unix-cpy: Remove unix-cpy. It's no longer needed.

unix-cpy was originally written to get semantic equivalent with CPython
without writing functional tests.  When writing the initial
implementation of uPy it was a long way between lexer and functional
tests, so the half-way test was to make sure that the bytecode was
correct.  The idea was that if the uPy bytecode matched CPython 1-1 then
uPy would be proper Python if the bytecodes acted correctly.  And having
matching bytecode meant that it was less likely to miss some deep
subtlety in the Python semantics that would require an architectural
change later on.

But that is all history and it no longer makes sense to retain the
ability to output CPython bytecode, because:

1. It outputs CPython 3.3 compatible bytecode.  CPython's bytecode
changes from version to version, and seems to have changed quite a bit
in 3.5.  There's no point in changing the bytecode output to match
CPython anymore.

2. uPy and CPy do different optimisations to the bytecode which makes it
harder to match.

3. The bytecode tests are not run.  They were never part of Travis and
are not run locally anymore.

4. The EMIT_CPYTHON option needs a lot of extra source code which adds
heaps of noise, especially in compile.c.

5. Now that there is an extensive test suite (which tests functionality)
there is no need to match the bytecode.  Some very subtle behaviour is
tested with the test suite and passing these tests is a much better
way to stay Python-language compliant, rather than trying to match
CPy bytecode.

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)