2:  #include <../src/vec/pf/pfimpl.h>
  3:  #include <petscmatlab.h>

  5: /*
  6:         Ths PF generates a MATLAB function on the fly
  7: */
  8: typedef struct {
  9:   PetscInt          dimin,dimout;
 10:   PetscMatlabEngine mengine;
 11:   char              *string;
 12: } PF_Matlab;

 14: PetscErrorCode PFView_Matlab(void *value,PetscViewer viewer)
 15: {
 17:   PetscBool      iascii;
 18:   PF_Matlab      *matlab = (PF_Matlab*)value;

 21:   PetscObjectTypeCompare((PetscObject)viewer,PETSCVIEWERASCII,&iascii);
 22:   if (iascii) {
 23:     PetscViewerASCIIPrintf(viewer,"Matlab Matlab = %s\n",matlab->string);
 24:   }
 25:   return(0);
 26: }

 28: PetscErrorCode PFDestroy_Matlab(void *value)
 29: {
 31:   PF_Matlab      *matlab = (PF_Matlab*)value;

 34:   PetscFree(matlab->string);
 35:   PetscMatlabEngineDestroy(&matlab->mengine);
 36:   PetscFree(matlab);
 37:   return(0);
 38: }

 40: PetscErrorCode PFApply_Matlab(void *value,PetscInt n,const PetscScalar *in,PetscScalar *out)
 41: {
 42:   PF_Matlab      *matlab = (PF_Matlab*)value;

 46:   if (!value) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_ARG_WRONGSTATE,"Need to set string for MATLAB function, via -pf_matlab string");
 47:   PetscMatlabEnginePutArray(matlab->mengine,matlab->dimin,n,in,"x");
 48:   PetscMatlabEngineEvaluate(matlab->mengine,matlab->string);
 49:   PetscMatlabEngineGetArray(matlab->mengine,matlab->dimout,n,out,"f");
 50:   return(0);
 51: }

 53: PetscErrorCode PFSetFromOptions_Matlab(PetscOptionItems *PetscOptionsObject,PF pf)
 54: {
 56:   PetscBool      flag;
 57:   char           value[256];
 58:   PF_Matlab      *matlab = (PF_Matlab*)pf->data;

 61:   PetscOptionsHead(PetscOptionsObject,"Matlab function options");
 62:   PetscOptionsString("-pf_matlab","Matlab function","None","",value,256,&flag);
 63:   if (flag) {
 64:     PetscStrallocpy((char*)value,&matlab->string);
 65:   }
 66:   PetscOptionsTail();
 67:   return(0);
 68: }

 70: PETSC_EXTERN PetscErrorCode PFCreate_Matlab(PF pf,void *value)
 71: {
 73:   PF_Matlab      *matlab;

 76:   PetscNewLog(pf,&matlab);
 77:   matlab->dimin  = pf->dimin;
 78:   matlab->dimout = pf->dimout;

 80:   PetscMatlabEngineCreate(PetscObjectComm((PetscObject)pf),NULL,&matlab->mengine);

 82:   if (value) {
 83:     PetscStrallocpy((char*)value,&matlab->string);
 84:   }
 85:   PFSet(pf,PFApply_Matlab,NULL,PFView_Matlab,PFDestroy_Matlab,matlab);

 87:   pf->ops->setfromoptions = PFSetFromOptions_Matlab;
 88:   return(0);
 89: }