75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
package pgproto3
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import (
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"bytes"
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"encoding/json"
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"github.com/jackc/pgx/v5/internal/pgio"
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)
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type CommandComplete struct {
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CommandTag []byte
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}
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// Backend identifies this message as sendable by the PostgreSQL backend.
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func (*CommandComplete) Backend() {}
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// Decode decodes src into dst. src must contain the complete message with the exception of the initial 1 byte message
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// type identifier and 4 byte message length.
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func (dst *CommandComplete) Decode(src []byte) error {
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idx := bytes.IndexByte(src, 0)
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if idx == -1 {
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return &invalidMessageFormatErr{messageType: "CommandComplete", details: "unterminated string"}
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}
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if idx != len(src)-1 {
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return &invalidMessageFormatErr{messageType: "CommandComplete", details: "string terminated too early"}
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}
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dst.CommandTag = src[:idx]
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return nil
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}
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// Encode encodes src into dst. dst will include the 1 byte message type identifier and the 4 byte message length.
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func (src *CommandComplete) Encode(dst []byte) []byte {
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dst = append(dst, 'C')
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sp := len(dst)
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dst = pgio.AppendInt32(dst, -1)
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dst = append(dst, src.CommandTag...)
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dst = append(dst, 0)
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pgio.SetInt32(dst[sp:], int32(len(dst[sp:])))
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return dst
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}
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// MarshalJSON implements encoding/json.Marshaler.
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func (src CommandComplete) MarshalJSON() ([]byte, error) {
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return json.Marshal(struct {
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Type string
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CommandTag string
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}{
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Type: "CommandComplete",
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CommandTag: string(src.CommandTag),
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})
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}
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// UnmarshalJSON implements encoding/json.Unmarshaler.
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func (dst *CommandComplete) UnmarshalJSON(data []byte) error {
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// Ignore null, like in the main JSON package.
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if string(data) == "null" {
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return nil
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}
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var msg struct {
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CommandTag string
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}
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if err := json.Unmarshal(data, &msg); err != nil {
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return err
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}
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dst.CommandTag = []byte(msg.CommandTag)
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return nil
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}
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