diff options
Diffstat (limited to 'tests/bytecode/pylib-tests/xdrlib.py')
-rw-r--r-- | tests/bytecode/pylib-tests/xdrlib.py | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/tests/bytecode/pylib-tests/xdrlib.py b/tests/bytecode/pylib-tests/xdrlib.py deleted file mode 100644 index c05cf87e4a..0000000000 --- a/tests/bytecode/pylib-tests/xdrlib.py +++ /dev/null @@ -1,224 +0,0 @@ -"""Implements (a subset of) Sun XDR -- eXternal Data Representation. - -See: RFC 1014 - -""" - -import struct -from io import BytesIO - -__all__ = ["Error", "Packer", "Unpacker", "ConversionError"] - -# exceptions -class Error(Exception): - """Exception class for this module. Use: - - except xdrlib.Error as var: - # var has the Error instance for the exception - - Public ivars: - msg -- contains the message - - """ - def __init__(self, msg): - self.msg = msg - def __repr__(self): - return repr(self.msg) - def __str__(self): - return str(self.msg) - - -class ConversionError(Error): - pass - - - -class Packer: - """Pack various data representations into a buffer.""" - - def __init__(self): - self.reset() - - def reset(self): - self.__buf = BytesIO() - - def get_buffer(self): - return self.__buf.getvalue() - # backwards compatibility - get_buf = get_buffer - - def pack_uint(self, x): - self.__buf.write(struct.pack('>L', x)) - - def pack_int(self, x): - self.__buf.write(struct.pack('>l', x)) - - pack_enum = pack_int - - def pack_bool(self, x): - if x: self.__buf.write(b'\0\0\0\1') - else: self.__buf.write(b'\0\0\0\0') - - def pack_uhyper(self, x): - self.pack_uint(x>>32 & 0xffffffff) - self.pack_uint(x & 0xffffffff) - - pack_hyper = pack_uhyper - - def pack_float(self, x): - try: self.__buf.write(struct.pack('>f', x)) - except struct.error as msg: - raise ConversionError(msg) - - def pack_double(self, x): - try: self.__buf.write(struct.pack('>d', x)) - except struct.error as msg: - raise ConversionError(msg) - - def pack_fstring(self, n, s): - if n < 0: - raise ValueError('fstring size must be nonnegative') - data = s[:n] - n = ((n+3)//4)*4 - data = data + (n - len(data)) * b'\0' - self.__buf.write(data) - - pack_fopaque = pack_fstring - - def pack_string(self, s): - n = len(s) - self.pack_uint(n) - self.pack_fstring(n, s) - - pack_opaque = pack_string - pack_bytes = pack_string - - def pack_list(self, list, pack_item): - for item in list: - self.pack_uint(1) - pack_item(item) - self.pack_uint(0) - - def pack_farray(self, n, list, pack_item): - if len(list) != n: - raise ValueError('wrong array size') - for item in list: - pack_item(item) - - def pack_array(self, list, pack_item): - n = len(list) - self.pack_uint(n) - self.pack_farray(n, list, pack_item) - - - -class Unpacker: - """Unpacks various data representations from the given buffer.""" - - def __init__(self, data): - self.reset(data) - - def reset(self, data): - self.__buf = data - self.__pos = 0 - - def get_position(self): - return self.__pos - - def set_position(self, position): - self.__pos = position - - def get_buffer(self): - return self.__buf - - def done(self): - if self.__pos < len(self.__buf): - raise Error('unextracted data remains') - - def unpack_uint(self): - i = self.__pos - self.__pos = j = i+4 - data = self.__buf[i:j] - if len(data) < 4: - raise EOFError - return struct.unpack('>L', data)[0] - - def unpack_int(self): - i = self.__pos - self.__pos = j = i+4 - data = self.__buf[i:j] - if len(data) < 4: - raise EOFError - return struct.unpack('>l', data)[0] - - unpack_enum = unpack_int - - def unpack_bool(self): - return bool(self.unpack_int()) - - def unpack_uhyper(self): - hi = self.unpack_uint() - lo = self.unpack_uint() - return int(hi)<<32 | lo - - def unpack_hyper(self): - x = self.unpack_uhyper() - if x >= 0x8000000000000000: - x = x - 0x10000000000000000 - return x - - def unpack_float(self): - i = self.__pos - self.__pos = j = i+4 - data = self.__buf[i:j] - if len(data) < 4: - raise EOFError - return struct.unpack('>f', data)[0] - - def unpack_double(self): - i = self.__pos - self.__pos = j = i+8 - data = self.__buf[i:j] - if len(data) < 8: - raise EOFError - return struct.unpack('>d', data)[0] - - def unpack_fstring(self, n): - if n < 0: - raise ValueError('fstring size must be nonnegative') - i = self.__pos - j = i + (n+3)//4*4 - if j > len(self.__buf): - raise EOFError - self.__pos = j - return self.__buf[i:i+n] - - unpack_fopaque = unpack_fstring - - def unpack_string(self): - n = self.unpack_uint() - return self.unpack_fstring(n) - - unpack_opaque = unpack_string - unpack_bytes = unpack_string - - def unpack_list(self, unpack_item): - list = [] - while 1: - x = self.unpack_uint() - if x == 0: break - if x != 1: - raise ConversionError('0 or 1 expected, got %r' % (x,)) - item = unpack_item() - list.append(item) - return list - - def unpack_farray(self, n, unpack_item): - list = [] - for i in range(n): - list.append(unpack_item()) - return list - - def unpack_array(self, unpack_item): - n = self.unpack_uint() - return self.unpack_farray(n, unpack_item) |