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Don't generate insignificant digits

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This commit is contained in:
Victor Zverovich 2020-09-12 09:19:50 -07:00
parent 595902f8a0
commit f233b56cdd
1 changed files with 4 additions and 1 deletions
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5
include/fmt/format-inl.h
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@ -1061,7 +1061,10 @@ void fallback_format(Double d, int num_digits, buffer<char>& buf, int& exp10) {
if (upper != &lower) *upper *= 10;
}
}
// Generate the given number of digits.
// Generate the given number of digits up to the maximum possible number of
// significant digits in a IEEE754 double.
const int max_double_digits = 767;
if (num_digits > max_double_digits) num_digits = max_double_digits;
exp10 -= num_digits - 1;
if (num_digits == 0) {
buf.try_resize(1);