1 files changed, 45 insertions, 0 deletions
diff --git a/eval/src/tests/ann/read-vecs.h b/eval/src/tests/ann/read-vecs.h
new file mode 100644
index 00000000000..39c2a332710
--- /dev/null
+++ b/eval/src/tests/ann/read-vecs.h
@@ -0,0 +1,45 @@
+// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+
+void read_queries(std::string fn) {
+    int fd = open(fn.c_str(), O_RDONLY);
+    ASSERT_TRUE(fd > 0);
+    int d;
+    size_t rv;
+    fprintf(stderr, "reading %u queries from %s\n", NUM_Q, fn.c_str());
+    for (uint32_t qid = 0; qid < NUM_Q; ++qid) {
+        rv = read(fd, &d, 4);
+        ASSERT_EQUAL(rv, 4u);
+        ASSERT_EQUAL(d, NUM_DIMS);
+        rv = read(fd, &generatedQueries[qid].v, NUM_DIMS*sizeof(float));
+        ASSERT_EQUAL(rv, sizeof(PointVector));
+    }
+    close(fd);
+}
+
+void read_docs(std::string fn) {
+    int fd = open(fn.c_str(), O_RDONLY);
+    ASSERT_TRUE(fd > 0);
+    int d;
+    size_t rv;
+    fprintf(stderr, "reading %u doc vectors from %s\n", NUM_DOCS, fn.c_str());
+    for (uint32_t docid = 0; docid < NUM_DOCS; ++docid) {
+        rv = read(fd, &d, 4);
+        ASSERT_EQUAL(rv, 4u);
+        ASSERT_EQUAL(d, NUM_DIMS);
+        rv = read(fd, &generatedDocs[docid].v, NUM_DIMS*sizeof(float));
+        ASSERT_EQUAL(rv, sizeof(PointVector));
+    }
+    close(fd);
+}
+
+void read_data(const std::string& dir, const std::string& data_set) {
+    fprintf(stderr, "read data set '%s' from directory '%s'\n", data_set.c_str(), dir.c_str());
+    TimePoint bef = std::chrono::steady_clock::now();
+    read_queries(dir + "/" + data_set + "_query.fvecs");
+    TimePoint aft = std::chrono::steady_clock::now();
+    fprintf(stderr, "read queries: %.3f ms\n", to_ms(aft - bef));
+    bef = std::chrono::steady_clock::now();
+    read_docs(dir + "/" + data_set + "_base.fvecs");
+    aft = std::chrono::steady_clock::now();
+    fprintf(stderr, "read docs: %.3f ms\n", to_ms(aft - bef));
+}