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/* See LICENSE file for copyright and license details. */
#include "internals.h"
void
ztrunc(z_t a, z_t b, size_t bits)
{
size_t chars;
if (unlikely(zzero(b))) {
SET_SIGNUM(a, 0);
return;
}
chars = CEILING_BITS_TO_CHARS(bits);
a->used = MIN(chars, b->used);
if (unlikely(a->used < chars))
bits = 0;
if (likely(a != b)) {
a->sign = b->sign;
ENSURE_SIZE(a, a->used);
zmemcpy(a->chars, b->chars, a->used);
}
bits = BITS_IN_LAST_CHAR(bits);
if (likely(bits))
a->chars[a->used - 1] &= ((zahl_char_t)1 << bits) - 1;
TRIM_AND_ZERO(a);
}
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