private void ReadMetadata()
{
int codeStartOffset = ModuleReader.PeekInt32();
var blockOffsets = ReadInt32Array(startOffset: HeaderSize, endOffset: codeStartOffset).ToList();
var blocks = ImmutableArray.CreateBuilder <BlockDefinition>(blockOffsets.Count);
for (int idxNext = 1; idxNext <= blockOffsets.Count; idxNext++)
{
int idxCurr = idxNext - 1;
int currStart = blockOffsets[idxCurr];
int length;
if (idxNext < blockOffsets.Count)
{
if (blockOffsets[idxNext] > blockOffsets[idxCurr])
{
length = blockOffsets[idxNext] - blockOffsets[idxCurr];
}
else
{
int currEnd = idxNext + 1 < blockOffsets.Count ? blockOffsets[idxNext + 1] : _stringTableEndOffset;
length = currEnd - blockOffsets[idxCurr];
}
}
else
{
length = _stringTableOffset - blockOffsets[idxCurr];
}
blocks.Add(new BlockDefinition(this, idxCurr, currStart, length));
}
Blocks = blocks.ToImmutable();
if (_stringTableOffset != _stringTableEndOffset)
{
var stringOffsets = ReadInt32Array(startOffset: _stringTableOffset, endOffset: _stringTableEndOffset).ToList();
for (int idxNext = 1; idxNext <= stringOffsets.Count; idxNext++)
{
int idxCurr = idxNext - 1;
int currStart = stringOffsets[idxCurr];
int currEnd = idxNext < stringOffsets.Count ? stringOffsets[idxNext] : (int)ModuleStream.Length;
int length = currEnd - currStart;
_stringTable.Add(new StringHandle(this, idxCurr, currStart, length));
}
}
if (_stringTable.Any())
{
_stringHeapOffset = _stringTable.First().Offset;
}
}
