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.
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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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