protected static function getDecimalParseRegex(AgaviLocale $locale = null)
{
static $patternCache = array();
if ($locale) {
$localeId = $locale->getIdentifier();
} else {
$localeId = '';
}
if (isset($patternCache[$localeId])) {
return $patternCache[$localeId];
}
if ($locale) {
$decimalFormats = $locale->getDecimalFormats();
$groupingSeparator = $locale->getNumberSymbolGroup();
$decimalSeparator = $locale->getNumberSymbolDecimal();
$minusSign = $locale->getNumberSymbolMinusSign();
} else {
$decimalFormats = array('#,##0.###');
$groupingSeparator = ',';
$decimalSeparator = '.';
$minusSign = '-';
}
$patterns = array();
foreach ($decimalFormats as $decimalFormatList) {
$decimalFormatList = explode(';', $decimalFormatList, 2);
if (count($decimalFormatList) == 1) {
// no pattern for negative numbers
// we need a copy of the format with a minus prefix
$decimalFormatList[1] = '-' . $decimalFormatList[0];
}
foreach (array(true, false) as $withFraction) {
foreach ($decimalFormatList as $decimalFormat) {
// we need to make three parts: number, decimal part and minus sign
$decimalFormatChunks = preg_split('/([\\.\\-])/', $decimalFormat, 0, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY);
// there is a minus sign at the beginning or end! find it!
$pastDecimalSeparator = false;
foreach ($decimalFormatChunks as &$decimalFormatChunk) {
if ($decimalFormatChunk == '-') {
// always allow "-" in addition to the minus sign supplied by the locale. we do this because some locales (e.g. da, fa, se, sv) have U+2212 (the "real" minus sign) defined in the locale data, but no human can really type that character on their keyboard. consider it lenient parsing ;) see ticket #1293
$decimalFormatChunk = '(?P<minus>' . preg_quote($minusSign, '#') . '|-)';
} elseif ($decimalFormatChunk == '.') {
$pastDecimalSeparator = true;
if ($withFraction) {
$decimalFormatChunk = preg_quote($decimalSeparator, '#');
} else {
$decimalFormatChunk = '';
}
} else {
$decimalFormatChunk = preg_replace('/[#0,]+/u', '[\\d' . preg_quote($groupingSeparator, '#') . ']*', $decimalFormatChunk);
if (!$pastDecimalSeparator) {
if ($withFraction) {
$decimalFormatChunk = '(?P<num>(?=[\\d,]*\\d)' . $decimalFormatChunk . '(\\d|' . $decimalFormatChunk . '(?=\\.[\\d,]*\\d)))?';
} else {
$decimalFormatChunk = '(?P<num>(?=[\\d,]*\\d)' . $decimalFormatChunk . '\\d)';
}
} else {
if ($withFraction) {
$decimalFormatChunk = '(?P<dec>' . $decimalFormatChunk . '\\d)?';
} else {
$decimalFormatChunk = '';
}
}
}
}
$patterns[] = implode('', $decimalFormatChunks);
}
}
}
return $patternCache[$localeId] = '#(?J)^(' . implode('|', $patterns) . ')#u';
}
