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28 .\" @(#)ctype.3 8.1 (Berkeley) 6/4/93
29 .\" $FreeBSD: src/lib/libc/locale/ctype.3,v 1.18 2009/09/04 07:44:58 des Exp $
30 .\"
31 .Dd March 30, 2004
32 .Dt CTYPE 3
33 .Os
34 .Sh NAME
35 .Nm digittoint ,
36 .Nm isalnum ,
37 .Nm isalpha ,
38 .Nm isascii ,
39 .Nm isblank ,
40 .Nm iscntrl ,
41 .Nm isdigit ,
42 .Nm isgraph ,
43 .Nm ishexnumber ,
44 .Nm isideogram ,
45 .Nm islower ,
46 .Nm isnumber ,
47 .Nm isphonogram ,
48 .Nm isprint ,
49 .Nm ispunct ,
50 .Nm isrune ,
51 .Nm isspace ,
52 .Nm isspecial ,
53 .Nm isupper ,
54 .Nm isxdigit ,
55 .Nm toascii ,
56 .Nm tolower ,
57 .Nm toupper
58 .Nd character classification macros
59 .Sh LIBRARY
60 .Lb libc
61 .Sh SYNOPSIS
62 .In ctype.h
63 .Ft int
64 .Fn digittoint "int c"
65 .Ft int
66 .Fn isalnum "int c"
67 .Ft int
68 .Fn isalpha "int c"
69 .Ft int
70 .Fn isascii "int c"
71 .Ft int
72 .Fn iscntrl "int c"
73 .Ft int
74 .Fn isdigit "int c"
75 .Ft int
76 .Fn isgraph "int c"
77 .Ft int
78 .Fn ishexnumber "int c"
79 .Ft int
80 .Fn isideogram "int c"
81 .Ft int
82 .Fn islower "int c"
83 .Ft int
84 .Fn isnumber "int c"
85 .Ft int
86 .Fn isphonogram "int c"
87 .Ft int
88 .Fn isspecial "int c"
89 .Ft int
90 .Fn isprint "int c"
91 .Ft int
92 .Fn ispunct "int c"
93 .Ft int
94 .Fn isrune "int c"
95 .Ft int
96 .Fn isspace "int c"
97 .Ft int
98 .Fn isupper "int c"
99 .Ft int
100 .Fn isxdigit "int c"
101 .Ft int
102 .Fn toascii "int c"
103 .Ft int
104 .Fn tolower "int c"
105 .Ft int
106 .Fn toupper "int c"
107 .Sh DESCRIPTION
108 The above functions perform character tests and conversions on the integer
109 .Fa c .
110 They are available as macros, defined in the include file
111 .In ctype.h ,
112 or as true functions in the C library.
113 See the specific manual pages for more information.
114 .Pp
115 Extended locale versions of these functions are documented in
116 .Xr ctype_l 3 .
117 See
118 .Xr xlocale 3
119 for more information.
120 .Sh SEE ALSO
121 .Xr digittoint 3 ,
122 .Xr isalnum 3 ,
123 .Xr isalpha 3 ,
124 .Xr isascii 3 ,
125 .Xr isblank 3 ,
126 .Xr iscntrl 3 ,
127 .Xr isdigit 3 ,
128 .Xr isgraph 3 ,
129 .Xr isideogram 3 ,
130 .Xr islower 3 ,
131 .Xr isphonogram 3 ,
132 .Xr isprint 3 ,
133 .Xr ispunct 3 ,
134 .Xr isrune 3 ,
135 .Xr isspace 3 ,
136 .Xr isspecial 3 ,
137 .Xr isupper 3 ,
138 .Xr isxdigit 3 ,
139 .Xr toascii 3 ,
140 .Xr tolower 3 ,
141 .Xr toupper 3 ,
142 .Xr wctype 3 ,
143 .Xr ascii 7 ,
144 .Xr ctype_l 3
145 .Sh STANDARDS
146 These functions, except for
147 .Fn digittoint ,
148 .Fn isascii ,
149 .Fn ishexnumber ,
150 .Fn isideogram ,
151 .Fn isnumber ,
152 .Fn isphonogram ,
153 .Fn isrune ,
154 .Fn isspecial
155 and
156 .Fn toascii ,
157 conform to
158 .St -isoC .