/usr/include/bitstream/dvb/si/numbers.h is in libbitstream-dev 1.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* numbers.h: BCD functions
*****************************************************************************
* Copyright (C) 2009-2010 VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject
* to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#ifndef __BITSTREAM_DVB_BCD_H__
#define __BITSTREAM_DVB_BCD_H__
#include <stdint.h> /* uint8_t, uint16_t, etc... */
#ifdef __cplusplus
extern "C"
{
#endif
/*****************************************************************************
* DVB numbers
*****************************************************************************/
static inline unsigned int dvb_bcd_get(const uint8_t *p_bcd, uint8_t i_width)
{
unsigned int i_result = 0;
while (i_width >= 8) {
i_result *= 10;
i_result += (*p_bcd) >> 4;
i_result *= 10;
i_result += (*p_bcd) & 0xf;
i_width -= 8;
p_bcd++;
}
if (i_width == 4) {
i_result *= 10;
i_result += (*p_bcd) >> 4;
}
return i_result;
}
static inline void dvb_bcd_set(uint8_t *p_bcd, unsigned int i_int,
uint8_t i_width)
{
/* calculate 10^(i_width/4-1) */
unsigned int i_factor = 1, i_exp = i_width / 4 - 1, i_base = 10;
while (i_exp)
{
if (i_exp & 1)
i_factor *= i_base;
i_exp >>= 1;
i_base *= i_base;
}
while (i_factor >= 10) {
*p_bcd = (i_int / i_factor) << 4;
i_int %= i_factor;
i_factor /= 10;
*p_bcd |= (i_int / i_factor);
i_int %= i_factor;
i_factor /= 10;
p_bcd++;
}
if (i_factor == 1) {
*p_bcd &= 0xf;
*p_bcd |= i_int << 4;
}
}
static inline uint8_t dvb_bcd_set8(unsigned int i_int)
{
uint8_t i_result;
dvb_bcd_set(&i_result, i_int, 8);
return i_result;
}
#ifdef __cplusplus
}
#endif
#endif
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