/* cplex.c (CPLEX-like interface to GLPK API) */
/***********************************************************************
* This code is part of GLPK (GNU Linear Programming Kit).
*
* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
* 2009, 2010 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 <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <glpk.h>
#include "cplex.h"
struct CPXENV
{ /* environment block */
CPXLP *list;
/* linked list of problem objects */
int *intparam; /* int intparam[]; */
/* integer control parameters */
double *dblparam; /* double dblparam[]; */
/* floating-point control parameters */
};
struct CPXLP
{ /* problem object */
CPXENV *env;
/* pointer to environment block */
glp_prob *prob;
/* pointer to underlying GLPK problem object */
int rflen;
/* length of the array rflag */
char *rflag; /* char rflag[rflen]; */
/* rflag[i], i = 0,...,nrows-1, is a flag of i-th row: */
#define RF_NOT_RANGED 0 /* not ranged */
#define RF_RANGED_POS 1 /* ranged, RHS = lower bound */
#define RF_RANGED_NEG 2 /* ranged, RHS = upper bound */
int stat;
/* solution status reported by CPXgetstat; zero means no solution
exists */
int meth;
/* method indicator reported by CPXgetmethod */
int iwlen;
/* length of the working array */
int *iwork; /* int iwork[iwlen] */
/* working array initialized by binary zeros */
CPXLP *link;
/* pointer to another problem object */
};
struct intparam
{ int which;
int defv;
int minv;
int maxv;
};
struct dblparam
{ int which;
double defv;
double minv;
double maxv;
};
struct errstring
{ int code;
const char *string;
};
#define BIGINT 2100000000
#define BIGDBL 1e75
static const struct intparam intparam[] =
{ {CPX_PARAM_ADVIND, 0, 0, 2},
{CPX_PARAM_AGGIND, -1, -1, BIGINT},
{CPX_PARAM_DATACHECK, CPX_OFF, CPX_OFF, CPX_ON},
{CPX_PARAM_DPRIIND, CPX_DPRIIND_AUTO, CPX_DPRIIND_AUTO,
CPX_DPRIIND_DEVEX},
{CPX_PARAM_FASTMIP, CPX_OFF, CPX_OFF, CPX_ON}, /* ??? */
{CPX_PARAM_ITLIM, BIGINT, 0, BIGINT},
{CPX_PARAM_PERIND, CPX_OFF, CPX_OFF, CPX_ON},
{CPX_PARAM_PPRIIND, CPX_PPRIIND_AUTO, CPX_PPRIIND_PARTIAL,
CPX_PPRIIND_FULL},
{CPX_PARAM_PREIND, CPX_ON, CPX_OFF, CPX_ON},
{CPX_PARAM_REINV, 0, 0, 10000},
{CPX_PARAM_SCRIND, CPX_OFF, CPX_OFF, CPX_ON},
{CPX_PARAM_SIMDISPLAY, 1, 0, 2},
};
static const struct dblparam dblparam[] =
{ {CPX_PARAM_EPOPT, 1e-6, 1e-9, 1e-1},
{CPX_PARAM_EPPER, 1e-6, 1e-8, BIGDBL},
{CPX_PARAM_EPRHS, 1e-6, 1e-9, 1e-1},
{CPX_PARAM_OBJLLIM, -BIGDBL, -BIGDBL, +BIGDBL},
{CPX_PARAM_OBJULIM, +BIGDBL, -BIGDBL, +BIGDBL},
};
static const struct errstring errstring[] =
{ {CPXERR_ARRAY_NOT_ASCENDING, "Array entry %d not ascending"},
{CPXERR_BAD_ARGUMENT, "Invalid argument"},
{CPXERR_BAD_CTYPE, "Invalid ctype entry %d"},
{CPXERR_BAD_FILETYPE, "Invalid filetype"},
{CPXERR_BAD_LUB, "Invalid bound change indicator entry %d"},
{CPXERR_BAD_PARAM_NUM, "Invalid parameter number"},
{CPXERR_BAD_SENSE, "Invalid sense entry %d"},
{CPXERR_BAD_STATUS, "Invalid status entry %d for basis specificat"
"ion"},
{CPXERR_COL_INDEX_RANGE, "Column index %d out of range"},
{CPXERR_COUNT_RANGE, "Count entry %d negative or larger than allo"
"wed"},
{CPXERR_DUP_ENTRY, "Duplicate entry"},
