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// Copyright (c) 2006-2008 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/string_util.h"
#include <string.h>
#include <vector>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/singleton.h"
#include "unicode/numfmt.h"
#include "unicode/ustring.h"
// Number formatting -----------------------------------------------------------
namespace {
struct NumberFormatSingletonTraits
: public DefaultSingletonTraits<icu::NumberFormat> {
static icu::NumberFormat* New() {
UErrorCode status = U_ZERO_ERROR;
icu::NumberFormat* formatter = icu::NumberFormat::createInstance(status);
DCHECK(U_SUCCESS(status));
return formatter;
}
// 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.
};
} // namespace
std::wstring FormatNumber(int64 number) {
icu::NumberFormat* number_format =
Singleton<icu::NumberFormat, NumberFormatSingletonTraits>::get();
if (!number_format) {
// As a fallback, just return the raw number in a string.
return StringPrintf(L"%lld", number);
}
icu::UnicodeString ustr;
number_format->format(number, ustr);
#if defined(WCHAR_T_IS_UTF16)
return std::wstring(ustr.getBuffer(),
static_cast<std::wstring::size_type>(ustr.length()));
#elif defined(WCHAR_T_IS_UTF32)
wchar_t buffer[64]; // A int64 is less than 20 chars long, so 64 chars
// leaves plenty of room for formating stuff.
int length = 0;
UErrorCode error = U_ZERO_ERROR;
u_strToWCS(buffer, 64, &length, ustr.getBuffer(), ustr.length() , &error);
if (U_FAILURE(error)) {
NOTREACHED();
// As a fallback, just return the raw number in a string.
return StringPrintf(L"%lld", number);
}
return std::wstring(buffer, static_cast<std::wstring::size_type>(length));
#endif // defined(WCHAR_T_IS_UTF32)
}
// Although this function isn't specific to ICU, we implemented it here so
// that chrome.exe won't pull it in. Moving this function to string_util.cc
// causes chrome.exe to grow by 400k because of more ICU being pulled in.
TrimPositions TrimWhitespaceUTF8(const std::string& input,
TrimPositions positions,
std::string* output) {
// This implementation is not so fast since it converts the text encoding
// twice. Please feel free to file a bug if this function hurts the
// performance of Chrome.
DCHECK(IsStringUTF8(input));
std::wstring input_wide = UTF8ToWide(input);
std::wstring output_wide;
TrimPositions result = TrimWhitespace(input_wide, positions, &output_wide);
*output = WideToUTF8(output_wide);
return result;
}
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