test/byte-stream-buffer.cpp


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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
 * Copyright (C) 2018, Google Inc.
 *
 * byte_stream_buffer.cpp - ByteStreamBuffer tests
 */

#include <array>
#include <iostream>

#include "libcamera/internal/byte_stream_buffer.h"

#include "test.h"

using namespace std;
using namespace libcamera;

class ByteStreamBufferTest : public Test
{
protected:
	int run()
	{
		/*
		 * gcc 11.1.0 incorrectly raises a maybe-uninitialized warning
		 * when calling data.size() below (if the address sanitizer is
		 * disabled). Silence it by initializing the array.
		 */
		std::array<uint8_t, 100> data = {};
		unsigned int i;
		uint32_t value;
		int ret;

		/*
		 * Write mode.
		 */
		ByteStreamBuffer wbuf(data.data(), data.size());

		if (wbuf.base() != data.data() || wbuf.size() != data.size() ||
		    wbuf.offset() != 0 || wbuf.overflow()) {
			cerr << "Write buffer incorrectly constructed" << endl;
			return TestFail;
		}

		/* Test write. */
		value = 0x12345678;
		ret = wbuf.write(&value);
		if (ret || wbuf.offset() != 4 || wbuf.overflow() ||
		    *reinterpret_cast<uint32_t *>(data.data()) != 0x12345678) {
			cerr << "Write failed on write buffer" << endl;
			return TestFail;
		}

		/* Test write carve out. */
		ByteStreamBuffer wco = wbuf.carveOut(10);
		if (wco.base() != wbuf.base() + 4 || wco.size() != 10 ||
		    wco.offset() != 0 || wco.overflow() || wbuf.offset() != 14 ||
		    wbuf.overflow()) {
			cerr << "Carving out write buffer failed" << endl;
			return TestFail;
		}

		/* Test write on the carved out buffer. */