somestuff added

1 files changed, 282 insertions, 0 deletions

diff --git a/creditcards/Struct.py b/creditcards/Struct.py
new file mode 100644
index 0000000..b9ef147
--- /dev/null
+++ b/creditcards/Struct.py
@@ -0,0 +1,282 @@
+import struct, sys
+
+class StructType(tuple):
+	def __getitem__(self, value):
+		return [self] * value
+	def __call__(self, value, endian='<'):
+		if isinstance(value, str):
+			return struct.unpack(endian + tuple.__getitem__(self, 0), value[:tuple.__getitem__(self, 1)])[0]
+		else:
+			return struct.pack(endian + tuple.__getitem__(self, 0), value)
+
+class StructException(Exception):
+	pass
+
+class Struct(object):
+	__slots__ = ('__attrs__', '__baked__', '__defs__', '__endian__', '__next__', '__sizes__', '__values__')
+	int8 = StructType(('b', 1))
+	uint8 = StructType(('B', 1))
+	
+	int16 = StructType(('h', 2))
+	uint16 = StructType(('H', 2))
+	
+	int32 = StructType(('l', 4))
+	uint32 = StructType(('L', 4))
+	
+	int64 = StructType(('q', 8))
+	uint64 = StructType(('Q', 8))
+	
+	float = StructType(('f', 4))
+
+	@classmethod
+	def string(cls, len, offset=0, encoding=None, stripNulls=False, value=''):
+		return StructType(('string', (len, offset, encoding, stripNulls, value)))
+	
+	LE = '<'
+	BE = '>'
+	__endian__ = '<'
+	
+	def __init__(self, func=None, unpack=None, **kwargs):
+		self.__defs__ = []
+		self.__sizes__ = []
+		self.__attrs__ = []
+		self.__values__ = {}
+		self.__next__ = True
+		self.__baked__ = False
+		
+		if func == None:
+			self.__format__()
+		else:
+			sys.settrace(self.__trace__)
+			func()
+			for name in func.func_code.co_varnames:
+				value = self.__frame__.f_locals[name]
+				self.__setattr__(name, value)
+		
+		self.__baked__ = True
+		
+		if unpack != None:
+			if isinstance(unpack, tuple):
+				self.unpack(*unpack)
+			else:
+				self.unpack(unpack)
+		
+		if len(kwargs):
+			for name in kwargs:
+				self.__values__[name] = kwargs[name]
+	
+	def __trace__(self, frame, event, arg):
+		self.__frame__ = frame
+		sys.settrace(None)
+	
+	def __setattr__(self, name, value):
+		if name in self.__slots__:
+			return object.__setattr__(self, name, value)
+		
+		if self.__baked__ == False:
+			if not isinstance(value, list):
+				value = [value]
+				attrname = name
+			else:
+				attrname = '*' + name
+			
+			self.__values__[name] = None
+			
+			for sub in value:
+				if isinstance(sub, Struct):
+					sub = sub.__class__
+				try:
+					if issubclass(sub, Struct):
+						sub = ('struct', sub)
+				except TypeError:
+					pass
+				type_, size = tuple(sub)
+				if type_ == 'string':
+					self.__defs__.append(Struct.string)
+					self.__sizes__.append(size)
+					self.__attrs__.append(attrname)
+					self.__next__ = True
+					
+					if attrname[0] != '*':
+						self.__values__[name] = size[3]
+					elif self.__values__[name] == None:
+						self.__values__[name] = [size[3] for val in value]
+				elif type_ == 'struct':
+					self.__defs__.append(Struct)
+					self.__sizes__.append(size)
+					self.__attrs__.append(attrname)
+					self.__next__ = True
+					
+					if attrname[0] != '*':
+						self.__values__[name] = size()
+					elif self.__values__[name] == None:
+						self.__values__[name] = [size() for val in value]
+				else:
+					if self.__next__:
+						self.__defs__.append('')
+						self.__sizes__.append(0)
+						self.__attrs__.append([])
+						self.__next__ = False
+					
+					self.__defs__[-1] += type_
+					self.__sizes__[-1] += size
+					self.__attrs__[-1].append(attrname)
+					
+					if attrname[0] != '*':
+						self.__values__[name] = 0
+					elif self.__values__[name] == None:
+						self.__values__[name] = [0 for val in value]
+		else:
+			try:
+				self.__values__[name] = value
+			except KeyError:
+				raise AttributeError(name)
+	
+	def __getattr__(self, name):
+		if self.__baked__ == False:
+			return name
+		else:
+			try:
+				return self.__values__[name]
+			except KeyError:
+				raise AttributeError(name)
