1 // Copyright (C) 2023 Google LLC 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #ifndef ICING_QUERY_ADVANCED_QUERY_PARSER__STRING_UTIL_H_ 16 #define ICING_QUERY_ADVANCED_QUERY_PARSER__STRING_UTIL_H_ 17 18 #include <string> 19 #include <string_view> 20 21 #include "icing/text_classifier/lib3/utils/base/statusor.h" 22 23 namespace icing { 24 namespace lib { 25 26 namespace string_util { 27 28 // Returns: 29 // - On success, value with the escapes removed. 30 // - INVALID_ARGUMENT if an non-escaped quote is encountered. 31 // Ex. "fo\\\\o" -> "fo\\o" 32 libtextclassifier3::StatusOr<std::string> UnescapeStringValue( 33 std::string_view value); 34 35 // Returns: 36 // - On success, string_view pointing to the segment of escaped_string that, 37 // if unescaped, would match unescaped_token. 38 // - INVALID_ARGUMENT 39 // Ex. escaped_string="foo b\\a\\\"r baz", unescaped_token="ba\"r" 40 // returns "b\\a\\\"r" 41 libtextclassifier3::StatusOr<std::string_view> FindEscapedToken( 42 std::string_view escaped_string, std::string_view unescaped_token); 43 44 } // namespace string_util 45 46 } // namespace lib 47 } // namespace icing 48 49 #endif // ICING_QUERY_ADVANCED_QUERY_PARSER__STRING_UTIL_H_ 50