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/* See LICENSE file for copyright and license details. */
#include "internals"
void
zor(z_t a, z_t b, z_t c)
{
size_t n, m;
if (zzero(b)) {
if (zzero(c)) {
SET_SIGNUM(a, 0);
} else {
if (a != c)
zset(a, c);
}
return;
} else if (zzero(c)) {
if (a != b)
zset(a, b);
return;
}
m = b->used > c->used ? b->used : c->used;
n = b->used + c->used - m;
if (a->alloced < m) {
a->alloced = m;
a->chars = realloc(a->chars, m * sizeof(*(a->chars)));
}
if (a == b) {
memcpy(a->chars + n, m == b->used ? b->chars : c->chars, (m - n) * sizeof(*(a->chars)));
while (n--)
a->chars[n] |= c->chars[n];
} else if (a == c) {
memcpy(a->chars + n, m == b->used ? b->chars : c->chars, (m - n) * sizeof(*(a->chars)));
while (n--)
a->chars[n] |= b->chars[n];
} else if (m == b->used) {
memcpy(a->chars, b->chars, m * sizeof(*(a->chars)));
while (n--)
a->chars[n] |= c->chars[n];
} else {
memcpy(a->chars, c->chars, m * sizeof(*(a->chars)));
while (n--)
a->chars[n] |= b->chars[n];
}
SET_SIGNUM(a, (zsignum(b) > 0 && zsignum(c) > 0) * 2 - 1);
}
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