kc3-lang/libtommath/mp_set.c
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Hash : 795cd201
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Date : 2019-10-29T21:48:50
simplifications: add s_mp_zero_(digs|buf) and s_mp_copy_digs Originally I made those as macros. However we have many other small functions like mp_clamp, mp_exch which are also not implemented as macros right now. If we would use c99, I would implement them as private static inline functions. And mp_exch would be a public static inline function. But since we are bound to c89, we simply use normal functions. To achieve optimal performance one should either use link time optimization or amalgamation.
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mp_set.c
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#include "tommath_private.h" #ifdef MP_SET_C /* LibTomMath, multiple-precision integer library -- Tom St Denis */ /* SPDX-License-Identifier: Unlicense */ /* set to a digit */ void mp_set(mp_int *a, mp_digit b) { int oldused = a->used; a->dp[0] = b & MP_MASK; a->sign = MP_ZPOS; a->used = (a->dp[0] != 0u) ? 1 : 0; s_mp_zero_digs(a->dp + a->used, oldused - a->used); } #endif