From: Nick Rosbrook <rosbro...@ainfosec.com>
Define KeyValueList builtin type, analagous to libxl_key_value_list as
map[string]string, and implement its fromC and toC functions.
Signed-off-by: Nick Rosbrook <rosbro...@ainfosec.com>
---
Cc: George Dunlap <george.dun...@citrix.com>
Cc: Ian Jackson <ian.jack...@eu.citrix.com>
Cc: Wei Liu <w...@xen.org>
tools/golang/xenlight/xenlight.go | 33 ++++++++++++++++++++++++++++++-
1 file changed, 32 insertions(+), 1 deletion(-)
diff --git a/tools/golang/xenlight/xenlight.go
b/tools/golang/xenlight/xenlight.go
index 4d4fad2a9d..8196a42855 100644
--- a/tools/golang/xenlight/xenlight.go
+++ b/tools/golang/xenlight/xenlight.go
@@ -202,11 +202,42 @@ func (chwcap C.libxl_hwcap) toGo() (ghwcap Hwcap) {
return
}
+// KeyValueList represents a libxl_key_value_list.
+type KeyValueList map[string]string
+
+func (kvl KeyValueList) fromC(ckvl *C.libxl_key_value_list) error {
+ size := int(C.libxl_key_value_list_length(ckvl))
+ list := (*[1 << 30]*C.char)(unsafe.Pointer(ckvl))[:size:size]
+
+ for i := 0; i < size*2; i += 2 {
+ kvl[C.GoString(list[i])] = C.GoString(list[i+1])
+ }
+
+ return nil
+}
+
+func (kvl KeyValueList) toC() (C.libxl_key_value_list, error) {
+ // Add extra slot for sentinel
+ var char *C.char
+ csize := 2*len(kvl) + 1
+ ckvl := (C.libxl_key_value_list)(C.malloc(C.ulong(csize) *
C.ulong(unsafe.Sizeof(char))))
+ clist := (*[1 << 31]*C.char)(unsafe.Pointer(ckvl))[:csize:csize]
+
+ i := 0
+ for k, v := range kvl {
+ clist[i] = C.CString(k)
+ clist[i+1] = C.CString(v)
+ i += 2
+ }
+ clist[len(clist)-1] = nil
+
+ return ckvl, nil
+}
+
// typedef struct {
// uint32_t size; /* number of bytes in map */
// uint8_t *map;
// } libxl_bitmap;
-
// Implement the Go bitmap type such that the underlying data can
// easily be copied in and out. NB that we still have to do copies
// both directions, because cgo runtime restrictions forbid passing to
--
2.19.1
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