE and The Open Group Standard is the referee  document.  The  original  Standard  can  be
       obtained online at http://www.opengroup.org/unix/online.html .



IEEE/The Open Group                  2003                         ISXDIGIT(3P)