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package logs
import (
"fmt"
"io"
"strings"
)
type EntryObj interface {
encode() Entry
}
const EntrySize = 34
type Entry [EntrySize]byte
func (e Entry) Type() EntryType {
return EntryType(e[0])
}
type EntryBinary struct{}
func (EntryBinary) Append(dest []byte, e *Entry) []byte {
return append(dest, e[:]...)
}
func (EntryBinary) ReadAt(dest *Entry, r io.ReaderAt, at int64) (n int, err error) {
return r.ReadAt(dest[:], at)
}
func (EntryBinary) EntrySize() int {
return EntrySize
}
type EntryTypeFlag uint8
const (
FlagSearchCheckpoint EntryTypeFlag = 1 << TypeSearchCheckpoint
FlagCanonicalHash EntryTypeFlag = 1 << TypeCanonicalHash
FlagInitiatingEvent EntryTypeFlag = 1 << TypeInitiatingEvent
FlagExecutingLink EntryTypeFlag = 1 << TypeExecutingLink
FlagExecutingCheck EntryTypeFlag = 1 << TypeExecutingCheck
FlagPadding EntryTypeFlag = 1 << TypePadding
// for additional padding
FlagPadding2 EntryTypeFlag = FlagPadding << 1
)
func (x EntryTypeFlag) String() string {
var out []string
for i := EntryTypeFlag(1); i != 0; i <<= 1 { // iterate to bitmask
if x.Any(i) {
out = append(out, i.String())
}
}
return strings.Join(out, "|")
}
func (x EntryTypeFlag) Any(v EntryTypeFlag) bool {
return x&v != 0
}
func (x *EntryTypeFlag) Add(v EntryTypeFlag) {
*x = *x | v
}
func (x *EntryTypeFlag) Remove(v EntryTypeFlag) {
*x = *x &^ v
}
type EntryType uint8
const (
TypeSearchCheckpoint EntryType = iota
TypeCanonicalHash
TypeInitiatingEvent
TypeExecutingLink
TypeExecutingCheck
TypePadding
)
func (x EntryType) String() string {
switch x {
case TypeSearchCheckpoint:
return "searchCheckpoint"
case TypeCanonicalHash:
return "canonicalHash"
case TypeInitiatingEvent:
return "initiatingEvent"
case TypeExecutingLink:
return "executingLink"
case TypeExecutingCheck:
return "executingCheck"
case TypePadding:
return "padding"
default:
return fmt.Sprintf("unknown-%d", uint8(x))
}
}