public unsafe static MetadataScope Load(PEImage pe, out CorHeader corHeader)
{
var dd = pe.Directories[DataDirectories.CLIHeader];
if (dd.IsNull)
{
throw new BadImageFormatException(string.Format(SR.MetadataImageNotValid, pe.Location));
}
var metadata = new MetadataScope();
using (var accessor = pe.OpenImageToSectionData(dd.RVA))
{
fixed(byte *pBuff = accessor.ReadBytes(sizeof(CorHeader)))
{
corHeader = *(CorHeader *)pBuff;
}
if (corHeader.Cb != MetadataConstants.CorHeaderSignature)
{
throw new BadImageFormatException(string.Format(SR.MetadataImageNotValid, pe.Location));
}
accessor.Position = pe.ResolvePositionToSectionData(corHeader.Metadata.RVA);
metadata.Read(accessor);
}
return(metadata);
}
private static void LoadTableIndexSizes(TableCompressionInfo info, MetadataScope metadata, int[] rowCounts)
{
for (int i = 0; i < MetadataConstants.TableCount; i++)
{
info.TableRowIndexSize4[i] = (rowCounts[i] >= (1 << 16));
}
}
internal MetadataTableStream(MetadataScope metadata)
{
_metadata = metadata;
_isOptimized = true;
_sortMask = 0xffffffffffffffff;
InitializeTables();
}
private static void LoadCodedTokenDataSizes(TableCompressionInfo info, MetadataScope metadata, int[] rowCounts)
{
for (int i = 0; i < MetadataConstants.CodedTokenCount; i++)
{
int maxRowCount = 0;
int codedTokenType = i + CodedTokenType.TypeDefOrRef;
var token = CodedTokenInfo.Get(codedTokenType);
for (int j = 0; j < token.TokenTypes.Length; j++)
{
int tableType = MetadataToken.GetTableTypeByTokenType(token.TokenTypes[j]);
int rowCount = rowCounts[tableType];
if (maxRowCount < rowCount)
{
maxRowCount = rowCount;
}
}
info.CodedTokenDataSize4[i] = (maxRowCount >= (1 << (16 - token.Tag)));
}
}
public static TableCompressionInfo Create(MetadataScope metadata)
{
var info = new TableCompressionInfo();
var tables = metadata.Tables;
int[] rowCounts = new int[MetadataConstants.TableCount];
for (int i = 0; i < MetadataConstants.TableCount; i++)
{
rowCounts[i] = tables[i].Count;
}
// Heap offset sizes.
LoadHeapOffsetSizes(info, metadata);
// Table row index sizes.
LoadTableIndexSizes(info, metadata, rowCounts);
// Coded token data sizes.
LoadCodedTokenDataSizes(info, metadata, rowCounts);
return(info);
}
public static TableCompressionInfo Create(MetadataScope metadata, int[] rowCounts, byte heapFlags)
{
var info = new TableCompressionInfo();
var tables = metadata.Tables;
// Heap offset sizes.
info.StringHeapOffsetSize4 =
((heapFlags & HeapOffsetFlags.StringHeap4) == HeapOffsetFlags.StringHeap4);
info.GuidHeapOffsetSize4 =
((heapFlags & HeapOffsetFlags.GuidHeap4) == HeapOffsetFlags.GuidHeap4);
info.BlobHeapOffsetSize4 =
((heapFlags & HeapOffsetFlags.BlobHeap4) == HeapOffsetFlags.BlobHeap4);
// Table row index sizes.
LoadTableIndexSizes(info, metadata, rowCounts);
// Coded token data sizes.
LoadCodedTokenDataSizes(info, metadata, rowCounts);
return(info);
}
private static void LoadHeapOffsetSizes(TableCompressionInfo info, MetadataScope metadata)
{
info.StringHeapOffsetSize4 = (metadata.Strings.Length >= (1 << 16));
info.GuidHeapOffsetSize4 = (metadata.Guids.Length >= (1 << 16));
info.BlobHeapOffsetSize4 = (metadata.Blobs.Length >= (1 << 16));
}
