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