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Use integer to_chars if in integer range with general formatting

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This commit is contained in:
Matt Borland
2023-03-27 16:34:44 +02:00
parent 5563d760ef
commit b36dc17e40
1 changed files with 19 additions and 2 deletions
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21
src/to_chars.cpp
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@@ -9,6 +9,7 @@
#include <cstdio>
#include <cstring>
#include <cstdint>
#include <cmath>
namespace boost { namespace charconv { namespace detail {
@@ -292,8 +293,21 @@ boost::charconv::to_chars_result boost::charconv::to_chars(char* first, char* la
if (fmt == boost::charconv::chars_format::general)
{
auto* ptr = jkj::floff::floff<jkj::floff::main_cache_full, jkj::floff::extended_cache_long>(value, std::numeric_limits<double>::max_digits10 - 1, first, fmt);
return { ptr, 0 };
const auto abs_value = std::abs(value);
if (abs_value < 1E17 && abs_value > 1E-17)
{
if (value < 0)
{
*first = '-';
++first;
}
return boost::charconv::to_chars(first, last, static_cast<std::uint64_t>(abs_value));
}
else
{
auto* ptr = jkj::floff::floff<jkj::floff::main_cache_full, jkj::floff::extended_cache_long>(value, std::numeric_limits<double>::max_digits10 - 1, first, fmt);
return { ptr, 0 };
}
}
else if (fmt == boost::charconv::chars_format::scientific)
{
@@ -308,11 +322,14 @@ boost::charconv::to_chars_result boost::charconv::to_chars(char* first, char* la
auto* ptr = jkj::floff::floff<jkj::floff::main_cache_full, jkj::floff::extended_cache_long>(value, precision, first, fmt);
return { ptr, 0 };
}
/*
else
{
std::snprintf( first, last - first, "%.*g", std::numeric_limits<double>::max_digits10, value );
return { first + std::strlen(first), 0 };
}
*/
return { first + std::strlen(first), 0 };
}
boost::charconv::to_chars_result boost::charconv::to_chars( char* first, char* last, long double value ) noexcept