private static String ReadSysString(Stream stream, SysStringContainer sysStrings, Boolean[] streamWidths, Byte[] tmpArray)
{
return(sysStrings.GetString((Int32)stream.ReadHeapIndex(streamWidths[SYS_STR_WIDTH_INDEX], tmpArray)));
}
internal MetaDataReader(Stream stream, out String versionStr)
{
var mdRoot = stream.Position;
// Prepare variables
var utf8 = MetaDataConstants.SYS_STRING_ENCODING;
var tmpArray = new Byte[8];
// Skip signature, major & minor version, and reserved
stream.SeekFromCurrent(12);
// Read version string
var versionStrByteLen = stream.ReadU32(tmpArray);
versionStr = stream.ReadZeroTerminatedString(versionStrByteLen, utf8);
// Skip flags
stream.SeekFromCurrent(2);
// Amount of streams
var amountOfStreams = stream.ReadU16(tmpArray);
// Stream headers
var streamDic = new Dictionary <String, Tuple <UInt32, UInt32> >();
//var totalRead = 12 // Sig, major & minor version, reserved
// + versionStrByteLen // Version string
// + 4; // Flags, amount of streams
for (var i = 0; i < amountOfStreams; ++i)
{
var offset = stream.ReadU32(tmpArray);
var size = stream.ReadU32(tmpArray);
//UInt32 streamStringBytesLen;
streamDic.Add(stream.ReadAlignedASCIIString(32), Tuple.Create(offset, size));
//totalRead += streamStringBytesLen + 8;
}
// Read all streams except table stream
SysStringContainer sysStrings = null;
GUIDContainer guids = null;
BLOBContainer blobs = null;
foreach (var kvp in streamDic)
{
stream.SeekFromBegin(mdRoot + kvp.Value.Item1);
switch (kvp.Key)
{
case Consts.SYS_STRING_STREAM_NAME:
sysStrings = new SysStringContainer(stream, kvp.Value.Item2);
break;
case Consts.USER_STRING_STREAM_NAME:
this.userStrings = new UserStringContainer(stream, kvp.Value.Item2);
break;
case Consts.GUID_STREAM_NAME:
guids = new GUIDContainer(stream, kvp.Value.Item2);
break;
case Consts.BLOB_STREAM_NAME:
blobs = new BLOBContainer(stream, kvp.Value.Item2);
break;
}
}
// Read table stream
stream.SeekFromBegin(mdRoot + streamDic[Consts.TABLE_STREAM_NAME].Item1
+ 6 // Skip reserved + major & minor versions
);
// Stream index sizes
var b = stream.ReadByteFromStream();
var streamWidths = new Boolean[MAX_WIDTH_INDEX];
streamWidths[SYS_STR_WIDTH_INDEX] = (b & WIDE_SYS_STRING_FLAG) != 0;
streamWidths[GUID_WIDTH_INDEX] = (b & WIDE_GUID_FLAG) != 0;
streamWidths[BLOB_WIDTH_INDEX] = (b & WIDE_BLOB_FLAG) != 0;
stream.SeekFromCurrent(1); // Skip reserved
// Present tables
var presentTableMask = stream.ReadU64(tmpArray);
stream.SeekFromCurrent(8); // Skip sorted
// Table row count
var tableSizes = Enumerable.Range(0, TablesUtils.AMOUNT_OF_TABLES)
.Select(
val =>
{
UInt32 size;
if (((UInt32)(presentTableMask >> val)) % 2 == 1)
{
size = stream.ReadU32(tmpArray);
}
else
{
size = 0;
}
return(size);
}).ToArray();
// Read actual tables
var tRefSizes = MetaDataConstants.GetCodedTableIndexSizes(tableSizes);
foreach (var curTable in Enumerable.Range(0, TablesUtils.AMOUNT_OF_TABLES))
{
switch ((Tables)curTable)
{
// VS2012 evaluates positional arguments from left to right, so creating Tuple inside lambda should work correctly
// This is not so in VS2010 ( see http://msdn.microsoft.com/en-us/library/hh678682.aspx )
case Tables.Module:
ReadTable(ref this.module, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU16(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadGUID(stream, guids, streamWidths, tmpArray),
ReadGUID(stream, guids, streamWidths, tmpArray),
ReadGUID(stream, guids, streamWidths, tmpArray))
);
break;
case Tables.TypeRef:
ReadTable(ref this.typeRef, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.ResolutionScope, tRefSizes, tmpArray, false),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray)
));
break;
case Tables.TypeDef:
ReadTable(ref this.typeDef, curTable, tableSizes, () =>
Tuple.Create(
(TypeAttributes)stream.ReadU32(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.TypeDefOrRef, tRefSizes, tmpArray, false),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.Field, tableSizes, tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.MethodDef, tableSizes, tmpArray)
