1 package match
2
3 import (
4 "fmt"
5 "unicode/utf8"
6 )
7
8 type Min struct {
9 Limit int
10 }
11
12 func NewMin(l int) Min {
13 return Min{l}
14 }
15
16 func (self Min) Match(s string) bool {
17 var l int
18 for range s {
19 l += 1
20 if l >= self.Limit {
21 return true
22 }
23 }
24
25 return false
26 }
27
28 func (self Min) Index(s string) (int, []int) {
29 var count int
30
31 c := len(s) - self.Limit + 1
32 if c <= 0 {
33 return -1, nil
34 }
35
36 segments := acquireSegments(c)
37 for i, r := range s {
38 count++
39 if count >= self.Limit {
40 segments = append(segments, i+utf8.RuneLen(r))
41 }
42 }
43
44 if len(segments) == 0 {
45 return -1, nil
46 }
47
48 return 0, segments
49 }
50
51 func (self Min) Len() int {
52 return lenNo
53 }
54
55 func (self Min) String() string {
56 return fmt.Sprintf("<min:%d>", self.Limit)
57 }
58
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