def _encode_data(entry, value, length):
if entry.format in (Field.BINARY, Field.HEX):
assert isinstance(value, Data)
result = value.copy()
elif entry.format == Field.TEXT:
assert isinstance(value, basestring)
try:
result = Data(value.encode(entry.encoding))
except UnicodeDecodeError:
raise BadEncodingError(entry, value)
elif entry.format == Field.INTEGER:
assert isinstance(value, (int, long))
if length is None:
raise FieldDataError(entry, "Unable to encode integer field " "without explicit length")
assert entry.encoding in [Field.BIG_ENDIAN, Field.LITTLE_ENDIAN]
if entry.encoding == Field.BIG_ENDIAN:
result = Data.from_int_big_endian(value, length)
else:
result = Data.from_int_little_endian(value, length)
elif entry.format == Field.FLOAT:
assert entry.encoding in [Field.BIG_ENDIAN, Field.LITTLE_ENDIAN]
assert isinstance(value, float)
if entry.encoding == Field.BIG_ENDIAN:
result = Data.from_float_big_endian(value, length)
else:
result = Data.from_float_little_endian(value, length)
else:
raise Exception("Unknown field format of '%s'!" % entry.format)
return result
