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116 lines
2.7 KiB
C++
116 lines
2.7 KiB
C++
#ifndef FILE_NGSTREAM
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#define FILE_NGSTREAM
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/**************************************************************************/
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/* File: ng(s)stream.hpp */
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/* Author: Joachim Schoeberl */
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/* Date: 20. Jul. 2011 */
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/**************************************************************************/
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// #include <ios>
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// #include <iostream>
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namespace ngcore
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{
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NGCORE_API extern int printmessage_importance;
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// important message
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class IM
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{
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int value;
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public:
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IM (int val) : value(val) { ; }
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int Value () const { return value; }
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};
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class trunc
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{
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double eps;
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public:
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trunc (double aeps) : eps(aeps) { ; }
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double Eps() const { return eps; }
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};
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class NGSOStream
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{
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std::ostream & ost;
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bool active;
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NGCORE_API static bool glob_active;
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double trunc;
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public:
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NGSOStream (std::ostream & aost, bool aactive)
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: ost(aost), active(aactive), trunc(-1) { ; }
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NGSOStream & SetTrunc (double atrunc) { trunc = atrunc; return *this; }
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double GetTrunc () const { return trunc; }
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bool Active () const { return active && glob_active; }
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std::ostream & GetStream () { return ost; }
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static void SetGlobalActive (bool b) { glob_active = b; }
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};
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inline NGSOStream operator<< (std::ostream & ost, const IM & im)
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{
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return NGSOStream (ost,
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(im.Value() <= printmessage_importance));
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}
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/*
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// doesn't work for matrices
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inline NGSOStream operator<< (ostream & ost, trunc tr)
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{
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cout << "set trunc modifier" << endl;
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return NGSOStream (ost, true).SetTrunc (tr.Eps());
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}
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*/
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template <typename T>
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inline NGSOStream operator<< (NGSOStream ngsost, const T & data)
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{
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if (ngsost.Active())
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ngsost.GetStream() << data;
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return ngsost;
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}
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/*
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inline NGSOStream operator<< (NGSOStream ngsost, const double & data)
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{
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cout << "double out" << endl;
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if (ngsost.Active())
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{
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double hdata = data;
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if (fabs (hdata) < ngsost.GetTrunc()) hdata = 0.0;
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ngsost.GetStream() << hdata;
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}
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return ngsost;
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}
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*/
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inline NGSOStream operator<< (NGSOStream ngsost, std::ostream& ( *pf )(std::ostream&))
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{
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if ( ngsost.Active() )
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ngsost.GetStream() << (*pf);
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return ngsost;
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}
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inline NGSOStream operator<< (NGSOStream ngsost, std::ios& ( *pf )(std::ios&))
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{
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if ( ngsost.Active() )
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ngsost.GetStream() << (*pf);
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return ngsost;
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}
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inline NGSOStream operator<< (NGSOStream ngsost, std::ios_base& ( *pf )(std::ios_base&))
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{
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if ( ngsost.Active() )
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ngsost.GetStream() << (*pf);
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return ngsost;
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}
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}
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#endif
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