mcs/tools/pdb2mdb/MsfDirectory.cs

   1 //-----------------------------------------------------------------------------
   2 //
   3 // Copyright (C) Microsoft Corporation.  All Rights Reserved.
   4 //
   5 //-----------------------------------------------------------------------------
   6 using System;
   7
   8 namespace Microsoft.Cci.Pdb {
   9   internal class MsfDirectory {
  10     internal MsfDirectory(PdbReader reader, PdbFileHeader head, BitAccess bits) {
  11       bits.MinCapacity(head.directorySize);
  12       int pages = reader.PagesFromSize(head.directorySize);
  13
  14       // 0..n in page of directory pages.
  15       reader.Seek(head.directoryRoot, 0);
  16       bits.FillBuffer(reader.reader, pages * 4);
  17
  18       DataStream stream = new DataStream(head.directorySize, bits, pages);
  19       bits.MinCapacity(head.directorySize);
  20       stream.Read(reader, bits);
  21
  22       // 0..3 in directory pages
  23       int count;
  24       bits.ReadInt32(out count);
  25
  26       // 4..n
  27       int[] sizes = new int[count];
  28       bits.ReadInt32(sizes);
  29
  30       // n..m
  31       streams = new DataStream[count];
  32       for (int i = 0; i < count; i++) {
  33         if (sizes[i] <= 0) {
  34           streams[i] = new DataStream();
  35         } else {
  36           streams[i] = new DataStream(sizes[i], bits,
  37                                       reader.PagesFromSize(sizes[i]));
  38         }
  39       }
  40     }
  41
  42     internal DataStream[] streams;
  43   }
  44
  45 }