Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/Support/JamCRC.h
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//===-- llvm/Support/JamCRC.h - Cyclic Redundancy Check ---------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains an implementation of JamCRC.
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//
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// We will use the "Rocksoft^tm Model CRC Algorithm" to describe the properties
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// of this CRC:
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//   Width  : 32
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//   Poly   : 04C11DB7
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//   Init   : FFFFFFFF
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//   RefIn  : True
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//   RefOut : True
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//   XorOut : 00000000
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//   Check  : 340BC6D9 (result of CRC for "123456789")
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//
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// N.B.  We permit flexibility of the "Init" value.  Some consumers of this need
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//       it to be zero.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_SUPPORT_JAMCRC_H
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#define LLVM_SUPPORT_JAMCRC_H
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#include "llvm/Support/DataTypes.h"
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namespace llvm {
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template <typename T> class ArrayRef;
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class JamCRC {
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public:
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  JamCRC(uint32_t Init = 0xFFFFFFFFU) : CRC(Init) {}
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  // Update the CRC calculation with Data.
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  void update(ArrayRef<char> Data);
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  uint32_t getCRC() const { return CRC; }
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private:
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  uint32_t CRC;
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};
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} // End of namespace llvm
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#endif