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# -*- coding: utf-8 -*-
#
# AWL data offset
#
# Copyright 2012-2017 Michael Buesch <m@bues.ch>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
from __future__ import division, absolute_import, print_function, unicode_literals
#from awlsim.common.cython_support cimport * #@cy
from awlsim.common.compat import *
from awlsim.common.datatypehelpers import * #+cimport
from awlsim.common.exceptions import *
from awlsim.core.util import *
__all__ = [ "AwlOffset",
"make_AwlOffset",
"make_AwlOffset_fromPointerValue",
"make_AwlOffset_fromLongBitOffset",
]
class AwlOffset(object): #+cdef
"""Memory area offset
"""
# A DB-number for fully qualified access, or None.
dbNumber = -1 #@nocy
# A symbolic DB-name for fully qualified access, or None.
dbName = None #@nocy
# An AwlDataIdentChain, or None.
# Used for fully qualified (DBx.VAR) or named local (#VAR)
# global symbolic ("VAR") accesses.
# For global symbols the chain only has one element.
identChain = None #@nocy
# A (S)FB-number for multi-instance calls, or None.
fbNumber = None #@nocy
# Additional sub-offset that is added to this offset, or None.
# This is used for arrays and structs.
subOffset = None #@nocy
def __eq__(self, other): #@nocy
#@cy cpdef __eq(self, object other):
"""Equality operator.
This does only compare byte and bit offset and
does _not_ check dynAttrs.
"""
return (self is other) or (\
isinstance(other, AwlOffset) and\
self.byteOffset == other.byteOffset and\
self.bitOffset == other.bitOffset\
)
#@cy def __richcmp__(self, object other, int op):
#@cy if op == 2: # __eq__
#@cy return self.__eq(other)
#@cy elif op == 3: # __ne__
#@cy return not self.__eq(other)
#@cy return False
def __ne__(self, other): #@nocy
return not self.__eq__(other) #@nocy
def dup(self): #@nocy
#@cy cpdef AwlOffset dup(self):
#@cy cdef AwlOffset offset
offset = make_AwlOffset(self.byteOffset,
self.bitOffset)
offset.dbNumber = self.dbNumber
return offset
def toPointerValue(self): #@nocy
#@cy cpdef uint32_t toPointerValue(self):
return ((self.byteOffset << 3) & 0x0007FFF8) |\
(self.bitOffset & 0x7)
def toLongBitOffset(self): #@nocy
#@cy cpdef uint64_t toLongBitOffset(self):
#@cy return <int64_t>self.byteOffset * <int64_t>8 + <int64_t>self.bitOffset
return self.byteOffset * 8 + self.bitOffset #@nocy
def __add__(self, other): #@nocy
#@cy def __add__(self, AwlOffset other):
#@cy cdef int64_t bitOffset
#@cy bitOffset = ((<int64_t>self.byteOffset + <int64_t>other.byteOffset) * <int64_t>8 +
#@cy <int64_t>self.bitOffset + <int64_t>other.bitOffset)
bitOffset = ((self.byteOffset + other.byteOffset) * 8 + #@nocy
self.bitOffset + other.bitOffset) #@nocy
return make_AwlOffset(bitOffset // 8, bitOffset % 8)
def __iadd__(self, other): #@nocy
#@cy def __iadd__(self, AwlOffset other):
#@cy cdef int64_t bitOffset
#@cy bitOffset = ((<int64_t>self.byteOffset + <int64_t>other.byteOffset) * <int64_t>8 +
#@cy <int64_t>self.bitOffset + <int64_t>other.bitOffset)
bitOffset = ((self.byteOffset + other.byteOffset) * 8 + #@nocy
self.bitOffset + other.bitOffset) #@nocy
self.byteOffset = bitOffset // 8
self.bitOffset = bitOffset % 8
return self
# Round the offset to a multiple of 'byteBase' bytes.
# Returns an AwlOffset.
def roundUp(self, byteBase):
#@cy cdef int64_t byteOffset
byteOffset = self.byteOffset
if self.bitOffset:
byteOffset += 1
byteOffset = roundUp(byteOffset, byteBase)
return make_AwlOffset(byteOffset, 0)
def __repr__(self):
prefix = ""
if self.dbNumber >= 0:
prefix = "DB%d" % self.dbNumber
if self.dbName is not None:
prefix = '"%s"' % self.dbName
if self.identChain is not None:
if prefix:
return prefix + "." + self.identChain.getString()
return "#" + self.identChain.getString()
else:
if prefix:
prefix = prefix + ".DBX "
return "%s%d.%d" % (prefix,
self.byteOffset,
self.bitOffset)
#
# make_AwlOffset() - Construct an AwlOffset instance.
# For Cython performance reasons we don't use __init__ with arguments.
#
def make_AwlOffset(byteOffset, bitOffset, AwlOffset=AwlOffset): #@nocy
#cdef AwlOffset make_AwlOffset(int64_t byteOffset, int32_t bitOffset): #@cy
#@cy cdef AwlOffset offset
offset = AwlOffset()
#@cy offset.dbNumber = -1
#@cy offset.dbName = None
#@cy offset.identChain = None
#@cy offset.fbNumber = None
#@cy offset.subOffset = None
offset.byteOffset, offset.bitOffset = byteOffset, bitOffset
return offset
#
# make_AwlOffset_fromPointerValue() - Construct an AwlOffset from a S7 pointer value.
#
def make_AwlOffset_fromPointerValue(value, make_AwlOffset=make_AwlOffset): #@nocy
#cdef AwlOffset make_AwlOffset_fromPointerValue(uint32_t value): #@cy
return make_AwlOffset((value & 0x0007FFF8) >> 3,
(value & 0x7))
#
# make_AwlOffset_fromLongBitOffset() - Construct an AwlOffset from a bit offset.
#
def make_AwlOffset_fromLongBitOffset(bitOffset, make_AwlOffset=make_AwlOffset): #@nocy
#cdef AwlOffset make_AwlOffset_fromLongBitOffset(int64_t bitOffset): #@cy
return make_AwlOffset(bitOffset // 8, bitOffset % 8)
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