Ignore:
Timestamp:
11/25/18 20:13:18 (18 months ago)
Author:
Maciej Komosinski
Message:

Used the Dragon4 algorithm to print floating point values with full precision instead of "%.17g"

File:
1 edited

Legend:

Unmodified
Added
Removed
  • cpp/frams/util/sstring.cpp

    r793 r826  
    2323#include "extvalue.h"
    2424#include <assert.h>
     25#ifdef USE_PRINTFLOAT_DRAGON4
     26#include <PrintFloat/PrintFloat.h>
     27#endif
    2528
    2629#ifdef MULTITHREADED
     
    363366SString SString::valueOf(double d)
    364367{
    365         SString tmp = SString::sprintf("%.15g", d);
     368#ifdef USE_PRINTFLOAT_DRAGON4
     369        SString tmp;
     370        char* here=tmp.directWrite(30);
     371        tmp.endWrite(PrintFloat64(here,30,d,
     372                                  ((d<-1e17)||(d>1e17)||((d<1e-4)&&(d>-1e-4)&&(d!=0.0)))
     373                                  ? PrintFloatFormat_Scientific : PrintFloatFormat_Positional,
     374                                  -1));//http://www.ryanjuckett.com/programming/printing-floating-point-numbers/
     375#else
     376        SString tmp = SString::sprintf("%.17g", d); //https://stackoverflow.com/questions/16839658/printf-width-specifier-to-maintain-precision-of-floating-point-value
     377#endif
    366378        if ((!strchr(tmp.c_str(), '.')) && (!strchr(tmp.c_str(), 'e'))) tmp += ".0";
    367379        return tmp;
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