106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
// Protocol Buffers - Google's data interchange format
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// Copyright 2008 Google Inc. All rights reserved.
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// https://developers.google.com/protocol-buffers/
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#ifndef GOOGLE_PROTOBUF_UTIL_TEST_INPUT_STREAM_H__
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#define GOOGLE_PROTOBUF_UTIL_TEST_INPUT_STREAM_H__
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#include <initializer_list>
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#include <string>
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#include <utility>
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#include <vector>
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#include "absl/log/absl_check.h"
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#include "absl/strings/string_view.h"
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#include "google/protobuf/io/zero_copy_stream.h"
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#include "google/protobuf/stubs/status_macros.h"
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namespace google {
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namespace protobuf {
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namespace json_internal {
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// A ZeroCopyInputStream for writing unit tests.
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class TestInputStream final : public io::ZeroCopyInputStream {
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public:
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TestInputStream(std::initializer_list<std::string> strings)
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: strings_(strings) {}
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explicit TestInputStream(std::vector<std::string> strings)
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: strings_(std::move(strings)) {}
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~TestInputStream() override = default;
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size_t Consumed() const { return next_; }
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bool Next(const void** data, int* size) override {
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if (next_ == strings_.size()) {
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return false;
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}
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if (next_ > 0) {
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// Destroy the previous string so that ASAN can catch misbehavior
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// correctly.
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ReconstructAt(&strings_[next_ - 1]);
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}
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absl::string_view next = strings_[next_++];
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*data = next.data();
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*size = static_cast<int>(next.size());
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return true;
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}
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// TestInputStream currently does not support these members.
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void BackUp(int) override { ABSL_CHECK(false); }
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bool Skip(int) override {
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ABSL_CHECK(false);
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return false;
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}
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int64_t ByteCount() const override {
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ABSL_CHECK(false);
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return 0;
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}
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private:
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// Some versions of Clang can't figure out that
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// x.std::string::~string()
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// is valid syntax, so we indirect through a type param, instead.
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//
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// Of course, our luck has it that std::destroy_at is a C++17 feature. :)
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template <typename T>
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static void ReconstructAt(T* p) {
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p->~T();
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new (p) T;
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}
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std::vector<std::string> strings_;
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size_t next_ = 0;
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};
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} // namespace json_internal
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} // namespace protobuf
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} // namespace google
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#endif // GOOGLE_PROTOBUF_UTIL_TEST_INPUT_STREAM_H__
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