locale/FreeBSD/islower.3

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  32 .\"     @(#)islower.3   8.1 (Berkeley) 6/4/93
  33 .\" $FreeBSD: src/lib/libc/locale/islower.3,v 1.22 2009/09/04 07:44:58 des Exp $
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  35 .Dd July 17, 2005
  36 .Dt ISLOWER 3
  37 .Os
  38 .Sh NAME
  39 .Nm islower
  40 .Nd lower-case character test
  41 .Sh LIBRARY
  42 .Lb libc
  43 .Sh SYNOPSIS
  44 .In ctype.h
  45 .Ft int
  46 .Fn islower "int c"
  47 .Sh DESCRIPTION
  48 The
  49 .Fn islower
  50 function tests for any lower-case letters.
  51 The value of the argument must be representable as an
  52 .Vt "unsigned char"
  53 or the value of
  54 .Dv EOF .
  55 .Pp
  56 In the ASCII character set, this includes the following characters
  57 (with their numeric values shown in octal):
  58 .Pp
  59 .Bl -column \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__ \&000_``0''__
  60 .It "\&141\ ``a'' \t142\ ``b'' \t143\ ``c'' \t144\ ``d'' \t145\ ``e''"
  61 .It "\&146\ ``f'' \t147\ ``g'' \t150\ ``h'' \t151\ ``i'' \t152\ ``j''"
  62 .It "\&153\ ``k'' \t154\ ``l'' \t155\ ``m'' \t156\ ``n'' \t157\ ``o''"
  63 .It "\&160\ ``p'' \t161\ ``q'' \t162\ ``r'' \t163\ ``s'' \t164\ ``t''"
  64 .It "\&165\ ``u'' \t166\ ``v'' \t167\ ``w'' \t170\ ``x'' \t171\ ``y''"
  65 .It "\&172\ ``z''"
  66 .El
  67 .Sh RETURN VALUES
  68 The
  69 .Fn islower
  70 function returns zero if the character tests false and
  71 returns non-zero if the character tests true.
  72 .Sh COMPATIBILITY
  73 The
  74 .Bx 4.4
  75 extension of accepting arguments outside of the range of the
  76 .Vt "unsigned char"
  77 type in locales with large character sets is considered obsolete
  78 and may not be supported in future releases.
  79 The
  80 .Fn iswlower
  81 function should be used instead.
  82 .Sh SEE ALSO
  83 .Xr ctype 3 ,
  84 .Xr iswlower 3 ,
  85 .Xr tolower 3 ,
  86 .Xr ascii 7
  87 .Sh STANDARDS
  88 The
  89 .Fn islower
  90 function conforms to
  91 .St -isoC .