57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
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#include "HumanReadableBytes.h"
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#include <iomanip>
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#include <sstream>
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using namespace std;
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namespace {
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struct scale {
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int64_t scale;
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const char* prefix;
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};
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void fmt(std::ostringstream &o, double d)
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{
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;
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if (d < 10.0)
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{
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o << fixed << setprecision(2) << d;
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//return std::format("{:.3g}", d);
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}
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else if (d < 100.0)
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{
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o << fixed << setprecision(1) << d;
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//return std::format("{:.3g}", d);
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}
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else
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{
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o << fixed << setprecision(0) << d;
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}
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}
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}
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std::string HumanReadableBytes(uint64_t bytes)
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{
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static scale scales[] = {
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{ 1024ll * 1024 * 1024 * 1024, "Ti" },
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{ 1024ll * 1024 * 1024, "Gi" },
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{ 1024ll * 1024, "Mi" },
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{ 1024ll, "ki" },
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};
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std::ostringstream out;
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for (int i = 0; i < (sizeof(scales) / sizeof(scale)); ++i)
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{
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if (bytes >= scales[i].scale)
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{
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fmt(out, bytes / double(scales[i].scale));
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out << " " << scales[i].prefix << "B";
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return out.str();
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}
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}
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out << bytes << " B";
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return out.str();
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}
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