1package dns
2
3// StringToType is the reverse of TypeToString, needed for string parsing.
4var StringToType = reverseInt16(TypeToString)
5
6// StringToClass is the reverse of ClassToString, needed for string parsing.
7var StringToClass = reverseInt16(ClassToString)
8
9// StringToOpcode is a map of opcodes to strings.
10var StringToOpcode = reverseInt(OpcodeToString)
11
12// StringToRcode is a map of rcodes to strings.
13var StringToRcode = reverseInt(RcodeToString)
14
15func init() {
16	// Preserve previous NOTIMP typo, see github.com/miekg/dns/issues/733.
17	StringToRcode["NOTIMPL"] = RcodeNotImplemented
18}
19
20// StringToAlgorithm is the reverse of AlgorithmToString.
21var StringToAlgorithm = reverseInt8(AlgorithmToString)
22
23// StringToHash is a map of names to hash IDs.
24var StringToHash = reverseInt8(HashToString)
25
26// StringToCertType is the reverseof CertTypeToString.
27var StringToCertType = reverseInt16(CertTypeToString)
28
29// Reverse a map
30func reverseInt8(m map[uint8]string) map[string]uint8 {
31	n := make(map[string]uint8, len(m))
32	for u, s := range m {
33		n[s] = u
34	}
35	return n
36}
37
38func reverseInt16(m map[uint16]string) map[string]uint16 {
39	n := make(map[string]uint16, len(m))
40	for u, s := range m {
41		n[s] = u
42	}
43	return n
44}
45
46func reverseInt(m map[int]string) map[string]int {
47	n := make(map[string]int, len(m))
48	for u, s := range m {
49		n[s] = u
50	}
51	return n
52}
53