68 lines
1.3 KiB
C++
68 lines
1.3 KiB
C++
#include "usagefmt.hpp"
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namespace {
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constexpr qreal kKib = 1024.0;
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constexpr qreal kMib = kKib * 1024.0;
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constexpr qreal kGib = kMib * 1024.0;
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bool finitePositive(qreal v) {
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return std::isfinite(v) && v >= 0.0;
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}
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} // namespace
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namespace ZShell::services::usagefmt {
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FormatResult UsageFmt::formatKib(qreal kib) const {
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if (!finitePositive(kib)) {
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return {0.0, 0.0, "KiB"};
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}
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if (kib >= kGib) {
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return {kib / kGib, 0.0, "GiB"};
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}
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if (kib >= kMib) {
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return {kib / kMib, 0.0, "MiB"};
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}
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if (kib >= kKib) {
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return {kib / kKib, 0.0, "KiB"};
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}
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return {kib, 0.0, "KiB"};
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}
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FormatResult UsageFmt::formatKib(qreal kib, qreal total) const {
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if (!finitePositive(kib) || !finitePositive(total)) {
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return {0.0, 0.0, "KiB"};
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}
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if (total >= kGib) {
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return {kib / kGib, total / kGib, "TiB"};
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}
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if (total >= kMib) {
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return {kib / kMib, total / kMib, "GiB"};
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}
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if (total >= kKib) {
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return {kib / kKib, total / kKib, "MiB"};
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}
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return {kib, total, "KiB"};
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}
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FormatResult UsageFmt::formatBytes(qreal bytes) const {
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static constexpr std::array<const char*, 5> units = {
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"B", "KB", "MB", "GB", "TB"};
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qreal value = finitePositive(bytes) ? bytes : 0.0;
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const qreal k = 1024.0;
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std::size_t i = 0;
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while (value >= k && i < units.size() - 1) {
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value /= k;
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i++;
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}
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return {value, 0.0, units[i]};
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}
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} // namespace ZShell::services::usagefmt
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