/BPHash

Simple hashing library for C++

Primary LanguageC++BSD 3-Clause "New" or "Revised" LicenseBSD-3-Clause

BPHash - A Hashing Library for C++11

BPHash is a C++ library designed for easy hashing of data types commonly encountered in C++.

The main documentation is found at http://bennybp.github.io/BPHash/

General Features

BPHash can be used to hash:

  • C++ STL containers
  • Enumerations
  • Raw pointers and arrays
  • Smart pointers
  • Custom classes and structures

In addition, BPHash also contains a structure that can be used in place of std::hash in containers such as unordered_set

Detection of the ability to be hashed is generally done at compile time, reducing the number of possible errors at runtime.

Requirements

All that is required is a C++11 compiler and CMake v3.0.2 or above (https://cmake.org)

Limitations

BPHash is designed to be consistent between runs of a program. It is not designed to be consistent between different compilations nor across compilers or platforms. If compiling with the same compiler and standard library, the hashes should be consistent.

The reason for this: while the underlying hash algorithms are compiler and platform-agnostic, part of the hashing using the mangled type name. Therefore, using a different compiler or standard library will result in different hashes.

Also, the current hashing algorithms are not designed for use as a cryptographic hash.

License

Copyright (c) 2016, Benjamin Pritchard ben@bennyp.org All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

  1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

  3. Neither the name of the copyright holder nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.