feat(verify): scalar arguments for -call invocations

verify/buffers_test.go

@@ -156,3 +156,41 @@ func TestBufPoolBuildArgs(t *testing.T) {
 		t.Errorf("src.len = %d, want 128", args[32])
 	}
 }
+
+func TestParseScalarArgs(t *testing.T) {
+	m, err := ParseScalarArgs("n=57,base=0x1f,x= 12 ")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if m["n"] != 57 || m["base"] != 0x1f || m["x"] != 12 {
+		t.Fatalf("parsed %+v", m)
+	}
+	if _, err := ParseScalarArgs("n"); err == nil {
+		t.Error("name-only spec must fail")
+	}
+	if _, err := ParseScalarArgs("n=zz"); err == nil {
+		t.Error("bad value must fail")
+	}
+}
+
+func TestApplyScalarArgs(t *testing.T) {
+	layout := []ArgOffset{
+		{Name: "text", Typ: "*byte", Offset: 0, Size: 8, IsPtr: true},
+		{Name: "n", Typ: "int", Offset: 8, Size: 8, IsPtr: false},
+	}
+	args := make([]byte, 16)
+	if err := ApplyScalarArgs(args, layout, map[string]uint64{"n": 0x1f}); err != nil {
+		t.Fatal(err)
+	}
+	if got := args[8]; got != 0x1f {
+		t.Fatalf("args[8] = %d, want 31", got)
+	}
+	// Pointer parameters reject scalar writes.
+	if err := ApplyScalarArgs(args, layout, map[string]uint64{"text": 5}); err == nil {
+		t.Fatal("pointer param must reject a scalar write")
+	}
+	// Unknown names reject.
+	if err := ApplyScalarArgs(args, layout, map[string]uint64{"nope": 1}); err == nil {
+		t.Fatal("unknown param must reject")
+	}
+}