func TestGetSetStructValue(t *testing.T) {
const val = 42
arr10, err := ffi.NewArrayType(10, ffi.C_int32)
if err != nil {
t.Errorf(err.Error())
}
ctyp, err := ffi.NewStructType(
"struct_ssv",
[]ffi.Field{
{"F1", ffi.C_uint16},
{"F2", arr10},
{"F3", ffi.C_int32},
{"F4", ffi.C_uint16},
})
eq(t, "struct_ssv", ctyp.Name())
eq(t, ffi.Struct, ctyp.Kind())
eq(t, 4, ctyp.NumField())
cval := ffi.New(ctyp)
eq(t, ctyp.Kind(), cval.Kind())
eq(t, ctyp.NumField(), cval.NumField())
eq(t, uint64(0), cval.Field(0).Uint())
for i := 0; i < arr10.Len(); i++ {
eq(t, int64(0), cval.Field(1).Index(i).Int())
}
eq(t, int64(0), cval.Field(2).Int())
eq(t, uint64(0), cval.Field(3).Uint())
// set everything to 'val'
cval.Field(0).SetUint(val)
for i := 0; i < arr10.Len(); i++ {
cval.Field(1).Index(i).SetInt(val)
}
cval.Field(2).SetInt(val)
cval.Field(3).SetUint(val)
// test values back
eq(t, uint64(val), cval.Field(0).Uint())
for i := 0; i < arr10.Len(); i++ {
eq(t, int64(val), cval.Field(1).Index(i).Int())
}
eq(t, int64(val), cval.Field(2).Int())
eq(t, uint64(val), cval.Field(3).Uint())
// test values back - by field name
eq(t, uint64(val), cval.FieldByName("F1").Uint())
for i := 0; i < arr10.Len(); i++ {
eq(t, int64(val), cval.FieldByName("F2").Index(i).Int())
}
eq(t, int64(val), cval.FieldByName("F3").Int())
eq(t, uint64(val), cval.FieldByName("F4").Uint())
}
func TestNewArrayType(t *testing.T) {
s_t, err := ffi.NewStructType("s_0", []ffi.Field{{"a", ffi.C_int32}})
if err != nil {
t.Errorf(err.Error())
}
p_s_t, err := ffi.NewPointerType(s_t)
if err != nil {
t.Errorf(err.Error())
}
for _, table := range []struct {
name string
n int
elem ffi.Type
}{
{"uint8[10]", 10, ffi.C_uint8},
{"uint16[10]", 10, ffi.C_uint16},
{"uint32[10]", 10, ffi.C_uint32},
{"uint64[10]", 10, ffi.C_uint64},
{"int8[10]", 10, ffi.C_int8},
{"int16[10]", 10, ffi.C_int16},
{"int32[10]", 10, ffi.C_int32},
{"int64[10]", 10, ffi.C_int64},
{"float[10]", 10, ffi.C_float},
{"double[10]", 10, ffi.C_double},
{"s_0[10]", 10, s_t},
{"s_0*[10]", 10, p_s_t},
} {
typ, err := ffi.NewArrayType(table.n, table.elem)
if err != nil {
t.Errorf(err.Error())
}
eq(t, table.name, typ.Name())
eq(t, table.elem, typ.Elem())
eq(t, uintptr(table.n)*table.elem.Size(), typ.Size())
eq(t, table.n, typ.Len())
eq(t, ffi.Array, typ.Kind())
}
}
func TestGetSetArrayValue(t *testing.T) {
{
const val = 42
for _, tt := range []struct {
n string
len int
t ffi.Type
val interface{}
}{
{"uint8[10]", 10, ffi.C_uint8, [10]uint8{}},
{"uint16[10]", 10, ffi.C_uint16, [10]uint16{}},
{"uint32[10]", 10, ffi.C_uint32, [10]uint32{}},
{"uint64[10]", 10, ffi.C_uint64, [10]uint64{}},
} {
ctyp, err := ffi.NewArrayType(tt.len, tt.t)
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
eq(t, tt.n, cval.Type().Name())
eq(t, ctyp.Kind(), cval.Kind())
gtyp := reflect.TypeOf(tt.val)
gval := reflect.New(gtyp).Elem()
eq(t, gval.Len(), cval.Len())
for i := 0; i < gval.Len(); i++ {
eq(t, gval.Index(i).Uint(), cval.Index(i).Uint())
gval.Index(i).SetUint(val)
cval.Index(i).SetUint(val)
eq(t, gval.Index(i).Uint(), cval.Index(i).Uint())
}
}
}
{
const val = 42
for _, tt := range []struct {
n string
len int
t ffi.Type
val interface{}
}{
{"int8[10]", 10, ffi.C_int8, [10]int8{}},
{"int16[10]", 10, ffi.C_int16, [10]int16{}},
{"int32[10]", 10, ffi.C_int32, [10]int32{}},
{"int64[10]", 10, ffi.C_int64, [10]int64{}},
} {
ctyp, err := ffi.NewArrayType(tt.len, tt.t)
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
