1 '\" te
2 .\" Copyright 1989 AT&T. Copyright (c) 1992, X/Open Company Limited All Rights Reserved. Portions Copyright (c) 2005, Sun Microsystems, Inc. All Rights Reserved.
3 .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
4 .\" http://www.opengroup.org/bookstore/.
5 .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
6 .\" This notice shall appear on any product containing this material.
7 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
8 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
9 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
10 .TH CTYPE 3C "Jan 28, 2005"
11 .SH NAME
12 ctype, isalpha, isalnum, isascii, isblank, iscntrl, isdigit, islower, isprint,
13 isspace, isupper, ispunct, isgraph, isxdigit \- character handling
14 .SH SYNOPSIS
15 .LP
16 .nf
17 #include <ctype.h>
18
19 \fBint\fR \fBisalpha\fR(\fBint\fR \fIc\fR);
20 .fi
21
22 .LP
23 .nf
24 \fBint\fR \fBisalnum\fR(\fBint\fR \fIc\fR);
25 .fi
26
27 .LP
28 .nf
29 \fBint\fR \fBisascii\fR(\fBint\fR \fIc\fR);
30 .fi
83 .sp
84 .LP
85 These macros classify character-coded integer values. Each is a predicate
86 returning non-zero for true, \fB0\fR for false. The behavior of these macros,
87 except \fBisascii()\fR, is affected by the current locale (see
88 \fBsetlocale\fR(3C)). To modify the behavior, change the \fBLC_TYPE\fR category
89 in \fBsetlocale()\fR, that is, \fBsetlocale(\fR\fBLC_CTYPE\fR,
90 \fInewlocale\fR). In the "C" locale, or in a locale where character type
91 information is not defined, characters are classified according to the rules of
92 the \fBUS-ASCII\fR 7-bit coded character set.
93 .sp
94 .LP
95 The \fBisascii()\fR macro is defined on all integer values. The rest are
96 defined only where the argument is an \fBint\fR, the value of which is
97 representable as an \fBunsigned char\fR, or \fBEOF\fR, which is defined by the
98 <\fBstdio.h\fR> header and represents end-of-file.
99 .sp
100 .LP
101 Functions exist for all the macros defined below. To get the function form, the
102 macro name must be undefined (for example, \fB#undef isdigit\fR).
103 .sp
104 .LP
105 For macros described with \fBDefault\fR and \fBStandard conforming\fR versions,
106 standard-conforming behavior is provided for standard-conforming applications
107 (see \fBstandards\fR(5)) and for applications that define
108 \fB__XPG4_CHAR_CLASS__\fR before including <\fBctype.h\fR>.
109 .SS "Default"
110 .sp
111 .ne 2
112 .na
113 \fB\fBisalpha()\fR\fR
114 .ad
115 .RS 13n
116 Tests for any character for which \fBisupper()\fR or \fBislower()\fR is true.
117 .RE
118
119 .SS "Standard conforming"
120 .sp
121 .ne 2
122 .na
123 \fB\fBisalpha()\fR\fR
124 .ad
125 .RS 13n
126 Tests for any character for which \fBisupper()\fR or \fBislower()\fR is true,
127 or any character that is one of the current locale-defined set of characters
128 for which none of \fBiscntrl()\fR, \fBisdigit()\fR, \fBispunct()\fR, or
129 \fBisspace()\fR is true. In "C" locale, \fBisalpha()\fR returns true only for
130 the characters for which \fBisupper()\fR or \fBislower()\fR is true.
131 .RE
132
133 .sp
134 .ne 2
135 .na
136 \fB\fBisalnum()\fR\fR
137 .ad
138 .RS 13n
139 Tests for any character for which \fBisalpha()\fR or \fBisdigit()\fR is true
161 .RE
162
163 .sp
164 .ne 2
165 .na
166 \fB\fBiscntrl()\fR\fR
167 .ad
168 .RS 13n
169 Tests for any ``control character'' as defined by the character set.
170 .RE
171
172 .sp
173 .ne 2
174 .na
175 \fB\fBisdigit()\fR\fR
176 .ad
177 .RS 13n
178 Tests for any decimal-digit character.
179 .RE
180
181 .SS "Default"
182 .sp
183 .ne 2
184 .na
185 \fB\fBisgraph()\fR\fR
186 .ad
187 .RS 13n
188 Tests for any character for which \fBispunct()\fR, \fBisupper()\fR,
189 \fBislower()\fR, and \fBisdigit()\fR is true.
