1 /*
2 * Copyright (c) 1999, 2000, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package java.util.regex;
27
28
29 /**
30 * Utility class that implements the standard C ctype functionality.
31 *
32 * @author Hong Zhang
33 */
34
35 final class ASCII {
36
37 static final int UPPER = 0x00000100;
38
39 static final int LOWER = 0x00000200;
40
41 static final int DIGIT = 0x00000400;
42
43 static final int SPACE = 0x00000800;
44
45 static final int PUNCT = 0x00001000;
46
47 static final int CNTRL = 0x00002000;
48
49 static final int BLANK = 0x00004000;
50
51 static final int HEX = 0x00008000;
52
53 static final int UNDER = 0x00010000;
54
55 static final int ASCII = 0x0000FF00;
56
57 static final int ALPHA = (UPPER|LOWER);
58
59 static final int ALNUM = (UPPER|LOWER|DIGIT);
60
61 static final int GRAPH = (PUNCT|UPPER|LOWER|DIGIT);
62
63 static final int WORD = (UPPER|LOWER|UNDER|DIGIT);
64
65 static final int XDIGIT = (HEX);
66
67 private static final int[] ctype = new int[] {
68 CNTRL, /* 00 (NUL) */
69 CNTRL, /* 01 (SOH) */
70 CNTRL, /* 02 (STX) */
71 CNTRL, /* 03 (ETX) */
72 CNTRL, /* 04 (EOT) */
73 CNTRL, /* 05 (ENQ) */
74 CNTRL, /* 06 (ACK) */
75 CNTRL, /* 07 (BEL) */
76 CNTRL, /* 08 (BS) */
77 SPACE+CNTRL+BLANK, /* 09 (HT) */
78 SPACE+CNTRL, /* 0A (LF) */
79 SPACE+CNTRL, /* 0B (VT) */
80 SPACE+CNTRL, /* 0C (FF) */
81 SPACE+CNTRL, /* 0D (CR) */
82 CNTRL, /* 0E (SI) */
83 CNTRL, /* 0F (SO) */
84 CNTRL, /* 10 (DLE) */
85 CNTRL, /* 11 (DC1) */
86 CNTRL, /* 12 (DC2) */
87 CNTRL, /* 13 (DC3) */
88 CNTRL, /* 14 (DC4) */
89 CNTRL, /* 15 (NAK) */
90 CNTRL, /* 16 (SYN) */
91 CNTRL, /* 17 (ETB) */
92 CNTRL, /* 18 (CAN) */
93 CNTRL, /* 19 (EM) */
94 CNTRL, /* 1A (SUB) */
95 CNTRL, /* 1B (ESC) */
96 CNTRL, /* 1C (FS) */
97 CNTRL, /* 1D (GS) */
98 CNTRL, /* 1E (RS) */
99 CNTRL, /* 1F (US) */
100 SPACE+BLANK, /* 20 SPACE */
101 PUNCT, /* 21 ! */
102 PUNCT, /* 22 " */
103 PUNCT, /* 23 # */
104 PUNCT, /* 24 $ */
105 PUNCT, /* 25 % */
106 PUNCT, /* 26 & */
107 PUNCT, /* 27 ' */
108 PUNCT, /* 28 ( */
109 PUNCT, /* 29 ) */
110 PUNCT, /* 2A * */
111 PUNCT, /* 2B + */
112 PUNCT, /* 2C , */
113 PUNCT, /* 2D - */
114 PUNCT, /* 2E . */
115 PUNCT, /* 2F / */
116 DIGIT+HEX+0, /* 30 0 */
117 DIGIT+HEX+1, /* 31 1 */
118 DIGIT+HEX+2, /* 32 2 */
119 DIGIT+HEX+3, /* 33 3 */
120 DIGIT+HEX+4, /* 34 4 */
121 DIGIT+HEX+5, /* 35 5 */
122 DIGIT+HEX+6, /* 36 6 */
123 DIGIT+HEX+7, /* 37 7 */
124 DIGIT+HEX+8, /* 38 8 */
125 DIGIT+HEX+9, /* 39 9 */
126 PUNCT, /* 3A : */
127 PUNCT, /* 3B ; */
128 PUNCT, /* 3C < */
129 PUNCT, /* 3D = */
130 PUNCT, /* 3E > */
131 PUNCT, /* 3F ? */
132 PUNCT, /* 40 @ */
133 UPPER+HEX+10, /* 41 A */
134 UPPER+HEX+11, /* 42 B */
135 UPPER+HEX+12, /* 43 C */
136 UPPER+HEX+13, /* 44 D */
137 UPPER+HEX+14, /* 45 E */
138 UPPER+HEX+15, /* 46 F */
139 UPPER+16, /* 47 G */
140 UPPER+17, /* 48 H */
141 UPPER+18, /* 49 I */
142 UPPER+19, /* 4A J */
143 UPPER+20, /* 4B K */
