PCL
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Functions | |
uint32 | pcl::Hash32 (const void *data, size_type size, uint32 seed=0) noexcept |
uint64 | pcl::Hash64 (const void *data, size_type size, uint64 seed=0) noexcept |
Computes a 32-bit non-cryptographic hash function.
data | Address of the first byte of the input data block. |
size | Length in bytes of the input data block. |
seed | Optional seed value for initialization of the hash function. If seed is zero or is not specified, the seed will be set equal to the length of the data block. |
Returns a 32-bit hash value computed from the input data block.
Test vector: "The quick brown fox jumps over the lazy dog"
Hash32 checksum = 752cd1b8 Test vector: "" (empty string)
Hash32 checksum = 2cc5d05
This function implements the xxHash algorithm by Yann Collet. Our code is an adaptation of the original code by the author:
https://github.com/Cyan4973/xxHash
Copyright (C) 2012-2014, Yann Collet.
The original code has been released under the BSD 2-Clause License:
http://www.opensource.org/licenses/bsd-license.php
Definition at line 4904 of file Math.h.
Referenced by pcl::GenericImage< P >::Hash32(), pcl::Array< T, A >::Hash32(), pcl::GenericMatrix< T >::Hash32(), pcl::GenericString< T, R, A >::Hash32(), and pcl::GenericVector< T >::Hash32().
Computes a 64-bit non-cryptographic hash function.
data | Address of the first byte of the input data block. |
size | Length in bytes of the input data block. |
seed | Optional seed value for initialization of the hash function. If seed is zero or is not specified, the seed will be set equal to the length of the data block. |
Returns a 64-bit hash value computed from the input data block.
Test vector: "The quick brown fox jumps over the lazy dog" Hash64 checksum = 9a11f5e9468d7425 Test vector: "" (empty string)
Hash64 checksum = ef46db3751d8e999
This function implements the xxHash algorithm by Yann Collet. Our code is an adaptation of the original code by the author:
https://github.com/Cyan4973/xxHash
Copyright (C) 2012-2014, Yann Collet.
The original code has been released under the BSD 2-Clause License:
http://www.opensource.org/licenses/bsd-license.php
Definition at line 4750 of file Math.h.
Referenced by pcl::GenericImage< P >::Hash(), pcl::IndirectArray< T, A >::Hash(), pcl::IndirectSortedArray< T, A >::Hash(), pcl::ReferenceArray< T, A >::Hash(), pcl::ReferenceSortedArray< T, A >::Hash(), pcl::SortedArray< T, A >::Hash(), pcl::Array< T, A >::Hash(), pcl::GenericMatrix< T >::Hash(), pcl::GenericString< T, R, A >::Hash(), pcl::GenericVector< T >::Hash(), pcl::GenericImage< P >::Hash64(), pcl::Array< T, A >::Hash64(), pcl::GenericMatrix< T >::Hash64(), pcl::GenericString< T, R, A >::Hash64(), and pcl::GenericVector< T >::Hash64().