+	
+	def __len__(self):
+		ret = 0
+		arraypos, arrayname = None, None
+		
+		for i in range(len(self.__defs__)):
+			sdef, size, attrs = self.__defs__[i], self.__sizes__[i], self.__attrs__[i]
+			
+			if sdef == Struct.string:
+				size, offset, encoding, stripNulls, value = size
+				if isinstance(size, str):
+					size = self.__values__[size] + offset
+			elif sdef == Struct:
+				if attrs[0] == '*':
+					if arrayname != attrs:
+						arrayname = attrs
+						arraypos = 0
+					size = len(self.__values__[attrs[1:]][arraypos])
+				size = len(self.__values__[attrs])
+			
+			ret += size
+		
+		return ret
+	
+	def unpack(self, data, pos=0):
+		for name in self.__values__:
+			if not isinstance(self.__values__[name], Struct):
+				self.__values__[name] = None
+			elif self.__values__[name].__class__ == list and len(self.__values__[name]) != 0:
+				if not isinstance(self.__values__[name][0], Struct):
+					self.__values__[name] = None
+		
+		arraypos, arrayname = None, None
+		
+		for i in range(len(self.__defs__)):
+			sdef, size, attrs = self.__defs__[i], self.__sizes__[i], self.__attrs__[i]
+			
+			if sdef == Struct.string:
+				size, offset, encoding, stripNulls, value = size
+				if isinstance(size, str):
+					size = self.__values__[size] + offset
+				
+				temp = data[pos:pos+size]
+				if len(temp) != size:
+					raise StructException('Expected %i byte string, got %i' % (size, len(temp)))
+				
+				if encoding != None:
+					temp = temp.decode(encoding)
+				
+				if stripNulls:
+					temp = temp.rstrip('\0')
+				
+				if attrs[0] == '*':
+					name = attrs[1:]
+					if self.__values__[name] == None:
+						self.__values__[name] = []
+					self.__values__[name].append(temp)
+				else:
+					self.__values__[attrs] = temp
+				pos += size
+			elif sdef == Struct:
+				if attrs[0] == '*':
+					if arrayname != attrs:
+						arrayname = attrs
+						arraypos = 0
+					name = attrs[1:]
+					self.__values__[attrs][arraypos].unpack(data, pos)
+					pos += len(self.__values__[attrs][arraypos])
+					arraypos += 1
+				else:
+					self.__values__[attrs].unpack(data, pos)
+					pos += len(self.__values__[attrs])
+			else:
+				values = struct.unpack(self.__endian__+sdef, data[pos:pos+size])
+				pos += size
+				j = 0
+				for name in attrs:
+					if name[0] == '*':
+						name = name[1:]
+						if self.__values__[name] == None:
+							self.__values__[name] = []
+						self.__values__[name].append(values[j])
+					else:
+						self.__values__[name] = values[j]
+					j += 1
+		
+		return self
+	
+	def pack(self):
+		arraypos, arrayname = None, None
+		
+		ret = ''
+		for i in range(len(self.__defs__)):
+			sdef, size, attrs = self.__defs__[i], self.__sizes__[i], self.__attrs__[i]
+			
+			if sdef == Struct.string:
+				size, offset, encoding, stripNulls, value = size
+				if isinstance(size, str):
+					size = self.__values__[size]+offset
+				
+				if attrs[0] == '*':
+					if arrayname != attrs:
+						arraypos = 0
+						arrayname = attrs
+					temp = self.__values__[attrs[1:]][arraypos]
+					arraypos += 1
+				else:
+					temp = self.__values__[attrs]
+				
+				if encoding != None:
+					temp = temp.encode(encoding)
+				
+				temp = temp[:size]
+				ret += temp + ('\0' * (size - len(temp)))
+			elif sdef == Struct:
+				if attrs[0] == '*':
+					if arrayname != attrs:
+						arraypos = 0
+						arrayname = attrs
+					ret += self.__values__[attrs[1:]][arraypos].pack()
+					arraypos += 1
+				else:
+					ret += self.__values__[attrs].pack()
+			else:
+				values = []
+				for name in attrs:
+					if name[0] == '*':
+						if arrayname != name:
+							arraypos = 0
+							arrayname = name
+						values.append(self.__values__[name[1:]][arraypos])
+						arraypos += 1
+					else:
+						values.append(self.__values__[name])
+				
+				ret += struct.pack(self.__endian__+sdef, *values)
+		return ret
+	
+	def __getitem__(self, value):
+		return [('struct', self.__class__)] * value