glob/match/prefix_suffix.go

53 lines
943 B
Go

package match
import (
"fmt"
"strings"
)
type PrefixSuffix struct {
Prefix, Suffix string
}
func (self PrefixSuffix) Index(s string) (int, []int) {
prefixIdx := strings.Index(s, self.Prefix)
if prefixIdx == -1 {
return -1, nil
}
var segments []int
for sub := s[prefixIdx:]; ; {
suffixIdx := strings.LastIndex(sub, self.Suffix)
if suffixIdx == -1 {
break
}
segments = append(segments, suffixIdx+len(self.Suffix))
sub = s[:suffixIdx]
}
segLen := len(segments)
if segLen == 0 {
return -1, nil
}
resp := make([]int, segLen)
for i, s := range segments {
resp[segLen-i-1] = s
}
return prefixIdx, resp
}
func (self PrefixSuffix) Len() int {
return lenNo
}
func (self PrefixSuffix) Match(s string) bool {
return strings.HasPrefix(s, self.Prefix) && strings.HasSuffix(s, self.Suffix)
}
func (self PrefixSuffix) String() string {
return fmt.Sprintf("<prefix_suffix:[%s,%s]>", self.Prefix, self.Suffix)
}