diff options
Diffstat (limited to 'svl/source/numbers/zformat.cxx')
| -rw-r--r-- | svl/source/numbers/zformat.cxx | 180 |
1 files changed, 147 insertions, 33 deletions
diff --git a/svl/source/numbers/zformat.cxx b/svl/source/numbers/zformat.cxx index 32c65b06d2f1..707b2362f0ed 100644 --- a/svl/source/numbers/zformat.cxx +++ b/svl/source/numbers/zformat.cxx @@ -54,6 +54,9 @@ #include "numhead.hxx" #include <unotools/digitgroupingiterator.hxx> #include "nfsymbol.hxx" + +#include <cmath> + using namespace svt; namespace { @@ -63,6 +66,10 @@ struct Gregorian return ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("gregorian")); } }; + +const sal_uInt16 UPPER_PRECISION = 300; // entirely arbitrary... +const double EXP_LOWER_BOUND = 1.0E-4; // prefer scientific notation below this value. + } const double _D_MAX_U_LONG_ = (double) 0xffffffff; // 4294967295.0 @@ -1774,47 +1781,62 @@ void SvNumberformat::Build50Formatstring( String& rStr ) const void SvNumberformat::ImpGetOutputStandard(double& fNumber, String& OutString) { - USHORT nStandardPrec = rScan.GetStandardPrec(); + sal_uInt16 nStandardPrec = rScan.GetStandardPrec(); + if ( fabs(fNumber) > 1.0E15 ) // #58531# war E16 + { + nStandardPrec = ::std::min(nStandardPrec, static_cast<sal_uInt16>(14)); // limits to 14 decimals OutString = ::rtl::math::doubleToUString( fNumber, rtl_math_StringFormat_E, nStandardPrec /*2*/, GetFormatter().GetNumDecimalSep().GetChar(0)); + } else - { + ImpGetOutputStdToPrecision(fNumber, OutString, nStandardPrec); +} + +void SvNumberformat::ImpGetOutputStdToPrecision(double& rNumber, String& rOutString, sal_uInt16 nPrecision) const +{ + // Make sure the precision doesn't go over the maximum allowable precision. + nPrecision = ::std::min(UPPER_PRECISION, nPrecision); + #if 0 { - // debugger test case for ANSI standard correctness - ::rtl::OUString aTest; - // expect 0.00123 OK - aTest = ::rtl::math::doubleToUString( 0.001234567, - rtl_math_StringFormat_G, 3, '.', sal_True ); - // expect 123 OK - aTest = ::rtl::math::doubleToUString( 123.4567, - rtl_math_StringFormat_G, 3, '.', sal_True ); - // expect 123.5 OK - aTest = ::rtl::math::doubleToUString( 123.4567, - rtl_math_StringFormat_G, 4, '.', sal_True ); - // expect 1e+03 (as 999.6 rounded to 3 significant digits results in - // 1000 with an exponent equal to significant digits) - // Currently (24-Jan-2003) we do fail in this case and output 1000 - // instead, negligible. - aTest = ::rtl::math::doubleToUString( 999.6, - rtl_math_StringFormat_G, 3, '.', sal_True ); - // expect what? result is 1.2e+004 - aTest = ::rtl::math::doubleToUString( 12345.6789, - rtl_math_StringFormat_G, -3, '.', sal_True ); + // debugger test case for ANSI standard correctness + ::rtl::OUString aTest; + // expect 0.00123 OK + aTest = ::rtl::math::doubleToUString( 0.001234567, + rtl_math_StringFormat_G, 3, '.', sal_True ); + // expect 123 OK + aTest = ::rtl::math::doubleToUString( 123.4567, + rtl_math_StringFormat_G, 3, '.', sal_True ); + // expect 123.5 OK + aTest = ::rtl::math::doubleToUString( 123.4567, + rtl_math_StringFormat_G, 4, '.', sal_True ); + // expect 1e+03 (as 999.6 rounded to 3 significant digits results in + // 1000 with an exponent equal to significant digits) + // Currently (24-Jan-2003) we do fail in this case and output 1000 + // instead, negligible. + aTest = ::rtl::math::doubleToUString( 999.6, + rtl_math_StringFormat_G, 3, '.', sal_True ); + // expect what? result is 1.2e+004 + aTest = ::rtl::math::doubleToUString( 12345.6789, + rtl_math_StringFormat_G, -3, '.', sal_True ); } #endif - OutString = ::rtl::math::doubleToUString( fNumber, - rtl_math_StringFormat_F, nStandardPrec /*2*/, - GetFormatter().GetNumDecimalSep().GetChar(0), sal_True ); - if (OutString.GetChar(0) == '-' && - OutString.GetTokenCount('0') == OutString.Len()) - OutString.EraseLeadingChars('-'); // nicht -0 - } - ImpTransliterate( OutString, NumFor[0].GetNatNum() ); - return; + // We decided to strip trailing zeros unconditionally, since binary + // double-precision rounding error makes it impossible