func dumpArray(buf *bytes.Buffer, x C.jv) {
ct := C.jv_array_length(C.jv_copy(x))
buf.WriteRune('[')
defer buf.WriteRune(']')
for i := C.int(0); i < ct; i++ {
val := C.jv_array_get(C.jv_copy(x), i)
if i > 0 {
buf.WriteRune(',')
}
dumpValue(buf, val)
C.jv_free(val)
}
}
func dumpString(buf *bytes.Buffer, x C.jv) {
ptr := C.jv_string_value(x)
ct := C.jv_string_length_bytes(C.jv_copy(x))
p, err := json.Marshal(C.GoStringN(ptr, ct))
if err != nil {
panic(err)
}
buf.Write(p)
}
func dumpObject(buf *bytes.Buffer, x C.jv) {
keys := C.jv_keys(C.jv_copy(x))
defer C.jv_free(keys)
ct := C.jv_array_length(C.jv_copy(keys))
buf.WriteRune('{')
defer buf.WriteRune('}')
for i := C.int(0); i < ct; i++ {
key := C.jv_array_get(C.jv_copy(keys), i)
if i > 0 {
buf.WriteRune(',')
}
dumpString(buf, key)
buf.WriteRune(':')
val := C.jv_object_get(C.jv_copy(x), key)
dumpValue(buf, val)
C.jv_free(val)
}
}
func jvToGo(value C.jv) interface{} {
switch C.jv_get_kind(value) {
case C.JV_KIND_INVALID:
return errors.New("invalid")
case C.JV_KIND_NULL:
return nil
case C.JV_KIND_FALSE:
return false
case C.JV_KIND_TRUE:
return true
case C.JV_KIND_NUMBER:
number := C.jv_number_value(value)
if C.jv_is_integer(value) == 0 {
return float64(number)
} else {
return int(number)
}
case C.JV_KIND_STRING:
return C.GoString(C.jv_string_value(value))
case C.JV_KIND_ARRAY:
length := C.jv_array_length(C.jv_copy(value))
arr := make([]interface{}, length)
for i := range arr {
arr[i] = jvToGo(C.jv_array_get(C.jv_copy(value), C.int(i)))
}
return arr
case C.JV_KIND_OBJECT:
result := make(map[string]interface{})
var k, v C.jv
for jv_i := C.jv_object_iter(value); C.jv_object_iter_valid(value, jv_i) != 0; jv_i = C.jv_object_iter_next(value, jv_i) {
k = C.jv_object_iter_key(value, jv_i)
v = C.jv_object_iter_value(value, jv_i)
result[C.GoString(C.jv_string_value(k))] = jvToGo(v)
}
return result
default:
return errors.New("unknown type")
}
}
func goToJv(v interface{}) C.jv {
if v == nil {
return C.jv_null()
}
value := reflect.Indirect(reflect.ValueOf(v))
switch value.Type().Kind() {
case reflect.Bool:
if value.Bool() {
return C.jv_true()
} else {
return C.jv_false()
}
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
return C.jv_number(C.double(value.Int()))
// TODO reflect.Uintptr?
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
return C.jv_number(C.double(value.Uint()))
case reflect.Float32, reflect.Float64:
return C.jv_number(C.double(value.Float()))
case reflect.String:
return C.jv_string(C.CString(value.String()))
case reflect.Array, reflect.Slice:
n := value.Len()
arr := C.jv_array_sized(C.int(n))
for i := 0; i < n; i++ {
item := goToJv(value.Index(i).Interface())
arr = C.jv_array_set(C.jv_copy(arr), C.int(i), item)
}
return arr
case reflect.Map:
// TODO assert key is string?
object := C.jv_object()
for _, k := range value.MapKeys() {
key := goToJv(k.Interface())
mapValue := goToJv(value.MapIndex(k).Interface())
object = C.jv_object_set(object, key, mapValue)
}
return object
}
msg := fmt.Sprintf("unknown type for: %v", value.Interface())
return C.jv_invalid_with_msg(C.jv_string(C.CString(msg)))
}
// Copy returns a *Jv so that the original won't get freed.
//
// Does not consume the invocant.
func (jv *Jv) Copy() *Jv {
C.jv_copy(jv.jv)
// Becasue jv uses ref counting under the hood we can return the same value
return jv
}