[v2,06/22] golang/xenlight: define StringList builtin type
diff mbox series

Message ID 10f1969a1431879c2f1f4bdbcb3f29a3dd81ea6d.1573840474.git.rosbrookn@ainfosec.com
State Superseded
Headers show
Series
  • generated Go libxl bindings using IDL
Related show

Commit Message

Nick Rosbrook Nov. 15, 2019, 7:44 p.m. UTC
From: Nick Rosbrook <rosbrookn@ainfosec.com>

Define StringList as []string an implement fromC and toC functions.

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
---
Changes in v2:
- Define fromC with a pointer receiver since a newly-allocated slice
  is being assigned to the StringList.

 tools/golang/xenlight/xenlight.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

Comments

George Dunlap Dec. 4, 2019, 4:15 p.m. UTC | #1
On 11/15/19 7:44 PM, Nick Rosbrook wrote:
> From: Nick Rosbrook <rosbrookn@ainfosec.com>
> 
> Define StringList as []string an implement fromC and toC functions.
> 
> Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>

Reviewed-by: George Dunlap <george.dunlap@citrix.com>

Patch
diff mbox series

diff --git a/tools/golang/xenlight/xenlight.go b/tools/golang/xenlight/xenlight.go
index 1c5e3c0cc7..72afc3cf14 100644
--- a/tools/golang/xenlight/xenlight.go
+++ b/tools/golang/xenlight/xenlight.go
@@ -212,6 +212,35 @@  type KeyValueList struct{}
 func (kvl KeyValueList) fromC(ckvl *C.libxl_key_value_list) error      { return nil }
 func (kvl KeyValueList) toC() (ckvl C.libxl_key_value_list, err error) { return }
 
+// StringList represents a libxl_string_list.
+type StringList []string
+
+func (sl *StringList) fromC(csl *C.libxl_string_list) error {
+	size := int(C.libxl_string_list_length(csl))
+	list := (*[1 << 30]*C.char)(unsafe.Pointer(csl))[:size:size]
+
+	*sl = make([]string, size)
+
+	for i, v := range list {
+		(*sl)[i] = C.GoString(v)
+	}
+
+	return nil
+}
+
+func (sl StringList) toC() (C.libxl_string_list, error) {
+	var char *C.char
+	size := len(sl)
+	csl := (C.libxl_string_list)(C.malloc(C.ulong(size) * C.ulong(unsafe.Sizeof(char))))
+	clist := (*[1 << 30]*C.char)(unsafe.Pointer(csl))[:size:size]
+
+	for i, v := range sl {
+		clist[i] = C.CString(v)
+	}
+
+	return csl, nil
+}
+
 // Bitmap represents a libxl_bitmap.
 //
 // Implement the Go bitmap type such that the underlying data can