91 lines
3.3 KiB
C#
91 lines
3.3 KiB
C#
//-----------------------------------------------------------------------------
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//
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// Copyright (c) Microsoft. All rights reserved.
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// This code is licensed under the Microsoft Public License.
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// THIS CODE IS PROVIDED *AS IS* WITHOUT WARRANTY OF
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// ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING ANY
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// IMPLIED WARRANTIES OF FITNESS FOR A PARTICULAR
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// PURPOSE, MERCHANTABILITY, OR NON-INFRINGEMENT.
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//
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//-----------------------------------------------------------------------------
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using System;
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using System.IO;
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using System.Text;
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namespace Microsoft.Cci.Pdb {
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internal class PdbFileHeader {
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//internal PdbFileHeader(int pageSize) {
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// this.magic = new byte[32] {
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// 0x4D, 0x69, 0x63, 0x72, 0x6F, 0x73, 0x6F, 0x66, // "Microsof"
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// 0x74, 0x20, 0x43, 0x2F, 0x43, 0x2B, 0x2B, 0x20, // "t C/C++ "
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// 0x4D, 0x53, 0x46, 0x20, 0x37, 0x2E, 0x30, 0x30, // "MSF 7.00"
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// 0x0D, 0x0A, 0x1A, 0x44, 0x53, 0x00, 0x00, 0x00 // "^^^DS^^^"
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// };
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// this.pageSize = pageSize;
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//}
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internal PdbFileHeader(Stream reader, BitAccess bits) {
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bits.MinCapacity(56);
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reader.Seek(0, SeekOrigin.Begin);
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bits.FillBuffer(reader, 52);
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this.magic = new byte[32];
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bits.ReadBytes(this.magic); // 0..31
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bits.ReadInt32(out this.pageSize); // 32..35
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bits.ReadInt32(out this.freePageMap); // 36..39
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bits.ReadInt32(out this.pagesUsed); // 40..43
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bits.ReadInt32(out this.directorySize); // 44..47
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bits.ReadInt32(out this.zero); // 48..51
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int directoryPages = ((((directorySize + pageSize - 1) / pageSize) * 4) + pageSize - 1) / pageSize;
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this.directoryRoot = new int[directoryPages];
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bits.FillBuffer(reader, directoryPages * 4);
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bits.ReadInt32(this.directoryRoot);
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}
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//internal string Magic {
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// get { return StringFromBytesUTF8(magic); }
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//}
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//internal void Write(Stream writer, BitAccess bits) {
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// bits.MinCapacity(pageSize);
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// bits.WriteBytes(magic); // 0..31
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// bits.WriteInt32(pageSize); // 32..35
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// bits.WriteInt32(freePageMap); // 36..39
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// bits.WriteInt32(pagesUsed); // 40..43
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// bits.WriteInt32(directorySize); // 44..47
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// bits.WriteInt32(zero); // 48..51
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// bits.WriteInt32(directoryRoot); // 52..55
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// writer.Seek(0, SeekOrigin.Begin);
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// bits.WriteBuffer(writer, pageSize);
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//}
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//////////////////////////////////////////////////// Helper Functions.
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//
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//internal static string StringFromBytesUTF8(byte[] bytes) {
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// return StringFromBytesUTF8(bytes, 0, bytes.Length);
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//}
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//internal static string StringFromBytesUTF8(byte[] bytes, int offset, int length) {
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// for (int i = 0; i < length; i++) {
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// if (bytes[offset + i] < ' ') {
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// length = i;
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// }
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// }
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// return Encoding.UTF8.GetString(bytes, offset, length);
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//}
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////////////////////////////////////////////////////////////// Fields.
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//
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internal readonly byte[] magic;
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internal readonly int pageSize;
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internal int freePageMap;
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internal int pagesUsed;
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internal int directorySize;
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internal readonly int zero;
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internal int[] directoryRoot;
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}
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}
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