| 467 | |
| 468 | // returns Object covering both Double and Boolean return types |
| 469 | static Object doubleBinaryOperation(Double D1, Double D2, int kind) |
| 470 | throws UtilEvalError |
| 471 | { |
| 472 | double lhs = D1.doubleValue(); |
| 473 | double rhs = D2.doubleValue(); |
| 474 | |
| 475 | switch(kind) |
| 476 | { |
| 477 | // boolean |
| 478 | case LT: |
| 479 | case LTX: |
| 480 | return lhs < rhs ? Boolean.TRUE : Boolean.FALSE; |
| 481 | |
| 482 | case GT: |
| 483 | case GTX: |
| 484 | return lhs > rhs ? Boolean.TRUE : Boolean.FALSE; |
| 485 | |
| 486 | case EQ: |
| 487 | return lhs == rhs ? Boolean.TRUE : Boolean.FALSE; |
| 488 | |
| 489 | case LE: |
| 490 | case LEX: |
| 491 | return lhs <= rhs ? Boolean.TRUE : Boolean.FALSE; |
| 492 | |
| 493 | case GE: |
| 494 | case GEX: |
| 495 | return lhs >= rhs ? Boolean.TRUE : Boolean.FALSE; |
| 496 | |
| 497 | case NE: |
| 498 | return lhs != rhs ? Boolean.TRUE : Boolean.FALSE; |
| 499 | |
| 500 | // arithmetic |
| 501 | case PLUS: |
| 502 | return new Double(lhs + rhs); |
| 503 | |
| 504 | case MINUS: |
| 505 | return new Double(lhs - rhs); |
| 506 | |
| 507 | case STAR: |
| 508 | return new Double(lhs * rhs); |
| 509 | |
| 510 | case SLASH: |
| 511 | return new Double(lhs / rhs); |
| 512 | |
| 513 | case MOD: |
| 514 | return new Double(lhs % rhs); |
| 515 | |
| 516 | // can't shift floating-point values |
| 517 | case LSHIFT: |
| 518 | case LSHIFTX: |
| 519 | case RSIGNEDSHIFT: |
| 520 | case RSIGNEDSHIFTX: |
| 521 | case RUNSIGNEDSHIFT: |
| 522 | case RUNSIGNEDSHIFTX: |
| 523 | throw new UtilEvalError("Can't shift doubles"); |
| 524 | |
| 525 | default: |
| 526 | throw new InterpreterError( |