cet::CRC32Calculator Class Reference

#include <CRC32Calculator.h>

Public Member Functions
	CRC32Calculator (std::string const &message)
std::uint32_t	checksum () const

Private Attributes
std::uint32_t	checksum_

Detailed Description

Definition at line 62 of file CRC32Calculator.h.

Constructor & Destructor Documentation

cet::CRC32Calculator::CRC32Calculator ( std::string const &  message )

explicit

Definition at line 66 of file CRC32Calculator.cc.

  {

    /* initialize value */
    checksum_ = CRC32_XINIT;

    /* process each byte prior to checksum field */
    int length = message.length();
    char const* p = message.data();
    for (int j = 0; j < length; j++) {
      unsigned char uc = *p++;
      checksum_ = crctable[(checksum_ ^ uc) & 0xFFL] ^ (checksum_ >> 8);
    }

    /* return XOR out value */
    checksum_ = checksum_ ^ CRC32_XOROT;
  }

Member Function Documentation

std::uint32_t cet::CRC32Calculator::checksum ( ) const

inline

Definition at line 66 of file CRC32Calculator.h.

    {
      return checksum_;
    }

Member Data Documentation

std::uint32_t cet::CRC32Calculator::checksum_

private

Definition at line 72 of file CRC32Calculator.h.

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The documentation for this class was generated from the following files:

• cetlib/cetlib/test/CRC32Calculator.h
• cetlib/cetlib/test/CRC32Calculator.cc