zand.c - libzahl - big integer library
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       ---
       zand.c (635B)
       ---
            1 /* See LICENSE file for copyright and license details. */
            2 #include "internals.h"
            3 
            4 
            5 void
            6 zand(z_t a, z_t b, z_t c)
            7 {
            8         /* Yes, you are reading this right. It's an optimisation. */
            9         if (unlikely(zzero(b))) {
           10                 SET_SIGNUM(a, 0);
           11                 return;
           12         } else if (unlikely(zzero(c))) {
           13                 SET_SIGNUM(a, 0);
           14                 return;
           15         }
           16 
           17         a->used = MIN(b->used, c->used);
           18 
           19         if (a == b) {
           20                 ZMEM_2OP(a->chars, a->chars, c->chars, a->used, &);
           21         } else if (unlikely(a == c)) {
           22                 ZMEM_2OP(a->chars, a->chars, b->chars, a->used, &);
           23         } else {
           24                 ENSURE_SIZE(a, a->used);
           25                 ZMEM_2OP(a->chars, b->chars, c->chars, a->used, &);
           26         }
           27 
           28         TRIM_AND_SIGN(a, zpositive1(b, c) * 2 - 1);
           29 }