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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "base/i18n/number_formatting.h"
- #include <stddef.h>
- #include <memory>
- #include "base/check.h"
- #include "base/format_macros.h"
- #include "base/i18n/message_formatter.h"
- #include "base/i18n/unicodestring.h"
- #include "base/lazy_instance.h"
- #include "base/strings/string_util.h"
- #include "base/strings/stringprintf.h"
- #include "base/strings/utf_string_conversions.h"
- #include "third_party/icu/source/common/unicode/ustring.h"
- #include "third_party/icu/source/i18n/unicode/numfmt.h"
- namespace base {
- namespace {
- // A simple wrapper around icu::NumberFormat that allows for resetting it
- // (as LazyInstance does not).
- struct NumberFormatWrapper {
- NumberFormatWrapper() {
- Reset();
- }
- void Reset() {
- // There's no ICU call to destroy a NumberFormat object other than
- // operator delete, so use the default Delete, which calls operator delete.
- // This can cause problems if a different allocator is used by this file
- // than by ICU.
- UErrorCode status = U_ZERO_ERROR;
- number_format.reset(icu::NumberFormat::createInstance(status));
- DCHECK(U_SUCCESS(status));
- }
- std::unique_ptr<icu::NumberFormat> number_format;
- };
- LazyInstance<NumberFormatWrapper>::DestructorAtExit g_number_format_int =
- LAZY_INSTANCE_INITIALIZER;
- LazyInstance<NumberFormatWrapper>::DestructorAtExit g_number_format_float =
- LAZY_INSTANCE_INITIALIZER;
- } // namespace
- std::u16string FormatNumber(int64_t number) {
- icu::NumberFormat* number_format =
- g_number_format_int.Get().number_format.get();
- if (!number_format) {
- // As a fallback, just return the raw number in a string.
- return ASCIIToUTF16(StringPrintf("%" PRId64, number));
- }
- icu::UnicodeString ustr;
- number_format->format(number, ustr);
- return i18n::UnicodeStringToString16(ustr);
- }
- std::u16string FormatDouble(double number, int fractional_digits) {
- icu::NumberFormat* number_format =
- g_number_format_float.Get().number_format.get();
- if (!number_format) {
- // As a fallback, just return the raw number in a string.
- return ASCIIToUTF16(StringPrintf("%f", number));
- }
- number_format->setMaximumFractionDigits(fractional_digits);
- number_format->setMinimumFractionDigits(fractional_digits);
- icu::UnicodeString ustr;
- number_format->format(number, ustr);
- return i18n::UnicodeStringToString16(ustr);
- }
- std::u16string FormatPercent(int number) {
- return i18n::MessageFormatter::FormatWithNumberedArgs(
- u"{0,number,percent}", static_cast<double>(number) / 100.0);
- }
- void ResetFormattersForTesting() {
- g_number_format_int.Get().Reset();
- g_number_format_float.Get().Reset();
- }
- } // namespace base
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