/
DefineScalingGrid.go
102 lines (77 loc) · 1.71 KB
/
DefineScalingGrid.go
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package swf
import (
"bytes"
"fmt"
"io"
)
type DefineScalingGrid struct {
Tag *Uint16
Extended *Uint32
data *bytes.Buffer
}
func (v *DefineScalingGrid) TagCode() TagCode {
return DefineScalingGridTagCode
}
func (v *DefineScalingGrid) String() string {
if v == nil {
return "<nil>"
}
return fmt.Sprintf("DefineScalingGrid{%d bytes}", len(v.data.Bytes()))
}
func (v *DefineScalingGrid) Bytes() []byte {
if v == nil {
return nil
}
var data []byte
if v.Tag != nil {
data = append(data, v.Tag.Bytes()...)
}
if v.Extended != nil {
data = append(data, v.Extended.Bytes()...)
}
if v.data != nil {
data = append(data, v.data.Bytes()...)
}
return data
}
func (v *DefineScalingGrid) Serialize() ([]byte, error) {
if v == nil {
return nil, fmt.Errorf("cannot serialize because DefineScalingGrid is nil")
}
var data []byte
tagData, err := v.Tag.Serialize()
if err != nil {
return nil, err
}
extendedData, err := v.Extended.Serialize()
if err != nil {
return nil, err
}
data = append(data, tagData...)
data = append(data, extendedData...)
data = append(data, v.data.Bytes()...)
return data, nil
}
func ParseDefineScalingGrid(src io.Reader, tag *Uint16, extended *Uint32) (*DefineScalingGrid, error) {
if tag == nil {
return nil, fmt.Errorf("cannot parse because tag is nil")
}
length := int64(tag.Value & 0b111111)
if extended != nil {
length = int64(extended.Value)
}
data := &bytes.Buffer{}
dataLength, err := io.CopyN(data, src, length)
if err != nil {
return nil, err
}
if dataLength != length {
return nil, fmt.Errorf("broken DefineScalingGrid")
}
result := &DefineScalingGrid{
Tag: tag,
Extended: extended,
data: data,
}
return result, nil
}