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  1. Qt
  2. QTBUG-74325

QByteArray::toDouble() and qstrtod() function does not correctly parse the uppercase NaN

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Details

    • Bug
    • Resolution: Fixed
    • P2: Important
    • 6.5.0
    • 5.12.0
    • Core: QString and Unicode
    • None
    • Windows
    • 2ea3d2e924151843b8348871232eb88afb4cfe40 (qtbase/dev), a67e7e3bb (dev)

    Description

      All of these functions should return NaN, but QByteArray::toDouble() and qstrtod() returns 0.

      double dbl1 = QString::fromLatin1("NaN").toDouble(&ok);         // dbl1 = NaN, ok = true
double dbl2 = QByteArray::fromRawData("NaN", 3).toDouble(&ok);  // dbl2 = 0, ok = false
double dbl3 = qstrtod("NaN", nullptr, &ok);                     // dbl3 = 0, ok = false
double dbl4 = strtod("NaN", nullptr);                           // dbl4 = NaN

      For lowercase "nan" all functions returns NaN, which is OK.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-66466 QString::toDouble() doesn't parse -/+Infinity

          • Not Evaluated - Not yet evaluated/prioritized
          • Closed
          For Gerrit Dashboard: QTBUG-74325
          # Subject Branch Project Status CR V
          454783,1 QLocale: add unittests for qstrtod of "NaN" and "nan" 6.5 qt/qtbase Status: NEW 0 0
          454560,2 QLocale: add unittests for qstrtod of "NaN" and "nan" dev qt/qtbase Status: MERGED +2 0

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              thiago Thiago Macieira
              amiart Robert Szefner
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              Dates

                Created:
                Updated:
                Resolved:

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