f381a8823
Denys Vlasenko
2018-12-05
Subject
bc: make division operation interruptible
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miscutils/bc.c+10 -2
| @@ -1840,12 +1840,19 @@ static BcStatus bc_num_d(BcNum *a, BcNum *b, BcNum *restrict c, size_t scale) | |
| for (q = 0; (!s && n[len] != 0) || bc_num_compare(n, p, len) >= 0; ++q) | |
| bc_num_subArrays(n, p, len); | |
| c->num[i] = q; | |
| + | // a=2^100000 |
| + | // scale=40000 |
| + | // 1/a <- without check below, this will not be interruptible |
| + | if (G_interrupt) { |
| + | s = BC_STATUS_FAILURE; |
| + | break; |
| + | } |
| } | |
| bc_num_retireMul(c, scale, a->neg, b->neg); | |
| bc_num_free(&cp); | |
| - | return BC_STATUS_SUCCESS; // can't make void, see bc_num_binary() |
| + | return s; |
| } | |
| static BcStatus bc_num_r(BcNum *a, BcNum *b, BcNum *restrict c, | |
| @@ -1864,7 +1871,8 @@ static BcStatus bc_num_r(BcNum *a, BcNum *b, BcNum *restrict c, | |
| } | |
| bc_num_init(&temp, d->cap); | |
| - | bc_num_d(a, b, c, scale); |
| + | s = bc_num_d(a, b, c, scale); |
| + | if (s) goto err; |
| if (scale != 0) scale = ts; | |