190 .RE
191
192 .SS "Standard conforming"
193 .sp
194 .ne 2
195 .na
196 \fB\fBisgraph()\fR\fR
197 .ad
198 .RS 13n
199 Tests for any character for which \fBisalnum()\fR and \fBispunct()\fR are true,
200 or any character in the current locale-defined "graph" class which is neither a
201 space ("\|") nor a character for which \fBiscntrl()\fR is true.
202 .RE
203
204 .sp
205 .ne 2
206 .na
207 \fB\fBislower()\fR\fR
208 .ad
209 .RS 13n
210 Tests for any character that is a lower-case letter or is one of the current
211 locale-defined set of characters for which none of \fBiscntrl()\fR,
212 \fBisdigit()\fR, \fBispunct()\fR, \fBisspace()\fR, or \fBisupper()\fR is true.
213 In the "C" locale, \fBislower()\fR returns true only for the characters defined
214 as lower-case \fBASCII\fR characters.
215 .RE
216
217 .SS "Default"
218 .sp
219 .ne 2
220 .na
221 \fB\fBisprint()\fR\fR
222 .ad
223 .RS 13n
224 Tests for any character for which \fBispunct()\fR, \fBisupper()\fR,
225 \fBislower()\fR, \fBisdigit()\fR, and the space character ("\|") is true.
226 .RE
227
228 .SS "Standard conforming"
229 .sp
230 .ne 2
231 .na
232 \fB\fBisprint()\fR\fR
233 .ad
234 .RS 13n
235 Tests for any character for which \fBiscntrl()\fR is false, and
236 \fBisalnum()\fR, \fBisgraph()\fR, \fBispunct()\fR, the space character ("\|"),
237 and the characters in the current locale-defined "print" class are true.
238 .RE
239
240 .sp
241 .ne 2
242 .na
243 \fB\fBispunct()\fR\fR
244 .ad
245 .RS 13n
246 Tests for any printing character which is neither a space ("\|") nor a
247 character for which \fBisalnum()\fR or \fBiscntrl()\fR is true.
248 .RE
249
250 .sp
251 .ne 2
252 .na
253 \fB\fBisspace()\fR\fR
254 .ad
255 .RS 13n
256 Tests for any space, tab, carriage-return, newline, vertical-tab or form-feed
257 (standard white-space characters) or for one of the current locale-defined set
258 of characters for which \fBisalnum()\fR is false. In the "C" locale,
259 \fBisspace()\fR returns true only for the standard white-space characters.
260 .RE
261
262 .sp
263 .ne 2
264 .na
265 \fB\fBisupper()\fR\fR
266 .ad
267 .RS 13n
268 Tests for any character that is an upper-case letter or is one of the current
269 locale-defined set of characters for which none of \fBiscntrl()\fR,
270 \fBisdigit()\fR, \fBispunct()\fR, \fBisspace()\fR, or \fBislower()\fR is true.
271 In the "C" locale, \fBisupper()\fR returns true only for the characters defined
272 as upper-case \fBASCII\fR characters.
273 .RE
274
275 .SS "Default"
276 .sp
277 .ne 2
278 .na
279 \fB\fBisxdigit()\fR\fR
280 .ad
281 .RS 14n
282 Tests for any hexadecimal-digit character (\fB[0\(mi9]\fR, \fB[A\(miF]\fR, or
283 \fB[a\(mif]\fR).
