/**
* Minimum bcmath precision for output.
+ * @type int
*/
protected $outputPrecision;
/**
* Bcmath precision for internal calculations.
+ * @type int
*/
protected $internalPrecision;
/**
- * Whether or not BCMath is available
+ * Whether or not BCMath is available.
+ * @type bool
*/
private $bcmath;
- public function __construct($output_precision = 4, $internal_precision = 10, $force_no_bcmath = false) {
+ public function __construct($output_precision = 4, $internal_precision = 10, $force_no_bcmath = false)
+ {
$this->outputPrecision = $output_precision;
$this->internalPrecision = $internal_precision;
$this->bcmath = !$force_no_bcmath && function_exists('bcmul');
* it before passing it here!
* @param string $to_unit
* Unit to convert to.
+ * @return HTMLPurifier_Length|bool
* @note
* About precision: This conversion function pays very special
* attention to the incoming precision of values and attempts
* and this causes some decimals to be excluded, those
* decimals will be added on.
*/
- public function convert($length, $to_unit) {
-
- if (!$length->isValid()) return false;
+ public function convert($length, $to_unit)
+ {
+ if (!$length->isValid()) {
+ return false;
+ }
- $n = $length->getN();
+ $n = $length->getN();
$unit = $length->getUnit();
if ($n === '0' || $unit === false) {
$state = $dest_state = false;
foreach (self::$units as $k => $x) {
- if (isset($x[$unit])) $state = $k;
- if (isset($x[$to_unit])) $dest_state = $k;
+ if (isset($x[$unit])) {
+ $state = $k;
+ }
+ if (isset($x[$to_unit])) {
+ $dest_state = $k;
+ }
+ }
+ if (!$state || !$dest_state) {
+ return false;
}
- if (!$state || !$dest_state) return false;
// Some calculations about the initial precision of the number;
// this will be useful when we need to do final rounding.
$sigfigs = $this->getSigFigs($n);
- if ($sigfigs < $this->outputPrecision) $sigfigs = $this->outputPrecision;
+ if ($sigfigs < $this->outputPrecision) {
+ $sigfigs = $this->outputPrecision;
+ }
// BCMath's internal precision deals only with decimals. Use
// our default if the initial number has no decimals, or increase
// it by how ever many decimals, thus, the number of guard digits
// will always be greater than or equal to internalPrecision.
- $log = (int) floor(log(abs($n), 10));
+ $log = (int)floor(log(abs($n), 10));
$cp = ($log < 0) ? $this->internalPrecision - $log : $this->internalPrecision; // internal precision
for ($i = 0; $i < 2; $i++) {
}
// Post-condition: $unit == $to_unit
- if ($unit !== $to_unit) return false;
+ if ($unit !== $to_unit) {
+ return false;
+ }
// Useful for debugging:
//echo "<pre>n";
//echo "$n\nsigfigs = $sigfigs\nnew_log = $new_log\nlog = $log\nrp = $rp\n</pre>\n";
$n = $this->round($n, $sigfigs);
- if (strpos($n, '.') !== false) $n = rtrim($n, '0');
+ if (strpos($n, '.') !== false) {
+ $n = rtrim($n, '0');
+ }
$n = rtrim($n, '.');
return new HTMLPurifier_Length($n, $unit);
* @param string $n Decimal number
* @return int number of sigfigs
*/
- public function getSigFigs($n) {
+ public function getSigFigs($n)
+ {
$n = ltrim($n, '0+-');
$dp = strpos($n, '.'); // decimal position
if ($dp === false) {
$sigfigs = strlen(rtrim($n, '0'));
} else {
$sigfigs = strlen(ltrim($n, '0.')); // eliminate extra decimal character
- if ($dp !== 0) $sigfigs--;
+ if ($dp !== 0) {
+ $sigfigs--;
+ }
}
return $sigfigs;
}
/**
* Adds two numbers, using arbitrary precision when available.
