fix rub to crash gracefully upon decoding invalid data

if we exceed the number of available bits, crash.
This commit is contained in:
~hatteb-mitlyd 2014-05-08 10:55:31 -07:00
parent 65e621150f
commit 8494257a15

View File

@ -16,6 +16,8 @@
u2_atom w, x, y, z;
u2_atom p, q;
u2_atom m = j2_mbc(Pt1, add)(wir_r, a, u2_met(0, b));
// Compute c and d.
{
x = u2_rx(wir_r, a);
@ -23,6 +25,12 @@
while ( _0 == j2_mbc(Pt3, cut)(wir_r, _0, x, _1, b) ) {
u2_atom y = j2_mbc(Pt1, inc)(wir_r, x);
// Sanity check: crash if decoding more bits than available
if ( u2_yes == j2_mbc(Pt1, gth)(wir_r, x, m)) {
// fprintf(stderr, "[%%rub-hard %d %d %d]\r\n", a, x, m);
return u2_bl_bail(wir_r, c3__exit);
}
u2_rz(wir_r, x);
x = y;
}
@ -77,6 +85,6 @@
*/
u2_ho_jet
j2_mbj(Pt5, rub)[] = {
{ ".2", c3__hevy, j2_mb(Pt5, rub), Tier3, u2_none, u2_none },
{ ".2", c3__hevy, j2_mb(Pt5, rub), Tier5, u2_none, u2_none },
{ }
};