nanovdb::crc32 Namespace Reference

Functions
__hostdev__ void	initLut (uint32_t lut[256], uint32_t n)
	Initiate single entry in look-up-table for CRC32 computations. More...
__hostdev__ void	initLut (uint32_t lut[256])
	Initiate entire look-up-table for CRC32 computations. More...
std::unique_ptr< uint32_t[]>	createLut ()
	Create and initiate entire look-up-table for CRC32 computations. More...
__hostdev__ uint32_t	checksum (const void *data, size_t size, uint32_t crc=0)
	Compute crc32 checksum of data of size bytes (without a lookup table)) More...
__hostdev__ uint32_t	checksum (const void *begin, const void *end, uint32_t crc=0)
	Compute crc32 checksum of data between begin and end. More...
__hostdev__ uint32_t	checksum (const void *data, size_t size, const uint32_t lut[256], uint32_t crc=0)
	Compute crc32 checksum of data with size bytes using a lookup table. More...
__hostdev__ uint32_t	checksum (const void *begin, const void *end, const uint32_t lut[256], uint32_t crc=0)
	Compute crc32 checksum of data between begin and end using a lookup table. More...

Function Documentation

__hostdev__ uint32_t nanovdb::crc32::checksum ( const void *  data, size_t  size, uint32_t  crc = 0  )

inline

Compute crc32 checksum of data of size bytes (without a lookup table))

Parameters

data	pointer to beginning of data
size	byte size of data
crc	initial value of crc32 checksum

Returns

return crc32 checksum of data

__hostdev__ uint32_t nanovdb::crc32::checksum ( const void *  begin, const void *  end, uint32_t  crc = 0  )

inline

Compute crc32 checksum of data between begin and end.

Parameters

begin	points to beginning of data
end	points to end of , (exclusive)
crc	initial value of crc32 checksum

Returns

return crc32 checksum

__hostdev__ uint32_t nanovdb::crc32::checksum ( const void *  data, size_t  size, const uint32_t  lut[256], uint32_t  crc = 0  )

inline

Compute crc32 checksum of data with size bytes using a lookup table.

Parameters

data	pointer to begenning of data
size	byte size
lut	pointer to loopup table for accelerated crc32 computation
crc	initial value of the checksum

Returns

crc32 checksum of data with size bytes

__hostdev__ uint32_t nanovdb::crc32::checksum ( const void *  begin, const void *  end, const uint32_t  lut[256], uint32_t  crc = 0  )

inline

Compute crc32 checksum of data between begin and end using a lookup table.

Parameters

begin	points to beginning of data
end	points to end of , (exclusive)
lut	pointer to loopup table for accelerated crc32 computation
crc	initial value of crc32 checksum

Returns

return crc32 checksum

std::unique_ptr<uint32_t[]> nanovdb::crc32::createLut ( )

inline

Create and initiate entire look-up-table for CRC32 computations.

Returns

returns a unique pointer to the lookup table of size 256.

__hostdev__ void nanovdb::crc32::initLut ( uint32_t  lut[256], uint32_t  n  )

inline

Initiate single entry in look-up-table for CRC32 computations.

Parameters

lut	pointer of size 256 for look-up-table
n	entry in table (assumed n < 256)

__hostdev__ void nanovdb::crc32::initLut ( uint32_t  lut[256] )

inline

Initiate entire look-up-table for CRC32 computations.

Parameters

lut	pointer of size 256 for look-up-table