/** num_step_scan_args */
private IRubyObject[] scanStepArgs(ThreadContext context, IRubyObject[] args) {
IRubyObject to = context.runtime.getNil();
IRubyObject step = context.runtime.newFixnum(1);
if (args.length >= 1) to = args[0];
if (args.length >= 2) step = args[1];
// TODO: Fold kwargs into the @JRubyMethod decorator
IRubyObject[] kwargs = ArgsUtil.extractKeywordArgs(context, args, validStepArgs);
if (kwargs != null) {
to = kwargs[0];
step = kwargs[1];
if (!to.isNil() && args.length > 1) {
throw context.runtime.newArgumentError("to is given twice");
}
if (!step.isNil() && args.length > 2) {
throw context.runtime.newArgumentError("step is given twice");
}
} else {
if (RubyBasicObject.equalInternal(context, step, RubyFixnum.zero(context.runtime))) {
throw context.runtime.newArgumentError("step can't be 0");
}
if (step.isNil()) {
throw context.runtime.newTypeError("step must be numeric");
}
}
if (step.isNil()) {
step = RubyFixnum.one(context.runtime);
}
if (to.isNil()) {
if (f_negative_p(context, step)) {
to = RubyFloat.newFloat(context.runtime, Double.NEGATIVE_INFINITY);
} else {
to = RubyFloat.newFloat(context.runtime, Double.POSITIVE_INFINITY);
}
}
return new IRubyObject[] {to, step};
}
