76 def CalcSize(fmt):  argument
77   if "A" in fmt:
78     fmt = fmt.replace("A", "s")
80   fmt = (re.split('\d+$', fmt)[0])
81   return struct.calcsize(fmt)
83 def CalcNumElements(fmt):  argument
84   prevlen = len(fmt)
85   fmt = fmt.replace("S", "")
86   numstructs = prevlen - len(fmt)
87   size = CalcSize(fmt)
88   elements = struct.unpack(fmt, b"\x00" * size)
92 def Struct(name, fmt, fieldnames, substructs={}):  argument
124     for i in range(len(fmt)):
125       if fmt[i] == "S":
127         index = CalcNumElements(fmt[:i])
131       elif fmt[i] == "A":
133         index = CalcNumElements(fmt[:i])
138         _format += fmt[i]
157                        % (fmt, numfields, fieldnames, len(_fieldnames)))