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Reference documentation for deal.II version 8.1.0
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Auxiliary class aiding in the handling of block structures like in BlockVector or FESystem. More...
#include <block_indices.h>
Public Types | |
typedef types::global_dof_index | size_type |
Public Member Functions | |
BlockIndices () | |
BlockIndices (const std::vector< size_type > &n) | |
BlockIndices (const unsigned int n_blocks, const size_type block_size=0) | |
void | reinit (const unsigned int n_blocks, const size_type n_elements_per_block) |
void | reinit (const std::vector< size_type > &n) |
void | push_back (const size_type size) |
BlockIndices & | operator= (const BlockIndices &b) |
bool | operator== (const BlockIndices &b) const |
void | swap (BlockIndices &b) |
std::size_t | memory_consumption () const |
Size information | |
unsigned int | size () const |
size_type | total_size () const |
size_type | block_size (const unsigned int i) const |
Index conversion | |
Functions in this group assume an object, which was created after sorting by block, such that each block forms a set of consecutive indices in the object. If applied to other objects, the numbers obtained from these functions are meaningless. | |
std::pair< unsigned int, size_type > | global_to_local (const size_type i) const |
size_type | local_to_global (const unsigned int block, const size_type index) const |
size_type | block_start (const unsigned int i) const |
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Subscriptor () | |
Subscriptor (const Subscriptor &) | |
virtual | ~Subscriptor () |
Subscriptor & | operator= (const Subscriptor &) |
void | subscribe (const char *identifier=0) const |
void | unsubscribe (const char *identifier=0) const |
unsigned int | n_subscriptions () const |
void | list_subscribers () const |
DeclException3 (ExcInUse, int, char *, std::string &,<< "Object of class "<< arg2<< " is still used by "<< arg1<< " other objects.\n"<< "(Additional information: "<< arg3<< ")\n"<< "Note the entry in the Frequently Asked Questions of "<< "deal.II (linked to from http://www.dealii.org/) for "<< "more information on what this error means.") | |
DeclException2 (ExcNoSubscriber, char *, char *,<< "No subscriber with identifier \""<< arg2<< "\" did subscribe to this object of class "<< arg1) | |
template<class Archive > | |
void | serialize (Archive &ar, const unsigned int version) |
Private Attributes | |
unsigned int | n_blocks |
std::vector< size_type > | start_indices |
Related Functions | |
(Note that these are not member functions.) | |
void | swap (BlockIndices &u, BlockIndices &v) |
Auxiliary class aiding in the handling of block structures like in BlockVector or FESystem.
The information obtained from this class falls into two groups. First, it is possible to obtain the number of blocks, namely size(), the block_size() for each block and the total_size() of the object described by the block indices, namely the length of the whole index set. These functions do not make any assumption on the ordering of the index set.
If on the other hand the index set is ordered "by blocks", such that each block forms a consecutive set of indices, this class that manages the conversion of global indices into a block vector or matrix to the local indices within this block. This is required, for example, when you address a global element in a block vector and want to know which element within which block this is. It is also useful if a matrix is composed of several blocks, where you have to translate global row and column indices to local ones.
Definition at line 55 of file block_indices.h.
Declare the type for container size.
Definition at line 61 of file block_indices.h.
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inline |
Default constructor. Initialize for zero blocks.
Definition at line 368 of file block_indices.h.
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inline |
Constructor. Initialize the number of entries in each block i
as n[i]
. The number of blocks will be the size of the vector
Definition at line 391 of file block_indices.h.
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inlineexplicit |
Specialized constructor for a structure with blocks of equal size.
Definition at line 377 of file block_indices.h.
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inline |
Reinitialize the number of blocks and assign each block the same number of elements.
Definition at line 341 of file block_indices.h.
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inline |
Reinitialize the number of indices within each block from the given argument. The number of blocks will be adjusted to the size of n
and the size of block i
is set to n[i]
.
Definition at line 354 of file block_indices.h.
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inline |
Add another block of given size to the end of the block structure.
Definition at line 402 of file block_indices.h.
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inline |
Number of blocks in index field.
Definition at line 441 of file block_indices.h.
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inline |
Return the total number of indices accumulated over all blocks, that is, the dimension of the vector space of the block vector.
Definition at line 450 of file block_indices.h.
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inline |
The size of the ith
block.
Definition at line 460 of file block_indices.h.
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inline |
Return the block and the index within that block for the global index i
. The first element of the pair is the block, the second the index within it.
Definition at line 412 of file block_indices.h.
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inline |
Return the global index of index
in block block
.
Definition at line 428 of file block_indices.h.
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inline |
The start index of the ith block.
Definition at line 470 of file block_indices.h.
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inline |
Copy operator.
Definition at line 480 of file block_indices.h.
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inline |
Compare whether two objects are the same, i.e. whether the number of blocks and the sizes of all blocks are equal.
Definition at line 491 of file block_indices.h.
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inline |
Swap the contents of these two objects.
Definition at line 507 of file block_indices.h.
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inline |
Determine an estimate for the memory consumption (in bytes) of this object.
Definition at line 520 of file block_indices.h.
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related |
Global function swap
which overloads the default implementation of the C++ standard library which uses a temporary object. The function simply exchanges the data of the two objects.
Definition at line 540 of file block_indices.h.
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private |
Number of blocks. While this value could be obtained through start_indices.size()-1
, we cache this value for faster access.
Definition at line 211 of file block_indices.h.
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private |
Global starting index of each vector. The last and redundant value is the total number of entries.
Definition at line 219 of file block_indices.h.