1: /*$Id: viewers.c,v 1.16 2001/04/10 19:34:10 bsmith Exp $*/

 3:  #include petscviewer.h

  5: struct _p_PetscViewers {
  6:    MPI_Comm    comm;
  7:    PetscViewer *viewer;
  8:    int         n;
  9: } ;

 11: #undef __FUNCT__  
 13: /*@C
 14:    PetscViewersDestroy - Destroys a set of PetscViewers created with PetscViewersCreate().

 16:    Collective on PetscViewers

 18:    Input Parameters:
 19: .  v - the PetscViewers to be destroyed.

 21:    Level: intermediate

 23: .seealso: PetscViewerSocketOpen(), PetscViewerASCIIOpen(), PetscViewerCreate(), PetscViewerDrawOpen(), PetscViewersCreate()

 25: @*/
 26: int PetscViewersDestroy(PetscViewers v)
 27: {
 28:   int         i,ierr;

 31:   for (i=0; i<v->n; i++) {
 32:     if (v->viewer[i]) {PetscViewerDestroy(v->viewer[i]);}
 33:   }
 34:   PetscFree(v->viewer);
 35:   PetscFree(v);
 36:   return(0);
 37: }

 39: #undef __FUNCT__  
 41: /*@C
 42:    PetscViewersCreate - Creates a container to hold a set of PetscViewers.

 44:    Collective on MPI_Comm

 46:    Input Parameter:
 47: .   comm - the MPI communicator

 49:    Output Parameter:
 50: .  PetscViewers - the collection of PetscViewers

 52:    Level: intermediate

 54:    Concepts: PetscViewer^array of

 56: .seealso: PetscViewerCreate(), PetscViewersDestroy()

 58: @*/
 59: int PetscViewersCreate(MPI_Comm comm,PetscViewers *v)
 60: {

 64:   ierr         = PetscNew(struct _p_PetscViewers,v);
 65:   (*v)->n      = 64;
 66:   (*v)->comm   = comm;
 67:   PetscMalloc(64*sizeof(PetscViewer),&(*v)->viewer);
 68:   PetscMemzero((*v)->viewer,64*sizeof(PetscViewer));
 69:   return(0);
 70: }

 72: #undef __FUNCT__  
 74: /*@C
 75:    PetscViewersGetViewer - Gets a PetscViewer from a PetscViewer collection

 77:    Not Collective, but PetscViewer will be collective object on PetscViewers

 79:    Input Parameter:
 80: +   viewers - object created with PetscViewersCreate()
 81: -   n - number of PetscViewer you want

 83:    Output Parameter:
 84: .  viewer - the PetscViewer

 86:    Level: intermediate

 88:    Concepts: PetscViewer^array of

 90: .seealso: PetscViewersCreate(), PetscViewersDestroy()

 92: @*/
 93: int PetscViewersGetViewer(PetscViewers viewers,int n,PetscViewer *viewer)
 94: {

 98:   if (n < 0) SETERRQ1(PETSC_ERR_ARG_OUTOFRANGE,"Cannot access using a negative index - %dn",n);
 99:   if (n >= viewers->n) {
100:     PetscViewer *v;
101:     int    newn = n + 64; /* add 64 new ones at a time */
102: 
103:     PetscMalloc(newn*sizeof(PetscViewer),&v);
104:     PetscMemzero(v,newn*sizeof(PetscViewer));
105:     PetscMemcpy(v,viewers->viewer,viewers->n*sizeof(PetscViewer));
106:     PetscFree(viewers->viewer);
107:     viewers->viewer = v;
108:   }
109:   if (!viewers->viewer[n]) {
110:     PetscViewerCreate(viewers->comm,&viewers->viewer[n]);
111:   }
112:   *viewer = viewers->viewer[n];
113:   return(0);
114: }