/* Distributed under the OSI-approved BSD 3-Clause License.  See accompanying

   file LICENSE.rst 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<(cmPathLabel const& l) const

{

  return this->Hash < l.Hash;

}

bool cmPathLabel::operator==(cmPathLabel const& l) const

{

  return this->Hash == l.Hash;

}