Initial commit

packages/leann-backend-hnsw/third_party/faiss/c_api/IndexIVFFlat_c.cpp

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+/*
+ * Copyright (c) Meta Platforms, Inc. and affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+// -*- c++ -*-
+
+#include "IndexIVFFlat_c.h"
+#include <faiss/IndexIVFFlat.h>
+#include "Clustering_c.h"
+#include "Index_c.h"
+#include "macros_impl.h"
+
+using faiss::Index;
+using faiss::IndexIVFFlat;
+using faiss::MetricType;
+
+DEFINE_DESTRUCTOR(IndexIVFFlat)
+DEFINE_INDEX_DOWNCAST(IndexIVFFlat)
+
+/// number of possible key values
+DEFINE_GETTER(IndexIVFFlat, size_t, nlist)
+/// number of probes at query time
+DEFINE_GETTER(IndexIVFFlat, size_t, nprobe)
+DEFINE_SETTER(IndexIVFFlat, size_t, nprobe)
+
+/// quantizer that maps vectors to inverted lists
+DEFINE_GETTER_PERMISSIVE(IndexIVFFlat, FaissIndex*, quantizer)
+
+/**
+ * = 0: use the quantizer as index in a kmeans training
+ * = 1: just pass on the training set to the train() of the quantizer
+ * = 2: kmeans training on a flat index + add the centroids to the quantizer
+ */
+DEFINE_GETTER(IndexIVFFlat, char, quantizer_trains_alone)
+
+/// whether object owns the quantizer
+DEFINE_GETTER(IndexIVFFlat, int, own_fields)
+DEFINE_SETTER(IndexIVFFlat, int, own_fields)
+
+int faiss_IndexIVFFlat_new(FaissIndexIVFFlat** p_index) {
+    try {
+        *p_index = reinterpret_cast<FaissIndexIVFFlat*>(new IndexIVFFlat());
+    }
+    CATCH_AND_HANDLE
+}
+
+int faiss_IndexIVFFlat_new_with(
+        FaissIndexIVFFlat** p_index,
+        FaissIndex* quantizer,
+        size_t d,
+        size_t nlist) {
+    try {
+        auto q = reinterpret_cast<Index*>(quantizer);
+        *p_index = reinterpret_cast<FaissIndexIVFFlat*>(
+                new IndexIVFFlat(q, d, nlist));
+    }
+    CATCH_AND_HANDLE
+}
+
+int faiss_IndexIVFFlat_new_with_metric(
+        FaissIndexIVFFlat** p_index,
+        FaissIndex* quantizer,
+        size_t d,
+        size_t nlist,
+        FaissMetricType metric) {
+    try {
+        auto q = reinterpret_cast<Index*>(quantizer);
+        auto m = static_cast<MetricType>(metric);
+        *p_index = reinterpret_cast<FaissIndexIVFFlat*>(
+                new IndexIVFFlat(q, d, nlist, m));
+    }
+    CATCH_AND_HANDLE
+}
+
+int faiss_IndexIVFFlat_add_core(
+        FaissIndexIVFFlat* index,
+        idx_t n,
+        const float* x,
+        const idx_t* xids,
+        const int64_t* precomputed_idx) {
+    try {
+        reinterpret_cast<IndexIVFFlat*>(index)->add_core(
+                n, x, xids, precomputed_idx);
+    }
+    CATCH_AND_HANDLE
+}
+
+int faiss_IndexIVFFlat_update_vectors(
+        FaissIndexIVFFlat* index,
+        int nv,
+        idx_t* idx,
+        const float* v) {
+    try {
+        reinterpret_cast<IndexIVFFlat*>(index)->update_vectors(nv, idx, v);
+    }
+    CATCH_AND_HANDLE
+}