bundles/org.simantics.databoard/testcases/org/simantics/databoard/tests/StringTest.java

   1 /*******************************************************************************
   2  *  Copyright (c) 2010 Association for Decentralized Information Management in
   3  *  Industry THTH ry.
   4  *  All rights reserved. This program and the accompanying materials
   5  *  are made available under the terms of the Eclipse Public License v1.0
   6  *  which accompanies this distribution, and is available at
   7  *  http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  *  Contributors:
  10  *      VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.databoard.tests;
  13
  14 import java.nio.charset.Charset;
  15 import java.util.Random;
  16
  17 public class StringTest {
  18
  19         static final Charset UTF8 = Charset.forName("utf-8");
  20         static final Random r = new Random();
  21
  22         static public String getRandomString()
  23         {
  24                 int len = r.nextInt(600);
  25                 StringBuilder sb = new StringBuilder(len);
  26                 for (int i=0; i<len; i++)
  27                 {
  28                         char c = (char) r.nextInt();
  29                         sb.append(c);
  30                 }
  31                 return sb.toString();
  32         }
  33
  34         static public String getStringWithC(char c )
  35         {
  36                 int len = 3;
  37                 StringBuilder sb = new StringBuilder(len);
  38                 for (int i=0; i<len; i++)
  39                 {
  40                         sb.append(c);
  41                 }
  42                 return sb.toString();
  43         }
  44
  45
  46         public static int getStringUTF8EncodedByteLength1(String string)
  47         {
  48                 return string.getBytes(UTF8).length;
  49         }
  50
  51         public static int getStringUTF8EncodedByteLength2(String string)
  52         {
  53                 int result = 0;
  54                 int length = string.length();
  55                 for (int i=0; i<length; i++)
  56                 {
  57                         char c = string.charAt(i);
  58                         if (c>=0 && c<=0x7f) {
  59                                 result += 1;
  60                         } else if (c>=0x80 && c<=0x07ff) {
  61                                 result += 2;
  62                         } else if (c>=0xD800 && c<=0xDFFF) {
  63                                 result += 1;
  64                         } else if (c>=0x800 && c<=0xffff) {
  65                                 result += 3;
  66                         } else if (c>=0x10000 && c<=0x10ffff) {
  67                                 result += 4;
  68                         } else if (c>=0x110000 && c<=0x1FFFFF) {
  69                                 result += 4;
  70                         } else {
  71                                 // NOT IN RFC 3629
  72                                 // Lets guess 5 bytes anyhow
  73                                 result += 4;
  74                         }
  75                 }
  76                 return result;
  77         }
  78
  79
  80         public static void main(String[] args) {
  81                 char c = (char) 0x66778899;
  82                 int j = (int) c;
  83                 System.out.println(j );
  84
  85                 for (int i=1000000; i<0x7fffffff; i++)
  86                 {
  87                         String str = getStringWithC((char)i);
  88                         int len1 = getStringUTF8EncodedByteLength1(str);
  89                         int len2 = getStringUTF8EncodedByteLength2(str);
  90                         if (len1!=len2) {
  91                                 System.out.printf("i=%d, Correct=%d, My=%d, Chars=%d, %s\n", i, len1, len2, str.length(), str);
  92                                 throw new RuntimeException("length mismatch");
  93                         }
  94                         if ((i & 0xFFFF) == 0)
  95                                 System.out.printf("i=%d, Correct=%d, My=%d, Chars=%d, %s\n", i, len1, len2, str.length(), str);
  96
  97                 }
  98         }
  99
 100 }
 101