usr/share/man/cat3/isalnum.0

ISALNUM(3)                  BSD Programmer's Manual                 ISALNUM(3)

N\bNA\bAM\bME\bE
     i\bis\bsa\bal\bln\bnu\bum\bm - alphanumeric character test

S\bSY\bYN\bNO\bOP\bPS\bSI\bIS\bS
     #\b#i\bin\bnc\bcl\blu\bud\bde\be <\b<c\bct\bty\byp\bpe\be.\b.h\bh>\b>

     _\bi_\bn_\bt
     i\bis\bsa\bal\bln\bnu\bum\bm(_\bi_\bn_\bt _\bc);

D\bDE\bES\bSC\bCR\bRI\bIP\bPT\bTI\bIO\bON\bN
     The i\bis\bsa\bal\bln\bnu\bum\bm() function tests for any character for which isalpha(3) or
     isdigit(3) is true.  In the ASCII character set, this includes the fol-
     lowing 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''     107 ``G''     110 ``H''     111 ``I''     112 ``J''
     113 ``K''     114 ``L''     115 ``M''     116 ``N''     117 ``O''
     120 ``P''     121 ``Q''     122 ``R''     123 ``S''     124 ``T''
     125 ``U''     126 ``V''     127 ``W''     130 ``X''     131 ``Y''
     132 ``Z''     141 ``a''     142 ``b''     143 ``c''     144 ``d''
     145 ``e''     146 ``f''     147 ``g''     150 ``h''     151 ``i''
     152 ``j''     153 ``k''     154 ``l''     155 ``m''     156 ``n''
     157 ``o''     160 ``p''     161 ``q''     162 ``r''     163 ``s''
     164 ``t''     165 ``u''     166 ``v''     167 ``w''     170 ``x''
     171 ``y''     172 ``z''

R\bRE\bET\bTU\bUR\bRN\bN V\bVA\bAL\bLU\bUE\bES\bS
     The i\bis\bsa\bal\bln\bnu\bum\bm() function returns zero if the character tests false and re-
     turns non-zero if the character tests true.

S\bSE\bEE\bE A\bAL\bLS\bSO\bO
     ctype(3),  ascii(7)

S\bST\bTA\bAN\bND\bDA\bAR\bRD\bDS\bS
     The i\bis\bsa\bal\bln\bnu\bum\bm() function conforms to ANSI C X3.159-1989 (``ANSI C '').

4.4BSD                           June 4, 1993                                1