diff options
Diffstat (limited to 'sal')
| -rw-r--r-- | sal/rtl/math.cxx | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sal/rtl/math.cxx b/sal/rtl/math.cxx index 997280784351..96c5843dcfea 100644 --- a/sal/rtl/math.cxx +++ b/sal/rtl/math.cxx @@ -34,6 +34,7 @@ #include <algorithm> #include <cassert> #include <float.h> +#include <limits> #include <limits.h> #include <math.h> #include <stdlib.h> @@ -365,8 +366,15 @@ inline void doubleToString(typename T::String ** pResult, int nExp = 0; if ( fValue > 0.0 ) { - nExp = static_cast< int >(floor(log10(fValue))); - fValue /= getN10Exp(nExp); + // Cap nExp at a small value beyond which "fValue /= N10Exp" would lose precision (or N10Exp + // might even be zero); that will produce output with the decimal point in a non-normalized + // position, but the current quality of output for such small values is probably abysmal, + // anyway: + nExp = std::max( + static_cast< int >(floor(log10(fValue))), std::numeric_limits<double>::min_exponent10); + double const N10Exp = getN10Exp(nExp); + assert(N10Exp != 0); + fValue /= N10Exp; } switch (eFormat) |