internal static MetadataHeader FromReadingContext(ReadingContext context)
{
var reader = context.Reader;
var header = new MetadataHeader
{
StartOffset = reader.Position,
Signature = reader.ReadUInt32(),
MajorVersion = reader.ReadUInt16(),
MinorVersion = reader.ReadUInt16(),
Reserved = reader.ReadUInt32(),
VersionLength = reader.ReadUInt32(),
};
header.VersionString = Encoding.ASCII.GetString(reader.ReadBytes((int)header.VersionLength));
header.Flags = reader.ReadUInt16();
var streamCount = reader.ReadUInt16();
for (int i = 0; i < streamCount; i++)
{
var streamHeader = MetadataStreamHeader.FromReadingContext(context);
header.StreamHeaders.Add(streamHeader);
}
return(header);
}
public IDictionary <IMetadataMember, MetadataToken> UnlockMetadata()
{
if (!IsLocked)
{
throw new InvalidOperationException("Cannot unlock the metadata if it has not already been locked.");
}
var image = Image;
var buffer = new MetadataBuffer(image);
// Add assembly to buffer.
buffer.TableStreamBuffer.AddAssembly(image.Assembly);
// Create resources.
NetDirectory.ResourcesManifest = buffer.ResourcesBuffer.CreateDirectory();
// Unlock metadata.
Image = null;
// Replace old streams with new buffers.
var buffers = new MetadataStreamBuffer[]
{
buffer.TableStreamBuffer,
buffer.BlobStreamBuffer,
buffer.GuidStreamBuffer,
buffer.StringStreamBuffer,
buffer.UserStringStreamBuffer
};
foreach (var streamBuffer in buffers)
{
var header = StreamHeaders.FirstOrDefault(x => x.Name == streamBuffer.Name);
if (header == null)
{
header = new MetadataStreamHeader(streamBuffer.Name);
StreamHeaders.Add(header);
}
header.Stream = streamBuffer.CreateStream();
}
// Update managed entrypoint.
var newTokenMapping = buffer.TableStreamBuffer.GetNewTokenMapping();
NetDirectory.EntryPointToken = image.ManagedEntrypoint != null
? newTokenMapping[image.ManagedEntrypoint].ToUInt32()
: 0u;
return(newTokenMapping);
}
internal static MetadataStreamHeader FromReadingContext(ReadingContext context)
{
var reader = context.Reader;
var header = new MetadataStreamHeader
{
_readingContext = context,
StartOffset = reader.Position,
Offset = reader.ReadUInt32(),
Size = reader.ReadUInt32(),
Name = reader.ReadAlignedAsciiString(4),
};
return(header);
}
internal static MetadataStreamHeader FromReadingContext(ReadingContext context)
{
var reader = context.Reader;
var header = new MetadataStreamHeader
{
StartOffset = reader.Position,
Offset = reader.ReadUInt32(),
Size = reader.ReadUInt32(),
Name = reader.ReadAlignedAsciiString(4),
};
header._stream = new LazyValue <MetadataStream>(() =>
{
var mdHeader = context.Assembly.NetDirectory.MetadataHeader;
var stream = mdHeader.StreamParser.ReadStream(header.Name,
context.CreateSubContext(mdHeader.StartOffset + header.Offset, (int)header.Size));
stream.StreamHeader = header;
return(stream);
});
return(header);
}
public IDictionary <IMetadataMember, MetadataToken> UnlockMetadata(IMetadataBuilder builder)
{
if (!IsLocked)
{
throw new InvalidOperationException("Cannot unlock the metadata if it has not already been locked.");
}
var image = Image;
// Construct new metadata streams.
var buffer = builder.Rebuild(image);
// Create resources.
NetDirectory.ResourcesManifest = buffer.ResourcesBuffer.CreateDirectory();
// Serialize new streams.
var newStreams = new MetadataStreamBuffer[]
{
buffer.TableStreamBuffer,
buffer.BlobStreamBuffer,
buffer.GuidStreamBuffer,
buffer.StringStreamBuffer,
buffer.UserStringStreamBuffer
}.ToDictionary(x => x, x => x.CreateStream());
// Determine new entrypoint token.
var newTokenMapping = buffer.TableStreamBuffer.GetNewTokenMapping();
uint entrypointToken;
if (image.ManagedEntrypoint == null)
{
entrypointToken = 0u;
}
else
{
if (newTokenMapping.TryGetValue(image.ManagedEntrypoint, out var token))
{
entrypointToken = token.ToUInt32();
}
else
{
throw new MemberNotImportedException(image.ManagedEntrypoint);
}
}
// Unlock metadata, commit changes to streams.
Image = null;
foreach (var entry in newStreams)
{
var header = StreamHeaders.FirstOrDefault(x => x.Name == entry.Key.Name);
if (header == null)
{
header = new MetadataStreamHeader(entry.Key.Name);
StreamHeaders.Add(header);
}
header.Stream = entry.Value;
}
// Update managed entrypoint.
NetDirectory.EntryPointToken = entrypointToken;
return(newTokenMapping);
}
internal static MetadataStreamHeader FromReadingContext(ReadingContext context)
{
var reader = context.Reader;
var header = new MetadataStreamHeader
{
_readingContext = context,
StartOffset = reader.Position,
Offset = reader.ReadUInt32(),
Size = reader.ReadUInt32(),
Name = reader.ReadAlignedAsciiString(4),
};
return header;
}