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Added bx::toHuman. (#370)

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This commit is contained in:
Branimir Karadžić
2026-02-27 07:37:36 -08:00
committed by GitHub
parent 2b946b4668
commit a6168a9d1c
7 changed files with 137 additions and 46 deletions
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56
src/string.cpp
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@@ -1280,7 +1280,7 @@ namespace bx
return total;
}
int32_t formatHumanNumber(char* _out, int32_t _count, double _value, int32_t _numFrac)
int32_t formatHumanNumber(char* _out, uint32_t _count, double _value, uint8_t _numFrac, const StringView& _unit, char _prefix)
{
char temp[64];
int32_t len = snprintf(temp, sizeof(temp), "%.*f", _numFrac, _value);
@@ -1309,7 +1309,7 @@ namespace bx
const int32_t commas = (intPartLen > 3) ? (intPartLen - 1) / 3 : 0;
const int32_t total = intPartLen + fracPartLen + commas;
if (_count < total)
if (_count < uint32_t(total) )
{
if (0 < _count)
{
@@ -1320,7 +1320,15 @@ namespace bx
}
char* out = _out + total;
*out = '\0';
if (_unit.isEmpty()
&& ' ' == _prefix)
{
*out = '\0';
}
else
{
snprintf(out, _count - total, " %c%S", _prefix, &_unit);
}
if (0 != fracPartLen)
{
@@ -1344,39 +1352,41 @@ namespace bx
return total;
}
static const char s_units[] = { 'B', 'k', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y' };
template<uint32_t Kilo, char KiloCh0, char KiloCh1, CharFn fn>
inline int32_t prettify(char* _out, int32_t _count, uint64_t _value)
int32_t formatHumanNumber(char* _out, uint32_t _count, double _value, uint8_t _numFrac, double _unitStep, const StringView& _unit, const StringView& _prefix, uint8_t _basePrefix)
{
uint8_t idx = 0;
uint8_t idx = _basePrefix;
double value = double(_value);
while (_value != (_value&0x7ff)
&& idx < BX_COUNTOF(s_units) )
const double invUnitStep = 1.0/double(_unitStep);
const uint8_t numPrefixes = narrowCast<uint8_t>(_prefix.getLength() );
if (0.0 != _value)
{
_value /= Kilo;
value *= 1.0/double(Kilo);
++idx;
while (value >= _unitStep
&& idx < numPrefixes)
{
value *= invUnitStep;
++idx;
}
while (value < 1.0
&& idx > 0)
{
value *= _unitStep;
--idx;
}
}
char human[32];
formatHumanNumber(human, sizeof(human), value, 2);
return snprintf(_out, _count, "%s %c%c%c", human
, fn(s_units[idx])
, idx > 0 ? KiloCh0 : '\0'
, KiloCh1
);
return formatHumanNumber(_out, _count, value, _numFrac, 0 == idx ? "" : _unit, _prefix.getPtr()[idx]);
}
int32_t prettify(char* _out, int32_t _count, uint64_t _value, Units::Enum _units)
{
if (Units::Kilo == _units)
{
return prettify<1000, 'B', '\0', toNoop>(_out, _count, _value);
return formatHumanNumber(_out, _count, double(_value), 0, 1000.0, "B", "BkMGTPEZY");
}
return prettify<1024, 'i', 'B', toUpper>(_out, _count, _value);
return formatHumanNumber(_out, _count, double(_value), 0, 1024.0, "iB", "BKMGTPEZY");
}
} // namespace bx