locale/isalnum.3

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  36 .\"     @(#)isalnum.3   8.1 (Berkeley) 6/4/93
  37 .\" $FreeBSD: src/lib/libc/locale/isalnum.3,v 1.7.2.7 2001/12/14 18:33:54 ru Exp $
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  39 .Dd June 4, 1993
  40 .Dt ISALNUM 3
  41 .Os
  42 .Sh NAME
  43 .Nm isalnum
  44 .Nd alphanumeric character test
  45 .Sh LIBRARY
  46 .Lb libc
  47 .Sh SYNOPSIS
  48 .In ctype.h
  49 .Ft int
  50 .Fn isalnum "int c"
  51 .Sh DESCRIPTION
  52 The
  53 .Fn isalnum
  54 function tests for any character for which
  55 .Xr isalpha 3
  56 or
  57 .Xr isdigit 3
  58 is true.
  59 For single C
  60 .Va char Ns s
  61 locales (see
  62 .Xr multibyte 3 )
  63 the value of the argument is
  64 representable as an
  65 .Li unsigned char
  66 or the value of
  67 .Dv EOF .
  68 In the ASCII character set, this includes the following characters
  69 (with their numeric values shown in octal):
  70 .Pp
  71 .Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__
  72 .It "\&060\ ``0'' \t061\ ``1'' \t062\ ``2'' \t063\ ``3'' \t064\ ``4''"
  73 .It "\&065\ ``5'' \t066\ ``6'' \t067\ ``7'' \t070\ ``8'' \t071\ ``9''"
  74 .It "\&101\ ``A'' \t102\ ``B'' \t103\ ``C'' \t104\ ``D'' \t105\ ``E''"
  75 .It "\&106\ ``F'' \t107\ ``G'' \t110\ ``H'' \t111\ ``I'' \t112\ ``J''"
  76 .It "\&113\ ``K'' \t114\ ``L'' \t115\ ``M'' \t116\ ``N'' \t117\ ``O''"
  77 .It "\&120\ ``P'' \t121\ ``Q'' \t122\ ``R'' \t123\ ``S'' \t124\ ``T''"
  78 .It "\&125\ ``U'' \t126\ ``V'' \t127\ ``W'' \t130\ ``X'' \t131\ ``Y''"
  79 .It "\&132\ ``Z'' \t141\ ``a'' \t142\ ``b'' \t143\ ``c'' \t144\ ``d''"
  80 .It "\&145\ ``e'' \t146\ ``f'' \t147\ ``g'' \t150\ ``h'' \t151\ ``i''"
  81 .It "\&152\ ``j'' \t153\ ``k'' \t154\ ``l'' \t155\ ``m'' \t156\ ``n''"
  82 .It "\&157\ ``o'' \t160\ ``p'' \t161\ ``q'' \t162\ ``r'' \t163\ ``s''"
  83 .It "\&164\ ``t'' \t165\ ``u'' \t166\ ``v'' \t167\ ``w'' \t170\ ``x''"
  84 .It "\&171\ ``y'' \t172\ ``z''"
  85 .El
  86 .Sh RETURN VALUES
  87 The
  88 .Fn isalnum
  89 function returns zero if the character tests false and
  90 returns non-zero if the character tests true.
  91 .Sh SEE ALSO
  92 .Xr ctype 3 ,
  93 .Xr isalpha 3 ,
  94 .Xr isdigit 3 ,
  95 .Xr multibyte 3 ,
  96 .Xr ascii 7
  97 .Sh STANDARDS
  98 The
  99 .Fn isalnum
 100 function conforms to
 101 .St -isoC .