1: #ifdef PETSC_RCS_HEADER
  2: static char vcid[] = "$Id: vecserialize.c,v 1.10 2000/01/10 03:18:14 knepley Exp $";
  3: #endif

 5:  #include src/vec/vecimpl.h

  7: #undef __FUNCT__  
  9: /*@C
 10:   VecCreate - Creates an empty vector object. The type can then be set with VecSetType(),
 11:   or VecSetFromOptions().

 13:    If you never  call VecSetType() or VecSetFromOptions() it will generate an 
 14:    error when you try to use the vector.

 16:   Collective on MPI_Comm

 18:   Input Parameter:
 19: . comm - The communicator for the vector object

 21:   Output Parameter:
 22: . vec  - The vector object

 24:   Level: beginner

 26: .keywords: vector, create
 27: .seealso: VecSetType(), VecSetSizes(), VecCreateMPIWithArray(), VecCreateMPI(), VecDuplicate(),
 28:           VecDuplicateVecs(), VecCreateGhost(), VecCreateSeq(), VecPlaceArray()
 29: @*/
 30: int VecCreate(MPI_Comm comm, Vec *vec)
 31: {
 32:   Vec v;

 37:   *vec = PETSC_NULL;
 38: #ifndef PETSC_USE_DYNAMIC_LIBRARIES
 39:   VecInitializePackage(PETSC_NULL);
 40: #endif

 42:   PetscHeaderCreate(v, _p_Vec, struct _VecOps, VEC_COOKIE, -1, "Vec", comm, VecDestroy, VecView);
 43:   PetscLogObjectCreate(v);
 44:   PetscLogObjectMemory(v, sizeof(struct _p_Vec));
 45:   PetscMemzero(v->ops, sizeof(struct _VecOps));
 46:   v->bops->publish  = PETSC_NULL /* VecPublish_Petsc */;
 47:   v->type_name      = PETSC_NULL;
 48:   v->serialize_name = PETSC_NULL;

 50:   v->map          = PETSC_NULL;
 51:   v->data         = PETSC_NULL;
 52:   v->n            = -1;
 53:   v->N            = -1;
 54:   v->bs           = -1;
 55:   v->mapping      = PETSC_NULL;
 56:   v->bmapping     = PETSC_NULL;
 57:   v->array_gotten = PETSC_FALSE;
 58:   v->petscnative  = PETSC_FALSE;
 59:   v->esivec       = PETSC_NULL;

 61:   *vec = v;
 62:   return(0);
 63: }

 65: #undef  __FUNCT__
 67: /*@ 
 68:   VecSerialize - This function stores or recreates a vector using a viewer for a binary file.

 70:   Collective on MPI_Comm

 72:   Input Parameters:
 73: + comm   - The communicator for the vector object
 74: . viewer - The viewer context
 75: - store  - This flag is PETSC_TRUE is data is being written, otherwise it will be read

 77:   Output Parameter:
 78: . v      - The vector

 80:   Level: beginner

 82: .keywords: vector, serialize
 83: .seealso: GridSerialize()
 84: @*/
 85: int VecSerialize(MPI_Comm comm, Vec *v, PetscViewer viewer, PetscTruth store)
 86: {
 87:   int      (*serialize)(MPI_Comm, Vec *, PetscViewer, PetscTruth);
 88:   int        fd, len;
 89:   char      *name;
 90:   PetscTruth match;
 91:   int        ierr;


 97:   PetscTypeCompare((PetscObject) viewer, PETSC_VIEWER_BINARY, &match);
 98:   if (match == PETSC_FALSE) SETERRQ(PETSC_ERR_ARG_WRONG, "Must be binary viewer");
 99:   PetscViewerBinaryGetDescriptor(viewer, &fd);

101:   if (VecSerializeRegisterAllCalled == PETSC_FALSE) {
102:     VecSerializeRegisterAll(PETSC_NULL);
103:   }
104:   if (VecSerializeList == PETSC_NULL) SETERRQ(PETSC_ERR_ARG_CORRUPT, "Could not find table of methods");

106:   if (store) {
108:     PetscStrlen((*v)->class_name, &len);
109:     PetscBinaryWrite(fd, &len,                  1,   PETSC_INT,  0);
110:     PetscBinaryWrite(fd,  (*v)->class_name,     len, PETSC_CHAR, 0);
111:     PetscStrlen((*v)->serialize_name, &len);
112:     PetscBinaryWrite(fd, &len,                  1,   PETSC_INT,  0);
113:     PetscBinaryWrite(fd,  (*v)->serialize_name, len, PETSC_CHAR, 0);
114:     PetscFListFind(comm, VecSerializeList, (*v)->serialize_name, (void (**)(void)) &serialize);
115:     if (!serialize) SETERRQ(PETSC_ERR_ARG_WRONG, "Type cannot be serialized");
116:     (*serialize)(comm, v, viewer, store);
117:   } else {
118:     PetscBinaryRead(fd, &len,    1,   PETSC_INT);
119:     PetscMalloc((len+1) * sizeof(char), &name);
120:     name[len] = 0;
121:     PetscBinaryRead(fd,  name,   len, PETSC_CHAR);
122:     PetscStrcmp(name, "Vec", &match);
123:     PetscFree(name);
124:     if (match == PETSC_FALSE) SETERRQ(PETSC_ERR_ARG_WRONG, "Non-vector object");
125:     /* Dispatch to the correct routine */
126:     PetscBinaryRead(fd, &len,    1,   PETSC_INT);
127:     PetscMalloc((len+1) * sizeof(char), &name);
128:     name[len] = 0;
129:     PetscBinaryRead(fd,  name,   len, PETSC_CHAR);
130:     PetscFListFind(comm, VecSerializeList, name, (void (**)(void)) &serialize);
131:     if (!serialize) SETERRQ(PETSC_ERR_ARG_WRONG, "Type cannot be serialized");
132:     (*serialize)(comm, v, viewer, store);
133:     PetscStrfree((*v)->serialize_name);
134:     (*v)->serialize_name = name;
135:   }
136: 
137:   return(0);
138: }