Initial QSfera import

Server/vendor/github.com/blevesearch/go-faiss/autotune.go

@@ -0,0 +1,44 @@
+package faiss
+
+/*
+#include <stdlib.h>
+#include <faiss/c_api/AutoTune_c.h>
+*/
+import "C"
+import (
+	"unsafe"
+)
+
+type ParameterSpace struct {
+	ps *C.FaissParameterSpace
+}
+
+// NewParameterSpace creates a new ParameterSpace.
+func NewParameterSpace() (*ParameterSpace, error) {
+	var ps *C.FaissParameterSpace
+	if c := C.faiss_ParameterSpace_new(&ps); c != 0 {
+		return nil, getLastError()
+	}
+	return &ParameterSpace{ps}, nil
+}
+
+// SetIndexParameter sets one of the parameters.
+func (p *ParameterSpace) SetIndexParameter(idx Index, name string, val float64) error {
+	cname := C.CString(name)
+
+	defer func() {
+		C.free(unsafe.Pointer(cname))
+	}()
+
+	c := C.faiss_ParameterSpace_set_index_parameter(
+		p.ps, idx.cPtr(), cname, C.double(val))
+	if c != 0 {
+		return getLastError()
+	}
+	return nil
+}
+
+// Delete frees the memory associated with p.
+func (p *ParameterSpace) Delete() {
+	C.faiss_ParameterSpace_free(p.ps)
+}