{CPXERR_FAIL_OPEN_WRITE, "Could not open file '%s' for writing"},
{CPXERR_INDEX_RANGE, "Index is outside range of valid values"},
{CPXERR_NEGATIVE_SURPLUS, "Insufficient array length"},
{CPXERR_NO_BASIC_SOLN, "No basic solution exists"},
{CPXERR_NO_ENVIRONMENT, "No environment exists"},
{CPXERR_NO_FILENAME, "File name not specified"},
{CPXERR_NO_MEMORY, "Out of memory"},
{CPXERR_NO_PROBLEM, "No problem exists"},
{CPXERR_NO_SOLN, "No solution exists"},
{CPXERR_NOT_FIXED, "Only fixed variables are pivoted out"},
{CPXERR_NULL_NAME, "Null pointer %d in name array"},
{CPXERR_NULL_POINTER, "Null pointer for required data"},
{CPXERR_PARAM_TOO_BIG, "Parameter value too big"},
{CPXERR_PARAM_TOO_SMALL, "Parameter value too small"},
{CPXERR_ROW_INDEX_RANGE, "Row index %d out of range"},
};
/**********************************************************************/
#define xassert glp_assert
#define xprintf glp_printf
#define xmalloc glp_malloc
#define xcalloc glp_calloc
#define xfree glp_free
/**********************************************************************/
static int findintparam(int whichparam)
{ int k, card;
card = sizeof(intparam) / sizeof(struct intparam);
for (k = 0; k < card; k++)
if (intparam[k].which == whichparam) return k;
return -1;
}
static int getintparam(CPXENV *env, int whichparam)
{ int k;
xassert(env != NULL);
k = findintparam(whichparam);
xassert(k >= 0);
return env->intparam[k];
}
static int finddblparam(int whichparam)
{ int k, card;
card = sizeof(dblparam) / sizeof(struct dblparam);
for (k = 0; k < card; k++)
if (dblparam[k].which == whichparam) return k;
return -1;
}
static double getdblparam(CPXENV *env, int whichparam)
{ int k;
xassert(env != NULL);
k = finddblparam(whichparam);
xassert(k >= 0);
return env->dblparam[k];
}
static const char *finderrstring(int errcode)
{ int k, card;
card = sizeof(errstring) / sizeof(struct errstring);
for (k = 0; k < card; k++)
{ if (errstring[k].code == errcode)
return errstring[k].string;
}
return NULL;
}
static int error(CPXENV *env, int errcode, ...)
{ va_list arg;
char buffer[510];
xassert(env != NULL);
if (getintparam(env, CPX_PARAM_SCRIND) == CPX_ON)
{ xassert(CPXgeterrorstring(env, errcode, buffer) == buffer);
va_start(arg, errcode);
vprintf(buffer, arg);
va_end(arg);
}
return errcode;
}
static int checkenv(CPXENV *env)
{ int errcode;
if (env == NULL)
errcode = CPXERR_NO_ENVIRONMENT;
else
errcode = 0;
return errcode;
}
static checklp(CPXENV *env, CPXLP *lp)
{ int errcode;
errcode = checkenv(env);
if (errcode) goto done;
if (lp == NULL)
errcode = error(env, CPXERR_NO_PROBLEM);
done: return errcode;
}
static void invalidate(CPXLP *lp)
{ lp->stat = 0;
lp->meth = CPX_ALG_NONE;
return;
}
static void enlargerflag(CPXLP *lp)
{ int m;
xassert(lp != NULL);
m = glp_get_num_rows(lp->prob);
if (lp->rflen < m)
{ int rflen = lp->rflen;
char *rflag = lp->rflag;
while (lp->rflen < m)
{ lp->rflen += lp->rflen;
xassert(lp->rflen > 0);
}
lp->rflag = xcalloc(lp->rflen, sizeof(char));
memcpy(lp->rflag, rflag, rflen);
xfree(rflag);
}
return;
}
static void enlargeiwork(CPXLP *lp, int len)
{ xassert(len >= 0);
if (lp->iwlen < len)
{ xfree(lp->iwork);
while (lp->iwlen < len)
