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Diffstat (limited to 'JavaScriptCore/wtf/DecimalNumber.h')
-rw-r--r-- | JavaScriptCore/wtf/DecimalNumber.h | 108 |
1 files changed, 0 insertions, 108 deletions
diff --git a/JavaScriptCore/wtf/DecimalNumber.h b/JavaScriptCore/wtf/DecimalNumber.h deleted file mode 100644 index c42f00b..0000000 --- a/JavaScriptCore/wtf/DecimalNumber.h +++ /dev/null @@ -1,108 +0,0 @@ -/* - * Copyright (C) 2010 Apple Inc. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY - * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR - * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -#ifndef DecimalNumber_h -#define DecimalNumber_h - -#include <math.h> -#include <wtf/dtoa.h> -#include <wtf/MathExtras.h> -#include <wtf/text/WTFString.h> - -namespace WTF { - -enum RoundingSignificantFiguresType { RoundingSignificantFigures }; -enum RoundingDecimalPlacesType { RoundingDecimalPlaces }; - -class DecimalNumber { -public: - DecimalNumber(double d) - { - ASSERT(!isnan(d) && !isinf(d)); - dtoa(m_significand, d, m_sign, m_exponent, m_precision); - - ASSERT(m_precision); - // Zero should always have exponent 0. - ASSERT(m_significand[0] != '0' || !m_exponent); - // No values other than zero should have a leading zero. - ASSERT(m_significand[0] != '0' || m_precision == 1); - // No values other than zero should have trailing zeros. - ASSERT(m_significand[0] == '0' || m_significand[m_precision - 1] != '0'); - } - - DecimalNumber(double d, RoundingSignificantFiguresType, unsigned significantFigures) - { - ASSERT(!isnan(d) && !isinf(d)); - dtoaRoundSF(m_significand, d, significantFigures, m_sign, m_exponent, m_precision); - - ASSERT(significantFigures && significantFigures <= sizeof(DtoaBuffer)); - while (m_precision < significantFigures) - m_significand[m_precision++] = '0'; - - ASSERT(m_precision); - // Zero should always have exponent 0. - ASSERT(m_significand[0] != '0' || !m_exponent); - } - - DecimalNumber(double d, RoundingDecimalPlacesType, unsigned decimalPlaces) - { - ASSERT(!isnan(d) && !isinf(d)); - dtoaRoundDP(m_significand, d, decimalPlaces, m_sign, m_exponent, m_precision); - - unsigned significantFigures = 1 + m_exponent + decimalPlaces; - ASSERT(significantFigures && significantFigures <= sizeof(DtoaBuffer)); - while (m_precision < significantFigures) - m_significand[m_precision++] = '0'; - - ASSERT(m_precision); - // Zero should always have exponent 0. - ASSERT(m_significand[0] != '0' || !m_exponent); - } - - unsigned bufferLengthForStringDecimal() const; - unsigned bufferLengthForStringExponential() const; - - unsigned toStringDecimal(UChar* buffer, unsigned bufferLength) const; - unsigned toStringExponential(UChar* buffer, unsigned bufferLength) const; - - bool sign() const { return m_sign; } - int exponent() const { return m_exponent; } - const char* significand() const { return m_significand; } // significand contains precision characters, is not null-terminated. - unsigned precision() const { return m_precision; } - -private: - bool m_sign; - int m_exponent; - DtoaBuffer m_significand; - unsigned m_precision; -}; - -} // namespace WTF - -using WTF::DecimalNumber; -using WTF::RoundingSignificantFigures; -using WTF::RoundingDecimalPlaces; - -#endif // DecimalNumber_h |