mpvfs

 1package playlistfs
 2
 3import (
 4	"fmt"
 5	"strconv"
 6)
 7
 8type Volume struct {
 9	Levels []uint
10}
11
12func VolCmd(buf []byte) (*Volume, error) {
13	var vol Volume
14
15	fields, err := parseFields(buf, 2, -1)
16	if err != nil {
17		return nil, err
18	}
19
20	for _, field := range fields {
21		for i := 0; i < len(field); i++ {
22			data := field[i]
23			switch i {
24			case 0:
25				if data != "volume" {
26					return nil, ErrNoVol
27				}
28			default:
29				lvl, err := strconv.ParseUint(field[i], 10, 8)
30				if err != nil {
31					return nil, err
32				} else if lvl > 100 {
33					return nil, ErrInvalidVol
34				}
35
36				vol.Levels = append(vol.Levels, uint(lvl))
37			}
38		}
39	}
40
41	return &vol, nil
42}
43
44func (v *Volume) String() string {
45	numLvls := len(v.Levels)
46	if numLvls == 1 {
47		return fmt.Sprintf("volume %d", v.Levels[0])
48	}
49
50	var lvlSet string
51	for i, lvl := range v.Levels {
52		lvlSet += fmt.Sprintf("%d", lvl)
53		if i != numLvls {
54			lvlSet += " "
55		}
56	}
57
58	return fmt.Sprintf("volume '%s'", lvlSet)
59}