{ lp->iwlen += lp->iwlen;
xassert(lp->iwlen > 0);
}
lp->iwork = xcalloc(lp->iwlen, sizeof(int));
memset(lp->iwork, 0, lp->iwlen * sizeof(int));
}
return;
}
/**********************************************************************/
int CPXaddcols(CPXENV *env, CPXLP *lp, int ccnt, int nzcnt,
const double obj[], const int cmatbeg[], const int cmatind[],
const double cmatval[], const double lb[], const double ub[],
char *colname[])
{ int j, k, m, n, beg, end, type, errcode;
double lbnd, ubnd;
errcode = checklp(env, lp);
if (errcode) goto done;
if (ccnt < 0 || nzcnt < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (ccnt > 0)
{ if (cmatbeg == NULL || cmatind == NULL || cmatval == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
}
m = glp_get_num_rows(lp->prob);
n = glp_get_num_cols(lp->prob);
enlargeiwork(lp, m);
for (j = 0; j < ccnt; j++)
{ beg = cmatbeg[j];
if (j > 0 && !(cmatbeg[j-1] <= beg))
{ errcode = error(env, CPXERR_ARRAY_NOT_ASCENDING, j);
goto done;
}
if (!(0 <= beg && beg <= nzcnt))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
end = (j < ccnt-1 ? cmatbeg[j+1] : nzcnt);
for (k = beg; k < end; k++)
{ if (!(0 <= cmatind[k] && cmatind[k] < m))
{ errcode = error(env, CPXERR_ROW_INDEX_RANGE, k);
goto done;
}
}
errcode = 0;
for (k = beg; k < end; k++)
{ if (lp->iwork[cmatind[k]])
{ errcode = error(env, CPXERR_DUP_ENTRY);
break;
}
lp->iwork[cmatind[k]] = 1;
}
for (k = beg; k < end; k++)
lp->iwork[cmatind[k]] = 0;
if (errcode) goto done;
if (colname != NULL)
{ if (colname[j] == NULL)
{ errcode = error(env, CPXERR_NULL_NAME, j);
goto done;
}
}
}
errcode = 0;
invalidate(lp);
if (ccnt > 0)
glp_add_cols(lp->prob, ccnt);
for (j = 0; j < ccnt; j++)
{ if (colname != NULL)
glp_set_col_name(lp->prob, n+j+1, colname[j]);
lbnd = (lb == NULL ? 0.0 : lb[j]);
ubnd = (ub == NULL ? +CPX_INFBOUND : ub[j]);
if (lbnd <= -CPX_INFBOUND && ubnd >= +CPX_INFBOUND)
type = GLP_FR;
else if (ubnd >= +CPX_INFBOUND)
type = GLP_LO;
else if (lbnd <= -CPX_INFBOUND)
type = GLP_UP;
else if (lbnd != ubnd)
type = GLP_DB;
else
type = GLP_FX;
glp_set_col_bnds(lp->prob, n+j+1, type, lbnd, ubnd);
if (obj != NULL)
glp_set_obj_coef(lp->prob, n+j+1, obj[j]);
beg = cmatbeg[j];
end = (j < ccnt-1 ? cmatbeg[j+1] : nzcnt);
for (k = beg; k < end; k++)
lp->iwork[k-beg] = cmatind[k]+1;
glp_set_mat_col(lp->prob, n+j+1, end-beg, lp->iwork-1,
cmatval+beg-1);
for (k = beg; k < end; k++)
lp->iwork[k-beg] = 0;
}
done: return errcode;
}
int CPXaddrows(CPXENV *env, CPXLP *lp, int ccnt, int rcnt, int nzcnt,
const double rhs[], const char sense[], const int rmatbeg[],
const int rmatind[], const double rmatval[], char *colname[],
char *rowname[])
{ int i, j, k, m, n, beg, end, type, errcode;
double temp;
errcode = checklp(env, lp);
if (errcode) goto done;
if (ccnt < 0 || rcnt < 0 || nzcnt < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (rcnt > 0)
{ if (rmatbeg == NULL || rmatind == NULL || rmatval == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
}
m = glp_get_num_rows(lp->prob);
n = glp_get_num_cols(lp->prob);
enlargeiwork(lp, n+ccnt);
for (i = 0; i < rcnt; i++)
{ if (sense != NULL)
{ if (!(sense[i] == 'L' || sense[i] == 'E' ||
sense[i] == 'G' || sense[i] == 'R'))
{ errcode = error(env, CPXERR_BAD_SENSE, i);
goto done;
}
}
beg = rmatbeg[i];
if (i > 0 && !(rmatbeg[i-1] <= beg))
{ errcode = error(env, CPXERR_ARRAY_NOT_ASCENDING, i);
goto done;
}
if (!(0 <= beg && beg <= nzcnt))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
end = (i < rcnt-1 ? rmatbeg[i+1] : nzcnt);
for (k = beg; k < end; k++)
{ if (!(0 <= rmatind[k] && rmatind[k] < n+ccnt))
{ errcode = error(env, CPXERR_COL_INDEX_RANGE, k);
goto done;
}
}
errcode = 0;
for (k = beg; k < end; k++)
{ if (lp->iwork[rmatind[k]])
{ errcode = error(env, CPXERR_DUP_ENTRY);
break;
}
lp->iwork[rmatind[k]] = 1;
}
for (k = beg; k < end; k++)
lp->iwork[rmatind[k]] = 0;
if (errcode) goto done;
if (rowname != NULL)
{ if (rowname[i] == NULL)
{ errcode = error(env, CPXERR_NULL_NAME, i);
goto done;
}
}
}
for (j = 0; j < ccnt; j++)
{ if (colname != NULL)
{ if (colname[j] == NULL)
{ errcode = error(env, CPXERR_NULL_NAME, j);
goto done;
}
}
}
errcode = 0;
invalidate(lp);
if (rcnt > 0)
glp_add_rows(lp->prob, rcnt);
if (ccnt > 0)
glp_add_cols(lp->prob, ccnt);
enlargerflag(lp);
for (i = 0; i < rcnt; i++)
{ if (rowname != NULL)
glp_set_row_name(lp->prob, m+i+1, rowname[i]);
temp = (rhs == NULL ? 0.0 : rhs[i]);
if (sense == NULL || sense[i] == 'E')
{ lp->rflag[m+i] = RF_NOT_RANGED;
type = GLP_FX;
}
else if (sense[i] == 'L')
{ lp->rflag[m+i] = RF_NOT_RANGED;
type = GLP_UP;
}
else if (sense[i] == 'G')
{ lp->rflag[m+i] = RF_NOT_RANGED;
type = GLP_LO;
}
else if (sense[i] == 'R')
{ lp->rflag[m+i] = RF_RANGED_POS;
type = GLP_FX;
}
else
xassert(sense != sense);
glp_set_row_bnds(lp->prob, m+i+1, type, temp, temp);
beg = rmatbeg[i];
end = (i < rcnt-1 ? rmatbeg[i+1] : nzcnt);
for (k = beg; k < end; k++)
lp->iwork[k-beg] = rmatind[k]+1;
glp_set_mat_row(lp->prob, m+i+1, end-beg, lp->iwork-1,
rmatval+beg-1);
for (k = beg; k < end; k++)
lp->iwork[k-beg] = 0;
}
for (j = 0; j < ccnt; j++)
{ if (colname != NULL)
glp_set_col_name(lp->prob, n+j+1, colname[j]);
glp_set_col_bnds(lp->prob, n+j+1, GLP_LO, 0.0, 0.0);
}
done: return errcode;
}
int CPXbaropt(CPXENV *env, CPXLP *lp)
{ xassert(env == env);
xassert(lp == lp);
xprintf("CPXbaropt: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXbinvrow(CPXENV *env, CPXLP *lp, int i, double y[])
{ xassert(env == env);
xassert(lp == lp);
xassert(i == i);
xassert(y == y);
xprintf("CPXbinvrow: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXchgbds(CPXENV *env, CPXLP *lp, int cnt, const int indices[],
const char lu[], const double bd[])
{ int j, n, type, errcode;
double lbnd, ubnd;
errcode = checklp(env, lp);
if (errcode) goto done;
if (cnt < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (cnt > 0)
{ if (indices == NULL || lu == NULL || bd == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
}
n = glp_get_num_cols(lp->prob);
for (j = 0; j < cnt; j++)
{ if (!(0 <= indices[j] && indices[j] < n))
{ errcode = error(env, CPXERR_COL_INDEX_RANGE, j);
goto done;
}
if (!(lu[j] == 'L' || lu[j] == 'U' || lu[j] == 'B'))
{ errcode = error(env, CPXERR_BAD_LUB, j);
goto done;
}
}
errcode = 0;
invalidate(lp);
for (j = 0; j < cnt; j++)
{ type = glp_get_col_type(lp->prob, indices[j]+1);
