39 lines
868 B
Go
39 lines
868 B
Go
package mq_coder
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import (
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"git.hpds.cc/Component/mq_coder/utils"
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)
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// Tag represents the Tag of TLV,
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// MSB used to represent the packet type, 0x80 means a node packet, otherwise is a primitive packet.
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// Low 7 bits represent Sequence ID, like `key` in JSON format
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type Tag struct {
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raw byte
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}
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// IsNode returns true is MSB is 1.
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func (t *Tag) IsNode() bool {
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return t.raw&utils.MSB == utils.MSB
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}
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// IsSlice determine if the current node is a Slice
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func (t *Tag) IsSlice() bool {
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return t.raw&utils.SliceFlag == utils.SliceFlag
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}
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// SeqId get the sequence ID, as key in JSON format
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func (t *Tag) SeqId() byte {
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//return t.raw & packet utils.DropMSB
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return t.raw & utils.DropMSBArrayFlag
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}
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// NewTag create a NodePacket Tag field
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func NewTag(b byte) *Tag {
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return &Tag{raw: b}
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}
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// Raw return the original byte
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func (t *Tag) Raw() byte {
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return t.raw
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}
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