diff options
| -rw-r--r-- | src/lib/openjp3d/pi.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/lib/openjp3d/pi.c b/src/lib/openjp3d/pi.c index a03be45e..a58ebcc7 100644 --- a/src/lib/openjp3d/pi.c +++ b/src/lib/openjp3d/pi.c @@ -223,6 +223,14 @@ static bool pi_next_rpcl(opj_pi_iterator_t * pi) rpx = res->pdx + levelnox; rpy = res->pdy + levelnoy; rpz = res->pdz + levelnoz; + + /* To avoid divisions by zero / undefined behaviour on shift */ + if (rpx >= 31 || ((comp->dx << rpx) >> rpx) != comp->dx || + rpy >= 31 || ((comp->dy << rpy) >> rpy) != comp->dy || + rpz >= 31 || ((comp->dz << rpz) >> rpz) != comp->dz) { + continue; + } + if ((!(pi->x % (comp->dx << rpx) == 0) || (pi->x == pi->tx0 && (trx0 << levelnox) % (1 << rpx)))) { continue; @@ -329,6 +337,14 @@ static bool pi_next_pcrl(opj_pi_iterator_t * pi) rpx = res->pdx + levelnox; rpy = res->pdy + levelnoy; rpz = res->pdz + levelnoz; + + /* To avoid divisions by zero / undefined behaviour on shift */ + if (rpx >= 31 || ((comp->dx << rpx) >> rpx) != comp->dx || + rpy >= 31 || ((comp->dy << rpy) >> rpy) != comp->dy || + rpz >= 31 || ((comp->dz << rpz) >> rpz) != comp->dz) { + continue; + } + if ((!(pi->x % (comp->dx << rpx) == 0) || (pi->x == pi->tx0 && (trx0 << levelnox) % (1 << rpx)))) { continue; @@ -432,6 +448,14 @@ static bool pi_next_cprl(opj_pi_iterator_t * pi) rpx = res->pdx + levelnox; rpy = res->pdy + levelnoy; rpz = res->pdz + levelnoz; + + /* To avoid divisions by zero / undefined behaviour on shift */ + if (rpx >= 31 || ((comp->dx << rpx) >> rpx) != comp->dx || + rpy >= 31 || ((comp->dy << rpy) >> rpy) != comp->dy || + rpz >= 31 || ((comp->dz << rpz) >> rpz) != comp->dz) { + continue; + } + if ((!(pi->x % (comp->dx << rpx) == 0) || (pi->x == pi->tx0 && (trx0 << levelnox) % (1 << rpx)))) { continue; |