components/service/fwu/app/metadata_v2_reader.cpp

/*
 * Copyright (c) 2023, Arm Limited and Contributors. All rights reserved.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 */

#include <assert.h>
#include <protocols/service/fwu/packed-c/metadata_v2.h>
#include "metadata_reader.h"

class metadata_v2_reader : public metadata_version_specific_reader {

public:

	metadata_v2_reader();
	~metadata_v2_reader();

	bool is_supported(
		const uint8_t *buf,
		size_t data_len) const;

	void get_version(
		const uint8_t *buf,
		size_t data_len,
		unsigned int &version) const;

	void get_active_index(
		const uint8_t *buf,
		size_t data_len,
		unsigned int &active_index) const;
};

/* Registers on static construction */
static metadata_v2_reader the_v2_reader;


metadata_v2_reader::metadata_v2_reader() :
	metadata_version_specific_reader()
{
	metadata_reader::instance()->register_reader(this);
}

metadata_v2_reader::~metadata_v2_reader()
{

}

bool metadata_v2_reader::is_supported(
	const uint8_t *buf,
	size_t data_len) const
{
	assert(buf);

	const struct fwu_metadata *metadata = (const struct fwu_metadata *)buf;

	return
		(data_len >= sizeof(struct fwu_metadata)) &&
		(metadata->version == 2);
}

void metadata_v2_reader::get_version(
	const uint8_t *buf,
	size_t data_len,
	unsigned int &version) const
{
	assert(buf);
	assert(data_len >= sizeof(struct fwu_metadata));

	const struct fwu_metadata *metadata = (const struct fwu_metadata *)buf;

	version = metadata->version;
}

void metadata_v2_reader::get_active_index(
	const uint8_t *buf,
	size_t data_len,
	unsigned int &active_index) const
{
	assert(buf);
	assert(data_len >= sizeof(struct fwu_metadata));

	const struct fwu_metadata *metadata = (const struct fwu_metadata *)buf;

	active_index = metadata->active_index;
}