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Annotation of src/lib/libc/gen/isspace.3, Revision 1.14

1.14    ! apb         1: .\"    $NetBSD: isspace.3,v 1.13 2007/01/18 08:35:07 rillig Exp $
1.4       cgd         2: .\"
1.1       cgd         3: .\" Copyright (c) 1991 The Regents of the University of California.
                      4: .\" All rights reserved.
                      5: .\"
                      6: .\" This code is derived from software contributed to Berkeley by
                      7: .\" the American National Standards Committee X3, on Information
                      8: .\" Processing Systems.
                      9: .\"
                     10: .\" Redistribution and use in source and binary forms, with or without
                     11: .\" modification, are permitted provided that the following conditions
                     12: .\" are met:
                     13: .\" 1. Redistributions of source code must retain the above copyright
                     14: .\"    notice, this list of conditions and the following disclaimer.
                     15: .\" 2. Redistributions in binary form must reproduce the above copyright
                     16: .\"    notice, this list of conditions and the following disclaimer in the
                     17: .\"    documentation and/or other materials provided with the distribution.
1.11      agc        18: .\" 3. Neither the name of the University nor the names of its contributors
1.1       cgd        19: .\"    may be used to endorse or promote products derived from this software
                     20: .\"    without specific prior written permission.
                     21: .\"
                     22: .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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                     24: .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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                     27: .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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                     31: .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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1.4       cgd        34: .\"     @(#)isspace.3  5.3 (Berkeley) 7/31/91
1.1       cgd        35: .\"
1.14    ! apb        36: .Dd April 17, 2008
1.1       cgd        37: .Dt ISSPACE 3
                     38: .Os
                     39: .Sh NAME
                     40: .Nm isspace
                     41: .Nd white-space character test
1.5       perry      42: .Sh LIBRARY
                     43: .Lb libc
1.1       cgd        44: .Sh SYNOPSIS
1.10      wiz        45: .In ctype.h
1.1       cgd        46: .Ft int
                     47: .Fn isspace "int c"
                     48: .Sh DESCRIPTION
                     49: The
                     50: .Fn isspace
                     51: function tests for the standard white-space characters
                     52: .\" or for any
                     53: .\" of an implementation-defined set of characters
                     54: for which
                     55: .Xr isalnum 3
                     56: is false.
                     57: The standard white-space characters are the following:
                     58: .Pp
                     59: .Bl -tag -width xxxxx -offset indent -compact
                     60: .It Sq \0
                     61: Space character.
                     62: .It Li \ef
                     63: Form feed.
                     64: .It Li \en
                     65: New-line.
                     66: .It Li \er
                     67: Carriage return.
                     68: .It Li \et
                     69: Horizontal tab.
                     70: .It Li \ev
                     71: And vertical tab.
                     72: .El
                     73: .Pp
1.6       wiz        74: In the
1.1       cgd        75: .Em ``C''
                     76: locale,
                     77: .Fn isspace
                     78: returns true only for the standard white-space characters.
                     79: .Sh RETURN VALUES
                     80: The
                     81: .Fn isspace
1.12      rillig     82: function returns zero if the character tests false and
1.1       cgd        83: returns non-zero if the character tests true.
                     84: .Sh SEE ALSO
1.13      rillig     85: .Xr ctype 3 ,
1.1       cgd        86: .Xr isalnum 3 ,
                     87: .Xr isalpha 3 ,
1.3       jtc        88: .Xr isascii 3 ,
                     89: .Xr isblank 3 ,
1.1       cgd        90: .Xr iscntrl 3 ,
                     91: .Xr isdigit 3 ,
                     92: .Xr isgraph 3 ,
                     93: .Xr islower 3 ,
                     94: .Xr isprint 3 ,
                     95: .Xr ispunct 3 ,
                     96: .Xr isupper 3 ,
                     97: .Xr isxdigit 3 ,
1.7       wiz        98: .Xr stdio 3 ,
1.1       cgd        99: .Xr toascii 3 ,
                    100: .Xr tolower 3 ,
                    101: .Xr toupper 3 ,
                    102: .Xr ascii 7
                    103: .Sh STANDARDS
                    104: The
                    105: .Fn isspace
                    106: function conforms to
                    107: .St -ansiC .
1.9       yamt      108: .Sh CAVEATS
                    109: The argument to
                    110: .Fn isspace
                    111: must be
                    112: .Dv EOF
                    113: or representable as an
1.14    ! apb       114: .Vt unsigned char ;
1.12      rillig    115: otherwise, the behavior is undefined.
1.14    ! apb       116: See the
        !           117: .Sx CAVEATS
        !           118: section of
        !           119: .Xr ctype 3
        !           120: for more details.

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