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110 lines
3.9 KiB
Python
110 lines
3.9 KiB
Python
# Copyright (c) 2016-2018 by Rocky Bernstein
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# Copyright (c) 2000-2002 by hartmut Goebel <h.goebel@crazy-compilers.com>
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# Copyright (c) 1999 John Aycock
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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import re, sys
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from uncompyle6 import PYTHON3
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if PYTHON3:
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intern = sys.intern
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class Token():
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"""
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Class representing a byte-code instruction.
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A byte-code token is equivalent to Python 3's dis.instruction or
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the contents of one line as output by dis.dis().
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"""
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# FIXME: match Python 3.4's terms:
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# linestart = starts_line
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# attr = argval
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# pattr = argrepr
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def __init__(self, opname, attr=None, pattr=None, offset=-1,
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linestart=None, op=None, has_arg=None, opc=None):
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self.kind = intern(opname)
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self.op = op
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self.has_arg = has_arg
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self.attr = attr
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self.pattr = pattr
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self.offset = offset
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self.linestart = linestart
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if has_arg is False:
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self.attr = None
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self.pattr = None
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self.opc = opc
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def __eq__(self, o):
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""" '==' on kind and "pattr" attributes.
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It is okay if offsets and linestarts are different"""
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if isinstance(o, Token):
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return (self.kind == o.kind) and (self.pattr == o.pattr)
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else:
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# ?? do we need this?
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return self.kind == o
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def __ne__(self, o):
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""" '!=', but it's okay if offsets and linestarts are different"""
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return not self.__eq__(o)
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def __repr__(self):
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return str(self.kind)
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# def __str__(self):
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# pattr = self.pattr if self.pattr is not None else ''
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# prefix = '\n%3d ' % self.linestart if self.linestart else (' ' * 6)
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# return (prefix +
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# ('%9s %-18s %r' % (self.offset, self.kind, pattr)))
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def __str__(self):
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return self.format(line_prefix='')
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def format(self, line_prefix=''):
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prefix = ('\n%s%4d ' % (line_prefix, self.linestart)
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if self.linestart else (' ' * (6 + len(line_prefix))))
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offset_opname = '%6s %-17s' % (self.offset, self.kind)
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if not self.has_arg:
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return "%s%s" % (prefix, offset_opname)
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argstr = "%6d " % self.attr if isinstance(self.attr, int) else (' '*7)
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if self.pattr:
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pattr = self.pattr
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if self.opc:
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if self.op in self.opc.JREL_OPS:
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if not self.pattr.startswith('to '):
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pattr = "to " + self.pattr
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elif self.op in self.opc.JABS_OPS:
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self.pattr= str(self.pattr)
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if not self.pattr.startswith('to '):
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pattr = "to " + str(self.pattr)
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pass
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elif self.op in self.opc.hascompare:
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if isinstance(self.attr, int):
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pattr = self.opc.cmp_op[self.attr]
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# And so on. See xdis/bytecode.py get_instructions_bytes
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pass
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elif re.search('_\d+$', self.kind):
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return "%s%s%s" % (prefix, offset_opname, argstr)
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else:
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pattr = ''
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return "%s%s%s %r" % (prefix, offset_opname, argstr, pattr)
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def __hash__(self):
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return hash(self.kind)
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def __getitem__(self, i):
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raise IndexError
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NoneToken = Token('LOAD_CONST', offset=-1, attr=None, pattr=None)
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