diff options
Diffstat (limited to 'parameter/FixedPointParameterType.cpp')
| -rw-r--r-- | parameter/FixedPointParameterType.cpp | 26 |
1 files changed, 3 insertions, 23 deletions
diff --git a/parameter/FixedPointParameterType.cpp b/parameter/FixedPointParameterType.cpp index 067f311..33d79e1 100644 --- a/parameter/FixedPointParameterType.cpp +++ b/parameter/FixedPointParameterType.cpp @@ -147,7 +147,8 @@ void CFixedPointParameterType::setOutOfRangeError(const string& strValue, CParam double dMax = 0; getRange(dMin, dMax); - strStream << "real range [" << dMin << ", " << dMax << "]"; + strStream << fixed << setprecision(_uiFractional) + << "real range [" << dMin << ", " << dMax << "]"; } else { // Min/Max computation @@ -209,28 +210,7 @@ bool CFixedPointParameterType::fromBlackboard(string& strValue, const uint32_t& // Conversion double dData = asDouble(iData); - // Set up the precision of the display and notation type - // For a Qn.m number, the step between each storable number is 2^(-m). - // Hence, on a decimal representation, the Dth digit after the decimal - // point can take all possible values (1..9) - meaning that it is - // significant - only if - // - // 2^(-m) <= 10^(-D) - // -m <= log2(10^(-D)) - // -m <= log10(10^(-D)) / log10(2) - // -m <= -D / log10(2) - // m * log10(2) >= D - // - // Conversly, the Dth digit can be represented if - // - // D <= m * log10(2) - // - // Since floor(x) <= x, we can write (replacing D with iPrecision and m - // with _uiFractional) this next line. - // (we add 1 to avoid losing precision even though this last digit is - // not 100% significant) - int iPrecision = (_uiFractional * log10(2.0)) + 1; - strStream << fixed << setprecision(iPrecision) << dData; + strStream << fixed << setprecision(_uiFractional) << dData; } strValue = strStream.str(); |