glob/match/range.go

48 lines
772 B
Go

package match
import (
"fmt"
"unicode/utf8"
)
type Range struct {
Lo, Hi rune
Not bool
}
// todo make factory
// todo make range table inside factory
func (self Range) Len() int {
return lenOne
}
func (self Range) Match(s string) bool {
r, w := utf8.DecodeRuneInString(s)
if len(s) > w {
return false
}
inRange := r >= self.Lo && r <= self.Hi
return inRange == !self.Not
}
func (self Range) Index(s string, segments []int) (int, []int) {
for i, r := range s {
if self.Not != (r >= self.Lo && r <= self.Hi) {
return i, append(segments, utf8.RuneLen(r))
}
}
return -1, nil
}
func (self Range) String() string {
var not string
if self.Not {
not = "!"
}
return fmt.Sprintf("<range:%s[%s,%s]>", not, string(self.Lo), string(self.Hi))
}