public JsonObject Parse(ReadOnlySpan <byte> utf8Json, MemoryPool <byte> pool = null)
{
_pool = pool;
if (_pool == null)
{
_pool = MemoryPool <byte> .Shared;
}
_scratchManager = _pool.Rent(utf8Json.Length * 4);
_scratchMemory = _scratchManager.Memory;
int dbLength = _scratchMemory.Length / 2;
_db = _scratchMemory.Slice(0, dbLength);
_stack = new TwoStacks(_scratchMemory.Slice(dbLength));
_values = utf8Json;
_insideObject = 0;
_insideArray = 0;
_tokenType = 0;
_valuesIndex = 0;
_dbIndex = 0;
_jsonStartIsObject = false;
SkipWhitespace();
_jsonStartIsObject = _values[_valuesIndex] == '{';
int arrayItemsCount = 0;
int numberOfRowsForMembers = 0;
while (Read())
{
var tokenType = _tokenType;
switch (tokenType)
{
case JsonTokenType.ObjectStart:
AppendDbRow(JsonObject.JsonValueType.Object, _valuesIndex);
while (!_stack.TryPushObject(numberOfRowsForMembers))
{
ResizeDb();
}
numberOfRowsForMembers = 0;
break;
case JsonTokenType.ObjectEnd:
Write(_db.Span.Slice(FindLocation(_stack.ObjectStackCount - 1, true)), ref numberOfRowsForMembers);
numberOfRowsForMembers += _stack.PopObject();
break;
case JsonTokenType.ArrayStart:
AppendDbRow(JsonObject.JsonValueType.Array, _valuesIndex);
while (!_stack.TryPushArray(arrayItemsCount))
{
ResizeDb();
}
arrayItemsCount = 0;
break;
case JsonTokenType.ArrayEnd:
Write(_db.Span.Slice(FindLocation(_stack.ArrayStackCount - 1, false)), ref arrayItemsCount);
arrayItemsCount = _stack.PopArray();
break;
case JsonTokenType.Property:
ParsePropertyName();
ParseValue();
numberOfRowsForMembers++;
numberOfRowsForMembers++;
break;
case JsonTokenType.Value:
ParseValue();
arrayItemsCount++;
numberOfRowsForMembers++;
break;
default:
throw new ArgumentOutOfRangeException();
}
}
var result = new JsonObject(_values, _db.Span.Slice(0, _dbIndex), _pool, _scratchManager);
_scratchManager.Dispose();
_scratchManager = null;
return(result);
}
