--- /dev/null
+/*
+ * gnu/regexp/RETokenChar.java
+ * Copyright (C) 1998-2001 Wes Biggs
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ *
+ * This library 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 Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+package gnu.regexp;
+
+final class RETokenChar extends REToken {
+ private char[] ch;
+ private boolean insens;
+
+ RETokenChar(int subIndex, char c, boolean ins) {
+ super(subIndex);
+ ch = new char [1];
+ ch[0] = (insens = ins) ? Character.toLowerCase(c) : c;
+ }
+
+ int getMinimumLength() {
+ return ch.length;
+ }
+
+ boolean match(CharIndexed input, REMatch mymatch) {
+ int z = ch.length;
+ char c;
+ for (int i=0; i<z; i++) {
+ c = input.charAt(mymatch.index+i);
+ if (( (insens) ? Character.toLowerCase(c) : c ) != ch[i]) {
+ return false;
+ }
+ }
+ mymatch.index += z;
+
+ return next(input, mymatch);
+ }
+
+ // Overrides REToken.chain() to optimize for strings
+ boolean chain(REToken next) {
+ if (next instanceof RETokenChar) {
+ RETokenChar cnext = (RETokenChar) next;
+ // assume for now that next can only be one character
+ int newsize = ch.length + cnext.ch.length;
+
+ char[] chTemp = new char [newsize];
+
+ System.arraycopy(ch,0,chTemp,0,ch.length);
+ System.arraycopy(cnext.ch,0,chTemp,ch.length,cnext.ch.length);
+
+ ch = chTemp;
+ return false;
+ } else return super.chain(next);
+ }
+
+ void dump(StringBuffer os) {
+ os.append(ch);
+ }
+}
+
+