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annotate nss/lib/freebl/mpi/mplogic.h @ 4:b513267f632f tip

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Build DBM module
author Andre Heinecke <andre.heinecke@intevation.de>
date Tue, 05 Aug 2014 18:58:03 +0200
parents 1e5118fa0cb1
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1 /*
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2 * mplogic.h
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3 *
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4 * Bitwise logical operations on MPI values
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5 *
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6 * This Source Code Form is subject to the terms of the Mozilla Public
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7 * License, v. 2.0. If a copy of the MPL was not distributed with this
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8 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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9
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10 #ifndef _H_MPLOGIC_
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11 #define _H_MPLOGIC_
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12
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13 #include "mpi.h"
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14
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15 /*
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16 The logical operations treat an mp_int as if it were a bit vector,
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17 without regard to its sign (an mp_int is represented in a signed
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18 magnitude format). Values are treated as if they had an infinite
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19 string of zeros left of the most-significant bit.
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20 */
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21
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22 /* Parity results */
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23
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24 #define MP_EVEN MP_YES
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25 #define MP_ODD MP_NO
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26
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27 /* Bitwise functions */
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28
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29 mp_err mpl_not(mp_int *a, mp_int *b); /* one's complement */
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30 mp_err mpl_and(mp_int *a, mp_int *b, mp_int *c); /* bitwise AND */
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31 mp_err mpl_or(mp_int *a, mp_int *b, mp_int *c); /* bitwise OR */
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32 mp_err mpl_xor(mp_int *a, mp_int *b, mp_int *c); /* bitwise XOR */
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33
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34 /* Shift functions */
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35
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36 mp_err mpl_rsh(const mp_int *a, mp_int *b, mp_digit d); /* right shift */
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37 mp_err mpl_lsh(const mp_int *a, mp_int *b, mp_digit d); /* left shift */
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38
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39 /* Bit count and parity */
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40
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41 mp_err mpl_num_set(mp_int *a, int *num); /* count set bits */
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42 mp_err mpl_num_clear(mp_int *a, int *num); /* count clear bits */
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43 mp_err mpl_parity(mp_int *a); /* determine parity */
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44
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45 /* Get & Set the value of a bit */
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46
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47 mp_err mpl_set_bit(mp_int *a, mp_size bitNum, mp_size value);
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48 mp_err mpl_get_bit(const mp_int *a, mp_size bitNum);
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49 mp_err mpl_get_bits(const mp_int *a, mp_size lsbNum, mp_size numBits);
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50 mp_err mpl_significant_bits(const mp_int *a);
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51
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52 #endif /* end _H_MPLOGIC_ */
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