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+/* gnu/regexp/REException.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;
+
+import java.text.MessageFormat;
+
+/**
+ * This is the regular expression exception class.  An exception of this type
+ * defines the three attributes:
+ * <OL>
+ * <LI> A descriptive message of the error.
+ * <LI> An integral type code equivalent to one of the statically
+ *      defined symbols listed below.
+ * <LI> The approximate position in the input string where the error
+ *      occurred.
+ * </OL>
+ *
+ * @author <A HREF="mailto:wes@cacas.org">Wes Biggs</A>
+ */
+
+public class REException extends Exception {
+  private int type;
+  private int pos;
+
+  // Error conditions from GNU regcomp(3) manual
+
+  /**
+   * Error flag.
+   * Invalid use of repetition operators such  as  using
+   * `*' as the first character.
+   */
+  public static final int REG_BADRPT  =  1;
+
+  /**
+   * Error flag.
+   * Invalid use of back reference operator.
+   */
+  public static final int REG_BADBR   =  2;
+
+  /**
+   * Error flag.
+   * Un-matched brace interval operators.
+   */
+  public static final int REG_EBRACE  =  3;
+
+  /**
+   * Error flag.
+   * Un-matched bracket list operators.
+   */
+  public static final int REG_EBRACK  =  4;
+
+  /**
+   * Error flag.
+   * Invalid  use  of the range operator, eg. the ending
+   * point of the range occurs  prior  to  the  starting
+   * point.
+   */
+  public static final int REG_ERANGE  =  5;
+
+  /**
+   * Error flag.
+   * Unknown character class name. <B>Not implemented</B>.
+   */
+  public static final int REG_ECTYPE  =  6;
+
+  /**
+   * Error flag.
+   * Un-matched parenthesis group operators.
+   */
+  public static final int REG_EPAREN  =  7;
+
+  /**
+   * Error flag.
+   * Invalid back reference to a subexpression.
+   */
+  public static final int REG_ESUBREG =  8;
+
+  /**
+   * Error flag.
+   * Non specific error. <B>Not implemented</B>.
+   */
+  public static final int REG_EEND    =  9;
+
+  /**
+   * Error flag.
+   * Invalid escape sequence. <B>Not implemented</B>.
+   */
+  public static final int REG_ESCAPE  = 10;
+
+  /**
+   * Error flag.
+   * Invalid  use  of pattern operators such as group or list.
+   */
+  public static final int REG_BADPAT  = 11;
+
+  /**
+   * Error flag.
+   * Compiled  regular  expression  requires  a  pattern
+   * buffer larger than 64Kb. <B>Not implemented</B>.
+   */
+  public static final int REG_ESIZE   = 12;
+
+  /**
+   * Error flag.
+   * The regex routines ran out of memory. <B>Not implemented</B>.
+   */
+  public static final int REG_ESPACE  = 13;
+
+  REException(String msg, int type, int position) { 
+    super(msg); 
+    this.type = type;
+    this.pos = position;
+  }
+
+  /**
+   * Returns the type of the exception, one of the constants listed above.
+   */
+
+  public int getType() {
+    return type;
+  }
+
+  /**
+   * Returns the position, relative to the string or character array being
+   * compiled, where the error occurred.  This position is generally the point
+   * where the error was detected, not necessarily the starting index of
+   * a bad subexpression.
+   */
+  public int getPosition() {
+    return pos;
+  }
+
+  /**
+   * Reports the descriptive message associated with this exception
+   * as well as its index position in the string or character array
+   * being compiled.
+   */
+  public String getMessage() {
+    Object[] args = {new Integer(pos)};
+    StringBuffer sb = new StringBuffer();
+    String prefix = RE.getLocalizedMessage("error.prefix");
+    sb.append(MessageFormat.format(prefix, args));
+    sb.append('\n');
+    sb.append(super.getMessage());
+    return sb.toString();
+  }
+}