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

1.14    ! apb         1: .\"    $NetBSD: isdigit.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: .\"     @(#)isdigit.3  5.2 (Berkeley) 6/29/91
1.1       cgd        35: .\"
1.14    ! apb        36: .Dd April 17, 2008
1.1       cgd        37: .Dt ISDIGIT 3
                     38: .Os
                     39: .Sh NAME
                     40: .Nm isdigit
                     41: .Nd decimal-digit 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 isdigit "int c"
                     48: .Sh DESCRIPTION
                     49: The
                     50: .Fn isdigit
                     51: function tests for any decimal-digit character.
                     52: .Sh RETURN VALUES
                     53: The
                     54: .Fn isdigit
1.12      rillig     55: function returns zero if the character tests false and
1.1       cgd        56: returns non-zero if the character tests true.
                     57: .Sh SEE ALSO
1.13      rillig     58: .Xr ctype 3 ,
1.1       cgd        59: .Xr isalnum 3 ,
                     60: .Xr isalpha 3 ,
1.3       jtc        61: .Xr isascii 3 ,
                     62: .Xr isblank 3 ,
1.1       cgd        63: .Xr iscntrl 3 ,
                     64: .Xr isgraph 3 ,
                     65: .Xr islower 3 ,
                     66: .Xr isprint 3 ,
                     67: .Xr ispunct 3 ,
                     68: .Xr isspace 3 ,
                     69: .Xr isupper 3 ,
                     70: .Xr isxdigit 3 ,
1.6       wiz        71: .Xr stdio 3 ,
1.1       cgd        72: .Xr toascii 3 ,
                     73: .Xr tolower 3 ,
                     74: .Xr toupper 3 ,
                     75: .Xr ascii 7
                     76: .Sh STANDARDS
                     77: The
                     78: .Fn isdigit
                     79: function conforms to
                     80: .St -ansiC .
1.8       yamt       81: .Sh CAVEATS
                     82: The argument to
                     83: .Fn isdigit
                     84: must be
                     85: .Dv EOF
                     86: or representable as an
1.14    ! apb        87: .Vt unsigned char ;
1.12      rillig     88: otherwise, the behavior is undefined.
1.14    ! apb        89: See the
        !            90: .Sx CAVEATS
        !            91: section of
        !            92: .Xr ctype 3
        !            93: for more details.

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