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Separate nonfinite formatting

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This commit is contained in:
Victor Zverovich
2020-05-06 07:19:37 -07:00
parent d6cea50d01
commit b0f47a13e6
1 changed files with 17 additions and 9 deletions
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26
include/fmt/format.h
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@@ -1561,6 +1561,22 @@ template <typename OutputIt, typename Char, typename UInt> struct int_writer {
} }
}; };
template <typename Char, typename OutputIt>
OutputIt write_nonfinite(OutputIt out, bool isinf,
const basic_format_specs<Char>& specs,
const float_specs& fspecs) {
auto str =
isinf ? (fspecs.upper ? "INF" : "inf") : (fspecs.upper ? "NAN" : "nan");
constexpr size_t str_size = 3;
auto sign = fspecs.sign;
auto size = str_size + (sign ? 1 : 0);
using iterator = remove_reference_t<decltype(reserve(out, 0))>;
return write_padded(out, specs, size, [=](iterator it) {
if (sign) *it++ = static_cast<Char>(data::signs[sign]);
return copy_str<Char>(str, str + str_size, it);
});
}
template <typename Char, typename OutputIt, typename UIntPtr> template <typename Char, typename OutputIt, typename UIntPtr>
OutputIt write_ptr(OutputIt out, UIntPtr value, OutputIt write_ptr(OutputIt out, UIntPtr value,
const basic_format_specs<Char>* specs) { const basic_format_specs<Char>* specs) {
@@ -1648,15 +1664,7 @@ template <typename Range> class basic_writer {
} }
if (!std::isfinite(value)) { if (!std::isfinite(value)) {
auto str = std::isinf(value) ? (fspecs.upper ? "INF" : "inf") out_ = write_nonfinite(out_, std::isinf(value), specs, fspecs);
: (fspecs.upper ? "NAN" : "nan");
constexpr size_t str_size = 3;
auto sign = fspecs.sign;
auto size = str_size + (sign ? 1 : 0);
out_ = write_padded(out_, specs, size, [=](reserve_iterator it) {
if (sign) *it++ = static_cast<char_type>(data::signs[sign]);
return copy_str<char_type>(str, str + str_size, it);
});
return; return;
} }