1.1 --- a/src/com/sun/org/apache/regexp/internal/recompile.java Sat Oct 24 16:18:47 2020 +0800
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,137 +0,0 @@
1.4 -/*
1.5 - * reserved comment block
1.6 - * DO NOT REMOVE OR ALTER!
1.7 - */
1.8 -/*
1.9 - * Copyright 1999-2004 The Apache Software Foundation.
1.10 - *
1.11 - * Licensed under the Apache License, Version 2.0 (the "License");
1.12 - * you may not use this file except in compliance with the License.
1.13 - * You may obtain a copy of the License at
1.14 - *
1.15 - * http://www.apache.org/licenses/LICENSE-2.0
1.16 - *
1.17 - * Unless required by applicable law or agreed to in writing, software
1.18 - * distributed under the License is distributed on an "AS IS" BASIS,
1.19 - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.20 - * See the License for the specific language governing permissions and
1.21 - * limitations under the License.
1.22 - */
1.23 -
1.24 -package com.sun.org.apache.regexp.internal;
1.25 -
1.26 -import com.sun.org.apache.regexp.internal.RECompiler;
1.27 -import com.sun.org.apache.regexp.internal.RESyntaxException;
1.28 -
1.29 -/**
1.30 - * 'recompile' is a command line tool that pre-compiles one or more regular expressions
1.31 - * for use with the regular expression matcher class 'RE'. For example, the command
1.32 - * "java recompile a*b" produces output like this:
1.33 - *
1.34 - * <pre>
1.35 - *
1.36 - * // Pre-compiled regular expression "a*b"
1.37 - * char[] re1Instructions =
1.38 - * {
1.39 - * 0x007c, 0x0000, 0x001a, 0x007c, 0x0000, 0x000d, 0x0041,
1.40 - * 0x0001, 0x0004, 0x0061, 0x007c, 0x0000, 0x0003, 0x0047,
1.41 - * 0x0000, 0xfff6, 0x007c, 0x0000, 0x0003, 0x004e, 0x0000,
1.42 - * 0x0003, 0x0041, 0x0001, 0x0004, 0x0062, 0x0045, 0x0000,
1.43 - * 0x0000,
1.44 - * };
1.45 - *
1.46 - * REProgram re1 = new REProgram(re1Instructions);
1.47 - *
1.48 - * </pre>
1.49 - *
1.50 - * By pasting this output into your code, you can construct a regular expression matcher
1.51 - * (RE) object directly from the pre-compiled data (the character array re1), thus avoiding
1.52 - * the overhead of compiling the expression at runtime. For example:
1.53 - *
1.54 - * <pre>
1.55 - *
1.56 - * RE r = new RE(re1);
1.57 - *
1.58 - * </pre>
1.59 - *
1.60 - * @see RE
1.61 - * @see RECompiler
1.62 - *
1.63 - * @author <a href="mailto:jonl@muppetlabs.com">Jonathan Locke</a>
1.64 - */
1.65 -public class recompile
1.66 -{
1.67 - /**
1.68 - * Main application entrypoint.
1.69 - * @param arg Command line arguments
1.70 - */
1.71 - static public void main(String[] arg)
1.72 - {
1.73 - // Create a compiler object
1.74 - RECompiler r = new RECompiler();
1.75 -
1.76 - // Print usage if arguments are incorrect
1.77 - if (arg.length <= 0 || arg.length % 2 != 0)
1.78 - {
1.79 - System.out.println("Usage: recompile <patternname> <pattern>");
1.80 - System.exit(0);
1.81 - }
1.82 -
1.83 - // Loop through arguments, compiling each
1.84 - for (int i = 0; i < arg.length; i += 2)
1.85 - {
1.86 - try
1.87 - {
1.88 - // Compile regular expression
1.89 - String name = arg[i];
1.90 - String pattern = arg[i+1];
1.91 - String instructions = name + "PatternInstructions";
1.92 -
1.93 - // Output program as a nice, formatted character array
1.94 - System.out.print("\n // Pre-compiled regular expression '" + pattern + "'\n"
1.95 - + " private static char[] " + instructions + " = \n {");
1.96 -
1.97 - // Compile program for pattern
1.98 - REProgram program = r.compile(pattern);
1.99 -
1.100 - // Number of columns in output
1.101 - int numColumns = 7;
1.102 -
1.103 - // Loop through program
1.104 - char[] p = program.getInstructions();
1.105 - for (int j = 0; j < p.length; j++)
1.106 - {
1.107 - // End of column?
1.108 - if ((j % numColumns) == 0)
1.109 - {
1.110 - System.out.print("\n ");
1.111 - }
1.112 -
1.113 - // Print character as padded hex number
1.114 - String hex = Integer.toHexString(p[j]);
1.115 - while (hex.length() < 4)
1.116 - {
1.117 - hex = "0" + hex;
1.118 - }
1.119 - System.out.print("0x" + hex + ", ");
1.120 - }
1.121 -
1.122 - // End of program block
1.123 - System.out.println("\n };");
1.124 - System.out.println("\n private static RE " + name + "Pattern = new RE(new REProgram(" + instructions + "));");
1.125 - }
1.126 - catch (RESyntaxException e)
1.127 - {
1.128 - System.out.println("Syntax error in expression \"" + arg[i] + "\": " + e.toString());
1.129 - }
1.130 - catch (Exception e)
1.131 - {
1.132 - System.out.println("Unexpected exception: " + e.toString());
1.133 - }
1.134 - catch (Error e)
1.135 - {
1.136 - System.out.println("Internal error: " + e.toString());
1.137 - }
1.138 - }
1.139 - }
1.140 -}