lbnd = glp_get_col_lb(lp->prob, indices[j]+1);
ubnd = glp_get_col_ub(lp->prob, indices[j]+1);
if (type == GLP_FR || type == GLP_UP)
lbnd = -CPX_INFBOUND;
if (type == GLP_FR || type == GLP_LO)
ubnd = +CPX_INFBOUND;
if (lu[j] == 'L')
lbnd = bd[j];
else if (lu[j] == 'U')
ubnd = bd[j];
else if (lu[j] == 'B')
lbnd = ubnd = bd[j];
else
xassert(lu != lu);
if (lbnd <= -CPX_INFBOUND && ubnd >= +CPX_INFBOUND)
type = GLP_FR;
else if (ubnd >= +CPX_INFBOUND)
type = GLP_LO;
else if (lbnd <= -CPX_INFBOUND)
type = GLP_UP;
else if (lbnd != ubnd)
type = GLP_DB;
else
type = GLP_FX;
glp_set_col_bnds(lp->prob, indices[j]+1, type, lbnd, ubnd);
}
done: return errcode;
}
int CPXchgcoeflist(CPXENV *env, CPXLP *lp, int numcoefs,
const int rowlist[], const int collist[], const double vallist[])
{ int i, j, k, m, n, rcnt, ccnt, len, ptr, errcode;
int *head, *next, *ind;
double *val;
errcode = checklp(env, lp);
if (errcode) goto done;
if (numcoefs < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (numcoefs == 0)
{ errcode = 0;
goto done;
}
if (rowlist == NULL || collist == NULL || vallist == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
/* check triplets and determine the number of rows and columns
to be changed */
m = glp_get_num_rows(lp->prob);
n = glp_get_num_cols(lp->prob);
enlargeiwork(lp, m);
enlargeiwork(lp, n);
rcnt = ccnt = 0;
for (k = 0; k < numcoefs; k++)
{ i = rowlist[k];
if (!(0 <= i && i < m))
{ errcode = error(env, CPXERR_ROW_INDEX_RANGE, i);
goto done;
}
if (!(lp->iwork[i] & 0x01))
rcnt++, lp->iwork[i] |= 0x01;
j = collist[k];
if (!(0 <= j && j < n))
{ errcode = error(env, CPXERR_COL_INDEX_RANGE, j);
goto done;
}
if (!(lp->iwork[j] & 0x02))
ccnt++, lp->iwork[j] |= 0x02;
}
memset(lp->iwork, 0, m * sizeof(int));
memset(lp->iwork, 0, n * sizeof(int));
errcode = 0;
invalidate(lp);
if (rcnt <= ccnt)
{ /* change the matrix by rows */
/* build the linked list of triplets:
head[i] is a pointer to first triplet for row i
next[k] is a pointer to next triplet for the same row */
head = xcalloc(m, sizeof(int));
for (i = 0; i < m; i++)
head[i] = -1;
next = xcalloc(numcoefs, sizeof(int));
for (k = 0; k < numcoefs; k++)
{ i = rowlist[k];
next[k] = head[i];
head[i] = k;
}
/* check duplicate columns */
for (i = 0; i < m; i++)
{ for (k = head[i]; k >= 0; k = next[k])
{ j = collist[k];
if (lp->iwork[j])
{ xfree(head);
xfree(next);
errcode = error(env, CPXERR_DUP_ENTRY);
goto done;
}
lp->iwork[j] = 1;
}
for (k = head[i]; k >= 0; k = next[k])
lp->iwork[collist[k]] = 0;
}
/* perform operation */
ind = xcalloc(1+n, sizeof(int));
val = xcalloc(1+n, sizeof(double));
for (i = 0; i < m; i++)
{ if (head[i] < 0) continue;
len = glp_get_mat_row(lp->prob, i+1, ind, val);
for (ptr = 1; ptr <= len; ptr++)
{ j = ind[ptr]-1;
xassert(lp->iwork[j] == 0);
lp->iwork[j] = ptr;
}
for (k = head[i]; k >= 0; k = next[k])
{ j = collist[k];
if (lp->iwork[j] == 0)
lp->iwork[j] = ++len;
ptr = lp->iwork[j];
ind[ptr] = j+1, val[ptr] = vallist[k];
}
glp_set_mat_row(lp->prob, i+1, len, ind, val);
for (ptr = 1; ptr <= len; ptr++)
lp->iwork[ind[ptr]-1] = 0;
}
}
else
{ /* change the matrix by columns */
/* build the linked lists of triplets:
