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annotate libtommath/bn_mp_init_copy.c @ 1493:72fd994fe7bd

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Update build instructions for localoptions, and tidy
author Matt Johnston <matt@ucc.asn.au>
date Wed, 14 Feb 2018 00:24:32 +0800
parents 8bba51a55704
children f52919ffd3b1
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1 #include <tommath_private.h>
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2 #ifdef BN_MP_INIT_COPY_C
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3 /* LibTomMath, multiple-precision integer library -- Tom St Denis
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4 *
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5 * LibTomMath is a library that provides multiple-precision
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6 * integer arithmetic as well as number theoretic functionality.
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7 *
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8 * The library was designed directly after the MPI library by
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9 * Michael Fromberger but has been written from scratch with
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10 * additional optimizations in place.
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11 *
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12 * The library is free for all purposes without any express
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13 * guarantee it works.
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14 *
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15 * Tom St Denis, [email protected], http://libtom.org
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16 */
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17
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18 /* creates "a" then copies b into it */
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19 int mp_init_copy (mp_int * a, mp_int * b)
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20 {
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21 int res;
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22
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4fbf9a7556ed Use mp_init_size() to avoid some mp_grow()s
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23 if ((res = mp_init_size (a, b->used)) != MP_OKAY) {
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24 return res;
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25 }
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26
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27 if((res = mp_copy (b, a)) != MP_OKAY) {
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28 mp_clear(a);
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29 }
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30
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31 return res;
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32 }
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33 #endif
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34
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35 /* ref: $Format:%D$ */
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36 /* git commit: $Format:%H$ */
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37 /* commit time: $Format:%ai$ */