diff options
Diffstat (limited to 'Lib')
| -rw-r--r-- | Lib/pickle.py | 13 | ||||
| -rw-r--r-- | Lib/pickletools.py | 64 |
2 files changed, 19 insertions, 58 deletions
diff --git a/Lib/pickle.py b/Lib/pickle.py index 9352283..27d28eb 100644 --- a/Lib/pickle.py +++ b/Lib/pickle.py @@ -135,19 +135,18 @@ FALSE = 'I00\n' # not an opcode; see INT docs in pickletools.py # Protocol 2 (not yet implemented) (XXX comments will be added later) -NEWOBJ = '\x81' PROTO = '\x80' -EXT2 = '\x83' +NEWOBJ = '\x81' EXT1 = '\x82' -TUPLE1 = '\x85' +EXT2 = '\x83' EXT4 = '\x84' -TUPLE3 = '\x87' +TUPLE1 = '\x85' TUPLE2 = '\x86' -NEWFALSE = '\x89' +TUPLE3 = '\x87' NEWTRUE = '\x88' -LONG2 = '\x8b' +NEWFALSE = '\x89' LONG1 = '\x8a' -LONG4 = '\x8c' +LONG4 = '\x8b' __all__.extend([x for x in dir() if re.match("[A-Z][A-Z0-9_]+$",x)]) diff --git a/Lib/pickletools.py b/Lib/pickletools.py index 90df209..2f52f3b 100644 --- a/Lib/pickletools.py +++ b/Lib/pickletools.py @@ -125,7 +125,8 @@ UP_TO_NEWLINE = -1 # Represents the number of bytes consumed by a two-argument opcode where # the first argument gives the number of bytes in the second argument. -TAKEN_FROM_ARGUMENT = -2 +TAKEN_FROM_ARGUMENT1 = -2 # num bytes is 1-byte unsigned int +TAKEN_FROM_ARGUMENT4 = -3 # num bytes is 4-byte signed little-endian int class ArgumentDescriptor(object): __slots__ = ( @@ -133,7 +134,8 @@ class ArgumentDescriptor(object): 'name', # length of argument, in bytes; an int; UP_TO_NEWLINE and - # TAKEN_FROM_ARGUMENT are negative values for variable-length cases + # TAKEN_FROM_ARGUMENT{1,4} are negative values for variable-length + # cases 'n', # a function taking a file-like object, reading this kind of argument @@ -150,8 +152,9 @@ class ArgumentDescriptor(object): self.name = name assert isinstance(n, int) and (n >= 0 or - n is UP_TO_NEWLINE or - n is TAKEN_FROM_ARGUMENT) + n in (UP_TO_NEWLINE, + TAKEN_FROM_ARGUMENT1, + TAKEN_FROM_ARGUMENT4)) self.n = n self.reader = reader @@ -341,7 +344,7 @@ def read_string4(f): string4 = ArgumentDescriptor( name="string4", - n=TAKEN_FROM_ARGUMENT, + n=TAKEN_FROM_ARGUMENT4, reader=read_string4, doc="""A counted string. @@ -370,7 +373,7 @@ def read_string1(f): string1 = ArgumentDescriptor( name="string1", - n=TAKEN_FROM_ARGUMENT, + n=TAKEN_FROM_ARGUMENT1, reader=read_string1, doc="""A counted string. @@ -434,7 +437,7 @@ def read_unicodestring4(f): unicodestring4 = ArgumentDescriptor( name="unicodestring4", - n=TAKEN_FROM_ARGUMENT, + n=TAKEN_FROM_ARGUMENT4, reader=read_unicodestring4, doc="""A counted Unicode string. @@ -626,7 +629,7 @@ def read_long1(f): long1 = ArgumentDescriptor( name="long1", - n=TAKEN_FROM_ARGUMENT, + n=TAKEN_FROM_ARGUMENT1, reader=read_long1, doc="""A binary long, little-endian, using 1-byte size. @@ -634,36 +637,6 @@ long1 = ArgumentDescriptor( many bytes and interprets them as a little-endian 2's-complement long. """) -def read_long2(f): - r""" - >>> import StringIO - >>> read_long2(StringIO.StringIO("\x02\x00\xff\x00")) - 255L - >>> read_long2(StringIO.StringIO("\x02\x00\xff\x7f")) - 32767L - >>> read_long2(StringIO.StringIO("\x02\x00\x00\xff")) - -256L - >>> read_long2(StringIO.StringIO("\x02\x00\x00\x80")) - -32768L - >>> - """ - - n = read_uint2(f) - data = f.read(n) - if len(data) != n: - raise ValueError("not enough data in stream to read long2") - return decode_long(data) - -long2 = ArgumentDescriptor( - name="long2", - n=TAKEN_FROM_ARGUMENT, - reader=read_long2, - doc="""A binary long, little-endian, using 2-byte size. - - This first reads two byte as an unsigned size, then reads that - many bytes and interprets them as a little-endian 2's-complement long. - """) - def read_long4(f): r""" >>> import StringIO @@ -688,7 +661,7 @@ def read_long4(f): long4 = ArgumentDescriptor( name="long4", - n=TAKEN_FROM_ARGUMENT, + n=TAKEN_FROM_ARGUMENT4, reader=read_long4, doc="""A binary representation of a long, little-endian. @@ -1705,19 +1678,8 @@ opcodes = [ A more efficient encoding of a Python long; the long1 encoding says it all."""), - I(name="LONG2", - code='\x8b', - arg=long2, - stack_before=[], - stack_after=[pylong], - proto=2, - doc="""Long integer using two-byte length. - - A more efficient encoding of a Python long; the long2 encoding - says it all."""), - I(name="LONG4", - code='\x8c', + code='\x8b', arg=long4, stack_before=[], stack_after=[pylong], |