1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
# -*- coding: utf-8 -*-
#
# AWL simulator - labels
#
# Copyright 2012-2018 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.sources import AwlSource
from awlsim.common.exceptions import *
from awlsim.common.util import *
from awlsim.core.operatortypes import * #+cimport
from awlsim.core.operators import * #+cimport
class AwlLabel(object): #+cdef
"""AWL label."""
__slots__ = (
"insn",
"label",
)
def __init__(self, insn, label):
self.insn = insn
self.label = label
def getLabelName(self):
return self.label
def getInsn(self):
return self.insn
@classmethod
def resolveLabels(cls, insns):
# Build the label table
labels = []
for i, insn in enumerate(insns):
if not insn.hasLabel():
continue
insnLabel = insn.getLabel()
for label in labels:
if label.getLabelName() == insnLabel:
raise AwlSimError("Duplicate label '%s' found. "
"Label names have to be unique in a code block." %\
insnLabel,
insn = insn)
labels.append(cls(insn, insnLabel))
# Resolve label references
for insn in insns:
for op in insn.ops:
if op.operType != AwlOperatorTypes.LBL_REF:
continue
labelIndex = cls.findInList(labels, op.immediateStr)
if labelIndex is None:
raise AwlSimError("Referenced label not found",
insn = insn)
op.setLabelIndex(labelIndex)
return labels
@classmethod
def findInList(cls, labelList, label):
for i, lbl in enumerate(labelList):
if lbl.getLabelName() == label:
return i
return None
@classmethod
def generateLabelName(cls, index):
"""Generate a label name string.
The name does not include the final ':' character.
"""
maxIndex = (26 ** 4) - 1
if index < 0 or index > maxIndex:
raise ValueError("Label index %d out of range 0 - %d." % (
index, maxIndex))
labelChars = [None] * 4
for i in range(3, -1, -1):
labelChars[i] = chr(ord("A") + (index % 26))
index //= 26
return "".join(labelChars)
|
