locale/FreeBSD/isalnum.3

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  32 .\"     @(#)isalnum.3   8.1 (Berkeley) 6/4/93
  33 .\" $FreeBSD: src/lib/libc/locale/isalnum.3,v 1.24 2009/09/04 07:44:58 des Exp $
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  35 .Dd July 17, 2005
  36 .Dt ISALNUM 3
  37 .Os
  38 .Sh NAME
  39 .Nm isalnum
  40 .Nd alphanumeric character test
  41 .Sh LIBRARY
  42 .Lb libc
  43 .Sh SYNOPSIS
  44 .In ctype.h
  45 .Ft int
  46 .Fn isalnum "int c"
  47 .Sh DESCRIPTION
  48 The
  49 .Fn isalnum
  50 function tests for any character for which
  51 .Xr isalpha 3
  52 or
  53 .Xr isdigit 3
  54 is true.
  55 The value of the argument must be representable as an
  56 .Vt "unsigned char"
  57 or the value of
  58 .Dv EOF .
  59 .Pp
  60 In the ASCII character set, this includes the following characters
  61 (preceded by their numeric values, in octal):
  62 .Pp
  63 .Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__
  64 .It "\&060\ ``0'' \t061\ ``1'' \t062\ ``2'' \t063\ ``3'' \t064\ ``4''"
  65 .It "\&065\ ``5'' \t066\ ``6'' \t067\ ``7'' \t070\ ``8'' \t071\ ``9''"
  66 .It "\&101\ ``A'' \t102\ ``B'' \t103\ ``C'' \t104\ ``D'' \t105\ ``E''"
  67 .It "\&106\ ``F'' \t107\ ``G'' \t110\ ``H'' \t111\ ``I'' \t112\ ``J''"
  68 .It "\&113\ ``K'' \t114\ ``L'' \t115\ ``M'' \t116\ ``N'' \t117\ ``O''"
  69 .It "\&120\ ``P'' \t121\ ``Q'' \t122\ ``R'' \t123\ ``S'' \t124\ ``T''"
  70 .It "\&125\ ``U'' \t126\ ``V'' \t127\ ``W'' \t130\ ``X'' \t131\ ``Y''"
  71 .It "\&132\ ``Z'' \t141\ ``a'' \t142\ ``b'' \t143\ ``c'' \t144\ ``d''"
  72 .It "\&145\ ``e'' \t146\ ``f'' \t147\ ``g'' \t150\ ``h'' \t151\ ``i''"
  73 .It "\&152\ ``j'' \t153\ ``k'' \t154\ ``l'' \t155\ ``m'' \t156\ ``n''"
  74 .It "\&157\ ``o'' \t160\ ``p'' \t161\ ``q'' \t162\ ``r'' \t163\ ``s''"
  75 .It "\&164\ ``t'' \t165\ ``u'' \t166\ ``v'' \t167\ ``w'' \t170\ ``x''"
  76 .It "\&171\ ``y'' \t172\ ``z''"
  77 .El
  78 .Sh RETURN VALUES
  79 The
  80 .Fn isalnum
  81 function returns zero if the character tests false and
  82 returns non-zero if the character tests true.
  83 .Sh COMPATIBILITY
  84 The
  85 .Bx 4.4
  86 extension of accepting arguments outside of the range of the
  87 .Vt "unsigned char"
  88 type in locales with large character sets is considered obsolete
  89 and may not be supported in future releases.
  90 The
  91 .Fn iswalnum
  92 function should be used instead.
  93 .Sh SEE ALSO
  94 .Xr ctype 3 ,
  95 .Xr isalnum_l 3 ,
  96 .Xr isalpha 3 ,
  97 .Xr isdigit 3 ,
  98 .Xr iswalnum 3 ,
  99 .Xr ascii 7
 100 .Sh STANDARDS
 101 The
 102 .Fn isalnum
 103 function conforms to
 104 .St -isoC .