public function testSub()
{
Zend_Locale_Math_PhpMath::disable();
$this->assertEquals(-1, Zend_Locale_Math_PhpMath::Sub(1, 2));
$this->assertEquals(-2, Zend_Locale_Math_PhpMath::Sub(null, 2));
/**
* BCMath extension doesn't actually operatest with a scientific notation (e.g. 1.2e+100)
* So we shouldn't test numbers such as -9E+100, but probably should care about correct
* float => string conversion
*
* @todo provide correct behavior
*/
// $this->assertEquals(9E+300, Zend_Locale_Math_PhpMath::Sub(-9E+100, -9E+300));
$this->assertEquals(5.89, Zend_Locale_Math_PhpMath::Sub(10.4444, 4.5556, 2));
$this->assertEquals(6, Zend_Locale_Math_PhpMath::Sub(10.4444, 4.5556, 0));
$this->assertEquals(-6, Zend_Locale_Math_PhpMath::Sub(-10.4444, -4.5556, 0));
$this->assertEquals(-1, Zend_Locale_Math_PhpMath::Sub(10, 11, 2));
}
/**
* Surprisingly, the results of this implementation of round()
* prove better than the native PHP round(). For example, try:
* round(639.795, 2);
* round(267.835, 2);
* round(0.302515, 5);
* round(0.36665, 4);
* then try:
* Zend_Locale_Math::round('639.795', 2);
*/
public static function round($op1, $precision = 0)
{
if (self::$_bcmathDisabled) {
$op1 = round($op1, $precision);
if (strpos((string) $op1, 'E') === false) {
return self::normalize(round($op1, $precision));
}
}
if (strpos($op1, 'E') !== false) {
$op1 = self::floatalize($op1);
}
$op1 = trim(self::normalize($op1));
$length = strlen($op1);
if (($decPos = strpos($op1, '.')) === false) {
$op1 .= '.0';
$decPos = $length;
$length += 2;
}
if ($precision < 0 && abs($precision) > $decPos) {
return '0';
}
$digitsBeforeDot = $length - ($decPos + 1);
if ($precision >= $length - ($decPos + 1)) {
return $op1;
}
if ($precision === 0) {
$triggerPos = 1;
$roundPos = -1;
} elseif ($precision > 0) {
$triggerPos = $precision + 1;
$roundPos = $precision;
} else {
$triggerPos = $precision;
$roundPos = $precision - 1;
}
$triggerDigit = $op1[$triggerPos + $decPos];
if ($precision < 0) {
// zero fill digits to the left of the decimal place
$op1 = substr($op1, 0, $decPos + $precision) . str_pad('', abs($precision), '0');
}
if ($triggerDigit >= '5') {
if ($roundPos + $decPos == -1) {
return str_pad('1', $decPos + 1, '0');
}
$roundUp = str_pad('', $length, '0');
$roundUp[$decPos] = '.';
$roundUp[$roundPos + $decPos] = '1';
if ($op1 > 0) {
if (self::$_bcmathDisabled) {
return Zend_Locale_Math_PhpMath::Add($op1, $roundUp, $precision);
}
return self::Add($op1, $roundUp, $precision);
} else {
if (self::$_bcmathDisabled) {
return Zend_Locale_Math_PhpMath::Sub($op1, $roundUp, $precision);
}
return self::Sub($op1, $roundUp, $precision);
}
} elseif ($precision >= 0) {
return substr($op1, 0, $decPos + ($precision ? $precision + 1 : 0));
}
return (string) $op1;
}
public function testSub()
{
Zend_Locale_Math_PhpMath::disable();
$this->assertEquals(-1, Zend_Locale_Math_PhpMath::Sub(1, 2));
$this->assertEquals(-2, Zend_Locale_Math_PhpMath::Sub(null, 2));
try {
$this->assertEquals(0, Zend_Locale_Math_PhpMath::Sub(-9.000000000000001E+100, -8.999999999999999E+200));
$this->fail("exception expected");
} catch (Zend_Locale_Math_Exception $e) {
// success
}
$this->assertEquals(5.89, Zend_Locale_Math_PhpMath::Sub(10.4444, 4.5556, 2));
$this->assertEquals(6, Zend_Locale_Math_PhpMath::Sub(10.4444, 4.5556, 0));
$this->assertEquals(-6, Zend_Locale_Math_PhpMath::Sub(-10.4444, -4.5556, 0));
$this->assertEquals(-1, Zend_Locale_Math_PhpMath::Sub(10, 11, 2));
}
