GridChecksum.h File Reference

Computes a pair of 32bit checksums, og a Grid, by means of Cyclic Redundancy Check (CRC) More...

#include <algorithm>
#include <array>
#include <vector>
#include <cstdint>
#include <cstddef>
#include <numeric>
#include <type_traits>
#include "../NanoVDB.h"
#include "GridHandle.h"
#include "ForEach.h"
#include "NodeManager.h"

Go to the source code of this file.

Classes
class	CRC32
	Class that computes the Cyclic Redundancy Check (CRC) More...
class	GridChecksum
	Class that encapsulates two CRC32 checksums, one for the Grid, Tree and Root node meta data and one for the remaining grid nodes. More...

Namespaces
	nanovdb

Enumerations
enum	ChecksumMode : uint32_t {   Disable = 0, Partial = 1, Full = 2, Default = 1,   End = 3 }
	List of different modes for computing for a checksum. More...

Functions
template<typename ValueT >
uint64_t	checksum (const NanoGrid< ValueT > &grid, ChecksumMode mode=ChecksumMode::Default)
	Return the (2 x CRC32) checksum of the specified grid. More...
template<typename ValueT >
bool	validateChecksum (const NanoGrid< ValueT > &grid, ChecksumMode mode=ChecksumMode::Default)
	Return true if the checksum of the grid matches the expected value already encoded into the grid's meta data. More...
template<typename ValueT >
void	updateChecksum (NanoGrid< ValueT > &grid, ChecksumMode mode=ChecksumMode::Default)
	Updates the checksum of a grid. More...
std::uint_fast32_t	crc32 (const void *data, size_t size)
	Return the CRC32 checksum of the raw data of size. More...
template<typename IterT >
std::uint_fast32_t	crc32 (IterT begin, IterT end)
	Return the CRC32 checksum of the content pointed to be the iterator. More...

Detailed Description

Computes a pair of 32bit checksums, og a Grid, by means of Cyclic Redundancy Check (CRC)

Author

Ken Museth

A CRC32 is the 32 bit remainder, or residue, of binary division of a message, by a polynomial.