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u3: avoid gmp realloc in u3s_sift_ud()

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This commit is contained in:
Joe Bryan 2021-04-22 17:26:36 -07:00
parent 1600e71daf
commit 0681c9a477
1 changed files with 6 additions and 2 deletions
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8
pkg/urbit/noun/serial.c
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@ -925,10 +925,14 @@ u3s_sift_ud_bytes(c3_w len_w, c3_y* byt_y)
}
{
// XX estimate size, allocate once
// avoid gmp realloc if possible
//
mpz_t a_mp;
mpz_init_set_ui(a_mp, val_s);
{
c3_d bit_d = (c3_d)(len_w / 4) * 10;
mpz_init2(a_mp, (c3_w)c3_min(bit_d, UINT32_MAX));
mpz_set_ui(a_mp, val_s);
}
while ( len_w ) {
if ( !BLOCK(byt_y) ) {