144 UPPER+21, /* 4C L */
145 UPPER+22, /* 4D M */
146 UPPER+23, /* 4E N */
147 UPPER+24, /* 4F O */
148 UPPER+25, /* 50 P */
149 UPPER+26, /* 51 Q */
150 UPPER+27, /* 52 R */
151 UPPER+28, /* 53 S */
152 UPPER+29, /* 54 T */
153 UPPER+30, /* 55 U */
154 UPPER+31, /* 56 V */
155 UPPER+32, /* 57 W */
156 UPPER+33, /* 58 X */
157 UPPER+34, /* 59 Y */
158 UPPER+35, /* 5A Z */
159 PUNCT, /* 5B [ */
160 PUNCT, /* 5C \ */
161 PUNCT, /* 5D ] */
162 PUNCT, /* 5E ^ */
163 PUNCT|UNDER, /* 5F _ */
164 PUNCT, /* 60 ` */
165 LOWER+HEX+10, /* 61 a */
166 LOWER+HEX+11, /* 62 b */
167 LOWER+HEX+12, /* 63 c */
168 LOWER+HEX+13, /* 64 d */
169 LOWER+HEX+14, /* 65 e */
170 LOWER+HEX+15, /* 66 f */
171 LOWER+16, /* 67 g */
172 LOWER+17, /* 68 h */
173 LOWER+18, /* 69 i */
174 LOWER+19, /* 6A j */
175 LOWER+20, /* 6B k */
176 LOWER+21, /* 6C l */
177 LOWER+22, /* 6D m */
178 LOWER+23, /* 6E n */
179 LOWER+24, /* 6F o */
180 LOWER+25, /* 70 p */
181 LOWER+26, /* 71 q */
182 LOWER+27, /* 72 r */
183 LOWER+28, /* 73 s */
184 LOWER+29, /* 74 t */
185 LOWER+30, /* 75 u */
186 LOWER+31, /* 76 v */
187 LOWER+32, /* 77 w */
188 LOWER+33, /* 78 x */
189 LOWER+34, /* 79 y */
190 LOWER+35, /* 7A z */
191 PUNCT, /* 7B { */
192 PUNCT, /* 7C | */
193 PUNCT, /* 7D } */
194 PUNCT, /* 7E ~ */
195 CNTRL, /* 7F (DEL) */
196 };
197
198 static int getType(int ch) {
199 return ((ch & 0xFFFFFF80) == 0 ? ctype[ch] : 0);
200 }
201
202 static boolean isType(int ch, int type) {
203 return (getType(ch) & type) != 0;
204 }
205
206 static boolean isAscii(int ch) {
207 return ((ch & 0xFFFFFF80) == 0);
208 }
209
210 static boolean isAlpha(int ch) {
211 return isType(ch, ALPHA);
212 }
213
214 static boolean isDigit(int ch) {
215 return ((ch-'0')|('9'-ch)) >= 0;
216 }
217
218 static boolean isAlnum(int ch) {
219 return isType(ch, ALNUM);
220 }
221
222 static boolean isGraph(int ch) {
223 return isType(ch, GRAPH);
224 }
225
226 static boolean isPrint(int ch) {
227 return ((ch-0x20)|(0x7E-ch)) >= 0;
228 }
229
230 static boolean isPunct(int ch) {
231 return isType(ch, PUNCT);
232 }
233
234 static boolean isSpace(int ch) {
235 return isType(ch, SPACE);
236 }
237
238 static boolean isHexDigit(int ch) {
239 return isType(ch, HEX);
240 }
241
242 static boolean isOctDigit(int ch) {
243 return ((ch-'0')|('7'-ch)) >= 0;
244 }
245
246 static boolean isCntrl(int ch) {
247 return isType(ch, CNTRL);
248 }
249
250 static boolean isLower(int ch) {
251 return ((ch-'a')|('z'-ch)) >= 0;
252 }
253
254 static boolean isUpper(int ch) {
255 return ((ch-'A')|('Z'-ch)) >= 0;
256 }
257
258 static boolean isWord(int ch) {
259 return isType(ch, WORD);
260 }
261
262 static int toDigit(int ch) {
263 return (ctype[ch & 0x7F] & 0x3F);
264 }
265
266 static int toLower(int ch) {
267 return isUpper(ch) ? (ch + 0x20) : ch;
268 }
269
270 static int toUpper(int ch) {
271 return isLower(ch) ? (ch - 0x20) : ch;
272 }
273
274 }