1 /* 2 * Copyright (C) 2011 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "LocalizedNumber.h" 33 34 #include <limits> 35 #include <unicode/numfmt.h> 36 #include <unicode/parsepos.h> 37 #include <wtf/MathExtras.h> 38 #include <wtf/PassOwnPtr.h> 39 40 using namespace icu; 41 using namespace std; 42 43 namespace WebCore { 44 45 static PassOwnPtr<NumberFormat> createFormatterForCurrentLocale() 46 { 47 UErrorCode status = U_ZERO_ERROR; 48 OwnPtr<NumberFormat> formatter = adoptPtr(NumberFormat::createInstance(status)); 49 return U_SUCCESS(status) ? formatter.release() : 0; 50 } 51 52 // This might return 0. 53 static NumberFormat* numberFormatter() 54 { 55 ASSERT(isMainThread()); 56 static NumberFormat* formatter = createFormatterForCurrentLocale().leakPtr(); 57 return formatter; 58 } 59 60 double parseLocalizedNumber(const String& numberString) 61 { 62 if (numberString.isEmpty()) 63 return numeric_limits<double>::quiet_NaN(); 64 NumberFormat* formatter = numberFormatter(); 65 if (!formatter) 66 return numeric_limits<double>::quiet_NaN(); 67 UnicodeString numberUnicodeString(numberString.characters(), numberString.length()); 68 Formattable result; 69 ParsePosition position(0); 70 formatter->parse(numberUnicodeString, result, position); 71 if (position.getIndex() != numberUnicodeString.length()) 72 return numeric_limits<double>::quiet_NaN(); 73 UErrorCode status = U_ZERO_ERROR; 74 double numericResult = result.getDouble(status); 75 return U_SUCCESS(status) ? numericResult : numeric_limits<double>::quiet_NaN(); 76 } 77 78 String formatLocalizedNumber(double number, unsigned fractionDigits) 79 { 80 NumberFormat* formatter = numberFormatter(); 81 if (!formatter) 82 return String(); 83 UnicodeString result; 84 formatter->setMaximumFractionDigits(clampToInteger(fractionDigits)); 85 formatter->format(number, result); 86 return String(result.getBuffer(), result.length()); 87 } 88 89 } // namespace WebCore 90
