github.com/MetalBlockchain/metalgo@v1.11.9/utils/compression/type.go (about)

     1  // Copyright (C) 2019-2024, Ava Labs, Inc. All rights reserved.
     2  // See the file LICENSE for licensing terms.
     3  
     4  package compression
     5  
     6  import (
     7  	"errors"
     8  	"strings"
     9  )
    10  
    11  var errUnknownCompressionType = errors.New("unknown compression type")
    12  
    13  type Type byte
    14  
    15  const (
    16  	TypeNone Type = iota + 1
    17  	TypeZstd
    18  )
    19  
    20  func (t Type) String() string {
    21  	switch t {
    22  	case TypeNone:
    23  		return "none"
    24  	case TypeZstd:
    25  		return "zstd"
    26  	default:
    27  		return "unknown"
    28  	}
    29  }
    30  
    31  func TypeFromString(s string) (Type, error) {
    32  	switch s {
    33  	case TypeNone.String():
    34  		return TypeNone, nil
    35  	case TypeZstd.String():
    36  		return TypeZstd, nil
    37  	default:
    38  		return TypeNone, errUnknownCompressionType
    39  	}
    40  }
    41  
    42  func (t Type) MarshalJSON() ([]byte, error) {
    43  	var b strings.Builder
    44  	if _, err := b.WriteString(`"`); err != nil {
    45  		return nil, err
    46  	}
    47  	if _, err := b.WriteString(t.String()); err != nil {
    48  		return nil, err
    49  	}
    50  	if _, err := b.WriteString(`"`); err != nil {
    51  		return nil, err
    52  	}
    53  	return []byte(b.String()), nil
    54  }