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lib/transform/cmap.go
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albertony
lib/transform: avoid empty charmap entry
19 июн 2025, 09:04
19 июн 2025, 09:04
62a9727
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package transform import ( "fmt" "strings" "sync" "github.com/rclone/rclone/fs" "golang.org/x/text/encoding/charmap" ) var ( cmaps = map[int]*charmap.Charmap{} lock sync.Mutex ) // CharmapChoices is an enum of the character map choices. type CharmapChoices = fs.Enum[cmapChoices] type cmapChoices struct{} func (cmapChoices) Choices() []string { choices := []string{} i := 0 for _, enc := range charmap.All { c, ok := enc.(*charmap.Charmap) if !ok { continue } name := strings.ReplaceAll(c.String(), " ", "-") if name == "" { name = fmt.Sprintf("unknown-%d", i) } lock.Lock() cmaps[i] = c lock.Unlock() choices = append(choices, name) i++ } return choices } func (cmapChoices) Type() string { return "string" } func charmapByID(cm fs.Enum[cmapChoices]) *charmap.Charmap { lock.Lock() c, ok := cmaps[int(cm)] lock.Unlock() if ok { return c } return nil } func encodeWithReplacement(s string, cmap *charmap.Charmap) string { return strings.Map(func(r rune) rune { b, ok := cmap.EncodeRune(r) if !ok { return '_' } return cmap.DecodeByte(b) }, s) } func toASCII(s string) string { return strings.Map(func(r rune) rune { if r <= 127 { return r } return -1 }, s) }