284 .RE
285
286 .SS "Standard conforming"
287 .sp
288 .ne 2
289 .na
290 \fB\fBisxdigit()\fR\fR
291 .ad
292 .RS 14n
293 Tests for any hexadecimal-digit character (\fB[0\(mi9]\fR, \fB[A\(miF]\fR, or
294 \fB[a\(mif]\fR or the current locale-defined sets of characters representing
295 the hexadecimal digits \fB10\fR to \fB15\fR inclusive). In the "C" locale, only
296 .sp
297 .in +2
298 .nf
299 0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f
300 .fi
301 .in -2
302
303 are included.
304 .RE
305
306 .SH RETURN VALUES
307 .sp
308 .LP
|
1 '\" te
2 .\" Copyright 2013 Garrett D'Amore <garrett@damore.org>
3 .\" Copyright 1989 AT&T. Copyright (c) 1992, X/Open Company Limited All Rights Reserved. Portions Copyright (c) 2005, Sun Microsystems, Inc. All Rights Reserved.
4 .\" Sun Microsystems, Inc. gratefully acknowledges The Open Group for permission to reproduce portions of its copyrighted documentation. Original documentation from The Open Group can be obtained online at
5 .\" http://www.opengroup.org/bookstore/.
6 .\" The Institute of Electrical and Electronics Engineers and The Open Group, have given us permission to reprint portions of their documentation. In the following statement, the phrase "this text" refers to portions of the system documentation. Portions of this text are reprinted and reproduced in electronic form in the Sun OS Reference Manual, from IEEE Std 1003.1, 2004 Edition, Standard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6, Copyright (C) 2001-2004 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between these versions and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html.
7 .\" This notice shall appear on any product containing this material.
8 .\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License"). You may not use this file except in compliance with the License.
9 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing. See the License for the specific language governing permissions and limitations under the License.
10 .\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE. If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
11 .TH CTYPE 3C "Sep 18, 2013"
12 .SH NAME
13 ctype, isalpha, isalnum, isascii, isblank, iscntrl, isdigit, islower, isprint,
14 isspace, isupper, ispunct, isgraph, isxdigit \- character handling
15 .SH SYNOPSIS
16 .LP
17 .nf
18 #include <ctype.h>
19
20 \fBint\fR \fBisalpha\fR(\fBint\fR \fIc\fR);
21 .fi
22
23 .LP
24 .nf
25 \fBint\fR \fBisalnum\fR(\fBint\fR \fIc\fR);
26 .fi
27
28 .LP
29 .nf
30 \fBint\fR \fBisascii\fR(\fBint\fR \fIc\fR);
31 .fi
84 .sp
85 .LP
86 These macros classify character-coded integer values. Each is a predicate
87 returning non-zero for true, \fB0\fR for false. The behavior of these macros,
88 except \fBisascii()\fR, is affected by the current locale (see
89 \fBsetlocale\fR(3C)). To modify the behavior, change the \fBLC_TYPE\fR category
90 in \fBsetlocale()\fR, that is, \fBsetlocale(\fR\fBLC_CTYPE\fR,
91 \fInewlocale\fR). In the "C" locale, or in a locale where character type
92 information is not defined, characters are classified according to the rules of
93 the \fBUS-ASCII\fR 7-bit coded character set.
94 .sp
95 .LP
96 The \fBisascii()\fR macro is defined on all integer values. The rest are
97 defined only where the argument is an \fBint\fR, the value of which is
98 representable as an \fBunsigned char\fR, or \fBEOF\fR, which is defined by the
99 <\fBstdio.h\fR> header and represents end-of-file.
100 .sp
101 .LP
102 Functions exist for all the macros defined below. To get the function form, the
103 macro name must be undefined (for example, \fB#undef isdigit\fR).
104
105 .sp
106 .ne 2
107 .na
108 \fB\fBisalpha()\fR\fR
109 .ad
110 .RS 13n
111 Tests for any character for which \fBisupper()\fR or \fBislower()\fR is true,
112 or any character that is one of the current locale-defined set of characters
113 for which none of \fBiscntrl()\fR, \fBisdigit()\fR, \fBispunct()\fR, or
114 \fBisspace()\fR is true. In "C" locale, \fBisalpha()\fR returns true only for
115 the characters for which \fBisupper()\fR or \fBislower()\fR is true.
