DUNE-FEM (unstable)

iotuple.hh
1#ifndef DUNE_FEM_INPUTOUTPUTTUPLES_HH
2#define DUNE_FEM_INPUTOUTPUTTUPLES_HH
3
4#include <sstream>
5#include <string>
6#include <type_traits>
7#include <tuple>
8#include <utility>
9
10#include <dune/common/hybridutilities.hh>
11
12#include <dune/grid/common/backuprestore.hh>
13
14#include <dune/fem/io/file/persistencemanager.hh>
15#include <dune/fem/io/file/iointerface.hh>
16#include <dune/fem/io/parameter.hh>
17#include <dune/fem/space/common/dofmanager.hh>
18
19namespace Dune
20{
21
22 namespace Fem
23 {
24
25 // IOTupleBase
26 // -----------
27
28 struct IOTupleBase
29 {
30 // take binary stream types from PersistenceManager (overload with define)
31 typedef PersistenceManager :: BackupStreamType OutStreamType ;
32 typedef PersistenceManager :: RestoreStreamType InStreamType ;
33 static const bool singleBackupRestoreFile = PersistenceManager :: singleBackupRestoreFile;
34
35 // return path/ prefix name as one string
36 static std::string pathAndName(const std::string& path, const std::string& name, const std::string& suffix)
37 {
38 std::string comboname;
39 if (path != "")
40 comboname += path;
41 else
42 comboname += ".";
43
44 comboname += "/";
45 comboname += name;
46 comboname += suffix;
47 return comboname;
48 }
49
50 // return grids name
51 static std::string gridName(const std::string& path, const std::string& name)
52 {
53 return pathAndName(path,name,"_grid");
54 }
55
56 // return datas name
57 static std::string dataName(const std::string& path, const std::string& name)
58 {
59 return pathAndName(path,name,"_data");
60 }
61
62 // return name with rank
63 static std::string rankName(const std::string& path, const std::string& name,
64 const int rank, const int size )
65 {
66 std::stringstream rankStr;
67 const int number = ( singleBackupRestoreFile ) ? size : rank ;
68 // add rank if output/input is with different files
69 rankStr << "." << number ;
70 return pathAndName(path,name,rankStr.str());
71 }
72
73 template < class GridType >
74 static void
75 restoreGrid(GridType *&grid,
76 InStreamType& inStream,
77 const std::string& filename )
78 {
79 try
80 {
81 // get standard istream
82 std::istream& stream = inStream.stream();
83 // restore grid from stream (grid implementation has to take care of byte order)
85 }
86 catch ( NotImplemented )
87 {
88 // write grid to file with filename + extension
90 }
91
92 if( grid == 0 )
93 DUNE_THROW(IOError,"Unable to restore grid" );
94 }
95
96 template <class GridType>
97 static void
98 restoreDofManager ( const GridType& grid,
99 InStreamType& inStream )
100 {
101 // type of DofManager
102 typedef DofManager<GridType> DofManagerType;
103
104 // read DofManager's index sets
105 DofManagerType& dm = DofManagerType :: instance ( grid );
106
107 // read data
108 dm.read( inStream );
109
110 // resize data
111 dm.resizeForRestrict();
112 }
113
115 template < class GridType >
116 static
117 void writeGrid( const GridType& grid,
118 OutStreamType& outStream,
119 const std::string& filename )
120 {
121 try
122 {
123 // get standard ostream
124 std::ostream& stream = outStream.stream();
125 // write grid to stream (grid implementation has to take care of byte order)
127 }
128 catch ( const NotImplemented& )
129 {
130 // write grid to file with filename + extension
132 }
133
134 // type of DofManager
135 typedef DofManager< GridType > DofManagerType;
136
137 // get DofManager reference
138 DofManagerType& dm = DofManagerType :: instance ( grid );
139
140 // write DofManager's index sets
141 dm.write( outStream );
142 }
143 };
144
145
146
147 // IOTuple
148 // -------
149
150 template< class Tuple >
151 class IOTuple