eq(t, tt.n, cval.Type().Name())
eq(t, ctyp.Kind(), cval.Kind())
gtyp := reflect.TypeOf(tt.val)
gval := reflect.New(gtyp).Elem()
eq(t, gval.Len(), cval.Len())
for i := 0; i < gval.Len(); i++ {
eq(t, gval.Index(i).Int(), cval.Index(i).Int())
gval.Index(i).SetInt(val)
cval.Index(i).SetInt(val)
eq(t, gval.Index(i).Int(), cval.Index(i).Int())
}
}
}
{
const val = -66.2
for _, tt := range []struct {
n string
len int
t ffi.Type
val interface{}
}{
{"float[10]", 10, ffi.C_float, [10]float32{}},
{"double[10]", 10, ffi.C_double, [10]float64{}},
// FIXME: go has no long double equivalent
//{"long double[10]", 10, ffi.C_longdouble, [10]float128{}},
} {
ctyp, err := ffi.NewArrayType(tt.len, tt.t)
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
eq(t, tt.n, cval.Type().Name())
eq(t, ctyp.Kind(), cval.Kind())
gtyp := reflect.TypeOf(tt.val)
gval := reflect.New(gtyp).Elem()
eq(t, gval.Len(), cval.Len())
for i := 0; i < gval.Len(); i++ {
eq(t, gval.Index(i).Float(), cval.Index(i).Float())
gval.Index(i).SetFloat(val)
cval.Index(i).SetFloat(val)
eq(t, gval.Index(i).Float(), cval.Index(i).Float())
}
}
}
}
func TestEncoderDecoder(t *testing.T) {
arr_10, _ := ffi.NewArrayType(10, ffi.C_int32)
sli_10, _ := ffi.NewSliceType(ffi.C_int32)
const sz = 10
{
const val = 42
for _, v := range []interface{}{
int(val),
int8(val),
int16(val),
int32(val),
int64(val),
} {
ct := ffi.TypeOf(v)
cv := ffi.New(ct)
enc := ffi.NewEncoder(cv)
err := enc.Encode(v)
if err != nil {
t.Errorf(err.Error())
}
eq(t, int64(val), cv.Int())
// now decode back
vv := reflect.New(reflect.TypeOf(v))
dec := ffi.NewDecoder(cv)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
eq(t, vv.Elem().Int(), cv.Int())
}
}
{
const val = 42
for _, v := range []interface{}{
uint(val),
uint8(val),
uint16(val),
uint32(val),
uint64(val),
} {
ct := ffi.TypeOf(v)
cv := ffi.New(ct)
enc := ffi.NewEncoder(cv)
err := enc.Encode(v)
if err != nil {
t.Errorf(err.Error())
}
eq(t, uint64(val), cv.Uint())
// now decode back
vv := reflect.New(reflect.TypeOf(v))
dec := ffi.NewDecoder(cv)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
eq(t, vv.Elem().Uint(), cv.Uint())
}
}
{
const val = 42.0
for _, v := range []interface{}{
float32(val),
float64(val),
} {
ct := ffi.TypeOf(v)
cv := ffi.New(ct)
enc := ffi.NewEncoder(cv)
err := enc.Encode(v)
if err != nil {
t.Errorf(err.Error())
}
eq(t, float64(val), cv.Float())
// now decode back
vv := reflect.New(reflect.TypeOf(v))
dec := ffi.NewDecoder(cv)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
eq(t, vv.Elem().Float(), cv.Float())
}
}
{
const val = 42
ctyp, err := ffi.NewStructType(
"struct_ints",
[]ffi.Field{
{"F1", ffi.C_int8},
{"F2", ffi.C_int16},
{"F3", ffi.C_int32},
{"F4", ffi.C_int64},
})
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
gval := struct {
F1 int8
F2 int16
F3 int32
F4 int64
}{val + 1, val + 1, val + 1, val + 1}
err = ffi.Associate(ctyp, reflect.TypeOf(gval))
if err != nil {
t.Errorf(err.Error())
}
enc := ffi.NewEncoder(cval)
err = enc.Encode(gval)
if err != nil {
t.Errorf(err.Error())
}
rval := reflect.ValueOf(gval)
for i := 0; i < ctyp.NumField(); i++ {
eq(t, rval.Field(i).Int(), cval.Field(i).Int())
}
// now decode back
vv := reflect.New(rval.Type())
dec := ffi.NewDecoder(cval)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
rval = vv.Elem()
for i := 0; i < ctyp.NumField(); i++ {
eq(t, rval.Field(i).Int(), cval.Field(i).Int())
}
}
{
