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address the double to json format accounting for integer side number of digits

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This commit is contained in:
Stefano Fiorentino 2016-02-12 11:28:50 +01:00
parent b4d2b65841
commit a89dec25ad
1 changed files with 4 additions and 1 deletions
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5
src/lib_json/json_writer.cpp
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@ -141,8 +141,11 @@ std::string valueToString(double value, bool useSpecialFloats, unsigned int prec
char buffer[32]; char buffer[32];
int len = -1; int len = -1;
int length = (value==0.0)?1:(int)(std::floor(std::log10(std::abs(value)))+1);
if (length<1) length=1;
char formatString[6]; char formatString[6];
sprintf(formatString, "%%.%dg", precision); sprintf(formatString, "%%.%dg", precision-length);
// Print into the buffer. We need not request the alternative representation // Print into the buffer. We need not request the alternative representation
// that always has a decimal point because JSON doesn't distingish the // that always has a decimal point because JSON doesn't distingish the