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comparison: security/nss/lib/freebl/mpi/mplogic.h
security/nss/lib/freebl/mpi/mplogic.h
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| 1 /* | |
| 2 * mplogic.h | |
| 3 * | |
| 4 * Bitwise logical operations on MPI values | |
| 5 * | |
| 6 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 7 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 8 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 9 | |
| 10 #ifndef _H_MPLOGIC_ | |
| 11 #define _H_MPLOGIC_ | |
| 12 | |
| 13 #include "mpi.h" | |
| 14 | |
| 15 /* | |
| 16 The logical operations treat an mp_int as if it were a bit vector, | |
| 17 without regard to its sign (an mp_int is represented in a signed | |
| 18 magnitude format). Values are treated as if they had an infinite | |
| 19 string of zeros left of the most-significant bit. | |
| 20 */ | |
| 21 | |
| 22 /* Parity results */ | |
| 23 | |
| 24 #define MP_EVEN MP_YES | |
| 25 #define MP_ODD MP_NO | |
| 26 | |
| 27 /* Bitwise functions */ | |
| 28 | |
| 29 mp_err mpl_not(mp_int *a, mp_int *b); /* one's complement */ | |
| 30 mp_err mpl_and(mp_int *a, mp_int *b, mp_int *c); /* bitwise AND */ | |
| 31 mp_err mpl_or(mp_int *a, mp_int *b, mp_int *c); /* bitwise OR */ | |
| 32 mp_err mpl_xor(mp_int *a, mp_int *b, mp_int *c); /* bitwise XOR */ | |
| 33 | |
| 34 /* Shift functions */ | |
| 35 | |
| 36 mp_err mpl_rsh(const mp_int *a, mp_int *b, mp_digit d); /* right shift */ | |
| 37 mp_err mpl_lsh(const mp_int *a, mp_int *b, mp_digit d); /* left shift */ | |
| 38 | |
| 39 /* Bit count and parity */ | |
| 40 | |
| 41 mp_err mpl_num_set(mp_int *a, int *num); /* count set bits */ | |
| 42 mp_err mpl_num_clear(mp_int *a, int *num); /* count clear bits */ | |
| 43 mp_err mpl_parity(mp_int *a); /* determine parity */ | |
| 44 | |
| 45 /* Get & Set the value of a bit */ | |
| 46 | |
| 47 mp_err mpl_set_bit(mp_int *a, mp_size bitNum, mp_size value); | |
| 48 mp_err mpl_get_bit(const mp_int *a, mp_size bitNum); | |
| 49 mp_err mpl_get_bits(const mp_int *a, mp_size lsbNum, mp_size numBits); | |
| 50 mp_err mpl_significant_bits(const mp_int *a); | |
| 51 | |
| 52 #endif /* end _H_MPLOGIC_ */ |
