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|
package packetentity
import (
"github.com/osm/quake/common/buffer"
"github.com/osm/quake/common/context"
"github.com/osm/quake/packet/command/packetentitydelta"
"github.com/osm/quake/protocol"
"github.com/osm/quake/protocol/fte"
)
type Command struct {
FTEProtocolExtension uint32
Bits uint16
MoreBits byte
EvenMoreBits byte
PacketEntityDelta *packetentitydelta.Command
}
func (cmd *Command) Bytes() []byte {
buf := buffer.New()
buf.PutUint16(cmd.Bits)
if cmd.Bits == 0 {
goto end
}
if cmd.Bits&protocol.URemove != 0 {
if cmd.Bits&protocol.UMoreBits != 0 &&
cmd.FTEProtocolExtension&fte.ExtensionEntityDbl != 0 {
buf.PutByte(cmd.MoreBits)
if cmd.MoreBits&fte.UEvenMore != 0 {
buf.PutByte(cmd.EvenMoreBits)
}
}
goto end
}
if cmd.PacketEntityDelta != nil {
buf.PutBytes(cmd.PacketEntityDelta.Bytes())
}
end:
return buf.Bytes()
}
func Parse(ctx *context.Context, buf *buffer.Buffer) ([]*Command, error) {
var err error
var cmds []*Command
for {
var cmd Command
cmd.FTEProtocolExtension = ctx.GetFTEProtocolExtension()
if cmd.Bits, err = buf.GetUint16(); err != nil {
return nil, err
}
if cmd.Bits == 0 {
break
}
if cmd.Bits&protocol.URemove != 0 {
if cmd.Bits&protocol.UMoreBits != 0 &&
cmd.FTEProtocolExtension&fte.ExtensionEntityDbl != 0 {
if cmd.MoreBits, err = buf.ReadByte(); err != nil {
return nil, err
}
if cmd.MoreBits&fte.UEvenMore != 0 {
if cmd.EvenMoreBits, err = buf.ReadByte(); err != nil {
return nil, err
}
}
}
goto next
}
cmd.PacketEntityDelta, err = packetentitydelta.Parse(ctx, buf, cmd.Bits)
if err != nil {
return nil, err
}
next:
cmds = append(cmds, &cmd)
}
return cmds, nil
}
|
