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1.divmod(0) should not crash, but return [Inf,NaN] (CRuby incompat); close #492

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This commit is contained in:
Yukihiro Matsumoto
2012-10-16 21:18:28 +09:00
parent e7ff2bf72e
commit 1bf70ea255
1 changed files with 12 additions and 0 deletions
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src/numeric.c
+12
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@@ -245,6 +245,11 @@ flodivmod(mrb_state *mrb, mrb_float x, mrb_float y, mrb_float *divp, mrb_float *
{
mrb_float div, mod;
if (y == 0.0) {
*divp = strtod("inf", NULL);
*modp = strtod("nan", NULL);
return;
}
mod = fmod(x, y);
if (isinf(x) && !isinf(y) && !isnan(y))
div = x;
@@ -772,6 +777,9 @@ fix_mod(mrb_state *mrb, mrb_value x)
if (FIXNUM_P(y) && (b=mrb_fixnum(y)) != 0) {
mrb_int mod;
if (mrb_fixnum(y) == 0) {
return mrb_float_value(strtod("nan", NULL));
}
fixdivmod(mrb, a, mrb_fixnum(y), 0, &mod);
return mrb_fixnum_value(mod);
}
@@ -798,6 +806,10 @@ fix_divmod(mrb_state *mrb, mrb_value x)
if (FIXNUM_P(y)) {
mrb_int div, mod;
if (mrb_fixnum(y) == 0) {
return mrb_assoc_new(mrb, mrb_float_value(strtod("inf", NULL)),
mrb_float_value(strtod("nan", NULL)));
}
fixdivmod(mrb, mrb_fixnum(x), mrb_fixnum(y), &div, &mod);
return mrb_assoc_new(mrb, mrb_fixnum_value(div), mrb_fixnum_value(mod));
}