1 /*
2  * Copyright (c) 2011, 2013, 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.
8  *
9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  */
23 
24 import java.util.HashMap;
25 import java.util.Locale;
26 
27 public final class POSIX_Unicode {
28 
isAlpha(int ch)29     public static boolean isAlpha(int ch) {
30         return Character.isAlphabetic(ch);
31     }
32 
isLower(int ch)33     public static boolean isLower(int ch) {
34         return Character.isLowerCase(ch);
35     }
36 
isUpper(int ch)37     public static boolean isUpper(int ch) {
38         return Character.isUpperCase(ch);
39     }
40 
41     // \p{Whitespace}
isSpace(int ch)42     public static boolean isSpace(int ch) {
43         return ((((1 << Character.SPACE_SEPARATOR) |
44                   (1 << Character.LINE_SEPARATOR) |
45                   (1 << Character.PARAGRAPH_SEPARATOR)) >> Character.getType(ch)) & 1)
46                    != 0 ||
47                (ch >= 0x9 && ch <= 0xd) ||
48                (ch == 0x85);
49     }
50 
51     // \p{gc=Control}
isCntrl(int ch)52     public static boolean isCntrl(int ch) {
53         return Character.getType(ch) == Character.CONTROL;
54     }
55 
56     // \p{gc=Punctuation}
isPunct(int ch)57     public static boolean isPunct(int ch) {
58         return ((((1 << Character.CONNECTOR_PUNCTUATION) |
59                   (1 << Character.DASH_PUNCTUATION) |
60                   (1 << Character.START_PUNCTUATION) |
61                   (1 << Character.END_PUNCTUATION) |
62                   (1 << Character.OTHER_PUNCTUATION) |
63                   (1 << Character.INITIAL_QUOTE_PUNCTUATION) |
64                   (1 << Character.FINAL_QUOTE_PUNCTUATION)) >> Character.getType(ch)) & 1)
65               != 0;
66     }
67 
68     // \p{gc=Decimal_Number}
69     // \p{Hex_Digit}    -> PropList.txt: Hex_Digit
isHexDigit(int ch)70     public static boolean isHexDigit(int ch) {
71         return Character.isDigit(ch) ||
72                (ch >= 0x0030 && ch <= 0x0039) ||
73                (ch >= 0x0041 && ch <= 0x0046) ||
74                (ch >= 0x0061 && ch <= 0x0066) ||
75                (ch >= 0xFF10 && ch <= 0xFF19) ||
76                (ch >= 0xFF21 && ch <= 0xFF26) ||
77                (ch >= 0xFF41 && ch <= 0xFF46);
78     }
79 
80     // \p{gc=Decimal_Number}
isDigit(int ch)81     public static boolean isDigit(int ch) {
82         return Character.isDigit(ch);
83     };
84 
85     // \p{alpha}
86     // \p{digit}
isAlnum(int ch)87     public static boolean isAlnum(int ch) {
88         return Character.isAlphabetic(ch) || Character.isDigit(ch);
89     }
90 
91     // \p{Whitespace} --
92     // [\N{LF} \N{VT} \N{FF} \N{CR} \N{NEL}  -> 0xa, 0xb, 0xc, 0xd, 0x85
93     //  \p{gc=Line_Separator}
94     //  \p{gc=Paragraph_Separator}]
isBlank(int ch)95     public static boolean isBlank(int ch) {
96         int type = Character.getType(ch);
97         return isSpace(ch) &&
98                ch != 0xa & ch != 0xb && ch !=0xc && ch != 0xd && ch != 0x85 &&
99                type != Character.LINE_SEPARATOR &&
100                type != Character.PARAGRAPH_SEPARATOR;
101     }
102 
103     // [^
104     //  \p{space}
105     //  \p{gc=Control}
106     //  \p{gc=Surrogate}
107     //  \p{gc=Unassigned}]
isGraph(int ch)108     public static boolean isGraph(int ch) {
109         int type = Character.getType(ch);
110         return !(isSpace(ch) ||
111                  Character.CONTROL == type ||
112                  Character.SURROGATE == type ||
113                  Character.UNASSIGNED == type);
114     }
115 
116     // \p{graph}
117     // \p{blank}
118     // -- \p{cntrl}
isPrint(int ch)119     public static boolean isPrint(int ch) {
120         return (isGraph(ch) || isBlank(ch)) && !isCntrl(ch);
121     }
122 
123     // PropList.txt:Noncharacter_Code_Point
isNoncharacterCodePoint(int ch)124     public static boolean isNoncharacterCodePoint(int ch) {
125         return (ch & 0xfffe) == 0xfffe || (ch >= 0xfdd0 && ch <= 0xfdef);
126     }
127 
isJoinControl(int ch)128     public static boolean isJoinControl(int ch) {
129         return (ch == 0x200C || ch == 0x200D);
130     }
131 
132     //  \p{alpha}
133     //  \p{gc=Mark}
134     //  \p{digit}
135     //  \p{gc=Connector_Punctuation}
isWord(int ch)136     public static boolean isWord(int ch) {
137         return isAlpha(ch) ||
138                ((((1 << Character.NON_SPACING_MARK) |
139                   (1 << Character.ENCLOSING_MARK) |
140                   (1 << Character.COMBINING_SPACING_MARK) |
141                   (1 << Character.CONNECTOR_PUNCTUATION)) >> Character.getType(ch)) & 1)
142                != 0 ||
143                isDigit(ch) ||
144                isJoinControl(ch);
145     }
146 }
147