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ircd::util: Add a format option for pretty_nanoseconds() et al for abbreviated units.

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This commit is contained in:
Jason Volk 2018-12-30 13:38:14 -08:00
parent ba7ad88d7a
commit 43a354da49
2 changed files with 24 additions and 20 deletions
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18
include/ircd/util/pretty.h
View file

@ -37,20 +37,21 @@ namespace ircd::util
std::string pretty_only(const human_readable_size &);
// Human readable time suite (for timers and counts; otherwise see date.h)
string_view pretty_nanoseconds(const mutable_buffer &out, const long double &);
template<class r, class p> string_view pretty(const mutable_buffer &out, const duration<r, p> &);
template<class r, class p> std::string pretty(const duration<r, p> &);
string_view pretty_nanoseconds(const mutable_buffer &out, const long double &, const uint &fmt = 0);
template<class r, class p> string_view pretty(const mutable_buffer &out, const duration<r, p> &, const uint &fmt = 0);
template<class r, class p> std::string pretty(const duration<r, p> &, const uint &fmt = 0);
}
template<class rep,
class period>
std::string
ircd::util::pretty(const duration<rep, period> &d)
ircd::util::pretty(const duration<rep, period> &d,
const uint &fmt)
{
return util::string(32, [&d]
return util::string(32, [&d, &fmt]
(const mutable_buffer &out)
{
return pretty(out, d);
return pretty(out, d, fmt);
});
}
@ -58,8 +59,9 @@ template<class rep,
class period>
ircd::string_view
ircd::util::pretty(const mutable_buffer &out,
const duration<rep, period> &d)
const duration<rep, period> &d,
const uint &fmt)
{
const auto &ns(duration_cast<nanoseconds>(d));
return pretty_nanoseconds(out, ns.count());
return pretty_nanoseconds(out, ns.count(), fmt);
}

26
ircd/util.cc
View file

@ -63,18 +63,20 @@ ircd::util::getenv(const string_view &key)
ircd::string_view
ircd::util::pretty_nanoseconds(const mutable_buffer &out,
const long double &ns)
const long double &ns,
const uint &fmt)
{
static const std::array<string_view, 7> unit
{
"nanoseconds",
"microseconds",
"milliseconds",
"seconds",
"minutes",
"hours",
"days",
};
static const std::array<std::array<string_view, 2>, 7> unit
{{
// fmt=0 fmt=1
{ "nanoseconds", "ns" },
{ "microseconds", "us" },
{ "milliseconds", "ms" },
{ "seconds", "s" },
{ "minutes", "m" },
{ "hours", "h" },
{ "days", "d" },
}};
auto pos(0);
long double val(ns);
@ -132,7 +134,7 @@ ircd::util::pretty_nanoseconds(const mutable_buffer &out,
{
out, "%.2lf %s",
val,
unit.at(pos)
unit.at(pos).at(fmt)
};
}