Date: 2016-07-24T17:11:30+00:00

Actual source code: trajbasic.c
petsc-3.7.3 2016-07-24
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      2: #include <petsc/private/tsimpl.h>        /*I "petscts.h"  I*/

      6: static PetscErrorCode OutputBIN(const char *filename,PetscViewer *viewer)
      7: {

     11:   PetscViewerCreate(PETSC_COMM_WORLD,viewer);
     12:   PetscViewerSetType(*viewer,PETSCVIEWERBINARY);
     13:   PetscViewerFileSetMode(*viewer,FILE_MODE_WRITE);
     14:   PetscViewerFileSetName(*viewer,filename);
     15:   return(0);
     16: }

     20: static PetscErrorCode TSTrajectorySet_Basic(TSTrajectory tj,TS ts,PetscInt stepnum,PetscReal time,Vec X)
     21: {
     22:   PetscViewer    viewer;
     23:   PetscInt       ns,i;
     24:   Vec            *Y;
     25:   char           filename[PETSC_MAX_PATH_LEN];
     26:   PetscReal      tprev;

     30:   TSGetTotalSteps(ts,&stepnum);
     31:   if (stepnum == 0) {
     32:     PetscMPIInt rank;
     33:     MPI_Comm_rank(PetscObjectComm((PetscObject)ts),&rank);
     34:     if (!rank) {
     35:       PetscRMTree("SA-data");
     36:       PetscMkdir("SA-data");
     37:     }
     38:     PetscSNPrintf(filename,sizeof(filename),"SA-data/SA-%06d.bin",stepnum);
     39:     OutputBIN(filename,&viewer);
     40:     VecView(X,viewer);
     41:     PetscViewerBinaryWrite(viewer,&time,1,PETSC_REAL,PETSC_FALSE);
     42:     PetscViewerDestroy(&viewer);
     43:     return(0);
     44:   }
     45:   PetscSNPrintf(filename,sizeof(filename),"SA-data/SA-%06d.bin",stepnum);
     46:   OutputBIN(filename,&viewer);
     47:   VecView(X,viewer);
     48:   PetscViewerBinaryWrite(viewer,&time,1,PETSC_REAL,PETSC_FALSE);

     50:   TSGetStages(ts,&ns,&Y);
     51:   for (i=0;i<ns;i++) {
     52:     VecView(Y[i],viewer);
     53:   }

     55:   TSGetPrevTime(ts,&tprev);
     56:   PetscViewerBinaryWrite(viewer,&tprev,1,PETSC_REAL,PETSC_FALSE);

     58:   PetscViewerDestroy(&viewer);
     59:   return(0);
     60: }

     64: static PetscErrorCode TSTrajectoryGet_Basic(TSTrajectory tj,TS ts,PetscInt stepnum,PetscReal *t)
     65: {
     66:   Vec            Sol,*Y;
     67:   PetscInt       Nr,i;
     68:   PetscViewer    viewer;
     69:   PetscReal      timepre;
     70:   char           filename[PETSC_MAX_PATH_LEN];

     74:   TSGetTotalSteps(ts,&stepnum);
     75:   PetscSNPrintf(filename,sizeof filename,"SA-data/SA-%06d.bin",stepnum);
     76:   PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer);

     78:   TSGetSolution(ts,&Sol);
     79:   VecLoad(Sol,viewer);

     81:   PetscViewerBinaryRead(viewer,t,1,NULL,PETSC_REAL);

     83:   if (stepnum != 0) {
     84:     TSGetStages(ts,&Nr,&Y);
     85:     for (i=0;i<Nr ;i++) {
     86:       VecLoad(Y[i],viewer);
     87:     }
     88:     PetscViewerBinaryRead(viewer,&timepre,1,NULL,PETSC_REAL);
     89:     TSSetTimeStep(ts,-(*t)+timepre);
     90:   }

     92:   PetscViewerDestroy(&viewer);
     93:   return(0);
     94: }

     96: /*MC
     97:       TSTRAJECTORYBASIC - Stores each solution of the ODE/ADE in a file

     99:   Level: intermediate

    101: .seealso:  TSTrajectoryCreate(), TS, TSTrajectorySetType()

    103: M*/
    106: PETSC_EXTERN PetscErrorCode TSTrajectoryCreate_Basic(TSTrajectory tj,TS ts)
    107: {
    109:   tj->ops->set  = TSTrajectorySet_Basic;
    110:   tj->ops->get  = TSTrajectoryGet_Basic;
    111:   return(0);
    112: }