| /* |
| * Copyright (C) 2003-2019 Apple Inc. All rights reserved. |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Library General Public |
| * License as published by the Free Software Foundation; either |
| * version 2 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Library General Public License for more details. |
| * |
| * You should have received a copy of the GNU Library General Public License |
| * along with this library; see the file COPYING.LIB. If not, write to |
| * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| * Boston, MA 02110-1301, USA. |
| * |
| */ |
| |
| #pragma once |
| |
| #include <array> |
| #include <wtf/ASCIICType.h> |
| #include <wtf/dtoa/double-conversion.h> |
| #include <wtf/text/StringView.h> |
| |
| namespace WTF { |
| |
| // Only toFixed() can use all the 124 positions. The format is: |
| // <-> + <21 digits> + decimal point + <100 digits> + null char = 124. |
| using NumberToStringBuffer = std::array<char, 124>; |
| |
| |
| // <-> + <320 digits> + decimal point + <6 digits> + null char = 329 |
| using NumberToCSSStringBuffer = std::array<char, 329>; |
| |
| WTF_EXPORT_PRIVATE const char* numberToString(float, NumberToStringBuffer&); |
| WTF_EXPORT_PRIVATE const char* numberToFixedPrecisionString(float, unsigned significantFigures, NumberToStringBuffer&, bool truncateTrailingZeros = false); |
| WTF_EXPORT_PRIVATE const char* numberToFixedWidthString(float, unsigned decimalPlaces, NumberToStringBuffer&); |
| |
| WTF_EXPORT_PRIVATE const char* numberToString(double, NumberToStringBuffer&); |
| WTF_EXPORT_PRIVATE const char* numberToFixedPrecisionString(double, unsigned significantFigures, NumberToStringBuffer&, bool truncateTrailingZeros = false); |
| WTF_EXPORT_PRIVATE const char* numberToFixedWidthString(double, unsigned decimalPlaces, NumberToStringBuffer&); |
| |
| // Fixed width with up to 6 decimal places, trailing zeros truncated. |
| WTF_EXPORT_PRIVATE const char* numberToCSSString(double, NumberToCSSStringBuffer&); |
| |
| double parseDouble(const LChar* string, size_t length, size_t& parsedLength); |
| double parseDouble(const UChar* string, size_t length, size_t& parsedLength); |
| double parseDouble(StringView, size_t& parsedLength); |
| |
| namespace Internal { |
| WTF_EXPORT_PRIVATE double parseDoubleFromLongString(const UChar* string, size_t length, size_t& parsedLength); |
| } |
| |
| inline double parseDouble(const LChar* string, size_t length, size_t& parsedLength) |
| { |
| return double_conversion::StringToDoubleConverter::StringToDouble(reinterpret_cast<const char*>(string), length, &parsedLength); |
| } |
| |
| inline double parseDouble(const UChar* string, size_t length, size_t& parsedLength) |
| { |
| const size_t conversionBufferSize = 64; |
| if (length > conversionBufferSize) |
| return Internal::parseDoubleFromLongString(string, length, parsedLength); |
| LChar conversionBuffer[conversionBufferSize]; |
| for (int i = 0; i < static_cast<int>(length); ++i) |
| conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0; |
| return parseDouble(conversionBuffer, length, parsedLength); |
| } |
| |
| inline double parseDouble(StringView string, size_t& parsedLength) |
| { |
| if (string.is8Bit()) |
| return parseDouble(string.characters8(), string.length(), parsedLength); |
| return parseDouble(string.characters16(), string.length(), parsedLength); |
| } |
| |
| } // namespace WTF |
| |
| using WTF::NumberToStringBuffer; |
| using WTF::numberToString; |
| using WTF::numberToFixedPrecisionString; |
| using WTF::numberToFixedWidthString; |
| using WTF::parseDouble; |