const val = 42
ctyp, err := ffi.NewStructType(
"struct_ints_arr10",
[]ffi.Field{
{"F1", ffi.C_int8},
{"F2", ffi.C_int16},
{"A1", arr_10},
{"F3", ffi.C_int32},
{"F4", ffi.C_int64},
})
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
gval := struct {
F1 int8
F2 int16
A1 [sz]int32
F3 int32
F4 int64
}{
val + 1, val + 1,
[sz]int32{
val, val, val, val, val,
val, val, val, val, val,
},
val + 1, val + 1,
}
err = ffi.Associate(ctyp, reflect.TypeOf(gval))
if err != nil {
t.Errorf(err.Error())
}
enc := ffi.NewEncoder(cval)
err = enc.Encode(gval)
if err != nil {
t.Errorf(err.Error())
}
rval := reflect.ValueOf(gval)
eq(t, rval.Field(0).Int(), cval.Field(0).Int())
eq(t, rval.Field(1).Int(), cval.Field(1).Int())
eq(t, rval.Field(3).Int(), cval.Field(3).Int())
eq(t, rval.Field(4).Int(), cval.Field(4).Int())
rfield := cval.Field(2)
cfield := cval.Field(2)
eq(t, rfield.Len(), cfield.Len())
for i := 0; i < cfield.Len(); i++ {
eq(t, rfield.Index(i).Int(), cfield.Index(i).Int())
}
// now decode back
vv := reflect.New(rval.Type())
dec := ffi.NewDecoder(cval)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
rval = vv.Elem()
eq(t, rval.Field(0).Int(), cval.Field(0).Int())
eq(t, rval.Field(1).Int(), cval.Field(1).Int())
eq(t, rval.Field(3).Int(), cval.Field(3).Int())
eq(t, rval.Field(4).Int(), cval.Field(4).Int())
rfield = cval.Field(2)
cfield = cval.Field(2)
eq(t, rfield.Len(), cfield.Len())
for i := 0; i < cfield.Len(); i++ {
eq(t, rfield.Index(i).Int(), cfield.Index(i).Int())
}
}
{
const val = 42
ctyp, err := ffi.NewStructType(
"struct_ints_sli10",
[]ffi.Field{
{"F1", ffi.C_int8},
{"F2", ffi.C_int16},
{"S1", sli_10},
{"F3", ffi.C_int32},
{"F4", ffi.C_int64},
})
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
gval := struct {
F1 int8
F2 int16
S1 []int32
F3 int32
F4 int64
}{
val + 1, val + 1,
[]int32{
val, val, val, val, val,
val, val, val, val, val,
},
val + 1, val + 1,
}
err = ffi.Associate(ctyp, reflect.TypeOf(gval))
if err != nil {
t.Errorf(err.Error())
}
enc := ffi.NewEncoder(cval)
err = enc.Encode(gval)
if err != nil {
t.Errorf(err.Error())
}
rval := reflect.ValueOf(gval)
eq(t, rval.Field(0).Int(), cval.Field(0).Int())
eq(t, rval.Field(1).Int(), cval.Field(1).Int())
eq(t, rval.Field(3).Int(), cval.Field(3).Int())
eq(t, rval.Field(4).Int(), cval.Field(4).Int())
rfield := cval.Field(2)
cfield := cval.Field(2)
eq(t, rfield.Len(), cfield.Len())
for i := 0; i < cfield.Len(); i++ {
eq(t, rfield.Index(i).Int(), cfield.Index(i).Int())
}
// now decode back
vv := reflect.New(rval.Type())
dec := ffi.NewDecoder(cval)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
rval = vv.Elem()
eq(t, rval.Field(0).Int(), cval.Field(0).Int())
eq(t, rval.Field(1).Int(), cval.Field(1).Int())
eq(t, rval.Field(3).Int(), cval.Field(3).Int())
eq(t, rval.Field(4).Int(), cval.Field(4).Int())
rfield = cval.Field(2)
cfield = cval.Field(2)
eq(t, rfield.Len(), cfield.Len())
for i := 0; i < cfield.Len(); i++ {
eq(t, rfield.Index(i).Int(), cfield.Index(i).Int())
}
}
{
const val = 42
ctyp, err := ffi.NewArrayType(sz, ffi.C_int32)
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
gval := [sz]int32{
val, val, val, val, val,
val, val, val, val, val,
}
err = ffi.Associate(ctyp, reflect.TypeOf(gval))
if err != nil {
t.Errorf(err.Error())
}
enc := ffi.NewEncoder(cval)
err = enc.Encode(gval)
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Type().Len(); i++ {
eq(t, int64(val), cval.Index(i).Int())
