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bigint.c: check division by zero errors.

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2022-08-01 07:25:40 +09:00
parent b5a3fe5276
commit 569a8910af
1 changed files with 22 additions and 1 deletions
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mrbgems/mruby-bigint/core/bigint.c
+22 -1
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@@ -1187,6 +1187,9 @@ mrb_bint_div(mrb_state *mrb, mrb_value x, mrb_value y)
struct RBigint *b = RBIGINT(x);
struct RBigint *b2 = RBIGINT(y);
struct RBigint *b3 = bint_new(mrb);
if (b2->mp.sn == 0 || uzero(&b2->mp)) {
mrb_int_zerodiv(mrb);
}
mpz_mdiv(mrb, &b3->mp, &b->mp, &b2->mp);
return bint_norm(mrb, b3);
}
@@ -1263,10 +1266,16 @@ mrb_bint_mod(mrb_state *mrb, mrb_value x, mrb_value y)
return mrb_float_value(mrb, fmod(v1, v2));
}
#endif
if (mrb_integer_p(y) && mrb_integer(y) == 0) {
mrb_int_zerodiv(mrb);
}
y = mrb_as_bint(mrb, y);
struct RBigint *b = RBIGINT(x);
struct RBigint *b2 = RBIGINT(y);
struct RBigint *b3 = bint_new(mrb);
if (b2->mp.sn == 0 || uzero(&b2->mp)) {
mrb_int_zerodiv(mrb);
}
mpz_mmod(mrb, &b3->mp, &b->mp, &b2->mp);
return bint_norm(mrb, b3);
}
@@ -1276,10 +1285,16 @@ mrb_bint_rem(mrb_state *mrb, mrb_value x, mrb_value y)
{
/* called from mrbgems/mruby-numeric-ext/src/numeric_ext.c */
/* y should not be float */
if (mrb_integer_p(y) && mrb_integer(y) == 0) {
mrb_int_zerodiv(mrb);
}
y = mrb_as_bint(mrb, y);
struct RBigint *b = RBIGINT(x);
struct RBigint *b2 = RBIGINT(y);
struct RBigint *b3 = bint_new(mrb);
y = mrb_as_bint(mrb, y);
if (b2->mp.sn == 0 || uzero(&b2->mp)) {
mrb_int_zerodiv(mrb);
}
mpz_mod(mrb, &b3->mp, &b->mp, &b2->mp);
return bint_norm(mrb, b3);
}
@@ -1289,11 +1304,17 @@ mrb_bint_divmod(mrb_state *mrb, mrb_value x, mrb_value y)
{
/* called from src/numeric.c */
/* y should not be float */
if (mrb_integer_p(y) && mrb_integer(y) == 0) {
mrb_int_zerodiv(mrb);
}
y = mrb_as_bint(mrb, y);
struct RBigint *b = RBIGINT(x);
struct RBigint *b2 = RBIGINT(y);
struct RBigint *b3 = bint_new(mrb);
struct RBigint *b4 = bint_new(mrb);
if (b2->mp.sn == 0 || uzero(&b2->mp)) {
mrb_int_zerodiv(mrb);
}
mpz_mdivmod(mrb, &b3->mp, &b4->mp, &b->mp, &b2->mp);
x = bint_norm(mrb, b3);
y = bint_norm(mrb, b4);