locale/FreeBSD/isspace.3

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  32 .\"     @(#)isspace.3   8.1 (Berkeley) 6/4/93
  33 .\" $FreeBSD: src/lib/libc/locale/isspace.3,v 1.22 2009/09/04 07:44:58 des Exp $
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  35 .Dd July 17, 2005
  36 .Dt ISSPACE 3
  37 .Os
  38 .Sh NAME
  39 .Nm isspace
  40 .Nd white-space character test
  41 .Sh LIBRARY
  42 .Lb libc
  43 .Sh SYNOPSIS
  44 .In ctype.h
  45 .Ft int
  46 .Fn isspace "int c"
  47 .Sh DESCRIPTION
  48 The
  49 .Fn isspace
  50 function tests for the white-space characters.
  51 For any locale, this includes the following standard characters:
  52 .Pp
  53 .Bl -column \&`\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___ \&``\et''___
  54 .It "\&``\et''\t``\en''\t``\ev''\t``\ef''\t``\er''\t`` ''"
  55 .El
  56 .Pp
  57 In the "C" locale,
  58 .Fn isspace
  59 successful test is limited to these characters only.
  60 The value of the argument must be representable as an
  61 .Vt "unsigned char"
  62 or the value of
  63 .Dv EOF .
  64 .Sh RETURN VALUES
  65 The
  66 .Fn isspace
  67 function returns zero if the character tests false and
  68 returns non-zero if the character tests true.
  69 .Sh COMPATIBILITY
  70 The
  71 .Bx 4.4
  72 extension of accepting arguments outside of the range of the
  73 .Vt "unsigned char"
  74 type in locales with large character sets is considered obsolete
  75 and may not be supported in future releases.
  76 The
  77 .Fn iswspace
  78 function should be used instead.
  79 .Sh SEE ALSO
  80 .Xr ctype 3 ,
  81 .Xr isalnum_l 3 ,
  82 .Xr iswspace 3 ,
  83 .Xr multibyte 3 ,
  84 .Xr ascii 7
  85 .Sh STANDARDS
  86 The
  87 .Fn isspace
  88 function conforms to
  89 .St -isoC .