1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 2 /* */ 3 /* This file is part of the program and library */ 4 /* SCIP --- Solving Constraint Integer Programs */ 5 /* */ 6 /* Copyright (c) 2002-2023 Zuse Institute Berlin (ZIB) */ 7 /* */ 8 /* Licensed under the Apache License, Version 2.0 (the "License"); */ 9 /* you may not use this file except in compliance with the License. */ 10 /* You may obtain a copy of the License at */ 11 /* */ 12 /* http://www.apache.org/licenses/LICENSE-2.0 */ 13 /* */ 14 /* Unless required by applicable law or agreed to in writing, software */ 15 /* distributed under the License is distributed on an "AS IS" BASIS, */ 16 /* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */ 17 /* See the License for the specific language governing permissions and */ 18 /* limitations under the License. */ 19 /* */ 20 /* You should have received a copy of the Apache-2.0 license */ 21 /* along with SCIP; see the file LICENSE. If not visit scipopt.org. */ 22 /* */ 23 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ 24 25 /**@file compute_symmetry_none.cpp 26 * @brief interface for no symmetry computations 27 * @author Marc Pfetsch 28 */ 29 30 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 31 32 #include "compute_symmetry.h" 33 34 /** return whether symmetry can be computed */ 35 SCIP_Bool SYMcanComputeSymmetry(void) 36 { 37 return FALSE; 38 } 39 40 /** return name of external program used to compute generators */ 41 const char* SYMsymmetryGetName(void) 42 { 43 return "none"; 44 } 45 46 /** return description of external program used to compute generators */ 47 const char* SYMsymmetryGetDesc(void) 48 { 49 return ""; 50 } 51 52 /** return name of additional external program used for computing symmetries */ 53 const char* SYMsymmetryGetAddName(void) 54 { 55 return ""; 56 } 57 58 /** return description of additional external program used to compute symmetries */ 59 const char* SYMsymmetryGetAddDesc(void) 60 { 61 return ""; 62 } 63 64 /** compute generators of symmetry group */ /*lint -e{715}*/ 65 SCIP_RETCODE SYMcomputeSymmetryGenerators( 66 SCIP* scip, /**< SCIP pointer */ 67 int maxgenerators, /**< maximal number of generators constructed (= 0 if unlimited) */ 68 SYM_GRAPH* graph, /**< symmetry detection graph */ 69 int* nperms, /**< pointer to store number of permutations */ 70 int* nmaxperms, /**< pointer to store maximal number of permutations (needed for freeing storage) */ 71 int*** perms, /**< pointer to store permutation generators as (nperms x npermvars) matrix */ 72 SCIP_Real* log10groupsize, /**< pointer to store size of group */ 73 SCIP_Real* symcodetime /**< pointer to store the time for symmetry code */ 74 ) 75 { /*lint --e{715}*/ 76 assert( scip != NULL ); 77 assert( graph != NULL ); 78 assert( nperms != NULL ); 79 assert( nmaxperms != NULL ); 80 assert( perms != NULL ); 81 assert( log10groupsize != NULL ); 82 assert( symcodetime != NULL ); 83 84 /* init */ 85 *nperms = 0; 86 *nmaxperms = 0; 87 *perms = NULL; 88 *log10groupsize = 0; 89 *symcodetime = 0.0; 90 91 return SCIP_OKAY; 92 } 93 94 /** returns whether two given graphs are identical */ 95 SCIP_Bool SYMcheckGraphsAreIdentical( 96 SCIP* scip, /**< SCIP pointer */ 97 SYM_SYMTYPE symtype, /**< type of symmetries to be checked */ 98 SYM_GRAPH* G1, /**< first graph */ 99 SYM_GRAPH* G2 /**< second graph */ 100 ) 101 { 102 return FALSE; 103 } 104