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/* See LICENSE file for copyright and license details. */
#include "internals.h"
void
zor(z_t a, z_t b, z_t c)
{
size_t n, m;
if (unlikely(zzero(b))) {
if (zzero(c))
SET_SIGNUM(a, 0);
else
SET(a, c);
return;
} else if (unlikely(zzero(c))) {
SET(a, b);
return;
}
m = MAX(b->used, c->used);
n = b->used + c->used - m;
ENSURE_SIZE(a, m);
if (a == b) {
if (b->used < c->used)
zmemcpy(a->chars + n, c->chars + n, m - n);
while (n--)
a->chars[n] |= c->chars[n];
} else if (unlikely(a == c)) {
if (c->used < b->used)
zmemcpy(a->chars + n, b->chars + n, m - n);
while (n--)
a->chars[n] |= b->chars[n];
} else if (m == b->used) {
zmemcpy(a->chars, b->chars, m);
while (n--)
a->chars[n] |= c->chars[n];
} else {
zmemcpy(a->chars, c->chars, m);
while (n--)
a->chars[n] |= b->chars[n];
}
a->used = m;
SET_SIGNUM(a, zpositive2(b, c) * 2 - 1);
}
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