cms::CRC32Calculator Class Reference

#include <CRC32Calculator.h>

List of all members.

Public Member Functions
boost::uint32_t	checksum ()
	CRC32Calculator (std::string const &message)
Private Attributes
boost::uint32_t	checksum_

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Detailed Description

Definition at line 62 of file CRC32Calculator.h.

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Constructor & Destructor Documentation

cms::CRC32Calculator::CRC32Calculator

(

std::string const &

message

)

Definition at line 81 of file CRC32Calculator.cc.

References checksum_, j, and AlCaHLTBitMon_ParallelJobs::p.

                                                           {

    /* 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_ = cms::crctable[(checksum_ ^ uc) & 0xFFL] ^ (checksum_ >> 8);
    }

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

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Member Function Documentation

boost::uint32_t cms::CRC32Calculator::checksum

(

)

[inline]

Definition at line 68 of file CRC32Calculator.h.

References checksum_.

Referenced by edm::BranchID::toID().

{ return checksum_; }

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Member Data Documentation

boost::uint32_t cms::CRC32Calculator::checksum_ [private]

Definition at line 72 of file CRC32Calculator.h.

Referenced by checksum(), and CRC32Calculator().