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      1 /**
      2  * Copyright 2007 Google Inc.
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.tonicsystems.jarjar;
     18 
     19 import com.tonicsystems.jarjar.util.*;
     20 import java.io.*;
     21 import org.objectweb.asm.*;
     22 
     23 class StringDumper
     24 {
     25     public StringDumper() {
     26     }
     27 
     28     public void run(String classPath, PrintWriter pw) throws IOException {
     29         StringReader stringReader = new DumpStringReader(pw);
     30         ClassPathIterator cp = new ClassPathIterator(classPath);
     31         try {
     32             while (cp.hasNext()) {
     33                 ClassPathEntry entry = cp.next();
     34                 InputStream in = entry.openStream();
     35                 try {
     36                     new ClassReader(in).accept(stringReader, 0);
     37                 } catch (Exception e) {
     38                     System.err.println("Error reading " + entry.getName() + ": " + e.getMessage());
     39                 } finally {
     40                     in.close();
     41                 }
     42                 pw.flush();
     43             }
     44         } catch (RuntimeIOException e) {
     45             throw (IOException)e.getCause();
     46         } finally {
     47           cp.close();
     48         }
     49     }
     50 
     51     private static class DumpStringReader extends StringReader
     52     {
     53         private final PrintWriter pw;
     54         private String className;
     55 
     56         public DumpStringReader(PrintWriter pw) {
     57             this.pw = pw;
     58         }
     59 
     60         public void visitString(String className, String value, int line) {
     61             if (value.length() > 0) {
     62                 if (!className.equals(this.className)) {
     63                     this.className = className;
     64                     pw.println(className.replace('/', '.'));
     65                 }
     66                 pw.print("\t");
     67                 if (line >= 0)
     68                     pw.print(line + ": ");
     69                 pw.print(escapeStringLiteral(value));
     70                 pw.println();
     71             }
     72         }
     73     };
     74 
     75     private static String escapeStringLiteral(String value) {
     76         StringBuilder sb = new StringBuilder();
     77         sb.append("\"");
     78         char[] chars = value.toCharArray();
     79         for (int i = 0, size = chars.length; i < size; i++) {
     80             char ch = chars[i];
     81             switch (ch) {
     82             case '\n': sb.append("\\n"); break;
     83             case '\r': sb.append("\\r"); break;
     84             case '\b': sb.append("\\b"); break;
     85             case '\f': sb.append("\\f"); break;
     86             case '\t': sb.append("\\t"); break;
     87             case '\"': sb.append("\\\""); break;
     88             case '\\': sb.append("\\\\"); break;
     89             default:
     90                 sb.append(ch);
     91             }
     92         }
     93         sb.append("\"");
     94         return sb.toString();
     95     }
     96 }
     97