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/* See LICENSE file for copyright and license details. */
#include "internals.h"
void
zand(z_t a, z_t b, z_t c)
{
size_t n;
if (zzero(b) || zzero(c)) {
SET_SIGNUM(a, 0);
return;
}
n = MIN(b->used, c->used);
while (n--)
if (b->chars[n] & c->chars[n])
goto found_highest;
SET_SIGNUM(a, 0);
return;
found_highest:
a->used = ++n;
if (a == b) {
while (n--)
a->chars[n] &= c->chars[n];
} else if (a == c) {
while (n--)
a->chars[n] &= b->chars[n];
} else {
ENSURE_SIZE(a, a->used);
zmemcpy(a->chars, c->chars, a->used);
while (n--)
a->chars[n] &= b->chars[n];
}
SET_SIGNUM(a, (zsignum(b) > 0 || zsignum(c) > 0) * 2 - 1);
}
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