Initial revision

From-SVN: r102074

1 files changed, 91 insertions, 0 deletions

diff --git a/libjava/classpath/gnu/regexp/RETokenChar.java b/libjava/classpath/gnu/regexp/RETokenChar.java
new file mode 100644
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+++ b/libjava/classpath/gnu/regexp/RETokenChar.java
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+/* gnu/regexp/RETokenChar.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 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);
+  }
+}
+
+