rdChecksum.h File Reference

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Functions
unsigned long	rdxsum_calc (const long *ptr, char version)
void	rdxsum_fill (long *ptr, char version)
int	rdxsum_test (const long *ptr)

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Function Documentation

unsigned long rdxsum_calc (  const long *  ptr, char  version )

Definition at line 27 of file rdChecksum.c. Referenced by append_dcs_alarm_block(), append_dcs_header_block(), append_dcs_monitor_block(), dump_one_record(), rdxsum_fill(), rdxsum_test(), and send_bogus_stuff(). { unsigned long sum = 0; const long *begin = ptr + 2; /* contiguous data starts here */ const long *end = ptr + (*ptr); /* this is one word too far */ int v2 = version & 0x3; /* protect against null pointers */ if (!ptr) return 0; /* * By reserving 2 bits at the top we can support 4 possible * checksum algorithms, in case we wish to switch at a later * time, while still retaining the ability to know which * algorithm was used. Until all are implemented, cascade * downward until an existing one is found. */ switch (v2) { case 0x3: v2 = 0x3; /* tag with what we used, not requested */ /* break; */ /* this version not supported: fall through */ case 0x2: v2 = 0x2; /* tag with what we used, not requested */ /* break; */ /* this version not supported: fall through */ case 0x1: v2 = 0x1 ; /* tag with what we used, not requested */ /* --- add next algorithm here, make break "active" */ /* break; */ /* this version not supported: fall through */ case 0x0: default: /* the "0" and default algorithm is very simple ... */ /* simply add up everything ignoring overflows */ v2 = 0x0; /* tag with what we used, not requested */ sum = *ptr; /* prime the pump with the word count */ while (begin<end) sum += *begin++; } /* remove top two bits and replace them with the version */ return (sum & 0x3fffffff) | ( version << 30 ); }

void rdxsum_fill (  long *  ptr, char  version )

Definition at line 83 of file rdChecksum.c. References rdxsum_calc(). Referenced by RawTofConverter::AbandonRawTOFBlock(), OltNewModule::CalculateDeadChips(), BeamDataImp::create_block(), RerootToRawDataModule::FinalizeWorkingArray(), DetSim::FinalizeWorkingArray(), RawTofConverter::GetPackedRawTOFBlock(), RawBeamMonHeaderBlock::RawBeamMonHeaderBlock(), RawConfigFilesBlock::RawConfigFilesBlock(), RawDaqDeadTimeBlock::RawDaqDeadTimeBlock(), RawDaqHeaderBlock::RawDaqHeaderBlock(), RawDcsHeaderBlock::RawDcsHeaderBlock(), RawDeadChipBlock::RawDeadChipBlock(), RawErrorStatsBlock::RawErrorStatsBlock(), RawQieErrorStatsBlock::RawQieErrorStatsBlock(), RawRunCommentBlock::RawRunCommentBlock(), RawRunConfigBlock::RawRunConfigBlock(), RawRunEndBlock::RawRunEndBlock(), RawRunStartBlock::RawRunStartBlock(), RawSnarlHeaderBlock::RawSnarlHeaderBlock(), RawSpillServerMonitorBlock::RawSpillServerMonitorBlock(), RawSubRunEndBlock::RawSubRunEndBlock(), RawTpSinglesSummaryBlock::RawTpSinglesSummaryBlock(), RawTriggerStatsBlock::RawTriggerStatsBlock(), and OltNewModule::WriteEvent(). { /* protect against null pointers */ if (!ptr) return; *(ptr+1) = rdxsum_calc(ptr,version); }

int rdxsum_test (  const long *  ptr  )

Definition at line 105 of file rdChecksum.c. References rdxsum_calc(). Referenced by dump_one_record(), and RawDataBlock::TestChecksum(). { unsigned long stored; int version; /* protect against null pointers */ if (!ptr) return 1; stored = *(ptr+1); version = ( 0x3 & ( stored >> 30 ) ); return stored != rdxsum_calc(ptr,version); }

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