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Fix math.modf for inf/-inf and int values.

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Enyby
2018-12-23 17:48:31 +02:00
committed by GitHub
parent 92cee0812d
commit c9ba2d4bb1
1 changed files with 7 additions and 2 deletions
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9
src/core/org/luaj/vm2/lib/MathLib.java
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@@ -212,9 +212,14 @@ public class MathLib extends TwoArgFunction {
static class modf extends VarArgFunction {
public Varargs invoke(Varargs args) {
double x = args.checkdouble(1);
LuaValue n = args.arg1();
/* number is its own integer part, no fractional part */
if (n.islong()) return varargsOf(n, valueOf(0.0));
double x = n.checkdouble();
/* integer part (rounds toward zero) */
double intPart = ( x > 0 ) ? Math.floor( x ) : Math.ceil( x );
double fracPart = x - intPart;
/* fractional part (test needed for inf/-inf) */
double fracPart = x == intPart ? 0.0 : x - intPart;
return varargsOf( valueOf(intPart), valueOf(fracPart) );
}
}