| /* |
| * mplogic.h |
| * |
| * Bitwise logical operations on MPI values |
| * |
| * This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| #ifndef _H_MPLOGIC_ |
| #define _H_MPLOGIC_ |
| |
| #include "mpi.h" |
| SEC_BEGIN_PROTOS |
| |
| /* |
| The logical operations treat an mp_int as if it were a bit vector, |
| without regard to its sign (an mp_int is represented in a signed |
| magnitude format). Values are treated as if they had an infinite |
| string of zeros left of the most-significant bit. |
| */ |
| |
| /* Parity results */ |
| |
| #define MP_EVEN MP_YES |
| #define MP_ODD MP_NO |
| |
| /* Bitwise functions */ |
| |
| mp_err mpl_not(mp_int *a, mp_int *b); /* one's complement */ |
| mp_err mpl_and(mp_int *a, mp_int *b, mp_int *c); /* bitwise AND */ |
| mp_err mpl_or(mp_int *a, mp_int *b, mp_int *c); /* bitwise OR */ |
| mp_err mpl_xor(mp_int *a, mp_int *b, mp_int *c); /* bitwise XOR */ |
| |
| /* Shift functions */ |
| |
| mp_err mpl_rsh(const mp_int *a, mp_int *b, mp_digit d); /* right shift */ |
| mp_err mpl_lsh(const mp_int *a, mp_int *b, mp_digit d); /* left shift */ |
| |
| /* Bit count and parity */ |
| |
| mp_err mpl_num_set(mp_int *a, unsigned int *num); /* count set bits */ |
| mp_err mpl_num_clear(mp_int *a, unsigned int *num); /* count clear bits */ |
| mp_err mpl_parity(mp_int *a); /* determine parity */ |
| |
| /* Get & Set the value of a bit */ |
| |
| mp_err mpl_set_bit(mp_int *a, mp_size bitNum, mp_size value); |
| mp_err mpl_get_bit(const mp_int *a, mp_size bitNum); |
| mp_err mpl_get_bits(const mp_int *a, mp_size lsbNum, mp_size numBits); |
| mp_size mpl_significant_bits(const mp_int *a); |
| |
| SEC_END_PROTOS |
| |
| #endif /* end _H_MPLOGIC_ */ |