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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "LocalizedNumber.h"
#include <limits>
#include <unicode/numfmt.h>
#include <unicode/parsepos.h>
#include <wtf/MathExtras.h>
#include <wtf/PassOwnPtr.h>
using namespace icu;
using namespace std;
namespace WebCore {
static PassOwnPtr<NumberFormat> createFormatterForCurrentLocale()
{
UErrorCode status = U_ZERO_ERROR;
OwnPtr<NumberFormat> formatter = adoptPtr(NumberFormat::createInstance(status));
return U_SUCCESS(status) ? formatter.release() : 0;
}
// This might return 0.
static NumberFormat* numberFormatter()
{
ASSERT(isMainThread());
static NumberFormat* formatter = createFormatterForCurrentLocale().leakPtr();
return formatter;
}
double parseLocalizedNumber(const String& numberString)
{
if (numberString.isEmpty())
return numeric_limits<double>::quiet_NaN();
NumberFormat* formatter = numberFormatter();
if (!formatter)
return numeric_limits<double>::quiet_NaN();
UnicodeString numberUnicodeString(numberString.characters(), numberString.length());
Formattable result;
ParsePosition position(0);
formatter->parse(numberUnicodeString, result, position);
if (position.getIndex() != numberUnicodeString.length())
return numeric_limits<double>::quiet_NaN();
UErrorCode status = U_ZERO_ERROR;
double numericResult = result.getDouble(status);
return U_SUCCESS(status) ? numericResult : numeric_limits<double>::quiet_NaN();
}
String formatLocalizedNumber(double number, unsigned fractionDigits)
{
NumberFormat* formatter = numberFormatter();
if (!formatter)
return String();
UnicodeString result;
formatter->setMaximumFractionDigits(clampToInteger(fractionDigits));
formatter->format(number, result);
return String(result.getBuffer(), result.length());
}
} // namespace WebCore
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