pdq/php/ext/pdq/impl/torben.h (4 lines of code) (raw):
// ================================================================
// Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
// ================================================================
#ifndef TORBEN_H
#define TORBEN_H
/*
* The following code is public domain.
* Algorithm by Torben Mogensen, implementation by N. Devillard.
* This code in public domain.
*/
float torben(float m[], int n);
#endif // TORBEN_H