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readmultipleack.go
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readmultipleack.go
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package encoding
import (
"fmt"
"github.com/BeatTime/bacnet/btypes"
)
func (e *Encoder) ReadMultiplePropertyAck(invokeID uint8, data btypes.MultiplePropertyData) error {
a := btypes.APDU{
DataType: btypes.ComplexAck,
Service: btypes.ServiceConfirmedReadPropMultiple,
InvokeId: invokeID,
}
e.APDU(a)
err := e.objectsWithData(data.Objects)
if err != nil {
return err
}
return e.Error()
}
func (e *Encoder) objectsWithData(objects []btypes.Object) error {
var tag uint8
for _, obj := range objects {
tag = 0
e.contextObjectID(tag, obj.ID.Type, obj.ID.Instance)
// Tag 1 - Opening Tag
tag = 1
e.openingTag(tag)
e.propertiesWithData(obj.Properties)
// Tag 1 - Closing Tag
e.closingTag(tag)
}
return nil
}
func (e *Encoder) propertiesWithData(properties []btypes.Property) error {
var tag uint8
for _, prop := range properties {
// Tag 2 - Property ID
tag = 2
e.contextEnumerated(tag, uint32(prop.Type))
// Tag 3 (OPTIONAL) - Array Length
tag++
if prop.ArrayIndex != ArrayAll {
e.contextUnsigned(tag, prop.ArrayIndex)
}
// Tag 4 Opening Tag
tag++
openedTag := tag
e.openingTag(openedTag)
e.write(prop.Data)
e.closingTag(openedTag)
e.write(prop.Data)
}
return e.Error()
}
func (d *Decoder) ReadMultiplePropertyAck(data *btypes.MultiplePropertyData) error {
err := d.objectsWithData(&data.Objects)
if err != nil {
d.err = err
}
return d.Error()
}
func (d *Decoder) bacError(errorClass, errorCode *uint32) error {
data, err := d.AppData()
if err != nil {
return err
}
switch val := data.(type) {
case uint32:
*errorClass = val
default:
return fmt.Errorf("receive bacnet error of unknown type")
}
data, err = d.AppData()
if err != nil {
return err
}
switch val := data.(type) {
case uint32:
*errorCode = val
default:
return fmt.Errorf("receive bacnet error of unknown type")
}
return nil
}
func (d *Decoder) objectsWithData(objects *[]btypes.Object) error {
obj := btypes.Object{}
for d.Error() == nil && d.len() > 0 {
obj.Properties = []btypes.Property{}
// Tag 0 - Object ID
tag, meta, length := d.tagNumberAndValue()
if tag != 0 {
return &ErrorIncorrectTag{Expected: 0, Given: tag}
} else if !meta.isContextSpecific() {
return &ErrorWrongTagType{ContextTag}
}
obj.ID.Type, obj.ID.Instance = d.objectId()
// Tag 1 - Opening Tag
tag, meta = d.tagNumber()
if tag != 1 {
return &ErrorIncorrectTag{Expected: 1, Given: tag}
} else if !meta.isOpening() {
return &ErrorWrongTagType{OpeningTag}
}
// Tag 2 - Property Tag
tag, meta, length = d.tagNumberAndValue()
if tag != 2 {
return &ErrorIncorrectTag{Expected: 2, Given: tag}
}
for d.len() > 0 && tag == 2 && !meta.isClosing() {
if !meta.isContextSpecific() {
return &ErrorWrongTagType{ContextTag}
}
prop := btypes.Property{}
prop.Type = btypes.PropertyType(d.enumerated(int(length)))
// Tag 3 - (Optional) Array Length
tag, meta = d.tagNumber()
if tag == 2 {
continue
} else if tag == 3 {
if !meta.isContextSpecific() {
return &ErrorWrongTagType{ContextTag}
}
length = d.value(meta)
prop.ArrayIndex = d.unsigned(int(length))
// Move to the next tag
tag, meta = d.tagNumber()
} else {
prop.ArrayIndex = ArrayAll
}
// Tag 4 - Opening Tag
if tag == 4 && meta.isOpening() {
var array []interface{}
tag, meta = d.tagNumber()
if d.err != nil {
return d.err
}
for {
if meta.isContextSpecific() {
if meta.isClosing() {
_ = d.UnreadByte()
} else if meta.isOpening() {
if /*prop.Type == btypes.PROP_EVENT_TIME_STAMPS &&*/ tag == btypes.TimeStampDatetime {
dt := &btypes.DataTime{}
for {
tag, meta, length = d.tagNumberAndValue()
if meta.isClosing() && tag == btypes.TimeStampDatetime {
break
} else if tag == tagDate {
d.date(&dt.Date, int(length))
} else if tag == tagTime {
d.time(&dt.Time, int(length))
} else if length > 0 {
d.Skip(length)
}
}
array = append(array, dt)
}
} else {
// TODO how to parse it in Context???
*objects = append(*objects, obj)
//return nil
lenValue := d.value(meta)
tag = tagTypeInContext(prop.Type, tag)
if tag == maxTag {
//skip unknown type
if lenValue > 0 {
if _, err := d.Read(make([]byte, lenValue)); err != nil {
return err
}
}
} else {
data, err := d.AppDataOfTag(tag, int(lenValue))
if err != nil {
return err
}
array = append(array, data)
}
}
} else {
data, err := d.AppDataOfTag(tag, int(d.value(meta)))
if err != nil {
return err
}
array = append(array, data)
}
tag, meta = d.tagNumber()
if meta.isClosing() && tag == 4 { //tag 4
//
break
} /*else {
_ = d.UnreadByte()
}*/
}
if len(array) == 1 {
prop.Data = array[0]
} else {
prop.Data = array
}
obj.Properties = append(obj.Properties, prop)
tag, meta, length = d.tagNumberAndValue()
} else if tag == 5 && meta.isOpening() {
//Tag 5 error
var class, code uint32
err := d.bacError(&class, &code)
if err != nil {
return err
}
tag, meta = d.tagNumber()
if tag == 5 && meta.isClosing() {
//
}
return fmt.Errorf("class %d code %d", class, code)
} else {
return &ErrorIncorrectTag{Expected: 4, Given: tag}
}
}
*objects = append(*objects, obj)
}
return d.Error()
}