Variant f_abs(CVarRef number) {
int64_t ival;
double dval;
DataType k = number.toNumeric(ival, dval, true);
if (k == KindOfDouble) {
return fabs(dval);
} else if (k == KindOfInt64) {
return ival >= 0 ? ival : -ival;
} else {
return 0;
}
}
Numeric f_pow(CVarRef base, CVarRef exp) {
int64_t bint, eint;
double bdbl, edbl;
DataType bt = base.toNumeric(bint, bdbl, true);
DataType et = exp.toNumeric(eint, edbl, true);
if (bt == KindOfInt64 && et == KindOfInt64 && eint >= 0) {
if (eint == 0) return 1LL;
if (bint == 0) return 0LL;
// calculate pow(long,long) in O(log exp) operations, bail if overflow
int64_t l1 = 1;
while (eint >= 1) {
int overflow;
double dval = 0.0;
if (eint % 2) {
--eint;
ZEND_SIGNED_MULTIPLY_LONG(l1, bint, l1, dval, overflow);
if (overflow) return dval * pow(bint, eint);
} else {
eint /= 2;
ZEND_SIGNED_MULTIPLY_LONG(bint, bint, bint, dval, overflow);
if (overflow) return (double)l1 * pow(dval, eint);
}
if (eint == 0) {
return l1;
}
}
}
if (bt != KindOfDouble) {
bdbl = base.toDouble();
}
if (et != KindOfDouble) {
edbl = exp.toDouble();
}
return pow(bdbl, edbl);
}
double f_round(CVarRef val, int64 precision /* = 0 */) {
int64 ival;
double dval;
DataType k = val.toNumeric(ival, dval, true);
if (k == KindOfInt64) {
if (precision >= 0) {
return ival;
} else {
dval = ival;
}
} else if (k != KindOfDouble) {
dval = val.toDouble();
}
PHP_ROUND_WITH_FUZZ(dval, precision);
return dval;
}
double f_round(CVarRef val, int64_t precision /* = 0 */,
int64_t mode /* = PHP_ROUND_HALF_UP */) {
int64_t ival;
double dval;
DataType k = val.toNumeric(ival, dval, true);
if (k == KindOfInt64) {
if (precision >= 0) {
return ival;
} else {
dval = ival;
}
} else if (k != KindOfDouble) {
dval = val.toDouble();
}
dval = php_math_round(dval, precision, mode);
return dval;
}