1 package match
2
3 import (
4 "fmt"
5 )
6
7 type Row struct {
8 Matchers Matchers
9 RunesLength int
10 Segments []int
11 }
12
13 func NewRow(len int, m ...Matcher) Row {
14 return Row{
15 Matchers: Matchers(m),
16 RunesLength: len,
17 Segments: []int{len},
18 }
19 }
20
21 func (self Row) matchAll(s string) bool {
22 var idx int
23 for _, m := range self.Matchers {
24 length := m.Len()
25
26 var next, i int
27 for next = range s[idx:] {
28 i++
29 if i == length {
30 break
31 }
32 }
33
34 if i < length || !m.Match(s[idx:idx+next+1]) {
35 return false
36 }
37
38 idx += next + 1
39 }
40
41 return true
42 }
43
44 func (self Row) lenOk(s string) bool {
45 var i int
46 for range s {
47 i++
48 if i > self.RunesLength {
49 return false
50 }
51 }
52 return self.RunesLength == i
53 }
54
55 func (self Row) Match(s string) bool {
56 return self.lenOk(s) && self.matchAll(s)
57 }
58
59 func (self Row) Len() (l int) {
60 return self.RunesLength
61 }
62
63 func (self Row) Index(s string) (int, []int) {
64 for i := range s {
65 if len(s[i:]) < self.RunesLength {
66 break
67 }
68 if self.matchAll(s[i:]) {
69 return i, self.Segments
70 }
71 }
72 return -1, nil
73 }
74
75 func (self Row) String() string {
76 return fmt.Sprintf("<row_%d:[%s]>", self.RunesLength, self.Matchers)
77 }
78
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