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Use grisu for fixed precision

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This commit is contained in:
Victor Zverovich
2019-02-23 06:42:45 -10:00
parent 327d4b6e9e
commit a97757736b
4 changed files with 17 additions and 10 deletions
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8
include/fmt/format.h
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@@ -1139,10 +1139,10 @@ namespace internal {
// https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf
template <typename Double>
FMT_API typename std::enable_if<sizeof(Double) == sizeof(uint64_t), bool>::type
grisu2_format(Double value, buffer& buf, int precision, int& exp);
grisu2_format(Double value, buffer& buf, int precision, bool fixed, int& exp);
template <typename Double>
inline typename std::enable_if<sizeof(Double) != sizeof(uint64_t), bool>::type
grisu2_format(Double, buffer&, int, int&) {
grisu2_format(Double, buffer&, int, bool, int&) {
return false;
}
@@ -2866,9 +2866,9 @@ void basic_writer<Range>::write_double(T value, const format_specs& spec) {
int exp = 0;
int precision = spec.has_precision() || !spec.type ? spec.precision : 6;
bool use_grisu = fmt::internal::use_grisu<T>() &&
(!spec.type || handler.fixed) && !spec.has_precision() &&
(!spec.type || handler.fixed) &&
internal::grisu2_format(static_cast<double>(value), buffer,
precision, exp);
precision, handler.fixed, exp);
if (!use_grisu) internal::sprintf_format(value, buffer, spec);
align_spec as = spec;
if (spec.align() == ALIGN_NUMERIC) {