1. 1
2. 2
3. 3
4. 4
5. 5
6. 6
7. 7
8. 8
9. 9
10. 10
11. 11
12. 12
13. 13
14. 14
15. 15
16. 16
17. 17
18. 18
19. 19
20. 20
21. 21
22. 22
23. 23
24. 24
25. 25
26. 26
27. 27
28. 28
29. 29
30. 30
31. 31
32. 32
33. 33
34. 34
35. 35
36. 36
37. 37
38. 38
39. 39
40. 40
41. 41
42. 42
43. 43
44. 44
45. 45
46. 46
47. 47
48. 48
49. 49
50. 50
51. 51
52. 52
53. 53
54. 54
55. 55
56. 56
57. 57
58. 58
59. 59
60. 60
61. 61
62. 62

//  Copyright (c) 2017 Couchbase, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// 		http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package regexp

import "fmt"

// instOp represents a instruction operation
type instOp int

// the enumeration of operations
const (
	OpMatch instOp = iota
	OpJmp
	OpSplit
	OpRange
)

// instSize is the approximate size of the an inst struct in bytes
const instSize = 40

type inst struct {
	op         instOp
	to         uint
	splitA     uint
	splitB     uint
	rangeStart byte
	rangeEnd   byte
}

func (i *inst) String() string {
	switch i.op {
	case OpJmp:
		return fmt.Sprintf("JMP: %d", i.to)
	case OpSplit:
		return fmt.Sprintf("SPLIT: %d - %d", i.splitA, i.splitB)
	case OpRange:
		return fmt.Sprintf("RANGE: %x - %x", i.rangeStart, i.rangeEnd)
	}
	return "MATCH"
}

type prog []*inst

func (p prog) String() string {
	rv := "\n"
	for i, pi := range p {
		rv += fmt.Sprintf("%d %v\n", i, pi)
	}
	return rv
}