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