double
DigitList::getDouble() /*const*/
{
double value;
if (fCount == 0) {
value = 0.0;
}
else {
char* end = NULL;
if (!gDecimal) {
char rep[MAX_DIGITS];
// For machines that decide to change the decimal on you,
// and try to be too smart with localization.
// This normally should be just a '.'.
sprintf(rep, "%+1.1f", 1.0);
gDecimal = rep[2];
}
*fDecimalDigits = gDecimal;
*(fDigits+fCount) = 'e'; // add an e after the digits.
formatBase10(fDecimalAt,
fDigits + fCount + 1, // skip the 'e'
MAX_DEC_DIGITS - fCount - 3); // skip the 'e' and '.'
value = uprv_strtod(fDecimalDigits, &end);
}
return fIsPositive ? value : -value;
}
/**
* Set an int64, via decnumber
*/
void
DigitList::set(int64_t source)
{
char str[MAX_DIGITS+2]; // Leave room for sign and trailing nul.
formatBase10(source, str);
U_ASSERT(uprv_strlen(str) < sizeof(str));
uprv_decNumberFromString(fDecNumber, str, &fContext);
internalSetDouble(static_cast<double>(source));
}
// -------------------------------------
void
DigitList::set(int64_t source)
{
char str[MAX_DIGITS+2]; // Leave room for sign and trailing nul.
formatBase10(source, str);
U_ASSERT(uprv_strlen(str) < sizeof(str));
uprv_decNumberFromString(fDecNumber, str, &fContext);
fDouble = (double)source;
fHaveDouble = TRUE;
}
// -------------------------------------
void
DigitList::set(int64_t source, int32_t maximumDigits)
{
fCount = fDecimalAt = formatBase10(source, fDecimalDigits, MAX_DIGITS);
fIsPositive = (*fDecimalDigits == '+');
// Don't copy trailing zeros
while (fCount > 1 && fDigits[fCount - 1] == kZero)
--fCount;
if(maximumDigits > 0)
round(maximumDigits);
}