public MetadataHeapsBuilder(
int userStringIndexStartOffset = 0,
int stringIndexStartOffset = 0,
int blobIndexStartOffset = 0,
int guidIndexStartOffset = 0)
{
// Add zero-th entry to heaps.
// Full metadata represent empty blob/string at heap index 0.
// Delta metadata requires these to avoid nil generation-relative handles,
// which are technically viable but confusing.
_blobWriter.WriteByte(0);
_stringWriter.WriteByte(0);
_userStringWriter.WriteByte(0);
// When EnC delta is applied #US, #String and #Blob heaps are appended.
// Thus indices of strings and blobs added to this generation are offset
// by the sum of respective heap sizes of all previous generations.
_userStringIndexStartOffset = userStringIndexStartOffset;
_stringIndexStartOffset = stringIndexStartOffset;
_blobIndexStartOffset = blobIndexStartOffset;
// Unlike other heaps, #Guid heap in EnC delta is zero-padded.
_guidWriter.Pad(guidIndexStartOffset);
}