/// <summary>
/// </summary>
/// <param name="reader">
/// </param>
/// <param name="head">
/// </param>
/// <param name="bits">
/// </param>
internal MsfDirectory(PdbReader reader, PdbFileHeader head, BitAccess bits)
{
bits.MinCapacity(head.directorySize);
var pages = reader.PagesFromSize(head.directorySize);
// 0..n in page of directory pages.
reader.Seek(head.directoryRoot, 0);
bits.FillBuffer(reader.reader, pages * 4);
var stream = new DataStream(head.directorySize, bits, pages);
bits.MinCapacity(head.directorySize);
stream.Read(reader, bits);
// 0..3 in directory pages
int count;
bits.ReadInt32(out count);
// 4..n
var sizes = new int[count];
bits.ReadInt32(sizes);
// n..m
this.streams = new DataStream[count];
for (var i = 0; i < count; i++)
{
if (sizes[i] <= 0)
{
this.streams[i] = new DataStream();
}
else
{
this.streams[i] = new DataStream(sizes[i], bits, reader.PagesFromSize(sizes[i]));
}
}
}
/// <summary>
/// </summary>
/// <param name="reader">
/// </param>
/// <param name="head">
/// </param>
/// <param name="bits">
/// </param>
internal MsfDirectory(PdbReader reader, PdbFileHeader head, BitAccess bits)
{
bits.MinCapacity(head.directorySize);
var pages = reader.PagesFromSize(head.directorySize);
// 0..n in page of directory pages.
reader.Seek(head.directoryRoot, 0);
bits.FillBuffer(reader.reader, pages * 4);
var stream = new DataStream(head.directorySize, bits, pages);
bits.MinCapacity(head.directorySize);
stream.Read(reader, bits);
// 0..3 in directory pages
int count;
bits.ReadInt32(out count);
// 4..n
var sizes = new int[count];
bits.ReadInt32(sizes);
// n..m
this.streams = new DataStream[count];
for (var i = 0; i < count; i++)
{
if (sizes[i] <= 0)
{
this.streams[i] = new DataStream();
}
else
{
this.streams[i] = new DataStream(sizes[i], bits, reader.PagesFromSize(sizes[i]));
}
}
}
internal PdbFileHeader(Stream reader, BitAccess bits)
{
bits.MinCapacity(56);
reader.Seek(0, SeekOrigin.Begin);
bits.FillBuffer(reader, 52);
this.magic = new byte[32];
bits.ReadBytes(this.magic); // 0..31
bits.ReadInt32(out this.pageSize); // 32..35
bits.ReadInt32(out this.freePageMap); // 36..39
bits.ReadInt32(out this.pagesUsed); // 40..43
bits.ReadInt32(out this.directorySize); // 44..47
bits.ReadInt32(out this.zero); // 48..51
int directoryPages = ((((directorySize + pageSize - 1) / pageSize) * 4) + pageSize - 1) / pageSize;
this.directoryRoot = new int[directoryPages];
bits.FillBuffer(reader, directoryPages * 4);
bits.ReadInt32(this.directoryRoot);
}