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171 lines
6.4 KiB
171 lines
6.4 KiB
/***************************************************************************
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* Copyright (C) 2003 by David Saxton *
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* david@bluehaze.org *
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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 2 of the License, or *
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* (at your option) any later version. *
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***************************************************************************/
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#include "varcomparison.h"
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#include "libraryitem.h"
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#include "flowcode.h"
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#include <tdelocale.h>
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Item* VarComparison::construct( ItemDocument *itemDocument, bool newItem, const char *id )
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{
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return new VarComparison( (ICNDocument*)itemDocument, newItem, id );
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}
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LibraryItem* VarComparison::libraryItem()
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{
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return new LibraryItem(
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TQString("flow/varcomparison"),
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i18n("Comparison"),
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i18n("Variables"),
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"branch.png",
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LibraryItem::lit_flowpart,
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VarComparison::construct );
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}
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VarComparison::VarComparison( ICNDocument *icnDocument, bool newItem, const char *id )
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: FlowPart( icnDocument, newItem, (id) ? id : "varcomparison" )
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{
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m_name = i18n("Variable Comparison");
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m_desc = i18n("Conditional branch point, depending on the comparison of two values. The supported comparisons are:<ul><li><b>x == y</b> - Equality: true if x has the same value as y.</li><li><b>x < y</b> - Less than: true if x is smaller than y.</li><li><b>x > y</b> - Greater than: true if x is bigger than y.</li><li><b>x <= y</b> - Less than or equal: true if x is less than or equal to y.</li><li><b>x >= y</b> - Greater than or equal: true if x is greater than or equal to y.</li><li><b>x != y</b> - Does not equal: true if x does not have the same value as y.</li></ul>");
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initDecisionSymbol();
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createStdInput();
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createStdOutput();
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createAltOutput();
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createProperty( "0var1", Variant::Type::Combo );
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property("0var1")->setCaption( i18n("Variable") );
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property("0var1")->setValue("x");
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createProperty( "1op", Variant::Type::Select );
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property("1op")->setAllowed( TQStringList::split( ',', "==,<,>,<=,>=,!=" ) );
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property("1op")->setValue("==");
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property("1op")->setToolbarCaption(" ");
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property("1op")->setEditorCaption( i18n("Operation") );
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createProperty( "2var2", Variant::Type::Combo );
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property("2var2")->setToolbarCaption(" ");
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property("2var2")->setEditorCaption( i18n("Value") );
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property("2var2")->setValue("0");
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addDisplayText( "output_false", TQRect( offsetX()+width(), 2, 40, 20 ), "No" );
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addDisplayText( "output_true", TQRect( 0, offsetY()+height(), 50, 20 ), "Yes" );
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}
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VarComparison::~VarComparison()
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{
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}
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void VarComparison::dataChanged()
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{
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setCaption( dataString("0var1") + " " + dataString("1op") + " " + dataString("2var2") + " ?" );
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}
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TQString VarComparison::oppOp( const TQString &op )
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{
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if ( op == "==" ) return "!=";
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if ( op == "!=" ) return "==";
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else if ( op == "<" ) return ">=";
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else if ( op == ">=" ) return "<";
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else if ( op == ">" ) return "<=";
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else if ( op == "<=" ) return ">";
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else return "__UNKNOWN_OP__";
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}
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void VarComparison::generateMicrobe( FlowCode *code )
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{
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TQString var1 = dataString("0var1");
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TQString var2 = dataString("2var2");
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TQString test = dataString("1op");
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handleIfElse( code, var1+" "+test+" "+var2, var1+" "+oppOp(test)+" "+var2, "stdoutput", "altoutput" );
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#if 0
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code->addCode( "if "+var1+" "+test+" "+var2+"\n{\n" );
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code->addCodeBranch( outputPart("stdoutput") );
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code->addCode("}");
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if ( outputPart("altoutput") )
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{
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code->addCode("else\n{");
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code->addCodeBranch( outputPart("altoutput") );
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code->addCode("}");
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}
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#endif
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#if 0
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TQString newCode;
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if ( FlowCode::isLiteral(var2) ) newCode += "movlw " + var2 + " ; Move literal to register w\n";
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else
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{
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code->addVariable(var2);
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newCode += "movf " + var2 + ",0 ; Move " + var2 + " to register w\n";
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}
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if ( FlowCode::isLiteral(var1) ) newCode += "sublw " + var1 + " ; Subtract register w from " + var1 + ", placing result in w\n";
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else
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{
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code->addVariable(var1);
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newCode += "subwf " + var1 + ",0 ; Subtract register w from " + var1 + ", placing result in w\n";
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}
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if ( test == "==" )
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{
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// check: works
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newCode += "btfss STATUS,2 ; Check if zero flag is set\n";
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newCode += gotoCode("altoutput") + " ; Result from calculation was non-zero; hence comparison is false\n";
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newCode += gotoCode("stdoutput") + " ; Ouput was zero; hence comparison is true, so continue from this point\n";
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}
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else if ( test == "!=" )
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{
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// check: works
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newCode += "btfsc STATUS,2 ; Check if zero flag is clear\n";
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newCode += gotoCode("altoutput") + " ; Result from calculation was zero; hence comparison is false\n";
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newCode += gotoCode("stdoutput") + " ; Output was non-zero; hence comparison is true, so continue from this point\n";
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}
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else if ( test == ">=" )
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{
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// check: works
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newCode += "btfss STATUS,0 ; Check if carry flag is set\n";
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newCode += gotoCode("altoutput") + " ; Result from calculation is negative; hence comparison is false\n";
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newCode += gotoCode("stdoutput") + " ; Result from calculation is positive or zero; so continue from this point\n";
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}
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else if ( test == ">" )
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{
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// check: works
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newCode += "btfss STATUS,0 ; Check if carry flag is set\n";
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newCode += gotoCode("altoutput") + " ; Result is negative; hence comparison is false\n";
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newCode += "btfsc STATUS,2 ; Check if zero flag is set\n";
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newCode += gotoCode("altoutput") + " ; Result is zero; hence comparison is false\n";
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newCode += gotoCode("stdoutput") + " ; Comparison is true, so continue from this point\n";
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}
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else if ( test == "<" )
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{
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// check: works
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newCode += "btfsc STATUS,0 ; Check if carry flag is set\n";
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newCode += gotoCode("altoutput");
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newCode += gotoCode("stdoutput");
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}
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else if ( test == "<=" )
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{
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// check: works
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newCode += "btfsc STATUS,2 ; Check if result is zero\n";
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newCode += gotoCode("stdoutput") + " ; Result is zero; hence comparison is true\n";
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newCode += "btfsc STATUS,0 ; Check if carry flag is set\n";
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newCode += gotoCode("altoutput") + " ; Result is positive (not zero, has already tested for this); hence comparison is false\n";
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newCode += gotoCode("stdoutput") + " ; Result is negative, hence comparison is true\n";
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}
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code->addCodeBlock( id(), newCode );
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#endif
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}
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