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# -*- 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.cython_support cimport * #@cy
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="STRING"),
),
BlockInterfaceField.FTYPE_OUT : (
BlockInterfaceField(name="RET_VAL", dataType="INT"),
),
BlockInterfaceField.FTYPE_TEMP : (
BlockInterfaceField(name="AR1_SAVE", dataType="DWORD"),
BlockInterfaceField(name="DBNR", dataType="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)
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