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ircd::util: Simplify tool.

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This commit is contained in:
Jason Volk 2019-08-20 20:10:25 -07:00
parent fd953d4b10
commit 27d394ebfa
1 changed files with 17 additions and 78 deletions
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95
ircd/util.cc
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@ -194,18 +194,20 @@ ircd::util::pretty_nanoseconds(const mutable_buffer &out,
const long double &ns,
const uint &fmt)
{
static const std::array<std::array<string_view, 2>, 9> unit
using formats = std::array<string_view, 2>;
using element = std::tuple<formats, double>;
static const std::array<element, 9> unit
{{
// fmt=0 fmt=1
{ "nanoseconds", "ns" },
{ "microseconds", "us" },
{ "milliseconds", "ms" },
{ "seconds", "s" },
{ "minutes", "m" },
{ "hours", "h" },
{ "days", "d" },
{ "weeks", "w" },
{ "months", "M" },
// fmt=0 fmt=1
{ { "nanoseconds", "ns" }, 1000.0 },
{ { "microseconds", "us" }, 1000.0 },
{ { "milliseconds", "ms" }, 1000.0 },
{ { "seconds", "s" }, 60.0 },
{ { "minutes", "m" }, 60.0 },
{ { "hours", "h" }, 24.0 },
{ { "days", "d" }, 7.0 },
{ { "weeks", "w" }, 30.0 },
{ { "months", "M" }, 12.0 },
}};
const string_view &fmtstr
@ -215,77 +217,14 @@ ircd::util::pretty_nanoseconds(const mutable_buffer &out,
"%.2lf %s"_sv
};
auto pos(0);
size_t i(0), pos(0);
long double val(ns);
for(; val > std::get<1>(unit.at(pos)); ++pos)
val /= std::get<1>(unit.at(pos));
// nanoseconds -> microseconds
if(val > 1000.0)
{
val /= 1000;
++pos;
}
else goto done;
// microseconds -> milliseconds
if(val > 1000.0)
{
val /= 1000;
++pos;
}
else goto done;
// milliseconds -> seconds
if(val > 1000.0)
{
val /= 1000;
++pos;
}
else goto done;
// seconds -> minutes
if(val > 60.0)
{
val /= 60;
++pos;
}
else goto done;
// minutes -> hours
if(val > 60.0)
{
val /= 60;
++pos;
}
else goto done;
// hours -> days
if(val > 24.0)
{
val /= 24;
++pos;
}
else goto done;
// days -> weeks
if(val > 7.0)
{
val /= 7;
++pos;
}
else goto done;
// weeks -> months
if(val > 30.0)
{
val /= 30;
++pos;
}
else goto done;
done:
return fmt::sprintf
{
out, fmtstr, val, unit.at(pos).at(fmt)
out, fmtstr, val, std::get<0>(unit.at(pos)).at(fmt)
};
}