}
// now decode back
vv := reflect.New(reflect.TypeOf(gval))
dec := ffi.NewDecoder(cval)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Type().Len(); i++ {
eq(t, vv.Elem().Index(i).Int(), cval.Index(i).Int())
}
}
{
const val = 42
ctyp, err := ffi.NewArrayType(sz, ffi.C_float)
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.New(ctyp)
gval := [sz]float32{
val, val, val, val, val,
val, val, val, val, val,
}
enc := ffi.NewEncoder(cval)
err = enc.Encode(gval)
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Type().Len(); i++ {
eq(t, float64(val), cval.Index(i).Float())
}
// now decode back
vv := reflect.New(reflect.TypeOf(gval))
dec := ffi.NewDecoder(cval)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Type().Len(); i++ {
eq(t, vv.Elem().Index(i).Float(), cval.Index(i).Float())
}
}
{
const val = 42
ctyp, err := ffi.NewSliceType(ffi.C_int32)
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.MakeSlice(ctyp, sz, sz)
gval := []int32{
val, val, val, val, val,
val, val, val, val, val,
}
enc := ffi.NewEncoder(cval)
err = enc.Encode(gval)
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Len(); i++ {
eq(t, int64(val), cval.Index(i).Int())
}
// now decode back
vv := reflect.New(reflect.TypeOf(gval))
dec := ffi.NewDecoder(cval)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Len(); i++ {
eq(t, vv.Elem().Index(i).Int(), cval.Index(i).Int())
}
}
{
const val = 42
ctyp, err := ffi.NewSliceType(ffi.C_float)
if err != nil {
t.Errorf(err.Error())
}
cval := ffi.MakeSlice(ctyp, sz, sz)
gval := []float32{
val, val, val, val, val,
val, val, val, val, val,
}
enc := ffi.NewEncoder(cval)
err = enc.Encode(gval)
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Len(); i++ {
eq(t, float64(val), cval.Index(i).Float())
}
{
// now decode back
vv := reflect.New(reflect.TypeOf(gval))
dec := ffi.NewDecoder(cval)
err = dec.Decode(vv.Interface())
if err != nil {
t.Errorf(err.Error())
}
for i := 0; i < cval.Len(); i++ {
eq(t, vv.Elem().Index(i).Float(), cval.Index(i).Float())
}
}
}
}
func TestGetSetStructWithSliceValue(t *testing.T) {
const val = 42
arr10, err := ffi.NewArrayType(10, ffi.C_int32)
if err != nil {
t.Errorf(err.Error())
}
slityp, err := ffi.NewSliceType(ffi.C_int32)
if err != nil {
t.Errorf(err.Error())
}
ctyp, err := ffi.NewStructType(
"struct_sswsv",
[]ffi.Field{
{"F1", ffi.C_uint16},
{"F2", arr10},
{"F3", ffi.C_int32},
{"F4", ffi.C_uint16},
{"F5", slityp},
})
eq(t, "struct_sswsv", ctyp.Name())
eq(t, ffi.Struct, ctyp.Kind())
eq(t, 5, ctyp.NumField())
cval := ffi.New(ctyp)
eq(t, ctyp.Kind(), cval.Kind())
eq(t, ctyp.NumField(), cval.NumField())
eq(t, uint64(0), cval.Field(0).Uint())
for i := 0; i < arr10.Len(); i++ {
eq(t, int64(0), cval.Field(1).Index(i).Int())
}
eq(t, int64(0), cval.Field(2).Int())
eq(t, uint64(0), cval.Field(3).Uint())
eq(t, int(0), cval.Field(4).Len())
eq(t, int(0), cval.Field(4).Len())
goval := struct {
F1 uint16
F2 [10]int32
F3 int32
F4 uint16
F5 []int32
}{
F1: val,
F2: [10]int32{val, val, val, val, val,
val, val, val, val, val},
F3: val,
F4: val,
F5: make([]int32, 2, 3),
}
goval.F5[0] = val
goval.F5[1] = val
cval.SetValue(reflect.ValueOf(goval))
eq(t, uint64(val), cval.Field(0).Uint())
for i := 0; i < arr10.Len(); i++ {
eq(t, int64(val), cval.Field(1).Index(i).Int())
}
eq(t, int64(val), cval.Field(2).Int())
eq(t, uint64(val), cval.Field(3).Uint())
eq(t, int(2), cval.Field(4).Len())
// FIXME: should we get the 'cap' from go ?
