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Improved default float printing, added 'R' roundtrip format

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This commit is contained in:
Brian Fiete 2022-05-24 11:17:23 -07:00
parent 1aa42cba8b
commit 470ce96bb9
3 changed files with 121 additions and 56 deletions
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154
BeefRT/rt/Internal.cpp
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@ -179,13 +179,13 @@ namespace bf
struct Float
{
private:
BFRT_EXPORT static int ToString(float f, char* outStr);
BFRT_EXPORT static int ToString(float f, char* outStr, bool roundTrip);
};
struct Double
{
private:
BFRT_EXPORT static int ToString(double f, char* outStr);
BFRT_EXPORT static int ToString(double f, char* outStr, bool roundTrip);
};
}
}
@ -932,54 +932,29 @@ void bf::System::FFI::FFILIB::Call(bf::System::FFI::FFILIB::FFICIF* cif, void* f
//////////////////////////////////////////////////////////////////////////
static int ToString(float d, char* outStr)
static int ToString(float d, char* outStr, bool roundTrip)
{
sprintf(outStr, "%1.9g", d);
int len = (int)strlen(outStr);
for (int i = 0; outStr[i] != 0; i++)
if (!roundTrip)
{
if (outStr[i] == '.')
{
int checkC = len - 1;
while (true)
{
char c = outStr[checkC];
if (c == '.')
{
return checkC;
}
else if (c != '0')
{
for (int j = i + 1; j <= checkC; j++)
if (outStr[j] == 'e')
return len;
return checkC + 1;
}
checkC--;
}
}
}
if ((len == 3) && (outStr[0] == 'i'))
{
strcpy(outStr, "Infinity");
return 8;
}
if ((len == 4) && (outStr[0] == '-') && (outStr[1] == 'i'))
{
strcpy(outStr, "-Infinity");
return 9;
}
if ((len == 9) && (outStr[0] == '-') && (outStr[1] == 'n')) //-nan(xxx)
{
strcpy(outStr, "NaN");
return 3;
}
return len;
}
int digits;
if (d > 100000)
digits = 1;
else if (d > 10000)
digits = 2;
else if (d > 1000)
digits = 3;
else if (d > 100)
digits = 4;
else if (d > 10)
digits = 5;
else
digits = 6;
sprintf(outStr, "%1.*f", digits, d);
}
else
sprintf(outStr, "%1.9g", d);
static int ToString(double d, char* outStr)
{
sprintf(outStr, "%1.17g", d);
int len = (int)strlen(outStr);
for (int i = 0; outStr[i] != 0; i++)
{
@ -1026,22 +1001,99 @@ static int ToString(double d, char* outStr)
return len;
}
int Float::ToString(float f, char* outStr)
static int ToString(double d, char* outStr, bool roundTrip)
{
if (!roundTrip)
{
int digits;
if (d > 1000000000)
digits = 1;
else if (d > 100000000)
digits = 2;
else if (d > 10000000)
digits = 3;
else if (d > 1000000)
digits = 4;
else if (d > 100000)
digits = 5;
else if (d > 10000)
digits = 6;
else if (d > 1000)
digits = 7;
else if (d > 100)
digits = 8;
else if (d > 10)
digits = 9;
else
digits = 10;
sprintf(outStr, "%1.*f", digits, d);
}
else
sprintf(outStr, "%1.17g", d);
int len = (int)strlen(outStr);
for (int i = 0; outStr[i] != 0; i++)
{
if (outStr[i] == '.')
{
int checkC = len - 1;
while (true)
{
char c = outStr[checkC];
if (c == '.')
{
return checkC;
}
else if (c == 'e')
{
return len;
}
else if (c != '0')
{
for (int j = i + 1; j <= checkC; j++)
if (outStr[j] == 'e')
return len;
return checkC + 1;
}
checkC--;
}
}
}
if ((len == 3) && (outStr[0] == 'i'))
{
strcpy(outStr, "Infinity");
return 8;
}
if ((len == 4) && (outStr[0] == '-') && (outStr[1] == 'i'))
{
strcpy(outStr, "-Infinity");
return 9;
}
if ((len == 9) && (outStr[0] == '-') && (outStr[1] == 'n')) //-nan(xxx)
{
strcpy(outStr, "NaN");
return 3;
}
return len;
}
int Float::ToString(float f, char* outStr, bool roundTrip)
{
#ifdef USE_CHARCONV
auto result = std::to_chars(outStr, outStr + 256, f);
return (int)(result.ptr - outStr);
#else
return ::ToString(f, outStr);
return ::ToString(f, outStr, roundTrip);
#endif
}
int Double::ToString(double d, char* outStr)
int Double::ToString(double d, char* outStr, bool roundTrip)
{
#ifdef USE_CHARCONV
auto result = std::to_chars(outStr, outStr + 256, d);
return (int)(result.ptr - outStr);
#else
return ::ToString(d, outStr);
return ::ToString(d, outStr, roundTrip);
#endif
}