Initial commit

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

@@ -0,0 +1,111 @@
+/*
+ * 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 "IndexScalarQuantizer_c.h"
+#include <faiss/IndexScalarQuantizer.h>
+#include <faiss/impl/ScalarQuantizer.h>
+#include "macros_impl.h"
+
+using faiss::Index;
+using faiss::IndexIVFScalarQuantizer;
+using faiss::IndexScalarQuantizer;
+
+DEFINE_DESTRUCTOR(IndexScalarQuantizer)
+DEFINE_INDEX_DOWNCAST(IndexScalarQuantizer)
+
+int faiss_IndexScalarQuantizer_new(FaissIndexScalarQuantizer** p_index) {
+    try {
+        *p_index = reinterpret_cast<FaissIndexScalarQuantizer*>(
+                new IndexScalarQuantizer());
+    }
+    CATCH_AND_HANDLE
+}
+
+int faiss_IndexScalarQuantizer_new_with(
+        FaissIndexScalarQuantizer** p_index,
+        idx_t d,
+        FaissQuantizerType qt,
+        FaissMetricType metric) {
+    try {
+        IndexScalarQuantizer* index = new IndexScalarQuantizer(
+                d,
+                static_cast<faiss::ScalarQuantizer::QuantizerType>(qt),
+                static_cast<faiss::MetricType>(metric));
+        *p_index = reinterpret_cast<FaissIndexScalarQuantizer*>(index);
+        return 0;
+    }
+    CATCH_AND_HANDLE
+}
+
+DEFINE_DESTRUCTOR(IndexIVFScalarQuantizer)
+DEFINE_INDEX_DOWNCAST(IndexIVFScalarQuantizer)
+
+/// quantizer that maps vectors to inverted lists
+DEFINE_GETTER_PERMISSIVE(IndexIVFScalarQuantizer, FaissIndex*, quantizer)
+
+/// number of possible key values
+DEFINE_GETTER(IndexIVFScalarQuantizer, size_t, nlist)
+/// number of probes at query time
+DEFINE_GETTER(IndexIVFScalarQuantizer, size_t, nprobe)
+DEFINE_SETTER(IndexIVFScalarQuantizer, size_t, nprobe)
+
+/// whether object owns the quantizer
+DEFINE_GETTER(IndexIVFScalarQuantizer, int, own_fields)
+DEFINE_SETTER(IndexIVFScalarQuantizer, int, own_fields)
+
+int faiss_IndexIVFScalarQuantizer_new_with(
+        FaissIndexIVFScalarQuantizer** p_index,
+        FaissIndex* quantizer,
+        size_t d,
+        size_t nlist,
+        FaissQuantizerType qt) {
+    try {
+        auto q = reinterpret_cast<Index*>(quantizer);
+        auto qt_ = static_cast<faiss::ScalarQuantizer::QuantizerType>(qt);
+        IndexIVFScalarQuantizer* index =
+                new IndexIVFScalarQuantizer(q, d, nlist, qt_);
+        *p_index = reinterpret_cast<FaissIndexIVFScalarQuantizer*>(index);
+        return 0;
+    }
+    CATCH_AND_HANDLE
+}
+
+int faiss_IndexIVFScalarQuantizer_new_with_metric(
+        FaissIndexIVFScalarQuantizer** p_index,
+        FaissIndex* quantizer,
+        size_t d,
+        size_t nlist,
+        FaissQuantizerType qt,
+        FaissMetricType metric,
+        int encode_residual) {
+    try {
+        auto q = reinterpret_cast<Index*>(quantizer);
+        auto mt = static_cast<faiss::MetricType>(metric);
+        auto er = static_cast<bool>(encode_residual);
+        auto qt_ = static_cast<faiss::ScalarQuantizer::QuantizerType>(qt);
+        IndexIVFScalarQuantizer* index =
+                new IndexIVFScalarQuantizer(q, d, nlist, qt_, mt, er);
+        *p_index = reinterpret_cast<FaissIndexIVFScalarQuantizer*>(index);
+        return 0;
+    }
+    CATCH_AND_HANDLE
+}
+
+int faiss_IndexIVFScalarQuantizer_add_core(
+        FaissIndexIVFScalarQuantizer* index,
+        idx_t n,
+        const float* x,
+        const idx_t* xids,
+        const idx_t* precomputed_idx) {
+    try {
+        reinterpret_cast<IndexIVFScalarQuantizer*>(index)->add_core(
+                n, x, xids, precomputed_idx);
+    }
+    CATCH_AND_HANDLE
+}