optional_blob_encoding.h (1497B)
1 /* 2 * Copyright (c) 2023 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef LOGGING_RTC_EVENT_LOG_ENCODER_OPTIONAL_BLOB_ENCODING_H_ 12 #define LOGGING_RTC_EVENT_LOG_ENCODER_OPTIONAL_BLOB_ENCODING_H_ 13 14 #include <stddef.h> 15 16 #include <optional> 17 #include <string> 18 #include <vector> 19 20 #include "absl/strings/string_view.h" 21 22 namespace webrtc { 23 24 // Encode a sequence of optional strings, whose length is not known to be 25 // discernable from the blob itself (i.e. without being transmitted OOB), 26 // in a way that would allow us to separate them again on the decoding side. 27 // EncodeOptionalBlobs() may not fail but may return an empty string 28 std::string EncodeOptionalBlobs( 29 const std::vector<std::optional<std::string>>& blobs); 30 31 // Calling DecodeOptionalBlobs() on an empty string, or with `num_of_blobs` set 32 // to 0, is an error. DecodeOptionalBlobs() returns an empty vector if it fails, 33 // which can happen if `encoded_blobs` is corrupted. 34 std::vector<std::optional<std::string>> DecodeOptionalBlobs( 35 absl::string_view encoded_blobs, 36 size_t num_of_blobs); 37 38 } // namespace webrtc 39 40 #endif // LOGGING_RTC_EVENT_LOG_ENCODER_OPTIONAL_BLOB_ENCODING_H_