youtubebeat/vendor/github.com/gobwas/glob/match/prefix.go

50 lines
810 B
Go

package match
import (
"fmt"
"strings"
"unicode/utf8"
)
type Prefix struct {
Prefix string
}
func NewPrefix(p string) Prefix {
return Prefix{p}
}
func (self Prefix) Index(s string) (int, []int) {
idx := strings.Index(s, self.Prefix)
if idx == -1 {
return -1, nil
}
length := len(self.Prefix)
var sub string
if len(s) > idx+length {
sub = s[idx+length:]
} else {
sub = ""
}
segments := acquireSegments(len(sub) + 1)
segments = append(segments, length)
for i, r := range sub {
segments = append(segments, length+i+utf8.RuneLen(r))
}
return idx, segments
}
func (self Prefix) Len() int {
return lenNo
}
func (self Prefix) Match(s string) bool {
return strings.HasPrefix(s, self.Prefix)
}
func (self Prefix) String() string {
return fmt.Sprintf("<prefix:%s>", self.Prefix)
}