152 : public IOTupleBase
153 {
154 template< int N > struct CreateData;
155 template< int N > struct RestoreStream;
156 template< int N > struct OutputStream;
157 template< int N > struct AddToDisplay;
158 template< int N > struct AddToDisplayOrRemove;
159 template< int N > struct RemoveData;
160
161 public:
162 static const int length = std::tuple_size< Tuple >::value;
163
164 typedef Tuple ReturnType ;
165
166 template < class GridType >
167 static Tuple *input ( GridType *&grid,
168 double& time,
169 const int rank,
170 const int size,
171 const std::string &path,
172 const std::string &name )
173 {
174 // true if grid has to be read
175 const bool newGrid = (grid == 0);
176 assert( newGrid );
177
178 // get filename
179 std::string filename = rankName( path, name, rank, size );
180
181 if( Parameter :: verbose () )
182 std::cout << "IOTuple: Reading data from " << filename << std::endl;
183
184 // create binary stream
185 InStreamType& inStream = *(Fem :: StreamFactory< InStreamType > :: create( filename, rank ));
186
187 if( newGrid )
188 {
189 // create and read grid
190 IOTupleBase::restoreGrid( grid, inStream, filename );
191 }
192
193 // create all data
194 Tuple *ret = new Tuple;
195 Hybrid::forEach( std::make_index_sequence< length >{},
196 [&]( auto i ) { CreateData<i>::apply( *grid, *ret ); });
197
198 if( newGrid )
199 {
200 // now read dofmanager and index sets
201 IOTupleBase::restoreDofManager( *grid, inStream );
202 }
203
204 // get simulation time of data
205 inStream >> time ;
206
207 // now read all data
208 Hybrid::forEach( std::make_index_sequence< length >{},
209 [&]( auto i ) { RestoreStream<i>::apply( inStream, *ret ); });
210
212 std::cout << " FINISHED!" << std::endl;
213
214 // delete stream which was created by the StreamFactory
215 delete &inStream;
216
217 return ret;
218 }
219
221 template< class GridType >
222 static void restoreData ( Tuple &data,
223 const GridType &grid,
224 const std::string &path,
225 const std::string &name )
226 {
227 // get filename
228 std::string filename =
229 rankName( path, name, grid.comm().rank(), grid.comm().size() );
230
231 // create binary stream
232 InStreamType inStream( filename );
233
234 // read all data now
235 Hybrid::forEach( std::make_index_sequence< length >{},
236 [&]( auto i ) { RestoreStream<i>::apply( inStream, data ); });
237 }
238
240 template< class GridType >
241 static void output ( const GridType &grid,
242 const double time,
243 const std::string &path,
244 const std::string &name,
245 const Tuple &tuple )
246 {
247 // get filename
248 std::string filename =
249 rankName( path, name, grid.comm().rank(), grid.comm().size() );
250
251 // create binary stream
252 OutStreamType& outStream = *(Fem :: StreamFactory< OutStreamType > :: create( filename ));
253
254 // write grid, either to binaryStream or with given filename
255 writeGrid( grid, outStream, filename );
256
257 // save simulation time of data
258 outStream << time;
259
260 // write data to stream
261 Hybrid::forEach( std::make_index_sequence< length >{},
262 [&]( auto i ) { OutputStream<i>::apply( outStream, tuple ); });
263
264 // delete stream created by StreamFactory
265 delete &outStream;
266 }
267
268 template< class Disp, class DINFO >
269 static void addToDisplay ( Disp &disp, const DINFO *dinf, double time, Tuple &tuple )
270 {
271 Hybrid::forEach( std::make_index_sequence< length >{},
272 [&]( auto i ) { AddToDisplay<i>::apply( disp, dinf, time, tuple ); });
273 }
274
275 template< class Disp, class DINFO >
276 static void addToDisplayOrRemove ( Disp &disp, const DINFO *dinf, double time, Tuple &tuple )
277 {
