#include <math.h>

 #include <qregexp.h>

 #include <qpoint.h>

 #include <stdlib.h>

 #include "misc.h"

 QString qpointToString (const QPoint &p)

 {

 	return "(" + QString("%1").arg(p.x()) +","+ QString ("%1").arg (p.y()) +")";

 }

 ostream &operator<< (ostream &stream, QPoint const &p)

 { 

 	stream << "("<<p.x()<<","<<p.y()<<")";

 	return stream;

 }

 float getAngle(const QPoint &p)

 {	

 	// Calculate angle of vector to y-axis

 	if (p.y()==0)

 	{

 		if (p.x()>=0)

 			return M_PI_2;

 		else

 			return 3* M_PI_2;

 	} else

 	{

 		if (p.y()>0) 

 			return (float)(M_PI  - atan ( (double)(p.x()) / (double)(p.y()) ) );

 		else	

 			if (p.x()<0)

 				return (float)( 2*M_PI - atan ( (double)(p.x()) / (double)(p.y()) ) );

 			else	

 				return (float)( - atan ( (double)(p.x()) / (double)(p.y()) ) );

 	}	

 }

 QPoint normalise(const QPoint &p)

 {	

 	// Calculate normalised position (fixed length) 

 	double px=p.x();

 	double py=p.y();

 	double x;

 	double y;

 	double r=150;

 	if (px==0)

 	{

 		x=0;

 		if (py>=0)

 			y=r;

 		else

 			y=-r;

 	} else

 	{

 		double sign;

 		double a;

 		if (px>0) 

 			sign=1; 

 		else 

 			sign=-1;

 		a=atan (py / px);

 		x=cos (a) * r *sign;

 		y=sin (a) * r *sign;

 	}	

 	return QPoint ((int) (x),(int) (y));

 }

 // returns masked "<" ">" "&"

 QString quotemeta(const QString &s)

 {

 	QString r=s;

     QRegExp  rx("&(?!amp;)");

     r.replace ( rx,"&");

     rx.setPattern( ">");

     r.replace ( rx,">");

     rx.setPattern( "<");

     r.replace ( rx,"<");

     rx.setPattern( "\"");

     r.replace ( rx,""");

     return r;

 }

 int max(int a, int b)

 {

 	if (a>b)

 		return a;

 	return b;

 }

 int xmlObj::actindent=0;		// make instance of actindent

 xmlObj::xmlObj()

 {

     indentwidth=4;

 }

 // returns <s at />

 QString xmlObj::singleElement(QString s, QString at)

 {

     return indent() + "<" + s +" " + at +" " + "/>\n";

 }

 // returns <s>

 QString xmlObj::beginElement(QString s)

 {

     return indent() + "<" + s + ">\n";

 }

 // returns <s at>

 QString xmlObj::beginElement(QString s, QString at)

 {

     return indent() + "<" + s + " " + at + ">\n";

 }

 // returns </s>

 QString xmlObj::endElement(QString s)

 {

     return indent() + "</" + s + ">\n";

 }

 // returns  at="val"

 QString xmlObj::attribut(QString at, QString val)

 {

     return " " + at + "=\"" + quotemeta (val) + "\""; 

 }

 // returns <s> val </s>

 QString xmlObj::valueElement(QString el, QString val)

 {

     return indent() + "<" + el + ">" + quotemeta(val) + "</" +el + ">\n";

 }

 // returns <s at> val </s>

 QString xmlObj::valueElement(QString el, QString val, QString at)

 {

     return indent() + "<" + el + " " + at + ">" + quotemeta(val) + "</" +el + ">\n";

 }

 void xmlObj::incIndent()

 {

     actindent++;

 }	

 void xmlObj::decIndent()

 {

     actindent--;

     if (actindent<0) actindent=0;

 }	

 QString xmlObj::indent()

 {

     QString s;

     int i;

     for (i=0; i<actindent*indentwidth; i++)

     {

 		s= s + " ";

     }

     return s;

 }