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Diffstat (limited to 'test/monniaux/glpk-4.65/src/api/prob3.c')
| -rw-r--r-- | test/monniaux/glpk-4.65/src/api/prob3.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/test/monniaux/glpk-4.65/src/api/prob3.c b/test/monniaux/glpk-4.65/src/api/prob3.c new file mode 100644 index 00000000..d7edbd33 --- /dev/null +++ b/test/monniaux/glpk-4.65/src/api/prob3.c @@ -0,0 +1,166 @@ +/* prob3.c (problem row/column searching routines) */ + +/*********************************************************************** +* This code is part of GLPK (GNU Linear Programming Kit). +* +* Copyright (C) 2000-2013 Andrew Makhorin, Department for Applied +* Informatics, Moscow Aviation Institute, Moscow, Russia. All rights +* reserved. E-mail: <mao@gnu.org>. +* +* GLPK is free software: you can redistribute it and/or modify it +* under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* GLPK is distributed in the hope that it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public +* License for more details. +* +* You should have received a copy of the GNU General Public License +* along with GLPK. If not, see <http://www.gnu.org/licenses/>. +***********************************************************************/ + +#include "env.h" +#include "prob.h" + +/*********************************************************************** +* NAME +* +* glp_create_index - create the name index +* +* SYNOPSIS +* +* void glp_create_index(glp_prob *lp); +* +* DESCRIPTION +* +* The routine glp_create_index creates the name index for the +* specified problem object. The name index is an auxiliary data +* structure, which is intended to quickly (i.e. for logarithmic time) +* find rows and columns by their names. +* +* This routine can be called at any time. If the name index already +* exists, the routine does nothing. */ + +void glp_create_index(glp_prob *lp) +{ GLPROW *row; + GLPCOL *col; + int i, j; + /* create row name index */ + if (lp->r_tree == NULL) + { lp->r_tree = avl_create_tree(avl_strcmp, NULL); + for (i = 1; i <= lp->m; i++) + { row = lp->row[i]; + xassert(row->node == NULL); + if (row->name != NULL) + { row->node = avl_insert_node(lp->r_tree, row->name); + avl_set_node_link(row->node, row); + } + } + } + /* create column name index */ + if (lp->c_tree == NULL) + { lp->c_tree = avl_create_tree(avl_strcmp, NULL); + for (j = 1; j <= lp->n; j++) + { col = lp->col[j]; + xassert(col->node == NULL); + if (col->name != NULL) + { col->node = avl_insert_node(lp->c_tree, col->name); + avl_set_node_link(col->node, col); + } + } + } + return; +} + +/*********************************************************************** +* NAME +* +* glp_find_row - find row by its name +* +* SYNOPSIS +* +* int glp_find_row(glp_prob *lp, const char *name); +* +* RETURNS +* +* The routine glp_find_row returns the ordinal number of a row, +* which is assigned (by the routine glp_set_row_name) the specified +* symbolic name. If no such row exists, the routine returns 0. */ + +int glp_find_row(glp_prob *lp, const char *name) +{ AVLNODE *node; + int i = 0; + if (lp->r_tree == NULL) + xerror("glp_find_row: row name index does not exist\n"); + if (!(name == NULL || name[0] == '\0' || strlen(name) > 255)) + { node = avl_find_node(lp->r_tree, name); + if (node != NULL) + i = ((GLPROW *)avl_get_node_link(node))->i; + } + return i; +} + +/*********************************************************************** +* NAME +* +* glp_find_col - find column by its name +* +* SYNOPSIS +* +* int glp_find_col(glp_prob *lp, const char *name); +* +* RETURNS +* +* The routine glp_find_col returns the ordinal number of a column, +* which is assigned (by the routine glp_set_col_name) the specified +* symbolic name. If no such column exists, the routine returns 0. */ + +int glp_find_col(glp_prob *lp, const char *name) +{ AVLNODE *node; + int j = 0; + if (lp->c_tree == NULL) + xerror("glp_find_col: column name index does not exist\n"); + if (!(name == NULL || name[0] == '\0' || strlen(name) > 255)) + { node = avl_find_node(lp->c_tree, name); + if (node != NULL) + j = ((GLPCOL *)avl_get_node_link(node))->j; + } + return j; +} + +/*********************************************************************** +* NAME +* +* glp_delete_index - delete the name index +* +* SYNOPSIS +* +* void glp_delete_index(glp_prob *lp); +* +* DESCRIPTION +* +* The routine glp_delete_index deletes the name index previously +* created by the routine glp_create_index and frees the memory +* allocated to this auxiliary data structure. +* +* This routine can be called at any time. If the name index does not +* exist, the routine does nothing. */ + +void glp_delete_index(glp_prob *lp) +{ int i, j; + /* delete row name index */ + if (lp->r_tree != NULL) + { for (i = 1; i <= lp->m; i++) lp->row[i]->node = NULL; + avl_delete_tree(lp->r_tree), lp->r_tree = NULL; + } + /* delete column name index */ + if (lp->c_tree != NULL) + { for (j = 1; j <= lp->n; j++) lp->col[j]->node = NULL; + avl_delete_tree(lp->c_tree), lp->c_tree = NULL; + } + return; +} + +/* eof */ |