Repo created

TMessagesProj/jni/voip/webrtc/base/i18n/number_formatting.cc

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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/format_macros.h"
+#include "base/i18n/message_formatter.h"
+#include "base/i18n/unicodestring.h"
+#include "base/lazy_instance.h"
+#include "base/logging.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
+
+string16 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);
+}
+
+string16 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);
+}
+
+string16 FormatPercent(int number) {
+  return i18n::MessageFormatter::FormatWithNumberedArgs(
+      ASCIIToUTF16("{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