xref: /libCEED/gallery/identity/ceed-identity.c (revision cb32e2e7f026784d97a57f1901677e9727def907)
1 // Copyright (c) 2017-2018, Lawrence Livermore National Security, LLC.
2 // Produced at the Lawrence Livermore National Laboratory. LLNL-CODE-734707.
3 // All Rights reserved. See files LICENSE and NOTICE for details.
4 //
5 // This file is part of CEED, a collection of benchmarks, miniapps, software
6 // libraries and APIs for efficient high-order finite element and spectral
7 // element discretizations for exascale applications. For more information and
8 // source code availability see http://github.com/ceed.
9 //
10 // The CEED research is supported by the Exascale Computing Project 17-SC-20-SC,
11 // a collaborative effort of two U.S. Department of Energy organizations (Office
12 // of Science and the National Nuclear Security Administration) responsible for
13 // the planning and preparation of a capable exascale ecosystem, including
14 // software, applications, hardware, advanced system engineering and early
15 // testbed platforms, in support of the nation's exascale computing imperative.
16 
17 #include <string.h>
18 #include "ceed-backend.h"
19 #include "ceed-identity.h"
20 
21 /**
22   @brief Set fields identity QFunction that copies inputs directly into outputs
23 **/
24 static int CeedQFunctionInit_Identity(Ceed ceed, const char *requested,
25                                       CeedQFunction qf) {
26   int ierr;
27 
28   // Check QFunction name
29   const char *name = "Identity";
30   if (strcmp(name, requested))
31     // LCOV_EXCL_START
32     return CeedError(ceed, 1, "QFunction '%s' does not match requested name: %s",
33                      name, requested);
34   // LCOV_EXCL_STOP
35 
36   // Add QFunction fields
37   ierr = CeedQFunctionAddInput(qf, "input", 1, CEED_EVAL_INTERP); CeedChk(ierr);
38   ierr = CeedQFunctionAddOutput(qf, "output", 1, CEED_EVAL_INTERP);
39   CeedChk(ierr);
40 
41   return 0;
42 }
43 
44 /**
45   @brief Register identity QFunction that copies inputs directly into outputs
46 **/
47 __attribute__((constructor))
48 static void Register(void) {
49   CeedQFunctionRegister("Identity", Identity_loc, 1, Identity,
50                         CeedQFunctionInit_Identity);
51 }
52