content: /*
   *  This file is part of AndroidIDE.
   *
   *  AndroidIDE 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 3 of the License, or
   *  (at your option) any later version.
   *
   *  AndroidIDE 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 AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
   */
  
  /*
   * reserved comment block
   * DO NOT REMOVE OR ALTER!
   */
  /*
   * Copyright 1999-2004 The Apache Software Foundation.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package jaxp.sun.org.apache.regexp.internal;
  
  /**
   * 'recompile' is a command line tool that pre-compiles one or more regular expressions
   * for use with the regular expression matcher class 'RE'.  For example, the command
   * "java recompile a*b" produces output like this:
   *
   * <pre>
   *
   *    // Pre-compiled regular expression "a*b"
   *    char[] re1Instructions =
   *    {
   *        0x007c, 0x0000, 0x001a, 0x007c, 0x0000, 0x000d, 0x0041,
   *        0x0001, 0x0004, 0x0061, 0x007c, 0x0000, 0x0003, 0x0047,
   *        0x0000, 0xfff6, 0x007c, 0x0000, 0x0003, 0x004e, 0x0000,
   *        0x0003, 0x0041, 0x0001, 0x0004, 0x0062, 0x0045, 0x0000,
   *        0x0000,
   *    };
   *
   *    REProgram re1 = new REProgram(re1Instructions);
   *
   * </pre>
   *
   * By pasting this output into your code, you can construct a regular expression matcher
   * (RE) object directly from the pre-compiled data (the character array re1), thus avoiding
   * the overhead of compiling the expression at runtime.  For example:
   *
   * <pre>
   *
   *    RE r = new RE(re1);
   *
   * </pre>
   *
   * @see RE
   * @see RECompiler
   *
   * @author <a href="mailto:jonl@muppetlabs.com">Jonathan Locke</a>
   */
  public class recompile
  {
      /**
       * Main application entrypoint.
       * @param arg Command line arguments
       */
      static public void main(String[] arg)
      {
          // Create a compiler object
          RECompiler r = new RECompiler();
  
          // Print usage if arguments are incorrect
          if (arg.length <= 0 || arg.length % 2 != 0)
          {
              System.out.println("Usage: recompile <patternname> <pattern>");
              System.exit(0);
          }
  
          // Loop through arguments, compiling each
          for (int i = 0; i < arg.length; i += 2)
          {
              try
              {
                  // Compile regular expression
                  String name         = arg[i];
                  String pattern      = arg[i+1];
                  String instructions = name + "PatternInstructions";
  
                  // Output program as a nice, formatted character array
                  System.out.print("\n    // Pre-compiled regular expression '" + pattern + "'\n"
                                   + "    private static char[] " + instructions + " = \n    {");
  
                  // Compile program for pattern
                  REProgram program = r.compile(pattern);
  
                  // Number of columns in output
                  int numColumns = 7;
  
                  // Loop through program
                  char[] p = program.getInstructions();
                  for (int j = 0; j < p.length; j++)
                  {
                      // End of column?
                      if ((j % numColumns) == 0)
                      {
                          System.out.print("\n        ");
                      }
  
                      // Print character as padded hex number
                      String hex = Integer.toHexString(p[j]);
                      while (hex.length() < 4)
                      {
                          hex = "0" + hex;
                      }
                      System.out.print("0x" + hex + ", ");
                  }
  
                  // End of program block
                  System.out.println("\n    };");
                  System.out.println("\n    private static RE " + name + "Pattern = new RE(new REProgram(" + instructions + "));");
              }
              catch (RESyntaxException e)
              {
                  System.out.println("Syntax error in expression \"" + arg[i] + "\": " + e.toString());
              }
              catch (Exception e)
              {
                  System.out.println("Unexpected exception: " + e.toString());
              }
              catch (Error e)
              {
                  System.out.println("Internal error: " + e.toString());
              }
          }
      }
  }
  