def __init__(self, name, lengthfield, fieldtype):
'''
Initialize the array with the given *name*, a *lengthfield* for the
counter field and *fieldtype* for a single argument function
that will return a new array member. The single argument is a
reference to the top-level root :mod:`Container` field where the
array belongs to.
'''
Structure.__init__(self, name)
self.__length = lengthfield
self.__fieldtype = fieldtype
Structure.append(self, self.__length)
def __init__(self, name, lengthfield, fieldtype):
'''
Initialize the array with the given *name*, a *lengthfield* for the
counter field and *fieldtype* for a single argument function
that will return a new array member. The single argument is a
reference to the top-level root :mod:`Container` field where the
array belongs to.
'''
Structure.__init__(self, name)
self.__length = lengthfield
self.__fieldtype = fieldtype
Structure.append(self, self.__length)
def __init__(self, name, lengthfield, wordsize = 1):
'''
Initialize the field with the given *name* and a
*lengthfield*. The *lengthfield* must be a numeric field
instance. *wordsize* specifies how many bytes a word contains
and it can be a numeric value or a unary function that knows
where to get the word size, it has a default value of 1. So, the
total length in bytes of a :mod:`Data` field is the length field
multiplied by the word size. If *wordsize* is a function, it
takes the top-level root :mod:`Container` field as a single
argument. This way, it is possible to provide a word size that
depends on the value of another field.
'''
Structure.__init__(self, name)
self.__wordsize = wordsize
wsizefunc = lambda root: \
lengthfield.value() * param_call(wordsize, root)
self.__length = lengthfield
self.__data = String("Data", wsizefunc)
Structure.append(self, self.__length)
Structure.append(self, self.__data)
