summaryrefslogtreecommitdiffstats
path: root/src/org/jetbrains/java/decompiler/util/InterpreterUtil.java
blob: 89e11c0cb1d10404a5ca2cb2b02f21e94e286d84 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/*
 * Copyright 2000-2014 JetBrains s.r.o.
 *
 * 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 org.jetbrains.java.decompiler.util;

import org.jetbrains.java.decompiler.main.DecompilerContext;
import org.jetbrains.java.decompiler.main.extern.IFernflowerPreferences;

import java.io.*;
import java.nio.channels.FileChannel;
import java.util.Collection;
import java.util.HashSet;
import java.util.List;

public class InterpreterUtil {

  public static void copyFile(File in, File out) throws IOException {
    FileInputStream inStream = new FileInputStream(in);
    try {
      FileOutputStream outStream = new FileOutputStream(out);
      try {
        FileChannel inChannel = inStream.getChannel();
        FileChannel outChannel = outStream.getChannel();
        // magic number for Windows, 64Mb - 32Kb)
        int maxCount = (64 * 1024 * 1024) - (32 * 1024);
        long size = inChannel.size();
        long position = 0;
        while (position < size) {
          position += inChannel.transferTo(position, maxCount, outChannel);
        }
      }
      finally {
        outStream.close();
      }
    }
    finally {
      inStream.close();
    }
  }

  public static void copyInputStream(InputStream in, OutputStream out) throws IOException {

    byte[] buffer = new byte[1024];
    int len;

    while ((len = in.read(buffer)) >= 0) {
      out.write(buffer, 0, len);
    }
  }

  public static String getIndentString(int length) {
    String indent = (String)DecompilerContext.getProperty(IFernflowerPreferences.INDENT_STRING);
    StringBuilder buf = new StringBuilder();
    while (length-- > 0) {
      buf.append(indent);
    }
    return buf.toString();
  }


  public static boolean equalSets(Collection<?> c1, Collection<?> c2) {

    if (c1 == null) {
      return c2 == null;
    }
    else if (c2 == null) {
      return false;
    }

    if (c1.size() != c2.size()) {
      return false;
    }

    HashSet<Object> set = new HashSet<Object>(c1);
    set.removeAll(c2);
    return (set.size() == 0);
  }

  public static boolean equalObjects(Object first, Object second) {
    return first == null ? second == null : first.equals(second);
  }

  public static boolean equalObjectArrays(Object[] first, Object[] second) {

    if (first == null || second == null) {
      return equalObjects(first, second);
    }
    else {
      if (first.length != second.length) {
        return false;
      }

      for (int i = 0; i < first.length; i++) {
        if (!equalObjects(first[i], second[i])) {
          return false;
        }
      }
    }

    return true;
  }

  public static boolean equalLists(List<?> first, List<?> second) {

    if (first == null) {
      return second == null;
    }
    else if (second == null) {
      return first == null;
    }

    if (first.size() == second.size()) {
      for (int i = 0; i < first.size(); i++) {
        if (!equalObjects(first.get(i), second.get(i))) {
          return false;
        }
      }
      return true;
    }

    return false;
  }

  public static boolean isPrintableUnicode(char c) {
    int t = Character.getType(c);
    return t != Character.UNASSIGNED && t != Character.LINE_SEPARATOR && t != Character.PARAGRAPH_SEPARATOR &&
           t != Character.CONTROL && t != Character.FORMAT && t != Character.PRIVATE_USE && t != Character.SURROGATE;
  }

  public static String charToUnicodeLiteral(int value) {
    String sTemp = Integer.toHexString(value);
    sTemp = ("0000" + sTemp).substring(sTemp.length());
    return "\\u" + sTemp;
  }

  public static String makeUniqueKey(String name, String descriptor) {
    return name + " " + descriptor;
  }
}