eq(t, int( /*3*/ 2), cval.Field(4).Cap())
eq(t, int64(val), cval.Field(4).Index(0).Int())
eq(t, int64(val), cval.Field(4).Index(1).Int())
}
func TestNewStructType(t *testing.T) {
arr10, err := ffi.NewArrayType(10, ffi.C_int32)
if err != nil {
t.Errorf(err.Error())
}
eq(t, int(10), arr10.Len())
for _, table := range []struct {
name string
fields []ffi.Field
size uintptr
offsets []uintptr
}{
{"struct_0",
[]ffi.Field{{"a", ffi.C_int}},
ffi.C_int.Size(),
[]uintptr{0},
},
{"struct_1",
[]ffi.Field{
{"a", ffi.C_int},
{"b", ffi.C_int},
},
ffi.C_int.Size() + ffi.C_int.Size(),
[]uintptr{0, ffi.C_int.Size()},
},
{"struct_2",
[]ffi.Field{
{"F1", ffi.C_uint8},
{"F2", ffi.C_int16},
{"F3", ffi.C_int32},
{"F4", ffi.C_uint8},
},
12,
[]uintptr{0, 2, 4, 8},
},
//FIXME: 32b/64b alignement differ!!
// make 2 tests!
// {"struct_3",
// []ffi.Field{
// {"F1", ffi.C_uint8},
// {"F2", arr10},
// {"F3", ffi.C_int32},
// {"F4", ffi.C_uint8},
// },
// 56,
// []uintptr{0, 8, 48, 52},
// },
} {
typ, err := ffi.NewStructType(table.name, table.fields)
if err != nil {
t.Errorf(err.Error())
}
eq(t, table.name, typ.Name())
//eq(t, table.size, typ.Size())
if table.size != typ.Size() {
t.Errorf("expected size [%d] got [%d] (type=%q)", table.size, typ.Size(), table.name)
}
eq(t, len(table.offsets), typ.NumField())
for i := 0; i < typ.NumField(); i++ {
if table.offsets[i] != typ.Field(i).Offset {
t.Errorf("type=%q field=%d: expected offset [%d]. got [%d]", table.name, i, table.offsets[i], typ.Field(i).Offset)
}
//eq(t, table.offsets[i], typ.Field(i).Offset)
}
eq(t, ffi.Struct, typ.Kind())
}
// test type mismatch
n := "struct_type_err"
st, err := ffi.NewStructType(n, []ffi.Field{{"a", ffi.C_int}})
if err != nil {
t.Errorf(err.Error())
}
{
// check we get the exact same instance
st_dup, err := ffi.NewStructType(n, []ffi.Field{{"a", ffi.C_int}})
if err != nil {
t.Errorf(err.Error())
}
if !reflect.DeepEqual(st_dup, st) {
t.Errorf("NewStructType is not idem-potent")
}
}
{
_, err := ffi.NewStructType(
n,
[]ffi.Field{{"a", ffi.C_int}, {"b", ffi.C_int}})
if err == nil {
t.Errorf("failed to raise an error")
}
errmsg := fmt.Sprintf("ffi.NewStructType: inconsistent re-declaration of [%s]", n)
if err.Error() != errmsg {
t.Errorf("failed to detect number of fields differ: %v", err)
}
}
{
_, err := ffi.NewStructType(n, []ffi.Field{{"b", ffi.C_int}})
if err == nil {
t.Errorf("failed to raise an error")
}
errmsg := fmt.Sprintf("ffi.NewStructType: inconsistent re-declaration of [%s] (field #0 name mismatch)", n)
if err.Error() != errmsg {
t.Errorf("failed to detect field-name mismatch: %v", err)
}
}
{
_, err := ffi.NewStructType(n, []ffi.Field{{"a", ffi.C_uint}})
if err == nil {
t.Errorf("failed to raise an error")
}
errmsg := fmt.Sprintf("ffi.NewStructType: inconsistent re-declaration of [%s] (field #0 type mismatch)", n)
if err.Error() != errmsg {
t.Errorf("failed to detect field-type mismatch: %v", err)
}
}
}