nearby sdk refactor

PiperOrigin-RevId: 425434260

internal/platform/input_stream.h

@@ -0,0 +1,46 @@
+// Copyright 2020 Google LLC
+//
+// 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
+//
+//     https://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 PLATFORM_BASE_INPUT_STREAM_H_
+#define PLATFORM_BASE_INPUT_STREAM_H_
+
+#include <cstdint>
+
+#include "internal/platform/byte_array.h"
+#include "internal/platform/exception.h"
+
+namespace location {
+namespace nearby {
+
+// An InputStream represents an input stream of bytes.
+//
+// https://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html
+class InputStream {
+ public:
+  virtual ~InputStream() = default;
+
+  // throws Exception::kIo
+  virtual ExceptionOr<ByteArray> Read(std::int64_t size) = 0;
+
+  // throws Exception::kIo
+  virtual ExceptionOr<size_t> Skip(size_t offset);
+
+  // throws Exception::kIo
+  virtual Exception Close() = 0;
+};
+
+}  // namespace nearby
+}  // namespace location
+
+#endif  // PLATFORM_BASE_INPUT_STREAM_H_