278 Hybrid::forEach( std::make_index_sequence< length >{},
279 [&]( auto i ) { AddToDisplayOrRemove<i>::apply( disp, dinf, time, tuple ); });
280 }
281
282 template< class Disp >
283 static void addToDisplay ( Disp &disp, Tuple &tuple )
284 {
285 Hybrid::forEach( std::make_index_sequence< length >{},
286 [&]( auto i ) { AddToDisplay<i>::apply( disp, tuple ); });
287 }
288
289 static void removeData ( Tuple &tuple )
290 {
291 Hybrid::forEach( std::make_index_sequence< length >{},
292 [&]( auto i ) { RemoveData<i>::apply( tuple ); });
293 }
294 };
295
296
297 template< class Tuple >
298 template< int N >
299 struct IOTuple< Tuple >::CreateData
300 {
301 typedef typename std::remove_pointer< typename std::tuple_element< N, Tuple >::type >::type DiscreteFunction;
302 typedef typename DiscreteFunction::DiscreteFunctionSpaceType DiscreteFunctionSpace;
303 typedef typename DiscreteFunctionSpace::GridPartType GridPart;
304
305 template< class Grid >
306 static void apply ( Grid &grid, Tuple &tuple )
307 {
308 GridPart *gridPart = new GridPart( grid );
309 DiscreteFunctionSpace *space = new DiscreteFunctionSpace( *gridPart );
310 std::get< N >( tuple ) = new DiscreteFunction( "", *space );
311 }
312 };
313
314 template< class Tuple >
315 template< int N >
316 struct IOTuple< Tuple >::RestoreStream
317 {
318 typedef typename std::remove_pointer< typename std::tuple_element< N, Tuple >::type >::type DiscreteFunction;
319
320 template< class StreamTraits >
321 static void apply ( InStreamInterface< StreamTraits > &inStream, Tuple &tuple )
322 {
323 DiscreteFunction *df = std::get< N >( tuple );
324 bool readDF = false ;
325 inStream >> readDF ;
326 // if discrete function was written, we can read it
327 if( readDF )
328 {
329 if( df )
330 df->read( inStream );
331 else
332 DUNE_THROW(InvalidStateException,"no discrete function on input");
333 }
334 }
335 };
336
337 template< class Tuple >
338 template< int N >
339 struct IOTuple< Tuple >::OutputStream
340 {
341 typedef typename std::remove_pointer< typename std::tuple_element< N, Tuple >::type >::type DiscreteFunction;
342
344 template< class StreamTraits >
345 static void apply ( OutStreamInterface< StreamTraits > &outStream, const Tuple &tuple )
346 {
347 const DiscreteFunction *df = std::get< N >( tuple );
348 const bool writeDF = ( df != 0 );
349
350 // write flag whether discrete function was written, for later restore
351 outStream << writeDF ;
352
353 // if pointer is valid: write function to stream
354 if( writeDF )
355 {
356 df->write( outStream );
357 }
358 }
359 };
360
361 template< class Tuple >
362 template< int N >
363 struct IOTuple< Tuple >::AddToDisplay
364 {
365 // revert tuple order to reverse deletion to creation
366 static const int pos = std::tuple_size< Tuple >::value - 1 - N;
367
368 typedef typename std::remove_pointer< typename std::tuple_element< pos, Tuple >::type >::type DiscreteFunction;
369
370 template< class Disp, class DINFO >
371 static void apply ( Disp &disp, const DINFO *&dinf, const double &time, Tuple &tuple )
372 {
373 DiscreteFunction *df = std::get< pos >( tuple );
374 if( df )
375 {
376 assert( dinf->comp );
377 std::cout << "adding to display " << dinf->name << std::endl;
378 disp.addData( *df, dinf, time );
379 }
380 }
381
382 template< class Disp >
383 static void apply ( Disp &disp, Tuple &tuple )
384 {
385 DiscreteFunction *df = std::get< pos >( tuple );
386 if( df )
387 {
388 disp.addData( *df );
389 }
390 }
391 };
392
393
394 template< class Tuple >
395 template< int N >
396 struct IOTuple< Tuple >::AddToDisplayOrRemove
397 {
398 template< class Disp, class DINFO >
399 static void apply ( Disp &disp, const DINFO *&dinf, const double &time, Tuple &tuple )
