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source: branches/CodeEditor/HeuristicLab.ExtLibs/HeuristicLab.Cecil/0.9.5/Mono.Cecil-0.9.5/Symbols/Mono.Cecil.Pdb/Microsoft.Cci.Pdb/PdbFileHeader.cs @ 11700

Last change on this file since 11700 was 11700, checked in by jkarder, 9 years ago

#2077: created branch and added first version

File size: 2.8 KB
Line 
1//-----------------------------------------------------------------------------
2//
3// Copyright (C) Microsoft Corporation.  All Rights Reserved.
4//
5//-----------------------------------------------------------------------------
6using System;
7using System.IO;
8using System.Text;
9
10namespace Microsoft.Cci.Pdb {
11  internal class PdbFileHeader {
12    internal PdbFileHeader(int pageSize) {
13      this.magic = new byte[32] {
14                0x4D, 0x69, 0x63, 0x72, 0x6F, 0x73, 0x6F, 0x66, // "Microsof"
15                0x74, 0x20, 0x43, 0x2F, 0x43, 0x2B, 0x2B, 0x20, // "t C/C++ "
16                0x4D, 0x53, 0x46, 0x20, 0x37, 0x2E, 0x30, 0x30, // "MSF 7.00"
17                0x0D, 0x0A, 0x1A, 0x44, 0x53, 0x00, 0x00, 0x00  // "^^^DS^^^"
18            };
19      this.pageSize = pageSize;
20      this.zero = 0;
21    }
22
23    internal PdbFileHeader(Stream reader, BitAccess bits) {
24      bits.MinCapacity(56);
25      reader.Seek(0, SeekOrigin.Begin);
26      bits.FillBuffer(reader, 56);
27
28      this.magic = new byte[32];
29      bits.ReadBytes(this.magic);                 //   0..31
30      bits.ReadInt32(out this.pageSize);          //  32..35
31      bits.ReadInt32(out this.freePageMap);       //  36..39
32      bits.ReadInt32(out this.pagesUsed);         //  40..43
33      bits.ReadInt32(out this.directorySize);     //  44..47
34      bits.ReadInt32(out this.zero);              //  48..51
35      bits.ReadInt32(out this.directoryRoot);     //  52..55
36    }
37
38    internal string Magic {
39      get { return StringFromBytesUTF8(magic); }
40    }
41
42    internal void Write(Stream writer, BitAccess bits) {
43      bits.MinCapacity(56);
44      bits.WriteBytes(magic);                     //   0..31
45      bits.WriteInt32(pageSize);                  //  32..35
46      bits.WriteInt32(freePageMap);               //  36..39
47      bits.WriteInt32(pagesUsed);                 //  40..43
48      bits.WriteInt32(directorySize);             //  44..47
49      bits.WriteInt32(zero);                      //  48..51
50      bits.WriteInt32(directoryRoot);             //  52..55
51
52      writer.Seek(0, SeekOrigin.Begin);
53      bits.WriteBuffer(writer, 56);
54    }
55
56    //////////////////////////////////////////////////// Helper Functions.
57    //
58    internal string StringFromBytesUTF8(byte[] bytes) {
59      return StringFromBytesUTF8(bytes, 0, bytes.Length);
60    }
61
62    internal string StringFromBytesUTF8(byte[] bytes, int offset, int length) {
63      for (int i = 0; i < length; i++) {
64        if (bytes[offset + i] < ' ') {
65          length = i;
66        }
67      }
68      return Encoding.UTF8.GetString(bytes, offset, length);
69    }
70
71    ////////////////////////////////////////////////////////////// Fields.
72    //
73    internal readonly byte[] magic;
74    internal readonly int pageSize;
75    internal int freePageMap;
76    internal int pagesUsed;
77    internal int directorySize;
78    internal readonly int zero;
79    internal int directoryRoot;
80  }
81
82}
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