From ef800d4ffafdbde7d7a172ad73bd984b1695c138 Mon Sep 17 00:00:00 2001 From: Pasha Date: Fri, 27 Jan 2023 00:54:07 +0000 Subject: simplex-glpk with modified glpk for fpga --- glpk-5.0/src/api/rdcc.c | 160 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 glpk-5.0/src/api/rdcc.c (limited to 'glpk-5.0/src/api/rdcc.c') diff --git a/glpk-5.0/src/api/rdcc.c b/glpk-5.0/src/api/rdcc.c new file mode 100644 index 0000000..1e93a77 --- /dev/null +++ b/glpk-5.0/src/api/rdcc.c @@ -0,0 +1,160 @@ +/* rdcc.c (read graph in DIMACS clique/coloring format) */ + +/*********************************************************************** +* This code is part of GLPK (GNU Linear Programming Kit). +* Copyright (C) 2009-2016 Free Software Foundation, Inc. +* Written by Andrew Makhorin . +* +* 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 . +***********************************************************************/ + +#include "dimacs.h" +#include "glpk.h" +#include "misc.h" + +#define error dmx_error +#define warning dmx_warning +#define read_char dmx_read_char +#define read_designator dmx_read_designator +#define read_field dmx_read_field +#define end_of_line dmx_end_of_line +#define check_int dmx_check_int + +/*********************************************************************** +* NAME +* +* glp_read_ccdata - read graph in DIMACS clique/coloring format +* +* SYNOPSIS +* +* int glp_read_ccdata(glp_graph *G, int v_wgt, const char *fname); +* +* DESCRIPTION +* +* The routine glp_read_ccdata reads an (undirected) graph in DIMACS +* clique/coloring format from a text file. +* +* RETURNS +* +* If the operation was successful, the routine returns zero. Otherwise +* it prints an error message and returns non-zero. */ + +int glp_read_ccdata(glp_graph *G, int v_wgt, const char *fname) +{ DMX _csa, *csa = &_csa; + glp_vertex *v; + int i, j, k, nv, ne, ret = 0; + double w; + char *flag = NULL; + if (v_wgt >= 0 && v_wgt > G->v_size - (int)sizeof(double)) + xerror("glp_read_ccdata: v_wgt = %d; invalid offset\n", + v_wgt); + glp_erase_graph(G, G->v_size, G->a_size); + if (setjmp(csa->jump)) + { ret = 1; + goto done; + } + csa->fname = fname; + csa->fp = NULL; + csa->count = 0; + csa->c = '\n'; + csa->field[0] = '\0'; + csa->empty = csa->nonint = 0; + xprintf("Reading graph from '%s'...\n", fname); + csa->fp = glp_open(fname, "r"); + if (csa->fp == NULL) + { xprintf("Unable to open '%s' - %s\n", fname, get_err_msg()); + longjmp(csa->jump, 1); + } + /* read problem line */ + read_designator(csa); + if (strcmp(csa->field, "p") != 0) + error(csa, "problem line missing or invalid"); + read_field(csa); + if (strcmp(csa->field, "edge") != 0) + error(csa, "wrong problem designator; 'edge' expected"); + read_field(csa); + if (!(str2int(csa->field, &nv) == 0 && nv >= 0)) + error(csa, "number of vertices missing or invalid"); + read_field(csa); + if (!(str2int(csa->field, &ne) == 0 && ne >= 0)) + error(csa, "number of edges missing or invalid"); + xprintf("Graph has %d vert%s and %d edge%s\n", + nv, nv == 1 ? "ex" : "ices", ne, ne == 1 ? "" : "s"); + if (nv > 0) glp_add_vertices(G, nv); + end_of_line(csa); + /* read node descriptor lines */ + flag = xcalloc(1+nv, sizeof(char)); + memset(&flag[1], 0, nv * sizeof(char)); + if (v_wgt >= 0) + { w = 1.0; + for (i = 1; i <= nv; i++) + { v = G->v[i]; + memcpy((char *)v->data + v_wgt, &w, sizeof(double)); + } + } + for (;;) + { read_designator(csa); + if (strcmp(csa->field, "n") != 0) break; + read_field(csa); + if (str2int(csa->field, &i) != 0) + error(csa, "vertex number missing or invalid"); + if (!(1 <= i && i <= nv)) + error(csa, "vertex number %d out of range", i); + if (flag[i]) + error(csa, "duplicate descriptor of vertex %d", i); + read_field(csa); + if (str2num(csa->field, &w) != 0) + error(csa, "vertex weight missing or invalid"); + check_int(csa, w); + if (v_wgt >= 0) + { v = G->v[i]; + memcpy((char *)v->data + v_wgt, &w, sizeof(double)); + } + flag[i] = 1; + end_of_line(csa); + } + xfree(flag), flag = NULL; + /* read edge descriptor lines */ + for (k = 1; k <= ne; k++) + { if (k > 1) read_designator(csa); + if (strcmp(csa->field, "e") != 0) + error(csa, "wrong line designator; 'e' expected"); + read_field(csa); + if (str2int(csa->field, &i) != 0) + error(csa, "first vertex number missing or invalid"); + if (!(1 <= i && i <= nv)) + error(csa, "first vertex number %d out of range", i); + read_field(csa); + if (str2int(csa->field, &j) != 0) + error(csa, "second vertex number missing or invalid"); + if (!(1 <= j && j <= nv)) + error(csa, "second vertex number %d out of range", j); + glp_add_arc(G, i, j); + end_of_line(csa); + } + xprintf("%d lines were read\n", csa->count); +done: if (ret) glp_erase_graph(G, G->v_size, G->a_size); + if (csa->fp != NULL) glp_close(csa->fp); + if (flag != NULL) xfree(flag); + return ret; +} + +/**********************************************************************/ + +int glp_read_graph(glp_graph *G, const char *fname) +{ return + glp_read_ccdata(G, -1, fname); +} + +/* eof */ -- cgit v1.2.1