mcs/class/corlib/Mono.Globalization.Unicode/create-combining-class-source.cs

   1 //
   2 //
   3 // create-combining-class-source.cs
   4 //
   5 // Author:
   6 //      Atsushi Enomoto  <atsushi@ximian.com>
   7 //
   8 // Copyright 2005 Novell, Inc
   9 //
  10 // It creates combining class information table.
  11 //
  12
  13 using System;
  14 using System.Globalization;
  15 using System.IO;
  16
  17 using Util = Mono.Globalization.Unicode.NormalizationTableUtil;
  18
  19 namespace Mono.Globalization.Unicode
  20 {
  21         internal class CombiningClassCodeGenerator
  22         {
  23                 private int lineCount = 0;
  24
  25                 TextWriter CSCodeOut = TextWriter.Null;//Console.Out;
  26                 TextWriter CSTableOut = Console.Out;//TextWriter.Null;
  27
  28                 public static void Main ()
  29                 {
  30                         new CombiningClassCodeGenerator ().Run ();
  31                 }
  32
  33                 private void Run ()
  34                 {
  35                         try {
  36                                 Process ();
  37                         } catch (Exception ex) {
  38                                 throw new InvalidOperationException ("Internal error at line " + lineCount + " : " + ex);
  39                         }
  40                 }
  41
  42                 private void Process ()
  43                 {
  44                         CSCodeOut.WriteLine ("public static byte GetCombiningClass (int c)");
  45                         CSCodeOut.WriteLine ("{");
  46                         CSCodeOut.WriteLine ("  switch (c) {");
  47
  48                         TextReader reader = Console.In;
  49                         while (reader.Peek () != -1) {
  50                                 string line = reader.ReadLine ();
  51                                 lineCount++;
  52                                 int idx = line.IndexOf ('#');
  53                                 if (idx >= 0)
  54                                         line = line.Substring (0, idx).Trim ();
  55                                 if (line.Length == 0)
  56                                         continue;
  57                                 int n = 0;
  58                                 while (Char.IsDigit (line [n]) || Char.IsLetter (line [n]))
  59                                         n++;
  60                                 int cp = int.Parse (line.Substring (0, n), NumberStyles.HexNumber);
  61
  62                                 int cpEnd = -1;
  63                                 if (line [n] == '.' && line [n + 1] == '.')
  64                                         cpEnd = int.Parse (line.Substring (n + 2, n), NumberStyles.HexNumber);
  65                                 int nameStart = line.IndexOf (';') + 1;
  66                                 int valueStart = line.IndexOf (';', nameStart) + 1;
  67                                 string val = valueStart == 0 ? line.Substring (nameStart) :
  68                                         line.Substring (nameStart, valueStart - nameStart - 1);
  69                                 SetProp (cp, cpEnd, short.Parse (val));
  70                         }
  71
  72                         CSCodeOut.WriteLine ("          return {0};", prevVal);
  73                         CSCodeOut.WriteLine ("  default:");
  74                         CSCodeOut.WriteLine ("          return 0;");
  75                         CSCodeOut.WriteLine ("  }");
  76                         CSCodeOut.WriteLine ("}");
  77
  78                         reader.Close ();
  79
  80                         byte [] ret = CodePointIndexer.CompressArray (
  81                                 values, typeof (byte), Util.Combining) as byte [];
  82
  83                         CSTableOut.WriteLine ("public static byte [] combiningClass = new byte [] {");
  84                         for (int i = 0; i < ret.Length; i++) {
  85                                 byte value = ret [i];
  86                                 if (value < 10)
  87                                         CSTableOut.Write ("{0},", value);
  88                                 else
  89                                         CSTableOut.Write ("0x{0:X02},", value);
  90                                 if (i % 16 == 15)
  91                                         CSTableOut.WriteLine (" // {0:X04}", Util.Combining.ToCodePoint (i - 15));
  92                         }
  93                         CSTableOut.WriteLine ("};");
  94                 }
  95
  96                 private short prevVal;
  97
  98                 byte [] values = new byte [0x20000];
  99
 100                 private void SetProp (int cp, int cpEnd, short val)
 101                 {
 102                         if (val == 0)
 103                                 return;
 104
 105                         if (prevVal != val && prevVal != 0)
 106                                 CSCodeOut.WriteLine ("\t\treturn {0};", prevVal);
 107                         prevVal = val;
 108
 109                         if (cpEnd < 0) {
 110                                 CSCodeOut.WriteLine ("\tcase 0x{0:X}:", cp);
 111                                 values [cp] = (byte) val;
 112                         }
 113                         else
 114                                 for (int i = cp; i <= cpEnd; i++) {
 115                                         CSCodeOut.WriteLine ("\tcase 0x{0:X}:", i);
 116                                         values [i] = (byte) val;
 117                                 }
 118                 }
 119         }
 120 }
 121