From 7611d0cf8399b538003a83204fc38126a2c35208 Mon Sep 17 00:00:00 2001
From: Michael Kosten <michael.kosten@gettyimages.com>
Date: Thu, 17 Oct 2024 12:55:37 -0700
Subject: [PATCH 1/2] Add VectorTransform read from filename to the C API

---
 c_api/index_io_c.cpp | 9 +++++++++
 c_api/index_io_c.h   | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/c_api/index_io_c.cpp b/c_api/index_io_c.cpp
index 8814db59f1..8a62734b9b 100644
--- a/c_api/index_io_c.cpp
+++ b/c_api/index_io_c.cpp
@@ -15,6 +15,7 @@
 
 using faiss::Index;
 using faiss::IndexBinary;
+using faiss::VectorTransform;
 
 int faiss_write_index(const FaissIndex* idx, FILE* f) {
     try {
@@ -84,3 +85,11 @@ int faiss_read_index_binary_fname(
     }
     CATCH_AND_HANDLE
 }
+
+int faiss_read_VectorTransform_fname(const char* fname, FaissVectorTransform** p_out) {
+    try {
+        auto out = faiss::read_VectorTransform(fname);
+        *p_out = reinterpret_cast<FaissVectorTransform*>(out);
+    }
+    CATCH_AND_HANDLE
+}
diff --git a/c_api/index_io_c.h b/c_api/index_io_c.h
index 8935de0219..15cb9394d1 100644
--- a/c_api/index_io_c.h
+++ b/c_api/index_io_c.h
@@ -16,6 +16,7 @@
 #include "IndexBinary_c.h"
 #include "Index_c.h"
 #include "faiss_c.h"
+#include "VectorTransform_c.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -72,6 +73,11 @@ int faiss_read_index_binary_fname(
         const char* fname,
         int io_flags,
         FaissIndexBinary** p_out);
+
+/** Read vector transform from a file.
+ * This is equivalent to `faiss:read_VectorTransform` when a file path is given.
+ */
+int faiss_read_VectorTransform_fname(const char* fname, FaissVectorTransform** p_out);
 #ifdef __cplusplus
 }
 #endif

From ed52b9d195bcbdae321be4ec4069041dd3807e53 Mon Sep 17 00:00:00 2001
From: Michael Kosten <michael.kosten@gettyimages.com>
Date: Mon, 21 Oct 2024 15:21:50 -0700
Subject: [PATCH 2/2] Apply clang-format for changes

---
 c_api/index_io_c.cpp | 4 +++-
 c_api/index_io_c.h   | 6 ++++--
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/c_api/index_io_c.cpp b/c_api/index_io_c.cpp
index d5520ac268..e570e73e40 100644
--- a/c_api/index_io_c.cpp
+++ b/c_api/index_io_c.cpp
@@ -85,7 +85,9 @@ int faiss_read_index_binary_fname(
     CATCH_AND_HANDLE
 }
 
-int faiss_read_VectorTransform_fname(const char* fname, FaissVectorTransform** p_out) {
+int faiss_read_VectorTransform_fname(
+        const char* fname,
+        FaissVectorTransform** p_out) {
     try {
         auto out = faiss::read_VectorTransform(fname);
         *p_out = reinterpret_cast<FaissVectorTransform*>(out);
diff --git a/c_api/index_io_c.h b/c_api/index_io_c.h
index 5f7a428d2d..51832abe47 100644
--- a/c_api/index_io_c.h
+++ b/c_api/index_io_c.h
@@ -14,8 +14,8 @@
 #include <stdio.h>
 #include "IndexBinary_c.h"
 #include "Index_c.h"
-#include "faiss_c.h"
 #include "VectorTransform_c.h"
+#include "faiss_c.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -76,7 +76,9 @@ int faiss_read_index_binary_fname(
 /** Read vector transform from a file.
  * This is equivalent to `faiss:read_VectorTransform` when a file path is given.
  */
-int faiss_read_VectorTransform_fname(const char* fname, FaissVectorTransform** p_out);
+int faiss_read_VectorTransform_fname(
+        const char* fname,
+        FaissVectorTransform** p_out);
 #ifdef __cplusplus
 }
 #endif