reverse.go

Documentation: github.com/miekg/dns

     1  package dns
     2  
     3  // StringToType is the reverse of TypeToString, needed for string parsing.
     4  var StringToType = reverseInt16(TypeToString)
     5  
     6  // StringToClass is the reverse of ClassToString, needed for string parsing.
     7  var StringToClass = reverseInt16(ClassToString)
     8  
     9  // StringToOpcode is a map of opcodes to strings.
    10  var StringToOpcode = reverseInt(OpcodeToString)
    11  
    12  // StringToRcode is a map of rcodes to strings.
    13  var StringToRcode = reverseInt(RcodeToString)
    14  
    15  func 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.
    21  var StringToAlgorithm = reverseInt8(AlgorithmToString)
    22  
    23  // StringToHash is a map of names to hash IDs.
    24  var StringToHash = reverseInt8(HashToString)
    25  
    26  // StringToCertType is the reverseof CertTypeToString.
    27  var StringToCertType = reverseInt16(CertTypeToString)
    28  
    29  // Reverse a map
    30  func 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  
    38  func 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  
    46  func 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
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