File ordered_key_value.h

namespace faiss

Copyright (c) Facebook, Inc. and its affiliates.

This source code is licensed under the MIT license found in the LICENSE file in the root directory of this source tree.

Throughout the library, vectors are provided as float * pointers. Most algorithms can be optimized when several vectors are processed (added/searched) together in a batch. In this case, they are passed in as a matrix. When n vectors of size d are provided as float * x, component j of vector i is

x[ i * d + j ]

where 0 <= i < n and 0 <= j < d. In other words, matrices are always compact. When specifying the size of the matrix, we call it an n*d matrix, which implies a row-major storage.

Copyright (c) Facebook, Inc. and its affiliates.

This source code is licensed under the MIT license found in the LICENSE file in the root directory of this source tree. I/O functions can read/write to a filename, a file handle or to an object that abstracts the medium.

The read functions return objects that should be deallocated with delete. All references within these objectes are owned by the object.

Copyright (c) Facebook, Inc. and its affiliates.

This source code is licensed under the MIT license found in the LICENSE file in the root directory of this source tree. Definition of inverted lists + a few common classes that implement the interface.

Copyright (c) Facebook, Inc. and its affiliates.

This source code is licensed under the MIT license found in the LICENSE file in the root directory of this source tree. Since IVF (inverted file) indexes are of so much use for large-scale use cases, we group a few functions related to them in this small library. Most functions work both on IndexIVFs and IndexIVFs embedded within an IndexPreTransform.

Copyright (c) Facebook, Inc. and its affiliates.

This source code is licensed under the MIT license found in the LICENSE file in the root directory of this source tree. In this file are the implementations of extra metrics beyond L2 and inner product

Copyright (c) Facebook, Inc. and its affiliates.

This source code is licensed under the MIT license found in the LICENSE file in the root directory of this source tree. Defines a few objects that apply transformations to a set of vectors Often these are pre-processing steps.

Functions

template<typename T>
inline T cmin_nextafter(T x)
template<typename T>
inline T cmax_nextafter(T x)
template<>
inline float cmin_nextafter<float>(float x)
template<>
inline float cmax_nextafter<float>(float x)
template<>
inline uint16_t cmin_nextafter<uint16_t>(uint16_t x)
template<>
inline uint16_t cmax_nextafter<uint16_t>(uint16_t x)
template<typename T_, typename TI_>
struct CMax
#include <ordered_key_value.h>

The C object gives the type T of the values of a key-value storage, the type of the keys, TI and the comparison that is done: CMax for a decreasing series and CMin for increasing series. In other words, for a given threshold threshold, an incoming value x is kept if

C::cmp(threshold, x)

is true.

Public Types

typedef T_ T
typedef TI_ TI
typedef CMin<T_, TI_> Crev

Public Static Functions

static inline bool cmp(T a, T b)
static inline T neutral()
static inline T nextafter(T x)

Public Static Attributes

static const bool is_max = true
template<typename T_, typename TI_>
struct CMin

Public Types

typedef T_ T
typedef TI_ TI
typedef CMax<T_, TI_> Crev

Public Static Functions

static inline bool cmp(T a, T b)
static inline T neutral()
static inline T nextafter(T x)

Public Static Attributes

static const bool is_max = false