c3-lang/libtommath/mp_copy.c
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Hash : bcda8fc6
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Date : 2019-10-29T22:38:49
simplifications: remove unnecessary optimization * these double checks are not necessary * the compiler will move the early return outside of the called function, basically the functions is partially inlined * however lto/amalgamation needed for the optimization
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mp_copy.c
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#include "tommath_private.h" #ifdef MP_COPY_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* copy, b = a */ mp_err mp_copy(const mp_int *a, mp_int *b) { mp_err err; /* if dst == src do nothing */ if (a == b) { return MP_OKAY; } /* grow dest */ if ((err = mp_grow(b, a->used)) != MP_OKAY) { return err; } /* copy everything over and zero high digits */ s_mp_copy_digs(b->dp, a->dp, a->used); s_mp_zero_digs(b->dp + a->used, b->used - a->used); b->used = a->used; b->sign = a->sign; return MP_OKAY; } #endif