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31 lines
849 B
31 lines
849 B
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#include "cmPathLabel.h"
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#include <utility>
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cmPathLabel::cmPathLabel(std::string label)
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: Label(std::move(label))
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, Hash(0)
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{
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// Use a Jenkins one-at-a-time hash with under/over-flow protection
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for (char i : this->Label) {
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this->Hash += i;
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this->Hash += ((this->Hash & 0x003FFFFF) << 10);
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this->Hash ^= ((this->Hash & 0xFFFFFFC0) >> 6);
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}
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this->Hash += ((this->Hash & 0x1FFFFFFF) << 3);
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this->Hash ^= ((this->Hash & 0xFFFFF800) >> 11);
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this->Hash += ((this->Hash & 0x0001FFFF) << 15);
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}
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bool cmPathLabel::operator<(const cmPathLabel& l) const
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{
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return this->Hash < l.Hash;
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}
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bool cmPathLabel::operator==(const cmPathLabel& l) const
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{
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return this->Hash == l.Hash;
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}
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