));
break;
case Tables.Field:
ReadTable(ref this.field, curTable, tableSizes, () =>
Tuple.Create(
(FieldAttributes)stream.ReadU16(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.MethodDef:
ReadTable(ref this.methodDef, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU32(tmpArray),
(MethodImplAttributes)stream.ReadU16(tmpArray),
(MethodAttributes)stream.ReadU16(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.Parameter, tableSizes, tmpArray)
));
break;
case Tables.Parameter:
ReadTable(ref this.param, curTable, tableSizes, () =>
Tuple.Create(
(ParameterAttributes)stream.ReadU16(tmpArray),
stream.ReadU16(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray)
));
break;
case Tables.InterfaceImpl:
ReadTable(ref this.interfaceImpl, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.TypeDef, tableSizes, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.TypeDefOrRef, tRefSizes, tmpArray).Value
));
break;
case Tables.MemberRef:
ReadTable(ref this.memberRef, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.MemberRefParent, tRefSizes, tmpArray).Value,
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.Constant:
ReadTable(ref this.constant, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU16(tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.HasConstant, tRefSizes, tmpArray).Value,
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.CustomAttribute:
ReadTable(ref this.customAttribute, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.HasCustomAttribute, tRefSizes, tmpArray).Value,
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.CustomAttributeType, tRefSizes, tmpArray).Value,
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.FieldMarshal:
ReadTable(ref this.fieldMarshal, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.HasFieldMarshal, tRefSizes, tmpArray).Value,
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.DeclSecurity:
ReadTable(ref this.declSecurity, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU16(tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.HasDeclSecurity, tRefSizes, tmpArray).Value,
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.ClassLayout:
ReadTable(ref this.classLayout, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU16(tmpArray),
stream.ReadU32(tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.TypeDef, tableSizes, tmpArray)
));
break;
case Tables.FieldLayout:
ReadTable(ref this.fieldLayout, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU32(tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.Field, tableSizes, tmpArray)
));
break;
case Tables.StandaloneSignature:
ReadTable(ref this.standaloneSig, curTable, tableSizes, () => ReadBLOB(stream, blobs, streamWidths, tmpArray));
break;
case Tables.EventMap:
ReadTable(ref this.eventMap, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.TypeDef, tableSizes, tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.Event, tableSizes, tmpArray)
));
break;
case Tables.Event:
ReadTable(ref this.events, curTable, tableSizes, () =>
Tuple.Create(
(EventAttributes)stream.ReadU16(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.TypeDefOrRef, tRefSizes, tmpArray).Value
));
break;
case Tables.PropertyMap:
ReadTable(ref this.propertyMap, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.TypeDef, tableSizes, tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.Property, tableSizes, tmpArray)
));
break;
case Tables.Property:
ReadTable(ref this.property, curTable, tableSizes, () =>
Tuple.Create(
(PropertyAttributes)stream.ReadU16(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.MethodSemantics:
ReadTable(ref this.methodSemantics, curTable, tableSizes, () =>
Tuple.Create(
(MethodSemanticsAttributes)stream.ReadU16(tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.MethodDef, tableSizes, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.HasSemantics, tRefSizes, tmpArray).Value
));
break;
case Tables.MethodImpl:
ReadTable(ref this.methodImpl, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.TypeDef, tableSizes, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.MethodDefOrRef, tRefSizes, tmpArray).Value,
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.MethodDefOrRef, tRefSizes, tmpArray).Value
));
break;
case Tables.ModuleRef:
ReadTable(ref this.moduleRef, curTable, tableSizes, () => ReadSysString(stream, sysStrings, streamWidths, tmpArray));
break;
case Tables.TypeSpec:
ReadTable(ref this.typeSpec, curTable, tableSizes, () => ReadBLOB(stream, blobs, streamWidths, tmpArray));
break;
case Tables.ImplMap:
ReadTable(ref this.implMap, curTable, tableSizes, () =>
Tuple.Create(
(PInvokeAttributes)stream.ReadU16(tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.MemberForwarded, tRefSizes, tmpArray).Value,
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.ModuleRef, tableSizes, tmpArray)
));
break;
case Tables.FieldRVA:
ReadTable(ref this.fieldRVA, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU32(tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.Field, tableSizes, tmpArray)
));
break;
case Tables.Assembly:
ReadTable(ref this.assembly, curTable, tableSizes, () =>
Tuples.Create(
(AssemblyHashAlgorithm)stream.ReadU32(tmpArray),
stream.ReadU16(tmpArray),
stream.ReadU16(tmpArray),
stream.ReadU16(tmpArray),
stream.ReadU16(tmpArray),
(AssemblyFlags)stream.ReadU32(tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray)
));
break;
case Tables.AssemblyRef:
ReadTable(ref this.assemblyRef, curTable, tableSizes, () =>
Tuples.Create(
stream.ReadU16(tmpArray),
stream.ReadU16(tmpArray),
stream.ReadU16(tmpArray),
stream.ReadU16(tmpArray),
(AssemblyFlags)stream.ReadU32(tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.File:
ReadTable(ref this.file, curTable, tableSizes, () =>
Tuple.Create(
(FileAttributes)stream.ReadU32(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.ExportedType:
ReadTable(ref this.exportedType, curTable, tableSizes, () =>
Tuple.Create(
(TypeAttributes)stream.ReadU32(tmpArray),
stream.ReadU32(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.Implementation, tRefSizes, tmpArray).Value
));
break;
case Tables.ManifestResource:
ReadTable(ref this.manifestResource, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU32(tmpArray),
(ManifestResourceAttributes)stream.ReadU32(tmpArray),
ReadSysString(stream, sysStrings, streamWidths, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.Implementation, tRefSizes, tmpArray, false)
));
break;
case Tables.NestedClass:
ReadTable(ref this.nestedClass, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.TypeDef, tableSizes, tmpArray),
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.TypeDef, tableSizes, tmpArray)
));
break;
case Tables.GenericParameter:
ReadTable(ref this.genericParam, curTable, tableSizes, () =>
Tuple.Create(
stream.ReadU16(tmpArray),
(GenericParameterAttributes)stream.ReadU16(tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.TypeOrMethodDef, tRefSizes, tmpArray).Value,
ReadSysString(stream, sysStrings, streamWidths, tmpArray)
));
break;
case Tables.MethodSpec:
ReadTable(ref this.methodSpec, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.MethodDefOrRef, tRefSizes, tmpArray).Value,
ReadBLOB(stream, blobs, streamWidths, tmpArray)
));
break;
case Tables.GenericParameterConstraint:
ReadTable(ref this.genericParamConstraint, curTable, tableSizes, () =>
Tuple.Create(
MetaDataConstants.ReadSimpleTableIndex(stream, Tables.GenericParameter, tableSizes, tmpArray),
MetaDataConstants.ReadCodedTableIndex(stream, CodedTableIndexKind.TypeDefOrRef, tRefSizes, tmpArray).Value
));
break;
case Tables.FieldPtr:
case Tables.MethodPtr:
case Tables.ParameterPtr:
case Tables.EventPtr:
case Tables.PropertyPtr:
case Tables.EncLog:
case Tables.EncMap:
case Tables.AssemblyProcessor:
case Tables.AssemblyOS:
case Tables.AssemblyRefProcessor:
case Tables.AssemblyRefOS:
// Skip
break;
default:
throw new BadImageFormatException("Unknown table: " + curTable);
}
}
}