to determine e.g. + // whether 844.10000000000002273737 is what the user has typed, or the + // user has typed 844.1 but IEEE 754 represents it that way internally. + + rOutString = ::rtl::math::doubleToUString( rNumber, + rtl_math_StringFormat_F, nPrecision /*2*/, + GetFormatter().GetNumDecimalSep().GetChar(0), true ); + if (rOutString.GetChar(0) == '-' && + rOutString.GetTokenCount('0') == rOutString.Len()) + rOutString.EraseLeadingChars('-'); // nicht -0 + + ImpTransliterate( rOutString, NumFor[0].GetNatNum() ); } void SvNumberformat::ImpGetOutputInputLine(double fNumber, String& OutString) @@ -1955,6 +1977,71 @@ ULONG SvNumberformat::ImpGGTRound(ULONG x, ULONG y) } } +namespace { + +void lcl_GetOutputStringScientific( + double fNumber, sal_uInt16 nCharCount, const SvNumberFormatter& rFormatter, String& rOutString) +{ + bool bSign = ::rtl::math::isSignBitSet(fNumber); + + // 1.000E+015 (one digit and the decimal point, and the five chars for the exponential part, totalling 7). + sal_uInt16 nPrec = nCharCount > 7 ? nCharCount - 7 : 0; + if (nPrec && bSign) + // Make room for the negative sign. + --nPrec; + + nPrec = ::std::min(nPrec, static_cast<sal_uInt16>(14)); // limit to 14 decimals. + + rOutString = ::rtl::math::doubleToUString( + fNumber, rtl_math_StringFormat_E, nPrec, rFormatter.GetNumDecimalSep().GetChar(0)); +} + +} + +bool SvNumberformat::GetOutputString(double fNumber, sal_uInt16 nCharCount, String& rOutString) const +{ + using namespace std; + + if (eType != NUMBERFORMAT_NUMBER) + return false; + + double fTestNum = fNumber; + bool bSign = ::rtl::math::isSignBitSet(fTestNum); + if (bSign) + fTestNum = -fTestNum; + + if (fTestNum < EXP_LOWER_BOUND) + { + lcl_GetOutputStringScientific(fNumber, nCharCount, GetFormatter(), rOutString); + return true; + } + + double fExp = log10(fTestNum); + // Values < 1.0 always have one digit before the decimal point. + sal_uInt16 nDigitPre = fExp >= 0.0 ? static_cast<sal_uInt16>(ceil(fExp)) : 1; + + if (nDigitPre > 15) + { + lcl_GetOutputStringScientific(fNumber, nCharCount, GetFormatter(), rOutString); + return true; + } + + sal_uInt16 nPrec = nCharCount >= nDigitPre ? nCharCount - nDigitPre : 0; + if (nPrec && bSign) + // Subtract the negative sign. + --nPrec; + if (nPrec) + // Subtract the decimal point. + --nPrec; + + ImpGetOutputStdToPrecision(fNumber, rOutString, nPrec); + if (rOutString.Len() > nCharCount) + // String still wider than desired. Switch to scientific notation. + lcl_GetOutputStringScientific(fNumber, nCharCount, GetFormatter(), rOutString); + + return true; +} + BOOL SvNumberformat::GetOutputString(double fNumber, String& OutString, Color** ppColor) @@ -1978,16 +2065,43 @@ BOOL SvNumberformat::GetOutputString(double fNumber, BOOL bHadStandard = FALSE; if (bStandard) // einzelne Standardformate { - if (rScan.GetStandardPrec() == 300) // alle Zahlformate InputLine + if (rScan.GetStandardPrec() == SvNumberFormatter::INPUTSTRING_PRECISION) // alle Zahlformate InputLine { ImpGetOutputInputLine(fNumber, OutString); - return FALSE; + return false; } switch (eType) { case NUMBERFORMAT_NUMBER: // Standardzahlformat + { + if (rScan.GetStandardPrec() == SvNumberFormatter::UNLIMITED_PRECISION) + { + bool bSign = ::rtl::math::isSignBitSet(fNumber); + if (bSign) + fNumber = -fNumber; + ImpGetOutputStdToPrecision(fNumber, OutString, 10); // Use 10 decimals for general 'unlimited' format. + if (fNumber < EXP_LOWER_BOUND) + { + xub_StrLen nLen = OutString.Len(); + if (!nLen) + return false; + + if (nLen > 11) + { + sal_uInt16 nStandardPrec = rScan.GetStandardPrec(); + nStandardPrec = ::std::min(nStandardPrec, static_cast<sal_uInt16>(14)); // limits to 14 decimals + OutString = ::rtl::math::doubleToUString( fNumber, + rtl_math_StringFormat_E, nStandardPrec /*2*/, + GetFormatter().GetNumDecimalSep().GetChar(0), true); + } + } + if (bSign) + OutString.Insert('-', 0); + return false; + } ImpGetOutputStandard(fNumber, OutString); bHadStandard = TRUE; + } break; case NUMBERFORMAT_DATE: bRes |= ImpGetDateOutput(fNumber, 0, OutString); |