/interpreter/tags/at2-build270707/src/edu/vub/util/regexp/RETokenPOSIX.java
Java | 148 lines | 95 code | 13 blank | 40 comment | 23 complexity | 3afafbf50275becd95af7b812b9964c0 MD5 | raw file
1/* gnu/regexp/RETokenPOSIX.java 2 Copyright (C) 1998-2001, 2004 Free Software Foundation, Inc. 3 4This file is part of GNU Classpath. 5 6GNU Classpath is free software; you can redistribute it and/or modify 7it under the terms of the GNU General Public License as published by 8the Free Software Foundation; either version 2, or (at your option) 9any later version. 10 11GNU Classpath is distributed in the hope that it will be useful, but 12WITHOUT ANY WARRANTY; without even the implied warranty of 13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14General Public License for more details. 15 16You should have received a copy of the GNU General Public License 17along with GNU Classpath; see the file COPYING. If not, write to the 18Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 1902110-1301 USA. 20 21Linking this library statically or dynamically with other modules is 22making a combined work based on this library. Thus, the terms and 23conditions of the GNU General Public License cover the whole 24combination. 25 26As a special exception, the copyright holders of this library give you 27permission to link this library with independent modules to produce an 28executable, regardless of the license terms of these independent 29modules, and to copy and distribute the resulting executable under 30terms of your choice, provided that you also meet, for each linked 31independent module, the terms and conditions of the license of that 32module. An independent module is a module which is not derived from 33or based on this library. If you modify this library, you may extend 34this exception to your version of the library, but you are not 35obligated to do so. If you do not wish to do so, delete this 36exception statement from your version. */ 37 38 39package edu.vub.util.regexp; 40 41final class RETokenPOSIX extends REToken { 42 int type; 43 boolean insens; 44 boolean negated; 45 46 static final int ALNUM = 0; 47 static final int ALPHA = 1; 48 static final int BLANK = 2; 49 static final int CNTRL = 3; 50 static final int DIGIT = 4; 51 static final int GRAPH = 5; 52 static final int LOWER = 6; 53 static final int PRINT = 7; 54 static final int PUNCT = 8; 55 static final int SPACE = 9; 56 static final int UPPER = 10; 57 static final int XDIGIT = 11; 58 59 // Array indices correspond to constants defined above. 60 static final String[] s_nameTable = { 61 "alnum", "alpha", "blank", "cntrl", "digit", "graph", "lower", 62 "print", "punct", "space", "upper", "xdigit" 63 }; 64 65 // The RE constructor uses this to look up the constant for a string 66 static int intValue(String key) { 67 for (int i = 0; i < s_nameTable.length; i++) { 68 if (s_nameTable[i].equals(key)) return i; 69 } 70 return -1; 71 } 72 73 RETokenPOSIX(int subIndex, int type, boolean insens, boolean negated) { 74 super(subIndex); 75 this.type = type; 76 this.insens = insens; 77 this.negated = negated; 78 } 79 80 int getMinimumLength() { 81 return 1; 82 } 83 84 int getMaximumLength() { 85 return 1; 86 } 87 88 boolean match(CharIndexed input, REMatch mymatch) { 89 char ch = input.charAt(mymatch.index); 90 if (ch == CharIndexed.OUT_OF_BOUNDS) 91 return false; 92 93 boolean retval = false; 94 switch (type) { 95 case ALNUM: 96 // Note that there is some debate over whether '_' should be included 97 retval = Character.isLetterOrDigit(ch) || (ch == '_'); 98 break; 99 case ALPHA: 100 retval = Character.isLetter(ch); 101 break; 102 case BLANK: 103 retval = ((ch == ' ') || (ch == '\t')); 104 break; 105 case CNTRL: 106 retval = Character.isISOControl(ch); 107 break; 108 case DIGIT: 109 retval = Character.isDigit(ch); 110 break; 111 case GRAPH: 112 retval = (!(Character.isWhitespace(ch) || Character.isISOControl(ch))); 113 break; 114 case LOWER: 115 retval = ((insens && Character.isLetter(ch)) || Character.isLowerCase(ch)); 116 break; 117 case PRINT: 118 retval = (!(Character.isWhitespace(ch) || Character.isISOControl(ch))) 119 || (ch == ' '); 120 break; 121 case PUNCT: 122 // This feels sloppy, especially for non-U.S. locales. 123 retval = ("`~!@#$%^&*()-_=+[]{}\\|;:'\"/?,.<>".indexOf(ch)!=-1); 124 break; 125 case SPACE: 126 retval = Character.isWhitespace(ch); 127 break; 128 case UPPER: 129 retval = ((insens && Character.isLetter(ch)) || Character.isUpperCase(ch)); 130 break; 131 case XDIGIT: 132 retval = (Character.isDigit(ch) || ("abcdefABCDEF".indexOf(ch)!=-1)); 133 break; 134 } 135 136 if (negated) retval = !retval; 137 if (retval) { 138 ++mymatch.index; 139 return next(input, mymatch); 140 } 141 else return false; 142 } 143 144 void dump(StringBuffer os) { 145 if (negated) os.append('^'); 146 os.append("[:" + s_nameTable[type] + ":]"); 147 } 148}