400 {
401 if( dinf->comp )
402 AddToDisplay< N >::apply( disp, dinf, time, tuple );
403 else
404 // RemoveData reverts N itself
405 RemoveData< N >::apply( tuple );
406 }
407 };
408
409
410 template< class Tuple >
411 template< int N >
412 struct IOTuple< Tuple >::RemoveData
413 {
414 // revert tuple order to reverse deletion to creation
415 static const int pos = std::tuple_size< Tuple >::value - 1 - N;
416 typedef typename std::remove_pointer< typename std::tuple_element< pos, Tuple >::type >::type DiscreteFunction;
417 typedef typename DiscreteFunction::DiscreteFunctionSpaceType DiscreteFunctionSpace;
418 typedef typename DiscreteFunctionSpace::GridPartType GridPart;
419
420 static void apply ( Tuple &tuple )
421 {
422 DiscreteFunction *&df = std::get< pos >( tuple );
423 if( df )
424 {
425 const DiscreteFunctionSpace *space = &(df->space());
426 const GridPart *gridPart = &(space->gridPart());
427
428 delete df;
429 delete space;
430 delete gridPart;
431 df = 0;
432 }
433 }
434 };
435
436
437
438 // IOTuple for empty tuple
439 // -----------------------
440
441 template<>
442 class IOTuple< std::tuple<> >
443 : public IOTupleBase
444 {
445 typedef std::tuple<> Tuple;
446
447 public:
448 static const int length = 0;
449
450 template <class DataIO,class GridType>
451 static Tuple *input ( DataIO &dataio, GridType *&grid, double &t, int n,
452 const std::string &path, const std::string &name )
453 {
454 return new Tuple();
455 }
456
458 template< class GridType >
459 static void restoreData ( Tuple &data,
460 const GridType &grid,
461 const std::string &path,
462 const std::string &name )
463 {
464 // nothing to do here
465 }
466
468 template< class GridType >
469 static void output ( const GridType &grid,
470 const double time,
471 const std::string &path,
472 const std::string &name,
473 const Tuple &tuple )
474 {
475 // get filename
476 std::string filename =
477 rankName( path, name, grid.comm().rank(), grid.comm().size() );
478
479 // create binary stream
480 OutStreamType outStream( filename );
481
482 // write grid, either to binaryStream or with given filename
483 writeGrid( grid, outStream, filename );
484
485 // save simulation time of data
486 outStream << time ;
487 }
488
489 template< class Disp, class DINFO >
490 static void addToDisplay ( Disp &disp, const DINFO *dinf, double time, Tuple &tuple )
491 {}
492
493 template< class Disp, class DINFO >
494 static void addToDisplayOrRemove ( Disp &disp, const DINFO *dinf, double time, Tuple &tuple )
495 {}
496
497 template< class Disp >
498 static void addToDisplay ( Disp &disp, Tuple &tuple )
499 {}
500
501 static void removeData ( Tuple &tuple )
502 {}
503 };
504
505 } // namespace Fem
506
507} // namespace Dune
508
509#endif // #ifndef DUNE_FEM_INPUTOUTPUTTUPLES_HH
discrete function space
static bool verbose()
obtain the cached value for fem.verbose with default verbosity level 2
Definition: parameter.hh:466
#define DUNE_THROW(E, m)
Definition: exceptions.hh:218
constexpr void forEach(Range &&range, F &&f)
Range based for loop.
Definition: hybridutilities.hh:256
Dune namespace.
Definition: alignedallocator.hh:13
constexpr std::integral_constant< std::size_t, sizeof...(II)> size(std::integer_sequence< T, II... >)
Return the size of the sequence.
Definition: integersequence.hh:75
STL namespace.
static Grid * restore(const std::string &filename)
read a hierarchic grid from disk
Definition: backuprestore.hh:78
static void backup(const Grid &grid, const std::string &filename)
write a hierarchic grid to disk
Definition: backuprestore.hh:51
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