+ * @param string $s1
+ * @param string $s2
+ * @param int $scale
+ * @return string
*/
- private function add($s1, $s2, $scale) {
- if ($this->bcmath) return bcadd($s1, $s2, $scale);
- else return $this->scale($s1 + $s2, $scale);
+ private function add($s1, $s2, $scale)
+ {
+ if ($this->bcmath) {
+ return bcadd($s1, $s2, $scale);
+ } else {
+ return $this->scale((float)$s1 + (float)$s2, $scale);
+ }
}
/**
* Multiples two numbers, using arbitrary precision when available.
+ * @param string $s1
+ * @param string $s2
+ * @param int $scale
+ * @return string
*/
- private function mul($s1, $s2, $scale) {
- if ($this->bcmath) return bcmul($s1, $s2, $scale);
- else return $this->scale($s1 * $s2, $scale);
+ private function mul($s1, $s2, $scale)
+ {
+ if ($this->bcmath) {
+ return bcmul($s1, $s2, $scale);
+ } else {
+ return $this->scale((float)$s1 * (float)$s2, $scale);
+ }
}
/**
* Divides two numbers, using arbitrary precision when available.
+ * @param string $s1
+ * @param string $s2
+ * @param int $scale
+ * @return string
*/
- private function div($s1, $s2, $scale) {
- if ($this->bcmath) return bcdiv($s1, $s2, $scale);
- else return $this->scale($s1 / $s2, $scale);
+ private function div($s1, $s2, $scale)
+ {
+ if ($this->bcmath) {
+ return bcdiv($s1, $s2, $scale);
+ } else {
+ return $this->scale((float)$s1 / (float)$s2, $scale);
+ }
}
/**
* Rounds a number according to the number of sigfigs it should have,
* using arbitrary precision when available.
+ * @param float $n
+ * @param int $sigfigs
+ * @return string
*/
- private function round($n, $sigfigs) {
- $new_log = (int) floor(log(abs($n), 10)); // Number of digits left of decimal - 1
+ private function round($n, $sigfigs)
+ {
+ $new_log = (int)floor(log(abs($n), 10)); // Number of digits left of decimal - 1
$rp = $sigfigs - $new_log - 1; // Number of decimal places needed
$neg = $n < 0 ? '-' : ''; // Negative sign
if ($this->bcmath) {
if ($rp >= 0) {
- $n = bcadd($n, $neg . '0.' . str_repeat('0', $rp) . '5', $rp + 1);
+ $n = bcadd($n, $neg . '0.' . str_repeat('0', $rp) . '5', $rp + 1);
$n = bcdiv($n, '1', $rp);
} else {
// This algorithm partially depends on the standardized
/**
* Scales a float to $scale digits right of decimal point, like BCMath.
+ * @param float $r
+ * @param int $scale
+ * @return string
*/
- private function scale($r, $scale) {
+ private function scale($r, $scale)
+ {
if ($scale < 0) {
// The f sprintf type doesn't support negative numbers, so we
// need to cludge things manually. First get the string.
- $r = sprintf('%.0f', (float) $r);
+ $r = sprintf('%.0f', (float)$r);
// Due to floating point precision loss, $r will more than likely
// look something like 4652999999999.9234. We grab one more digit
// than we need to precise from $r and then use that to round
// appropriately.
- $precise = (string) round(substr($r, 0, strlen($r) + $scale), -1);
+ $precise = (string)round(substr($r, 0, strlen($r) + $scale), -1);
// Now we return it, truncating the zero that was rounded off.
return substr($precise, 0, -1) . str_repeat('0', -$scale + 1);
}
- return sprintf('%.' . $scale . 'f', (float) $r);
+ return sprintf('%.' . $scale . 'f', (float)$r);
}
-
}
// vim: et sw=4 sts=4
projects / quix0rs-gnu-social.git / blobdiff