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/* bits.h
Copyright (c) 2003-2014 HandBrake Team
This file is part of the HandBrake source code
Homepage: <http://handbrake.fr/>.
It may be used under the terms of the GNU General Public License v2.
For full terms see the file COPYING file or visit http://www.gnu.org/licenses/gpl-2.0.html
*/
#ifndef HB_BITS_H
#define HB_BITS_H
static inline int
allbits_set(uint32_t *bitmap, int num_words)
{
unsigned int i;
for( i = 0; i < num_words; i++ )
{
if( bitmap[i] != 0xFFFFFFFF )
return (0);
}
return (1);
}
static inline int
bit_is_set( uint32_t *bit_map, int bit_pos )
{
return( ( bit_map[bit_pos >> 5] & (0x1 << (bit_pos & 0x1F) ) ) != 0 );
}
static inline int
bit_is_clear( uint32_t *bit_map, int bit_pos )
{
return( ( bit_map[bit_pos >> 5] & ( 0x1 << (bit_pos & 0x1F) ) ) == 0 );
}
static inline void
bit_set( uint32_t *bit_map, int bit_pos )
{
bit_map[bit_pos >> 5] |= 0x1 << (bit_pos & 0x1F);
}
static inline void
bit_clear(uint32_t *bit_map, int bit_pos)
{
bit_map[bit_pos >> 5] &= ~( 0x1 << ( bit_pos & 0x1F ) );
}
static inline void
bit_nclear(uint32_t *bit_map, int start_pos, int stop_pos)
{
int start_word = start_pos >> 5;
int stop_word = stop_pos >> 5;
if ( start_word == stop_word )
{
bit_map[start_word] &= ( ( 0x7FFFFFFF >> ( 31 - (start_pos & 0x1F ) ) )
| ( 0xFFFFFFFE << ( stop_pos & 0x1F ) ) );
}
else
{
bit_map[start_word] &= ( 0x7FFFFFFF >> ( 31 - ( start_pos & 0x1F ) ) );
while (++start_word < stop_word)
bit_map[start_word] = 0;
bit_map[stop_word] &= 0xFFFFFFFE << ( stop_pos & 0x1F );
}
}
static inline void
bit_nset(uint32_t *bit_map, int start_pos, int stop_pos)
{
int start_word = start_pos >> 5;
int stop_word = stop_pos >> 5;
if ( start_word == stop_word )
{
bit_map[start_word] |= ( ( 0xFFFFFFFF << ( start_pos & 0x1F ) )
& ( 0xFFFFFFFF >> ( 31 - ( stop_pos & 0x1F ) ) ) );
}
else
{
bit_map[start_word] |= 0xFFFFFFFF << ( start_pos & 0x1F );
while (++start_word < stop_word)
bit_map[start_word] = 0xFFFFFFFF;
bit_map[stop_word] |= 0xFFFFFFFF >> ( 31 - ( stop_pos & 0x1F ) );
}
}
#endif /* HB_BITS_H */
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