https://github.com/Kitware/CMake
Tip revision: 5b43aa775507c974284bbae2e6bd13e11caec80d authored by Brad King on 16 December 2019, 15:21:27 UTC
CMake 3.15.6
CMake 3.15.6
Tip revision: 5b43aa7
cmPathLabel.cxx
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#include "cmPathLabel.h"
#include <utility>
cmPathLabel::cmPathLabel(std::string label)
: Label(std::move(label))
, Hash(0)
{
// Use a Jenkins one-at-a-time hash with under/over-flow protection
for (char i : this->Label) {
this->Hash += i;
this->Hash += ((this->Hash & 0x003FFFFF) << 10);
this->Hash ^= ((this->Hash & 0xFFFFFFC0) >> 6);
}
this->Hash += ((this->Hash & 0x1FFFFFFF) << 3);
this->Hash ^= ((this->Hash & 0xFFFFF800) >> 11);
this->Hash += ((this->Hash & 0x0001FFFF) << 15);
}
bool cmPathLabel::operator<(const cmPathLabel& l) const
{
return this->Hash < l.Hash;
}
bool cmPathLabel::operator==(const cmPathLabel& l) const
{
return this->Hash == l.Hash;
}