https://github.com/Kitware/CMake
Tip revision: 8bd6af0d6386d1e0b26ff594b7d42621d67b5985 authored by Brad King on 02 May 2017, 12:40:39 UTC
CMake 3.8.1
CMake 3.8.1
Tip revision: 8bd6af0
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 <stddef.h>
cmPathLabel::cmPathLabel(const std::string& label)
: Label(label)
, Hash(0)
{
// Use a Jenkins one-at-a-time hash with under/over-flow protection
for (size_t i = 0; i < this->Label.size(); ++i) {
this->Hash += this->Label[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;
}