/interpreter/tags/at2-build190607/src/edu/vub/util/regexp/RETokenPOSIX.java
http://ambienttalk.googlecode.com/ · Java · 148 lines · 95 code · 13 blank · 40 comment · 23 complexity · 3afafbf50275becd95af7b812b9964c0 MD5 · raw file
- /* gnu/regexp/RETokenPOSIX.java
- Copyright (C) 1998-2001, 2004 Free Software Foundation, Inc.
- This file is part of GNU Classpath.
- GNU Classpath is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
- GNU Classpath is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
- You should have received a copy of the GNU General Public License
- along with GNU Classpath; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301 USA.
- Linking this library statically or dynamically with other modules is
- making a combined work based on this library. Thus, the terms and
- conditions of the GNU General Public License cover the whole
- combination.
- As a special exception, the copyright holders of this library give you
- permission to link this library with independent modules to produce an
- executable, regardless of the license terms of these independent
- modules, and to copy and distribute the resulting executable under
- terms of your choice, provided that you also meet, for each linked
- independent module, the terms and conditions of the license of that
- module. An independent module is a module which is not derived from
- or based on this library. If you modify this library, you may extend
- this exception to your version of the library, but you are not
- obligated to do so. If you do not wish to do so, delete this
- exception statement from your version. */
- package edu.vub.util.regexp;
- final class RETokenPOSIX extends REToken {
- int type;
- boolean insens;
- boolean negated;
- static final int ALNUM = 0;
- static final int ALPHA = 1;
- static final int BLANK = 2;
- static final int CNTRL = 3;
- static final int DIGIT = 4;
- static final int GRAPH = 5;
- static final int LOWER = 6;
- static final int PRINT = 7;
- static final int PUNCT = 8;
- static final int SPACE = 9;
- static final int UPPER = 10;
- static final int XDIGIT = 11;
- // Array indices correspond to constants defined above.
- static final String[] s_nameTable = {
- "alnum", "alpha", "blank", "cntrl", "digit", "graph", "lower",
- "print", "punct", "space", "upper", "xdigit"
- };
- // The RE constructor uses this to look up the constant for a string
- static int intValue(String key) {
- for (int i = 0; i < s_nameTable.length; i++) {
- if (s_nameTable[i].equals(key)) return i;
- }
- return -1;
- }
- RETokenPOSIX(int subIndex, int type, boolean insens, boolean negated) {
- super(subIndex);
- this.type = type;
- this.insens = insens;
- this.negated = negated;
- }
- int getMinimumLength() {
- return 1;
- }
- int getMaximumLength() {
- return 1;
- }
- boolean match(CharIndexed input, REMatch mymatch) {
- char ch = input.charAt(mymatch.index);
- if (ch == CharIndexed.OUT_OF_BOUNDS)
- return false;
-
- boolean retval = false;
- switch (type) {
- case ALNUM:
- // Note that there is some debate over whether '_' should be included
- retval = Character.isLetterOrDigit(ch) || (ch == '_');
- break;
- case ALPHA:
- retval = Character.isLetter(ch);
- break;
- case BLANK:
- retval = ((ch == ' ') || (ch == '\t'));
- break;
- case CNTRL:
- retval = Character.isISOControl(ch);
- break;
- case DIGIT:
- retval = Character.isDigit(ch);
- break;
- case GRAPH:
- retval = (!(Character.isWhitespace(ch) || Character.isISOControl(ch)));
- break;
- case LOWER:
- retval = ((insens && Character.isLetter(ch)) || Character.isLowerCase(ch));
- break;
- case PRINT:
- retval = (!(Character.isWhitespace(ch) || Character.isISOControl(ch)))
- || (ch == ' ');
- break;
- case PUNCT:
- // This feels sloppy, especially for non-U.S. locales.
- retval = ("`~!@#$%^&*()-_=+[]{}\\|;:'\"/?,.<>".indexOf(ch)!=-1);
- break;
- case SPACE:
- retval = Character.isWhitespace(ch);
- break;
- case UPPER:
- retval = ((insens && Character.isLetter(ch)) || Character.isUpperCase(ch));
- break;
- case XDIGIT:
- retval = (Character.isDigit(ch) || ("abcdefABCDEF".indexOf(ch)!=-1));
- break;
- }
- if (negated) retval = !retval;
- if (retval) {
- ++mymatch.index;
- return next(input, mymatch);
- }
- else return false;
- }
- void dump(StringBuffer os) {
- if (negated) os.append('^');
- os.append("[:" + s_nameTable[type] + ":]");
- }
- }