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isalnum.0
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1992-08-10
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ISALNUM(3) UNIX Programmer's Manual ISALNUM(3)
NNAAMMEE
iissaallnnuumm - alphanumeric character test
SSYYNNOOPPSSIISS
##iinncclluuddee <<ccttyyppee..hh>>
_i_n_t
iissaallnnuumm(_i_n_t _c)
DDEESSCCRRIIPPTTIIOONN
The iissaallnnuumm() macro tests for any character for which isalpha(3) or is
digit(3) is true.
RREETTUURRNN VVAALLUUEESS
The iissaallnnuumm() macro returns zero if the character tests false and returns
nonzero if the character tests true.
SSEEEE AALLSSOO
isascii(3), isalnum(3), isalpha(3), iscntrl(3), isdigit(3),
isgraph(3), islower(3), isprint(3), ispunct(3), isspace(3),
isupper(3), isxdigit(3), toascii(3), tolower(3), toupper(3),
stdio(3) ascii(7)
SSTTAANNDDAARRDDSS
The iissaallnnuumm() function conforms to ANSI C3.1591989 (``ANSI C'').
BSD Experimental June 29, 1991 1