/* bitcalc.h:  utilities to deal with bits and masks

   Copyright (c) 2012-2016, Joerg Hoppe
   j_hoppe@t-online.de, www.retrocmp.com

   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
   JOERG HOPPE 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.


   14-Feb-2012  JH      created
*/

#ifndef BITCALC_H_
#define BITCALC_H_

#include <stdint.h>

#define BIT(n)	(1 << (n))

#if !defined(BITCALC_C_)
extern unsigned char BitmaskFromLen8[9];
extern uint16_t BitmaskFromLen16[17] ;
extern uint32_t BitmaskFromLen32[33];
extern uint64_t BitmaskFromLen64[65];
extern unsigned char BitmaskReversed[256];
extern unsigned char BitsMirrored[256] ;

extern int DecimalDigitLenFromLen64[65] ;

#endif

uint64_t mirror_bits(uint64_t value, unsigned bitlen) ;

int find_lowest_bit64(uint64_t value, int bitval);
int get_msb_index64(uint64_t value);

uint64_t mount_bits_to_mask64(uint64_t buffer, uint64_t bitmask, int bitmask_leftshift,
		int buffer_bitoffset);

void encode_uint64_to_bytes(unsigned char *buffer, uint64_t value, unsigned bytecount);
uint64_t decode_uint64_from_bytes(unsigned char *buffer, unsigned bytecount);

int digitcount_from_bitlen(int radix, int bitlen) ;


#endif /* BITCALC_H_ */