1 /* 2 * Copyright (C) 2003, 2008, 2012 Apple Inc. All rights reserved. 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Library General Public 6 * License as published by the Free Software Foundation; either 7 * version 2 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Library General Public License for more details. 13 * 14 * You should have received a copy of the GNU Library General Public License 15 * along with this library; see the file COPYING.LIB. If not, write to 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, 17 * Boston, MA 02110-1301, USA. 18 * 19 */ 20 21 #ifndef WTF_dtoa_h 22 #define WTF_dtoa_h 23 24 #include "wtf/ASCIICType.h" 25 #include "wtf/dtoa/double-conversion.h" 26 #include "wtf/unicode/Unicode.h" 27 #include "wtf/WTFExport.h" 28 29 namespace WTF { 30 31 class Mutex; 32 33 extern Mutex* s_dtoaP5Mutex; 34 35 typedef char DtoaBuffer[80]; 36 37 WTF_EXPORT void dtoa(DtoaBuffer result, double dd, bool& sign, int& exponent, unsigned& precision); 38 WTF_EXPORT void dtoaRoundSF(DtoaBuffer result, double dd, int ndigits, bool& sign, int& exponent, unsigned& precision); 39 WTF_EXPORT void dtoaRoundDP(DtoaBuffer result, double dd, int ndigits, bool& sign, int& exponent, unsigned& precision); 40 41 // Size = 80 for sizeof(DtoaBuffer) + some sign bits, decimal point, 'e', exponent digits. 42 const unsigned NumberToStringBufferLength = 96; 43 typedef char NumberToStringBuffer[NumberToStringBufferLength]; 44 typedef LChar NumberToLStringBuffer[NumberToStringBufferLength]; 45 46 WTF_EXPORT const char* numberToString(double, NumberToStringBuffer); 47 WTF_EXPORT const char* numberToFixedPrecisionString(double, unsigned significantFigures, NumberToStringBuffer, bool truncateTrailingZeros = false); 48 WTF_EXPORT const char* numberToFixedWidthString(double, unsigned decimalPlaces, NumberToStringBuffer); 49 50 WTF_EXPORT double parseDouble(const LChar* string, size_t length, size_t& parsedLength); 51 WTF_EXPORT double parseDouble(const UChar* string, size_t length, size_t& parsedLength); 52 53 namespace Internal { 54 double parseDoubleFromLongString(const UChar* string, size_t length, size_t& parsedLength); 55 } 56 57 inline double parseDouble(const LChar* string, size_t length, size_t& parsedLength) 58 { 59 return double_conversion::StringToDoubleConverter::StringToDouble(reinterpret_cast<const char*>(string), length, &parsedLength); 60 } 61 62 inline double parseDouble(const UChar* string, size_t length, size_t& parsedLength) 63 { 64 const size_t conversionBufferSize = 64; 65 if (length > conversionBufferSize) 66 return Internal::parseDoubleFromLongString(string, length, parsedLength); 67 LChar conversionBuffer[conversionBufferSize]; 68 for (int i = 0; i < static_cast<int>(length); ++i) 69 conversionBuffer[i] = isASCII(string[i]) ? string[i] : 0; 70 return parseDouble(conversionBuffer, length, parsedLength); 71 } 72 73 } // namespace WTF 74 75 using WTF::NumberToStringBuffer; 76 using WTF::NumberToLStringBuffer; 77 using WTF::numberToString; 78 using WTF::numberToFixedPrecisionString; 79 using WTF::numberToFixedWidthString; 80 using WTF::parseDouble; 81 82 #endif // WTF_dtoa_h 83
