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Patch from Igor to fix 120194

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This commit is contained in:
nboyd%atg.com 2002-04-29 00:56:30 +00:00
parent 2999458f3a
commit 4509cada43
1 changed files with 20 additions and 34 deletions
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54
js/rhino/src/org/mozilla/javascript/ScriptRuntime.java
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@ -574,31 +574,12 @@ public class ScriptRuntime {
* See ECMA 9.5.
*/
public static int toInt32(Object val) {
// 0x100000000 gives me a numeric overflow...
double two32 = 4294967296.0;
double two31 = 2147483648.0;
// short circuit for common small values; TokenStream
// returns them as Bytes.
if (val instanceof Byte)
return ((Number)val).intValue();
double d = toNumber(val);
if (d != d || d == 0.0 ||
d == Double.POSITIVE_INFINITY ||
d == Double.NEGATIVE_INFINITY)
return 0;
d = Math.IEEEremainder(d, two32);
d = d >= 0
? d
: d + two32;
if (d >= two31)
return (int)(d - two32);
else
return (int)d;
return toInt32(toNumber(val));
}
public static int toInt32(Object[] args, int index) {
@ -606,25 +587,30 @@ public class ScriptRuntime {
}
public static int toInt32(double d) {
// 0x100000000 gives me a numeric overflow...
double two32 = 4294967296.0;
double two31 = 2147483648.0;
if (d != d || d == 0.0 ||
d == Double.POSITIVE_INFINITY ||
d == Double.NEGATIVE_INFINITY)
if (d != d
|| d == Double.POSITIVE_INFINITY
|| d == Double.NEGATIVE_INFINITY)
{
return 0;
}
int id = (int)d;
if (id == d) {
// This covers -0.0 as well
return id;
}
d = (d >= 0) ? Math.floor(d) : Math.ceil(d);
double two32 = 4294967296.0;
d = Math.IEEEremainder(d, two32);
// (double)(long)d == d should hold here
d = d >= 0
? d
: d + two32;
if (d >= two31)
return (int)(d - two32);
else
return (int)d;
long l = (long)d;
// returning (int)d does not work as d can be outside int range
// but the result must always be 32 lower bits of l
return (int)l;
}
/**