def __convert(self, kind, endian, data):
# Can raise StandardError and IOError
value = 0
# Convert the data from the file
if kind == 'byte':
if len(data) < 1:
raise StandardError, "Should never happen, not enough data"
value = ord(data[0])
elif kind == 'short':
if len(data) < 2:
raise StandardError, "Should never happen, not enough data"
if endian == 'local':
value = convert.local2(data)
elif endian == 'little':
value = convert.little2(data)
elif endian == 'big':
value = convert.big2(data)
else:
raise StandardError, "Endian type unknown"
elif kind == 'long':
if len(data) < 4:
raise StandardError, "Should never happen, not enough data"
if endian == 'local':
value = convert.local4(data)
elif endian == 'little':
value = convert.little4(data)
elif endian == 'big':
value = convert.big4(data)
else:
raise StandardError, "Endian type unknown"
elif kind == 'date':
# XXX: Not done yet
pass
elif kind == 'ldate':
# XXX: Not done yet
pass
elif kind == 'string':
# Nothing to do
pass
elif kind == 'pstring':
# Not done here anymore
pass
# #Convert it to be like a string
# size=ord(data[0])
# # Not sure the test is right (at one byte)
# if file_length < offset + size:
# value= self.__read(f,size)
# leng = size
# kind = "string"
else:
raise StandardError, "Type " + str(kind) + " not recognised"
return value
def __convert (self,kind,endian,data): # Can raise StandardError and IOError value = 0 # Convert the data from the file if kind == 'byte': if len(data) < 1: raise StandardError, "Should never happen, not enough data" value= ord(data[0]) elif kind == 'short': if len(data) < 2: raise StandardError, "Should never happen, not enough data" if endian == 'local': value= convert.local2(data) elif endian == 'little': value= convert.little2(data) elif endian == 'big': value= convert.big2(data) else: raise StandardError, "Endian type unknown" elif kind == 'long': if len(data) < 4: raise StandardError, "Should never happen, not enough data" if endian == 'local': value= convert.local4(data) elif endian == 'little': value= convert.little4(data) elif endian == 'big': value= convert.big4(data) else: raise StandardError, "Endian type unknown" elif kind == 'date': # XXX: Not done yet pass elif kind == 'ldate': # XXX: Not done yet pass elif kind == 'string': # Nothing to do pass elif kind == 'pstring': # Not done here anymore pass # #Convert it to be like a string # size=ord(data[0]) # # Not sure the test is right (at one byte) # if file_length < offset + size: # value= self.__read(f,size) # leng = size # kind = "string" else: raise StandardError, "Type " + str(kind) + " not recognised" return value
def __indirect_offset(self, file, type, offset):
# Raise file error if file too short
f.seek(offset)
if type == 'l':
delta = convert.little4(self.__read(f, 4))
elif type == 'L':
delta = convert.big4(self.__read(f, 4))
elif type == 's':
delta = convert.little2(self.__read(f, 2))
elif type == 'S':
delta = convert.big2(self.__read(f, 2))
elif type == 'b':
delta = ord(self.__read(f, 1))
elif type == 'B':
delta = ord(self.__read(f, 1))
return offset + delta
def __indirect_offset (self,file,type,offset): # Raise file error if file too short f.seek(offset) if type == 'l': delta = convert.little4(self.__read(f,4)) elif type == 'L': delta = convert.big4(self.__read(f,4)) elif type == 's': delta = convert.little2(self.__read(f,2)) elif type == 'S': delta = convert.big2(self.__read(f,2)) elif type == 'b': delta = ord(self.__read(f,1)) elif type == 'B': delta = ord(self.__read(f,1)) return offset + delta