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
|
# -*- coding: utf-8 -*-
#
# AWL simulator - IEC library - FC 21 "LEN"
#
# Copyright 2015 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.compat import *
from awlsim.library.libentry import *
class Lib__IEC__FC21_LEN(AwlLibFC):
libraryName = "IEC"
staticIndex = 21
symbolName = "LEN"
description = "Get STRING length"
interfaceFields = {
BlockInterfaceField.FTYPE_IN : (
BlockInterfaceField(name = "S",
dataType = AwlDataType.makeByName("STRING")),
),
BlockInterfaceField.FTYPE_OUT : (
BlockInterfaceField(name = "RET_VAL",
dataType = AwlDataType.makeByName("INT")),
),
BlockInterfaceField.FTYPE_TEMP : (
BlockInterfaceField(name = "AR1_SAVE",
dataType = AwlDataType.makeByName("DWORD")),
BlockInterfaceField(name = "DBNR",
dataType = AwlDataType.makeByName("WORD")),
),
}
awlCodeCopyright = "Copyright (c) 2015 Michael Buesch <m@bues.ch>"
awlCodeLicense = "BSD-2-clause"
awlCodeIsStandard = True
awlCodeVersion = "0.1"
awlCode = """
TAR1 #AR1_SAVE // Save AR1 register
L P##S // Load pointer to DB-pointer
LAR1
L W [AR1, P#0.0] // Load DB number from DB-pointer
T #DBNR
AUF DB [#DBNR] // Open Data Block (if any)
L D [AR1, P#2.0] // Load data pointer from DB-pointer
LAR1
L B [AR1, P#1.0] // Load actual #S string length (byte 1)
T #RET_VAL // Output actual string length
LAR1 #AR1_SAVE // Restore AR1 register
SET // VKE := 1
SAVE // BIE := 1
BE
"""
AwlLib.registerEntry(Lib__IEC__FC21_LEN)
|
