ICU-4337 Generate mirrored character data from Unicode data.

X-SVN-Rev: 18304

icu4j/src/com/ibm/icu/dev/tool/layout/BuildMirroringTables.java

@@ -0,0 +1,97 @@
+/*
+ *******************************************************************************
+ * Copyright (C) 1996-2005, International Business Machines Corporation and    *
+ * others. All Rights Reserved.                                                *
+ *******************************************************************************
+ *
+ */
+
+package com.ibm.icu.dev.tool.layout;
+
+import com.ibm.icu.impl.Utility;
+import com.ibm.icu.lang.UCharacter;
+import com.ibm.icu.text.UnicodeSet;
+
+/**
+ * @author emader
+ *
+ * TODO To change the template for this generated type comment go to
+ * Window - Preferences - Java - Code Style - Code Templates
+ */
+public class BuildMirroringTables extends ModuleWriter
+{
+    public BuildMirroringTables()
+    {
+        super();
+    }
+    
+    public void dump(String name, int[] array, int length, int valuesPerLine)
+    {
+        StringBuffer line = new StringBuffer("    ");
+        
+        output.println("const LEUnicode32 DefaultCharMapper::" + name + "[] = {");
+        
+        for (int i = 0; i < length; i += 1) {
+            
+            if (i > 0 && i % valuesPerLine == 0) {
+                output.println(line.toString());
+                line.setLength(4);
+            }
+    
+            line.append("0x" + Utility.hex(array[i], 4));
+            line.append(", ");
+        }
+    
+        line.setLength(line.length() - 2);
+    
+        output.println(line.toString());
+        output.println("};\n");
+    }
+    
+    public void writeMirroredDataFile(String filename)
+    {
+        UnicodeSet mirrored = new UnicodeSet("[\\p{Bidi_Mirrored}]");
+        int count = mirrored.size();
+        int[] chars   = new int[count];
+        int[] mirrors = new int[count];
+        int total = 0;
+        
+        System.out.println("There are " + count + " mirrored characters.");
+        
+        for(int i = 0; i < count; i += 1) {
+            int ch = mirrored.charAt(i);
+            int m  = UCharacter.getMirror(ch);
+            
+            if (ch != m) {
+                chars[total] = ch & 0xFFFF;
+                mirrors[total++] = m & 0xFFFF;
+            }
+        }
+        
+        System.out.println("There are " + total + " characters with a different mirror.\n");
+        
+        openFile(filename);
+        writeHeader(null, includeFiles);
+        
+        
+        dump("mirroredChars", chars, total, 8);
+        
+        System.out.println();
+        
+        dump("srahCderorrim", mirrors, total, 8);
+        
+        output.println("const le_int32 DefaultCharMapper::mirroredCharsCount = " + total + ";\n");
+
+        writeTrailer();
+        closeFile();
+    }
+    
+    private static String includeFiles[] = {"LETypes.h", "DefaultCharMapper.h"};
+    
+    public static void main(String[] args)
+    {
+        BuildMirroringTables bmt = new BuildMirroringTables();
+        
+        bmt.writeMirroredDataFile("MirroredCharData.cpp");
+    }
+}