public function format(DateTimePrintContext $context, &$buf)
{
$value = $context->getValueField($this->field);
if ($value === null) {
return false;
}
$decimalStyle = $context->getDecimalStyle();
$fraction = $this->convertToFraction($value);
if (gmp_cmp($fraction, 0) === 0) {
// scale is zero if value is zero
if ($this->minWidth > 0) {
if ($this->decimalPoint) {
$buf .= $decimalStyle->getDecimalSeparator();
}
for ($i = 0; $i < $this->minWidth; $i++) {
$buf .= $decimalStyle->getZeroDigit();
}
}
} else {
$outputScale = Math::min(Math::max(9, $this->minWidth), $this->maxWidth);
if ($outputScale !== 9) {
$div = 1 . str_repeat('0', 9 - $outputScale);
$fraction = gmp_div($fraction, $div);
}
$str = gmp_strval($fraction);
$pad = $outputScale - strlen($str);
$str = str_repeat('0', $pad) . $str;
// trim trailing zeros
while (strlen($str) > $this->minWidth && $str[strlen($str) - 1] === '0') {
$str = substr($str, 0, strlen($str) - 1);
}
$str = $decimalStyle->convertNumberToI18N($str);
if ($this->decimalPoint) {
$buf .= $decimalStyle->getDecimalSeparator();
}
$buf .= $str;
}
return true;
}
