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/**
* Copyright (c) 2019, Timothy Stack
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of Timothy Stack nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ''AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <cmath>
#include <vector>
#include "humanize.hh"
#include "config.h"
#include "fmt/format.h"
namespace humanize {
std::string
file_size(file_ssize_t value, alignment align)
{
static const double LN1024 = log(1024.0);
static const std::vector<const char*> UNITS = {
" ",
"K",
"M",
"G",
"T",
"P",
"E",
};
if (value < 0) {
return "Unknown";
}
if (value == 0) {
switch (align) {
case alignment::none:
return "0B";
case alignment::columnar:
return "0.0 B";
}
}
auto exp
= floor(std::min(log(value) / LN1024, (double) (UNITS.size() - 1)));
auto divisor = pow(1024, exp);
if (align == alignment::none && divisor <= 1) {
return fmt::format(FMT_STRING("{}B"), value, UNITS[exp]);
}
return fmt::format(FMT_STRING("{:.1f}{}B"),
divisor == 0 ? value : value / divisor,
UNITS[exp]);
}
const std::string&
sparkline(double value, nonstd::optional<double> upper_opt)
{
static const std::string ZERO = " ";
static const std::string BARS[] = {
"\u2581",
"\u2582",
"\u2583",
"\u2584",
"\u2585",
"\u2586",
"\u2587",
"\u2588",
};
static const double BARS_COUNT = std::distance(begin(BARS), end(BARS));
if (value <= 0.0) {
return ZERO;
}
auto upper = upper_opt.value_or(100.0);
if (value >= upper) {
return BARS[(size_t) BARS_COUNT - 1];
}
size_t index = ceil((value / upper) * BARS_COUNT) - 1;
return BARS[index];
}
} // namespace humanize
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