inear/dvb-tools/lib/libesg/types.c

/*
 * ESG parser
 *
 * Copyright (C) 2006 Stephane Este-Gracias (sestegra@free.fr)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
 */

#include <libesg/types.h>

uint8_t vluimsbf8(uint8_t *buffer, uint32_t size, uint32_t *length) {
	uint8_t offset = 0;
	*length = 0;

	do {
		if (size < offset) {
			offset = 0;
			*length = 0;
			break;
		}
		*length = (*length << 7) + (buffer[offset] & 0x7F);
	} while (buffer[offset++] & 0x80);

	return offset;
}