ctx - add read-only access for QFContext

qf - fix context memory leak

Merge pull request #895 from CEED/jeremylt/stray-char

qf - remove stray character

Vector: error-free path for get/take array when size=0

Among other things, this is important so that parallel callers can
easily keep collective control flow even when some subdomains (materials
or

Vector: error-free path for get/take array when size=0

Among other things, this is important so that parallel callers can
easily keep collective control flow even when some subdomains (materials
or boundary surfaces) are size 0 on some ranks.

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qf - remove stray character

op - fix small leak in composite ctx label

Added CeedElemRestrictionIsOriented function

Update interface/ceed-elemrestriction.c

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

Update interface/ceed-elemrestriction.c

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

update ceed-elemrestriction.c: fixed formatting

backends/ref: Added oriented element restriction.

ctx - add support for registering multiple contiguous values of same type

ctx - add function to access label details

ctx - add context field labels to interface

minor - move CeedFESpace enum to backend interface

H(div) basis constructor (#878)

* backends/interface: added H(div) basis constructor

* tests: CEED_EVAL_INTERP/DIV tested for H(div) basis.

* Update interface/ceed-basis.c

Co-authored-by:

H(div) basis constructor (#878)

* backends/interface: added H(div) basis constructor

* tests: CEED_EVAL_INTERP/DIV tested for H(div) basis.

* Update interface/ceed-basis.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Update interface/ceed-basis.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Update interface/ceed-basis.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Update interface/ceed-basis.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Update interface/ceed-basis.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* interface/ceed-basis.c: delete [-1,1] for non-tensor basis constructor

* Update interface/ceed-basis.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* include/ceed: added CEEDFESpace enum and used it at ceed-basis.c

* tests: added t330-basis.out and changed xhat-->x_hat

* Changed name convention for CeedElemTopology and CeedFESpace enum.

* make style

* interface/ceed-basis.c: Added FE space/topology of the basis to CeedBasisView function

* tests/output: update ...basis.out file

* Changed CEED_FE_TOPO_ ==> CEED_TOPOLOGY_

* backends/ref: delete CeedBasisApplyHdiv_Ref

* Update interface/ceed-basis.c

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

* Update interface/ceed-basis.c

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

* Update include/ceed-impl.h

Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

* interface/ceed-bassi.c: update CeedBasisView

* deleted L2 and H(curl) FE spaces

* minor - update output file

* minor - update output file

* style - consistency with main

Co-authored-by: Jed Brown <jed@jedbrown.org>
Co-authored-by: Jeremy L Thompson <jeremy@jeremylt.org>

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basis - handle null pointers to basis matrices

doc: no @return for void

vec/ctx - make backend restore function optional

op - add ctx setting interface for operators

Update GetMultiplicity function (E^T * E * 1) to work for H(div) space (#869)

* Update GetMultiplicity function (E^T * E * 1)

* Update interface/ceed-elemrestriction.c

Co-authored-by: Jed Brow

Update GetMultiplicity function (E^T * E * 1) to work for H(div) space (#869)

* Update GetMultiplicity function (E^T * E * 1)

* Update interface/ceed-elemrestriction.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* Update interface/ceed-elemrestriction.c

Co-authored-by: Jed Brown <jed@jedbrown.org>

* added comments

Co-authored-by: Jed Brown <jed@jedbrown.org>

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gpu - pull quoted kernels into separate files

utility - add CeedStringAllocCopy

ctx - style consistency

ctx - use new field registration in Identity gallery qf