Better handling of slice size vs. capacity in pointers to pointers.

examples/foundation/main.go

@@ -83,9 +83,9 @@ func main() {
 		ns.NSArrayWithObjects(nst("obj1"),nst("obj2")),
 		ns.NSArrayWithObjects(nst("key1"),nst("key2")),
 	)
-	os := make([]ns.Id,4)
+	os := make([]ns.Id,0,5)
 	fmt.Printf("Length of os is %d\n",len(os))
-	ks := make([]ns.Id,4)
+	ks := make([]ns.Id,0,5)
 	fmt.Printf("\nGetObjects()\n")
 	d.GetObjects(&os,&ks,4)
 	fmt.Printf("Length of os is now %d\n",len(os))

types/convert.go

@@ -402,13 +402,14 @@ func GoToC(name string, pnames, snames []string, rtype *Type, ptypes []*Type, fu
 	for i,sname := range snames {
 		if sname == "" { continue }
 		ret.WriteString(fmt.Sprintf(`
+	(*%s) = (*%s)[:cap(*%s)]
 	for i := 0; i < len(*%s); i++ {
 		if %s[i] == nil {
 			(*%s) = (*%s)[:i]
 			break
 		}
 		(*%s)[i].ptr = %s[i]
-	}`,pnames[i],sname,pnames[i],pnames[i],pnames[i],sname))
+	}`,pnames[i],pnames[i],pnames[i],pnames[i],sname,pnames[i],pnames[i],pnames[i],sname))
 	}
 	if rt != "void" {
 		ret.WriteString(`

wrap/main.go

@@ -977,7 +977,7 @@ func %s%s(%s) %s {
 			continue
 		}
 		w.goCode.WriteString(fmt.Sprintf(`
-	%s := make([]unsafe.Pointer,len(*%s))
+	%s := make([]unsafe.Pointer,cap(*%s))
 	for i := 0; i < len(*%s); i++ {
 		%s[i] = (*%s)[i].Ptr()
 	}