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* time.c (num_exact): use to_r for T_FLOAT.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@23929 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
akr 2009-07-01 20:38:57 +00:00
parent 36b84733f4
commit 841cf3b948
2 changed files with 5 additions and 48 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
Thu Jul 2 05:37:38 2009 Tanaka Akira <akr@fsij.org>
* time.c (num_exact): use to_r for T_FLOAT.
Thu Jul 2 05:15:54 2009 Tanaka Akira <akr@fsij.org>
* time.c (quo): return an integer if possible.

49
time.c
View file

@ -154,55 +154,8 @@ num_exact(VALUE v)
break;
case T_FLOAT:
{
double d = NUM2DBL(v);
int exp;
static long r = 0;
static int n = 0;
if (r == 0) {
long rr = FLT_RADIX;
int nn = 1;
while (rr < FIXNUM_MAX / FLT_RADIX) {
rr *= FLT_RADIX;
nn++;
}
n = nn;
r = rr;
}
d = frexp(d, &exp);
v = INT2FIX(0);
while (d != 0) {
long u;
exp -= n;
d *= r;
v = mul(v, LONG2FIX(r));
u = (long)d;
d -= u;
v = add(v, LONG2FIX(u));
}
if (exp < 0) {
VALUE w;
w = INT2FIX(1);
if (FLT_RADIX == 2)
w = lshift(w, INT2FIX(-exp));
else
while (exp) {
w = mul(w, INT2FIX(FLT_RADIX));
exp++;
}
v = quo(v, w);
}
else {
if (FLT_RADIX == 2)
v = lshift(v, INT2FIX(exp));
else
while (exp) {
v = mul(v, INT2FIX(FLT_RADIX));
exp--;
}
}
v = rb_convert_type(v, T_RATIONAL, "Rational", "to_r");
break;
}
case T_NIL:
goto typeerror;