CMSSW Reference Manual

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

Definition at line 81 of file CRC32Calculator.cc.

References checksum_, cms::CRC32_XINIT, cms::CRC32_XOROT, cms::crctable, j, and p.

00081                                                            {
00082 
00083     /* initialize value */
00084     checksum_ = CRC32_XINIT;
00085 
00086     /* process each byte prior to checksum field */
00087     int length = message.length();
00088     char const* p = message.data();
00089     for (int j = 0; j < length; j++) {
00090       unsigned char uc = *p++;
00091       checksum_ = cms::crctable[(checksum_ ^ uc) & 0xFFL] ^ (checksum_ >> 8);
00092     }
00093 
00094     /* return XOR out value */
00095     checksum_ = checksum_ ^ CRC32_XOROT;
00096   }

boost::uint32_t cms::CRC32Calculator::checksum ( ) [inline]

Definition at line 68 of file CRC32Calculator.h.

References checksum_.

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

00068 { return checksum_; }

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

Definition at line 72 of file CRC32Calculator.h.

Referenced by checksum(), and CRC32Calculator().


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

cms::CRC32Calculator Class Reference

Public Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation