mirror of https://github.com/cloudreve/Cloudreve
87 lines
1.7 KiB
Go
87 lines
1.7 KiB
Go
package boolset
|
|
|
|
import (
|
|
"database/sql/driver"
|
|
"encoding/base64"
|
|
"errors"
|
|
"golang.org/x/exp/constraints"
|
|
)
|
|
|
|
var (
|
|
ErrValueNotSupported = errors.New("value not supported")
|
|
)
|
|
|
|
type BooleanSet []byte
|
|
|
|
// FromString convert from base64 encoded boolset.
|
|
func FromString(data string) (*BooleanSet, error) {
|
|
raw, err := base64.StdEncoding.DecodeString(data)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
b := BooleanSet(raw)
|
|
return &b, nil
|
|
}
|
|
|
|
func (b *BooleanSet) UnmarshalBinary(data []byte) error {
|
|
*b = make(BooleanSet, len(data))
|
|
copy(*b, data)
|
|
return nil
|
|
}
|
|
|
|
func (b *BooleanSet) MarshalBinary() (data []byte, err error) {
|
|
return *b, nil
|
|
}
|
|
|
|
func (b *BooleanSet) String() (data string, err error) {
|
|
raw, err := b.MarshalBinary()
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
|
|
return base64.StdEncoding.EncodeToString(raw), nil
|
|
}
|
|
|
|
func (b *BooleanSet) Enabled(flag int) bool {
|
|
if flag >= len(*b)*8 {
|
|
return false
|
|
}
|
|
|
|
return (*b)[flag/8]&(1<<uint(flag%8)) != 0
|
|
}
|
|
|
|
// Value implements the driver.Valuer method.
|
|
func (b *BooleanSet) Value() (driver.Value, error) {
|
|
return b.MarshalBinary()
|
|
}
|
|
|
|
// Scan implements the sql.Scanner method.
|
|
func (b *BooleanSet) Scan(src any) error {
|
|
srcByte, ok := src.([]byte)
|
|
if !ok {
|
|
return ErrValueNotSupported
|
|
}
|
|
return b.UnmarshalBinary(srcByte)
|
|
}
|
|
|
|
// Sets set BooleanSet values in batch.
|
|
func Sets[T constraints.Integer](val map[T]bool, bs *BooleanSet) {
|
|
for flag, v := range val {
|
|
Set(flag, v, bs)
|
|
}
|
|
}
|
|
|
|
// Set sets a BooleanSet value.
|
|
func Set[T constraints.Integer](flag T, enabled bool, bs *BooleanSet) {
|
|
if len(*bs) < int(flag/8)+1 {
|
|
*bs = append(*bs, make([]byte, int(flag/8)+1-len(*bs))...)
|
|
}
|
|
|
|
if enabled {
|
|
(*bs)[flag/8] |= 1 << uint(flag%8)
|
|
} else {
|
|
(*bs)[flag/8] &= ^(1 << uint(flag%8))
|
|
}
|
|
}
|