Changeset 565:7ab97e2a0c33 in lemon1.2 for lemon/glpk.cc
 Timestamp:
 04/01/09 22:54:00 (14 years ago)
 Branch:
 default
 Phase:
 public
 File:

 1 edited
Legend:
 Unmodified
 Added
 Removed

lemon/glpk.cc
r551 r565 534 534 : LpBase(), LpSolver(), GlpkBase() { 535 535 messageLevel(MESSAGE_NO_OUTPUT); 536 presolver(false); 536 537 } 537 538 … … 539 540 : LpBase(other), LpSolver(other), GlpkBase(other) { 540 541 messageLevel(MESSAGE_NO_OUTPUT); 542 presolver(false); 541 543 } 542 544 … … 575 577 break; 576 578 } 577 578 if (glp_simplex(lp, &smcp) != 0) return UNSOLVED; 579 smcp.presolve = _presolve; 580 581 // If the basis is not valid we get an error return value. 582 // In this case we can try to create a new basis. 583 switch (glp_simplex(lp, &smcp)) { 584 case 0: 585 break; 586 case GLP_EBADB: 587 case GLP_ESING: 588 case GLP_ECOND: 589 lpx_set_int_parm(lp, LPX_K_MSGLEV, smcp.msg_lev); 590 glp_adv_basis(lp, 0); 591 if (glp_simplex(lp, &smcp) != 0) return UNSOLVED; 592 break; 593 default: 594 return UNSOLVED; 595 } 596 579 597 return SOLVED; 580 598 } … … 601 619 } 602 620 smcp.meth = GLP_DUAL; 603 604 if (glp_simplex(lp, &smcp) != 0) return UNSOLVED; 621 smcp.presolve = _presolve; 622 623 // If the basis is not valid we get an error return value. 624 // In this case we can try to create a new basis. 625 switch (glp_simplex(lp, &smcp)) { 626 case 0: 627 break; 628 case GLP_EBADB: 629 case GLP_ESING: 630 case GLP_ECOND: 631 lpx_set_int_parm(lp, LPX_K_MSGLEV, smcp.msg_lev); 632 glp_adv_basis(lp, 0); 633 if (glp_simplex(lp, &smcp) != 0) return UNSOLVED; 634 break; 635 default: 636 return UNSOLVED; 637 } 605 638 return SOLVED; 606 639 } … … 820 853 } 821 854 822 void GlpkLp::presolver(bool b) {823 lpx_set_int_parm(lp, LPX_K_PRESOL, b ? 1 : 0);855 void GlpkLp::presolver(bool presolve) { 856 _presolve = presolve; 824 857 } 825 858 … … 882 915 smcp.meth = GLP_DUAL; 883 916 884 if (glp_simplex(lp, &smcp) != 0) return UNSOLVED; 917 // If the basis is not valid we get an error return value. 918 // In this case we can try to create a new basis. 919 switch (glp_simplex(lp, &smcp)) { 920 case 0: 921 break; 922 case GLP_EBADB: 923 case GLP_ESING: 924 case GLP_ECOND: 925 lpx_set_int_parm(lp, LPX_K_MSGLEV, smcp.msg_lev); 926 glp_adv_basis(lp, 0); 927 if (glp_simplex(lp, &smcp) != 0) return UNSOLVED; 928 break; 929 default: 930 return UNSOLVED; 931 } 932 885 933 if (glp_get_status(lp) != GLP_OPT) return SOLVED; 886 934
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