1 // Copyright 2019 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef V8_CRDTP_PARSER_HANDLER_H_ 6 #define V8_CRDTP_PARSER_HANDLER_H_ 7 8 #include <cstdint> 9 #include "span.h" 10 #include "status.h" 11 12 namespace v8_crdtp { 13 // Handler interface for parser events emitted by a streaming parser. 14 // See cbor::NewCBOREncoder, cbor::ParseCBOR, json::NewJSONEncoder, 15 // json::ParseJSON. 16 class ParserHandler { 17 public: 18 virtual ~ParserHandler() = default; 19 virtual void HandleMapBegin() = 0; 20 virtual void HandleMapEnd() = 0; 21 virtual void HandleArrayBegin() = 0; 22 virtual void HandleArrayEnd() = 0; 23 virtual void HandleString8(span<uint8_t> chars) = 0; 24 virtual void HandleString16(span<uint16_t> chars) = 0; 25 virtual void HandleBinary(span<uint8_t> bytes) = 0; 26 virtual void HandleDouble(double value) = 0; 27 virtual void HandleInt32(int32_t value) = 0; 28 virtual void HandleBool(bool value) = 0; 29 virtual void HandleNull() = 0; 30 31 // The parser may send one error even after other events have already 32 // been received. Client code is reponsible to then discard the 33 // already processed events. 34 // |error| must be an eror, as in, |error.is_ok()| can't be true. 35 virtual void HandleError(Status error) = 0; 36 }; 37 } // namespace v8_crdtp 38 39 #endif // V8_CRDTP_PARSER_HANDLER_H_ 40