Re: Weird?!?!

I don't think it's identical. Casting to long truncates, which means you may have an answer which is off by one. At 11:28 03/08/2002, Andi Gutmans wrote:

I think this is a good question. I'm not quite sure that casting dval to long is the same as multiplying the two longs. Anyone know the answer? Andi At 02:28 PM 7/31/2002 +0200, Stefan Esser wrote:

Hi, Could someone tell me why the Zend Engine calculates every multiplication 2 times??? zend_operators.c: ZEND_API int mul_function(zval *result, zval *op1, zval *op2 TSRMLS_DC) { ...

        if (op1->type == IS_LONG && op2->type == IS_LONG) {
                double dval = (double) op1->value.lval * (double) op2->value.lval;

                if ((dval > (double) LONG_MAX) || (dval < (double) LONG_MIN)) {
                        result->value.dval = dval;
                        result->type = IS_DOUBLE;
                } else {
                        result->value.lval = op1->value.lval * op2->value.lval;
                        result->type = IS_LONG;
                }
                return SUCCESS;

... should that be replaced with: result->value.lval = (long)dval; instead of calculating the multiplication again??? Stefan Esser -- PHP Development Mailing List <http://www.php.net/> To unsubscribe, visit: http://www.php.net/unsub.php

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