/************************************************************************* * * Copyright 2022 Realm Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * **************************************************************************/ #ifndef REALM_UTIL_INPUT_STREAM_HPP #define REALM_UTIL_INPUT_STREAM_HPP #include <realm/utilities.hpp> #include <realm/util/span.hpp> namespace realm::util { class InputStream { public: /// Returns a span containing the next block. /// A zero-length span indicates end-of-input. virtual Span<const char> next_block() = 0; virtual ~InputStream() noexcept = default; }; class SimpleInputStream final : public InputStream { public: SimpleInputStream(Span<const char> data) : m_data(data) { } Span<const char> next_block() override { auto ret = m_data; m_data = m_data.last(0); return ret; } private: Span<const char> m_data; }; } // namespace realm::util #endif // REALM_UTIL_INPUT_STREAM_HPP