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#include <Common/VersionNumber.h>
#include <IO/ReadBufferFromString.h>
#include <IO/ReadHelpers.h>
namespace DB
{
VersionNumber::VersionNumber(std::string version_string)
{
if (version_string.empty())
return;
ReadBufferFromString rb(version_string);
while (!rb.eof())
{
Int64 value;
if (!tryReadIntText(value, rb))
break;
components.push_back(value);
if (!checkChar('.', rb))
break;
}
}
std::string VersionNumber::toString() const
{
return fmt::format("{}", fmt::join(components, "."));
}
int VersionNumber::compare(const VersionNumber & rhs) const
{
size_t min = std::min(components.size(), rhs.components.size());
for (size_t i = 0; i < min; ++i)
{
if (auto d = components[i] - rhs.components[i])
return d > 0 ? 1 : -1;
}
if (components.size() > min)
{
return components[min] >= 0 ? 1 : -1;
}
else if (rhs.components.size() > min)
{
return -rhs.components[min] > 0 ? 1 : -1;
}
return 0;
}
}
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