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bc: make division operation interruptible

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function                                             old     new   delta
bc_num_d                                             564     584     +20
bc_num_r                                             230     245     +15
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(add/remove: 0/0 grow/shrink: 2/0 up/down: 35/0)               Total: 35 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Denys Vlasenko 2018-12-05 19:21:34 +01:00
parent b3cb90124b
commit f381a88234
1 changed files with 10 additions and 2 deletions
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12
miscutils/bc.c
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@ -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) for (q = 0; (!s && n[len] != 0) || bc_num_compare(n, p, len) >= 0; ++q)
bc_num_subArrays(n, p, len); bc_num_subArrays(n, p, len);
c->num[i] = q; 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_retireMul(c, scale, a->neg, b->neg);
bc_num_free(&cp); 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, 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_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; if (scale != 0) scale = ts;