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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkFileResourceStream.h"
#include "vtkMemoryResourceStream.h"
#include "vtkNew.h"
#include "vtkTestUtilities.h"
#include <vtksys/FStream.hxx>
#include <array>
#include <cstring>
#include <iostream>
#define Check(expr, message) \
do \
{ \
if (!(expr)) \
{ \
vtkErrorWithObjectMacro(nullptr, "Test failed: \n" << message); \
return false; \
} \
} while (false)
namespace
{
bool TestStream(vtkResourceStream* stream)
{
Check(!stream->EndOfStream(), "Invalid stream");
std::array<char, 5> buffer;
Check(stream->Read(buffer.data(), buffer.size()) == 5, "Read wrong size");
Check(!stream->EndOfStream(), "Reach end of file too early");
Check(std::strncmp(buffer.data(), "Hello", 5) == 0, "Read wrong data");
if (stream->SupportSeek())
{
Check(stream->Tell() == 5, "Tell wrong position");
Check(stream->Seek(2, vtkResourceStream::SeekDirection::Current) == 7, "Seek wrong position");
Check(!stream->EndOfStream(), "Seek must not modify EndOfStream value");
Check(stream->Tell() == 7, "Tell wrong position");
Check(stream->Seek(10, vtkResourceStream::SeekDirection::Current) == 17, "Seek wrong position");
Check(!stream->EndOfStream(), "Seek must not modify EndOfStream value");
Check(stream->Read(nullptr, 0) == 0, "Read wrong size");
Check(!stream->EndOfStream(), "Last zero byte read must not set EOS");
Check(stream->Seek(10, vtkResourceStream::SeekDirection::Current) == 27, "Seek wrong position");
Check(!stream->EndOfStream(), "EndOfStream must be false after Seek");
Check(stream->Read(buffer.data(), 0) == 0, "Read wrong size");
Check(!stream->EndOfStream(), "Last zero byte read must not set EOS");
Check(stream->Seek(10, vtkResourceStream::SeekDirection::Current) == 37, "Seek wrong position");
Check(!stream->EndOfStream(), "EndOfStream must be false after Seek");
Check(stream->Read(buffer.data(), buffer.size()) == 0, "Read wrong size");
Check(stream->EndOfStream(), "Last read must lead the stream to EOS");
Check(stream->Seek(2, vtkResourceStream::SeekDirection::Begin) == 2, "Seek wrong position");
Check(!stream->EndOfStream(), "EndOfStream must be false after Seek");
Check(stream->Seek(-6, vtkResourceStream::SeekDirection::End) == 6, "Seek wrong position");
Check(!stream->EndOfStream(), "EndOfStream must be false after Seek");
}
else
{
Check(!stream->EndOfStream(), "Reach end of file too early");
}
Check(stream->Read(buffer.data(), buffer.size()) == 5, "Read wrong size");
Check(!stream->EndOfStream(), "Reach end of file too early");
Check(std::strncmp(buffer.data(), "world", 5) == 0, "Read wrong data");
Check(stream->Read(buffer.data(), buffer.size()) == 1, "Read wrong size");
Check(std::strncmp(buffer.data(), "!", 1) == 0, "Read wrong data");
Check(stream->EndOfStream(), "Last read must lead the stream to EOS");
return true;
}
bool TestFileResource(const std::string& temp_dir)
{
const auto file_path = temp_dir + "/restmp.txt";
vtksys::ofstream{ file_path.c_str(), std::ios_base::binary } << "Hello world!";
vtkNew<vtkFileResourceStream> file;
if (!file->Open(file_path.c_str()))
{
return false;
}
if (file->Open(nullptr))
{
return false;
}
if (!file->Open(file_path.c_str()))
{
return false;
}
return TestStream(file);
}
bool TestMemoryResource()
{
const std::string str{ "Hello world!" };
vtkNew<vtkMemoryResourceStream> memory;
memory->SetBuffer(str.data(), str.size());
return TestStream(memory);
}
bool TestOwnedMemoryResource()
{
const std::string str{ "Hello world!" };
vtkNew<vtkMemoryResourceStream> memory;
memory->SetBuffer(str.data(), str.size(), true); // copied
Check(TestStream(memory), "Basic checks failed");
Check(memory->OwnsBuffer(), "OwnsBuffer must return true");
memory->SetBuffer(nullptr, 0);
Check(!memory->OwnsBuffer(), "OwnsBuffer must return false");
Check(memory->EndOfStream(), "EndOfStream must return true");
memory->SetBuffer(str.data(), str.size(), true); // copied
Check(memory->OwnsBuffer(), "OwnsBuffer must return true");
memory->SetBuffer(nullptr, 0, true); // must have same effect
Check(!memory->OwnsBuffer(), "OwnsBuffer must return false");
Check(memory->EndOfStream(), "EndOfStream must return true");
std::vector<char> vec{ 'H', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', '!' };
memory->SetBuffer(vec);
Check(TestStream(memory), "Basic checks failed");
Check(memory->OwnsBuffer(), "OwnsBuffer must return true");
memory->SetBuffer(std::move(vec));
Check(TestStream(memory), "Basic checks failed");
Check(memory->OwnsBuffer(), "OwnsBuffer must return true");
std::string tmpstr{ "Hello world!" };
memory->SetBuffer(tmpstr);
Check(TestStream(memory), "Basic checks failed");
Check(memory->OwnsBuffer(), "OwnsBuffer must return true");
memory->SetBuffer(std::move(tmpstr));
Check(TestStream(memory), "Basic checks failed");
Check(memory->OwnsBuffer(), "OwnsBuffer must return true");
return true;
}
}
int TestResourceStreams(int argc, char* argv[])
{
char* tempDir =
vtkTestUtilities::GetArgOrEnvOrDefault("-T", argc, argv, "VTK_TEMP_DIR", "Testing/Temporary");
if (!TestFileResource(tempDir))
{
return 1;
}
delete[] tempDir;
if (!TestMemoryResource())
{
return 1;
}
if (!TestOwnedMemoryResource())
{
return 1;
}
return 0;
}
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