* gnu/xml/*: Imported from GNU JAXP.

       * javax/xml/*: Likewise.
       * external/*: Imported external sax and w3c_dom projects.
       * LICENSE: Add new copyright and distribution notices.
       * Makefile.am (SUBDirs): Add external.
       (DIST_SUBDIRS): Likewise.
       * configure.ac (AC_CONFIG_FILES): Add external/Makefile,
       external/sax/Makefile and external/w3c_dom/Makefile.
       * lib/gen-classlist.sh.in (FIND): Search in external/sax and
       external/w3c_dom.
       (Split): Add new classes.xml for gcj.
       * lib/Makefile.am (compile_classpath): Add external/sax and
       external/w3c_dom.
       (FOUND_GCJ): Compile classes.xml.
       * lib/.cvsignore: Add classes.xml.
       * .classpath: Updated exclusion filter and add external projects plus
       examples.

1 files changed, 148 insertions, 0 deletions

diff --git a/gnu/xml/xpath/ArithmeticExpr.java b/gnu/xml/xpath/ArithmeticExpr.java
new file mode 100644
index 000000000..ad9da1ee7
--- /dev/null
+++ b/gnu/xml/xpath/ArithmeticExpr.java
@@ -0,0 +1,148 @@
+/* ArithmeticExpr.java -- 
+   Copyright (C) 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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 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.xml.xpath;
+
+import org.w3c.dom.Node;
+
+/**
+ * Binary arithmetic expression.
+ *
+ * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a>
+ */
+final class ArithmeticExpr
+  extends Expr
+{
+
+  static final int ADD = 0;
+  static final int SUBTRACT = 1;
+  static final int MULTIPLY = 2;
+  static final int DIVIDE = 3;
+  static final int MODULO = 4;
+
+  final Expr lhs;
+  final Expr rhs;
+  final int op;
+
+  ArithmeticExpr(Expr lhs, Expr rhs, int op)
+  {
+    this.lhs = lhs;
+    this.rhs = rhs;
+    switch (op)
+      {
+      case ADD:
+      case SUBTRACT:
+      case MULTIPLY:
+      case DIVIDE:
+      case MODULO:
+				this.op = op;
+				break;
+      default:
+        throw new IllegalArgumentException();
+      }
+  }
+
+  public Object evaluate(Node context, int pos, int len)
+  {
+    Object left = lhs.evaluate(context, pos, len);
+    Object right = rhs.evaluate(context, pos, len);
+
+    double ln = _number(context, left);
+    double rn = _number(context, right);
+    switch (op)
+      {
+      case ADD:
+        return new Double(ln + rn);
+      case SUBTRACT:
+        return new Double(ln - rn);
+      case MULTIPLY:
+        return new Double(ln * rn);
+      case DIVIDE:
+        if (rn == 0.0d || rn == -0.0d)
+          {
+            return new Double(ln < 0.0d ?
+                              Double.NEGATIVE_INFINITY :
+                              Double.POSITIVE_INFINITY);
+          }
+        return new Double(ln / rn);
+      case MODULO:
+        if (rn == 0.0d || rn == -0.0d)
+          {
+            return new Double(ln < 0.0d ?
+                              Double.NEGATIVE_INFINITY :
+                              Double.POSITIVE_INFINITY);
+          }
+        return new Double(ln % rn);
+      default:
+        throw new IllegalStateException();
+      }
+  }
+
+  public Expr clone(Object context)
+  {
+    return new ArithmeticExpr(lhs.clone(context), rhs.clone(context), op);
+  }
+
+  public String toString()
+  {
+    StringBuffer buf = new StringBuffer();
+    buf.append(lhs);
+    buf.append(' ');
+    switch (op)
+      {
+      case ADD:
+        buf.append('+');
+        break;
+      case SUBTRACT:
+        buf.append('-');
+        break;
+      case MULTIPLY:
+        buf.append('*');
+        break;
+      case DIVIDE:
+        buf.append("div");
+        break;
+      case MODULO:
+        buf.append("mod");
+        break;
+      }
+    buf.append(' ');
+    buf.append(rhs);
+    return buf.toString();
+  }
+  
+}