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author | Miloslav Trmač <mitr@redhat.com> | 2010-07-22 17:35:05 +0200 |
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committer | Miloslav Trmač <mitr@redhat.com> | 2010-07-22 17:35:05 +0200 |
commit | ba1710ba3b123e790e0b604c689f9d5ae2b71971 (patch) | |
tree | 381bbae5f56b38e8d3a383f2046b26a1b3f7e1b6 /crypto/userspace/libtommath/bn_mp_copy.c | |
parent | 9666790d5518a80bc9e2a7e21fcb6bf836c1548d (diff) | |
parent | 893a38ffe67459db005bd1c7f129c04508cd015d (diff) | |
download | kernel-crypto-ba1710ba3b123e790e0b604c689f9d5ae2b71971.tar.gz kernel-crypto-ba1710ba3b123e790e0b604c689f9d5ae2b71971.tar.xz kernel-crypto-ba1710ba3b123e790e0b604c689f9d5ae2b71971.zip |
Merge branch 'standalone-rename' into integrate-cryptodev
Conflicts:
.gitignore
Diffstat (limited to 'crypto/userspace/libtommath/bn_mp_copy.c')
-rw-r--r-- | crypto/userspace/libtommath/bn_mp_copy.c | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/crypto/userspace/libtommath/bn_mp_copy.c b/crypto/userspace/libtommath/bn_mp_copy.c new file mode 100644 index 00000000000..b0de16d8abf --- /dev/null +++ b/crypto/userspace/libtommath/bn_mp_copy.c @@ -0,0 +1,68 @@ +#include <tommath.h> +#ifdef BN_MP_COPY_C +/* LibTomMath, multiple-precision integer library -- Tom St Denis + * + * LibTomMath is a library that provides multiple-precision + * integer arithmetic as well as number theoretic functionality. + * + * The library was designed directly after the MPI library by + * Michael Fromberger but has been written from scratch with + * additional optimizations in place. + * + * The library is free for all purposes without any express + * guarantee it works. + * + * Tom St Denis, tomstdenis@gmail.com, http://libtom.org + */ + +/* copy, b = a */ +int +mp_copy (mp_int * a, mp_int * b) +{ + int res, n; + + /* if dst == src do nothing */ + if (a == b) { + return MP_OKAY; + } + + /* grow dest */ + if (b->alloc < a->used) { + if ((res = mp_grow (b, a->used)) != MP_OKAY) { + return res; + } + } + + /* zero b and copy the parameters over */ + { + register mp_digit *tmpa, *tmpb; + + /* pointer aliases */ + + /* source */ + tmpa = a->dp; + + /* destination */ + tmpb = b->dp; + + /* copy all the digits */ + for (n = 0; n < a->used; n++) { + *tmpb++ = *tmpa++; + } + + /* clear high digits */ + for (; n < b->used; n++) { + *tmpb++ = 0; + } + } + + /* copy used count and sign */ + b->used = a->used; + b->sign = a->sign; + return MP_OKAY; +} +#endif + +/* $Source: /cvs/libtom/libtommath/bn_mp_copy.c,v $ */ +/* $Revision: 1.4 $ */ +/* $Date: 2006/12/28 01:25:13 $ */ |