public DwarfAbbreviationItem GetOrCreate(DwarfAbbreviationItemKey itemKey)
{
if (!_mapKeyToItem.TryGetValue(itemKey, out var item))
{
item = new DwarfAbbreviationItem(_nextCode, itemKey.Tag, itemKey.HasChildren, itemKey.Descriptors)
{
Parent = this
};
if (_mapItems.Count > 0)
{
_mapItems[_nextCode] = item;
}
else
{
_items.Add(item);
}
_mapKeyToItem[itemKey] = item;
_nextCode++;
}
return(item);
}
private bool TryReadNext(DwarfReader reader)
{
var startOffset = (ulong)reader.Offset;
var code = reader.ReadULEB128();
if (code == 0)
{
return(false);
}
var item = new DwarfAbbreviationItem
{
Offset = startOffset,
Code = code
};
var index = code - 1;
bool canAddToList = _mapItems.Count == 0 && index < int.MaxValue && _items.Count == (int)index;
item.ReadInternal(reader);
if (canAddToList)
{
_items.Add(item);
_nextCode++;
}
else
{
if (_mapItems.Count == 0)
{
for (var i = 0; i < _items.Count; i++)
{
var previousItem = _items[i];
_mapItems.Add((ulong)i + 1, previousItem);
}
_items.Clear();
}
// TODO: check collisions
if (_mapItems.ContainsKey(code))
{
reader.Diagnostics.Error(DiagnosticId.DWARF_ERR_InvalidData, $"Invalid code {code} found while another code already exists in this abbreviation.");
return(false);
}
_mapItems.Add(code, item);
_nextCode = Math.Max(code, _nextCode) + 1;
}
var key = new DwarfAbbreviationItemKey(item.Tag, item.HasChildren, item.Descriptors);
_mapKeyToItem.Add(key, item);
return(true);
}
