bool CheckOffsetToken(uint value)
{
switch (GoToMetadataKind)
{
case GoToMetadataKind.Blob:
if (mdHeaders.BlobStream == null)
{
return(false);
}
return(value < mdHeaders.BlobStream.Span.Span.Length);
case GoToMetadataKind.Strings:
if (mdHeaders.StringsStream == null)
{
return(false);
}
return(value < mdHeaders.StringsStream.Span.Span.Length);
case GoToMetadataKind.US:
if ((value >> 24) == 0x70)
{
value &= 0x00FFFFFF;
}
if (mdHeaders.USStream == null)
{
return(false);
}
return(value < mdHeaders.USStream.Span.Span.Length);
case GoToMetadataKind.GUID:
return(value != 0 && mdHeaders.GUIDStream?.IsValidIndex(value) == true);
case GoToMetadataKind.Table:
return(GetMDTable(value) != null);
case GoToMetadataKind.MemberRva:
if (peHeaders == null)
{
return(false);
}
var mdTable = GetMDTable(value);
if (mdTable == null)
{
return(false);
}
if (mdTable.Table != Table.Method && mdTable.Table != Table.FieldRVA)
{
return(false);
}
// Column 0 is the RVA in both Method and FieldRVA tables
var pos = mdTable.Span.Start + ((value & 0x00FFFFFF) - 1) * mdTable.RowSize;
return(buffer.ReadUInt32(pos) != 0);
default:
throw new InvalidOperationException();
}
}
uint ReadFieldValue(HexBuffer buffer, ColumnInfo col)
{
var start = Span.Start + (ulong)col.Offset;
if (col.Size == 2)
{
return(buffer.ReadUInt16(start));
}
else if (col.Size == 4)
{
return(buffer.ReadUInt32(start));
}
throw new InvalidOperationException();
}
HexSpan?GetResourceSpan(HexBuffer buffer, uint offset)
{
var start = ResourcesSpan.Start + offset;
if (start + 4 > ResourcesSpan.End)
{
return(null);
}
uint size = buffer.ReadUInt32(start);
var end = start + 4 + size;
if (end > ResourcesSpan.End)
{
return(null);
}
return(HexSpan.FromBounds(start, end));
}
public UInt32FlagsHexField(HexBuffer buffer, string parentName, string name, HexPosition start)
: base(buffer, parentName, name, start, 4)
{
data = new UInt32VM(buffer.ReadUInt32(start), a => UpdateValue(), false);
}
public UInt32HexField(HexBuffer buffer, string parentName, string name, HexPosition start, bool useDecimal = false)
: base(buffer, parentName, name, start, 4)
{
data = new UInt32VM(buffer.ReadUInt32(start), a => UpdateValue(), useDecimal);
}