import struct
class BinaryReaderEOFException(Exception):
def __init__(self):
pass
def __str__(self):
return 'Not enough bytes in file to satisfy read request'
class BinaryReader:
# Map well-known type names into struct format characters.
typeNames = {
'int8' :'b',
'uint8' :'B',
'int16' :'h',
'uint16' :'H',
'int32' :'i',
'uint32' :'I',
'int64' :'q',
'uint64' :'Q',
'float' :'f',
'double' :'d',
'char' :'s'}
def __init__(self, fileName):
self.file = open(fileName, 'rb')
def read(self, typeName):
typeFormat = BinaryReader.typeNames[typeName.lower()]
typeSize = struct.calcsize(typeFormat)
value = self.file.read(typeSize)
if typeSize != len(value):
raise BinaryReaderEOFException
return struct.unpack(typeFormat, value)[0]
def __del__(self):
self.file.close()
Diff to Previous Revision
--- revision 1 2011-03-14 23:59:46
+++ revision 2 2011-03-15 00:11:10
@@ -1,10 +1,10 @@
+import struct
+
class BinaryReaderEOFException(Exception):
def __init__(self):
pass
-
def __str__(self):
return 'Not enough bytes in file to satisfy read request'
-
class BinaryReader:
# Map well-known type names into struct format characters.
