number_formatting.cc revision c7f5f8508d98d5952d42ed7648c2a8f30a4da156 
1// Copyright (c) 2008 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "base/i18n/number_formatting.h"
6
7#include "base/format_macros.h"
8#include "base/logging.h"
9#include "base/singleton.h"
10#include "base/string_util.h"
11#include "base/utf_string_conversions.h"
12#include "unicode/numfmt.h"
13#include "unicode/ustring.h"
14
15namespace base {
16
17namespace {
18
19struct NumberFormatSingletonTraits
20    : public DefaultSingletonTraits<icu::NumberFormat> {
21  static icu::NumberFormat* New() {
22    UErrorCode status = U_ZERO_ERROR;
23    icu::NumberFormat* formatter = icu::NumberFormat::createInstance(status);
24    DCHECK(U_SUCCESS(status));
25    return formatter;
26  }
27  // There's no ICU call to destroy a NumberFormat object other than
28  // operator delete, so use the default Delete, which calls operator delete.
29  // This can cause problems if a different allocator is used by this file than
30  // by ICU.
31};
32
33}  // namespace
34
35string16 FormatNumber(int64 number) {
36  icu::NumberFormat* number_format =
37      Singleton<icu::NumberFormat, NumberFormatSingletonTraits>::get();
38
39  if (!number_format) {
40    // As a fallback, just return the raw number in a string.
41    return UTF8ToUTF16(StringPrintf("%" PRId64, number));
42  }
43  icu::UnicodeString ustr;
44  number_format->format(number, ustr);
45
46  return string16(ustr.getBuffer(), static_cast<size_t>(ustr.length()));
47}
48
49}  // namespace base
50