116 .RE
117
118 .sp
119 .ne 2
120 .na
121 \fB\fBisalnum()\fR\fR
122 .ad
123 .RS 13n
124 Tests for any character for which \fBisalpha()\fR or \fBisdigit()\fR is true
146 .RE
147
148 .sp
149 .ne 2
150 .na
151 \fB\fBiscntrl()\fR\fR
152 .ad
153 .RS 13n
154 Tests for any ``control character'' as defined by the character set.
155 .RE
156
157 .sp
158 .ne 2
159 .na
160 \fB\fBisdigit()\fR\fR
161 .ad
162 .RS 13n
163 Tests for any decimal-digit character.
164 .RE
165
166 .sp
167 .ne 2
168 .na
169 \fB\fBisgraph()\fR\fR
170 .ad
171 .RS 13n
172 Tests for any character for which \fBisalnum()\fR and \fBispunct()\fR are true,
173 or any character in the current locale-defined "graph" class which is neither a
174 space ("\|") nor a character for which \fBiscntrl()\fR is true.
175 .RE
176
177 .sp
178 .ne 2
179 .na
180 \fB\fBislower()\fR\fR
181 .ad
182 .RS 13n
183 Tests for any character that is a lower-case letter or is one of the current
184 locale-defined set of characters for which none of \fBiscntrl()\fR,
185 \fBisdigit()\fR, \fBispunct()\fR, \fBisspace()\fR, or \fBisupper()\fR is true.
186 In the "C" locale, \fBislower()\fR returns true only for the characters defined
187 as lower-case \fBASCII\fR characters.
188 .RE
189
190 .sp
191 .ne 2
192 .na
193 \fB\fBisprint()\fR\fR
194 .ad
195 .RS 13n
196 Tests for any character for which \fBiscntrl()\fR is false, and
197 \fBisalnum()\fR, \fBisgraph()\fR, \fBispunct()\fR, the space character ("\|"),
198 and the characters in the current locale-defined "print" class are true.
199 .RE
200
201 .sp
202 .ne 2
203 .na
204 \fB\fBispunct()\fR\fR
205 .ad
206 .RS 13n
207 Tests for any printing character which is neither a space ("\|") nor a
208 character for which \fBisalnum()\fR or \fBiscntrl()\fR is true.
209 .RE
210
211 .sp
212 .ne 2
213 .na
214 \fB\fBisspace()\fR\fR
215 .ad
216 .RS 13n
217 Tests for any space, tab, carriage-return, newline, vertical-tab or form-feed
218 (standard white-space characters) or for one of the current locale-defined set
219 of characters for which \fBisalnum()\fR is false. In the "C" locale,
220 \fBisspace()\fR returns true only for the standard white-space characters.
221 .RE
222
223 .sp
224 .ne 2
225 .na
226 \fB\fBisupper()\fR\fR
227 .ad
228 .RS 13n
229 Tests for any character that is an upper-case letter or is one of the current
230 locale-defined set of characters for which none of \fBiscntrl()\fR,
231 \fBisdigit()\fR, \fBispunct()\fR, \fBisspace()\fR, or \fBislower()\fR is true.
232 In the "C" locale, \fBisupper()\fR returns true only for the characters defined
233 as upper-case \fBASCII\fR characters.
234 .RE
235
236 .sp
237 .ne 2
238 .na
239 \fB\fBisxdigit()\fR\fR
240 .ad
241 .RS 14n
242 Tests for any hexadecimal-digit character (\fB[0\(mi9]\fR, \fB[A\(miF]\fR, or
243 \fB[a\(mif]\fR or the current locale-defined sets of characters representing
244 the hexadecimal digits \fB10\fR to \fB15\fR inclusive). In the "C" locale, only
245 .sp
246 .in +2
247 .nf
248 0 1 2 3 4 5 6 7 8 9 A B C D E F a b c d e f
249 .fi
250 .in -2
251
252 are included.
253 .RE
254
255 .SH RETURN VALUES
256 .sp
257 .LP
|