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      1 # ASN.1 named integers
      2 from pyasn1 import error
      3 
      4 __all__ = [ 'NamedValues' ]
      5 
      6 class NamedValues:
      7     def __init__(self, *namedValues):
      8         self.nameToValIdx = {}; self.valToNameIdx = {}
      9         self.namedValues = ()        
     10         automaticVal = 1
     11         for namedValue in namedValues:
     12             if isinstance(namedValue, tuple):
     13                 name, val = namedValue
     14             else:
     15                 name = namedValue
     16                 val = automaticVal
     17             if name in self.nameToValIdx:
     18                 raise error.PyAsn1Error('Duplicate name %s' % (name,))
     19             self.nameToValIdx[name] = val
     20             if val in self.valToNameIdx:
     21                 raise error.PyAsn1Error('Duplicate value %s=%s' % (name, val))
     22             self.valToNameIdx[val] = name
     23             self.namedValues = self.namedValues + ((name, val),)
     24             automaticVal = automaticVal + 1
     25     def __str__(self): return str(self.namedValues)
     26     
     27     def getName(self, value):
     28         if value in self.valToNameIdx:
     29             return self.valToNameIdx[value]
     30 
     31     def getValue(self, name):
     32         if name in self.nameToValIdx:
     33             return self.nameToValIdx[name]
     34     
     35     def __getitem__(self, i): return self.namedValues[i]
     36     def __len__(self): return len(self.namedValues)
     37 
     38     def __add__(self, namedValues):
     39         return self.__class__(*self.namedValues + namedValues)
     40     def __radd__(self, namedValues):
     41         return self.__class__(*namedValues + tuple(self))
     42         
     43     def clone(self, *namedValues):
     44         return self.__class__(*tuple(self) + namedValues)
     45 
     46 # XXX clone/subtype?
     47