/// <summary>
/// Creates a new <see cref="MethodHeaderSection"/> with the
/// <paramref name="flags"/> provided.
/// </summary>
/// <param name="flags">The <see cref="MethodHeaderSectionFlags"/>
/// which determine information about the <see cref="MethodHeaderSection"/>.</param>
internal CliMetadataMethodHeaderSection(MethodHeaderSectionFlags flags)
{
this.flags = flags;
}
private void ReadWide(EndianAwareBinaryReader reader, ICliMetadataRoot metadataRoot, Action <byte[]> bodyBuilder)
{
var flagsAndSize = reader.ReadUInt16();
this.flags = ((MethodHeaderFlags)(flagsAndSize & 0x0FFF)) & ~MethodHeaderFlags.WideFormat;
this.headerSize = (byte)((flagsAndSize & 0xF000) >> 0xA);
this.maxStack = reader.ReadUInt16();
this.codeSize = reader.ReadUInt32();
var localVarSigToken = reader.ReadUInt32();
if (localVarSigToken != 0)
{
var sigTableKind = (CliMetadataTableKinds)(1UL << (int)((localVarSigToken & 0xFF000000) >> 24));
var sigIndex = localVarSigToken & 0x00FFFFFF;
ICliMetadataTable table;
if (metadataRoot.TableStream.TryGetValue(sigTableKind, out table))
{
if (table is ICliMetadataStandAloneSigTable)
{
ICliMetadataStandAloneSigTable sigTable = (ICliMetadataStandAloneSigTable)table;
var entry = sigTable[(int)sigIndex];
if (entry.Signature is ICliMetadataLocalVarSignature)
{
var sigEntry = (ICliMetadataLocalVarSignature)entry.Signature;
this.locals = sigEntry;
}
}
}
long codePosition = reader.BaseStream.Position;
bodyBuilder(reader.ReadBytes((int)this.codeSize));
if ((reader.BaseStream.Position % 4) != 0)
{
reader.BaseStream.Position += 4 - reader.BaseStream.Position % 4;
}
var ehTable = new byte[0];
if ((flags & MethodHeaderFlags.ContainsMoreSections) == MethodHeaderFlags.ContainsMoreSections)
{
readSection:
MethodHeaderSectionFlags sectionFlags = (MethodHeaderSectionFlags)reader.ReadByte();
var smallFormat = ((sectionFlags & MethodHeaderSectionFlags.FatFormat) != MethodHeaderSectionFlags.FatFormat);
int dataSize = 0;
if (smallFormat)
{
dataSize = reader.ReadByte();
reader.ReadUInt16();
}
else
{
dataSize = (int)new BitVector(new byte[] { reader.ReadByte(), reader.ReadByte(), reader.ReadByte() }).GetUInt32Nibbits(0, 24);
}
if ((sectionFlags & MethodHeaderSectionFlags.ExceptionHandlerTable) == MethodHeaderSectionFlags.ExceptionHandlerTable)
{
ehTable = ehTable.AddInlineArray(reader.ReadBytes(dataSize - 4));
}
else
{
reader.BaseStream.Position += dataSize - 4;
}
if ((sectionFlags & MethodHeaderSectionFlags.ContainsMoreSections) == MethodHeaderSectionFlags.ContainsMoreSections)
{
goto readSection;
}
}
if (ehTable.Length > 0)
{
this.exceptionTable = new CliMetadataMethodExceptionTable(ehTable);
}
reader.BaseStream.Position = codePosition;
}
}