head[j] is a pointer to first triplet for column j
next[k] is a pointer to next triplet for the same column */
head = xcalloc(n, sizeof(int));
for (j = 0; j < n; j++)
head[j] = -1;
next = xcalloc(numcoefs, sizeof(int));
for (k = 0; k < numcoefs; k++)
{ j = collist[k];
next[k] = head[j];
head[j] = k;
}
/* check duplicate rows */
for (j = 0; j < n; j++)
{ for (k = head[j]; k >= 0; k = next[k])
{ i = rowlist[k];
if (lp->iwork[i])
{ xfree(head);
xfree(next);
errcode = error(env, CPXERR_DUP_ENTRY);
goto done;
}
lp->iwork[i] = 1;
}
for (k = head[j]; k >= 0; k = next[k])
lp->iwork[rowlist[k]] = 0;
}
/* perform operation */
ind = xcalloc(1+m, sizeof(int));
val = xcalloc(1+m, sizeof(double));
for (j = 0; j < n; j++)
{ if (head[j] < 0) continue;
len = glp_get_mat_col(lp->prob, j+1, ind, val);
for (ptr = 1; ptr <= len; ptr++)
{ i = ind[ptr]-1;
xassert(lp->iwork[i] == 0);
lp->iwork[i] = ptr;
}
for (k = head[j]; k >= 0; k = next[k])
{ i = rowlist[k];
if (lp->iwork[i] == 0)
lp->iwork[i] = ++len;
ptr = lp->iwork[i];
ind[ptr] = i+1, val[ptr] = vallist[k];
}
glp_set_mat_col(lp->prob, j+1, len, ind, val);
for (ptr = 1; ptr <= len; ptr++)
lp->iwork[ind[ptr]-1] = 0;
}
}
xfree(head);
xfree(next);
xfree(ind);
xfree(val);
done: return errcode;
}
void CPXchgobjsen(CPXENV *env, CPXLP *lp, int maxormin)
{ int errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
if (!(maxormin == CPX_MIN || maxormin == CPX_MAX))
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
errcode = 0;
invalidate(lp);
if (maxormin == CPX_MIN)
glp_set_obj_dir(lp->prob, GLP_MIN);
else
glp_set_obj_dir(lp->prob, GLP_MAX);
done: xassert(errcode == errcode);
return;
}
int CPXchgsense(CPXENV *env, CPXLP *lp, int cnt, const int indices[],
const char sense[])
{ int i, m, type, errcode;
double rhs;
errcode = checklp(env, lp);
if (errcode) goto done;
if (cnt < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (cnt > 0 && (indices == NULL || sense == NULL))
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
m = glp_get_num_rows(lp->prob);
for (i = 0; i < cnt; i++)
{ if (!(0 <= indices[i] && indices[i] < m))
{ errcode = error(env, CPXERR_ROW_INDEX_RANGE, i);
goto done;
}
if (!(sense[i] == 'L' || sense[i] == 'E' || sense[i] == 'G' ||
sense[i] == 'R'))
{ errcode = error(env, CPXERR_BAD_SENSE, i);
goto done;
}
}
errcode = 0;
invalidate(lp);
for (i = 0; i < cnt; i++)
{ type = glp_get_row_type(lp->prob, indices[i]+1);
if (lp->rflag[indices[i]] == RF_NOT_RANGED)
{ if (type == GLP_LO || type == GLP_FX)
rhs = glp_get_row_lb(lp->prob, indices[i]+1);
else if (type == GLP_UP)
rhs = glp_get_row_ub(lp->prob, indices[i]+1);
else
xassert(type != type);
}
else if (lp->rflag[indices[i]] == RF_RANGED_POS)
{ xassert(type == GLP_DB || type == GLP_FX);
rhs = glp_get_row_lb(lp->prob, indices[i]+1);
}
else if (lp->rflag[indices[i]] == RF_RANGED_NEG)
{ xassert(type == GLP_DB);
rhs = glp_get_row_ub(lp->prob, indices[i]+1);
}
else
xassert(lp != lp);
if (sense[i] == 'L')
{ lp->rflag[indices[i]] = RF_NOT_RANGED;
type = GLP_UP;
}
else if (sense[i] == 'E')
{ lp->rflag[indices[i]] = RF_NOT_RANGED;
type = GLP_FX;
}
else if (sense[i] == 'G')
{ lp->rflag[indices[i]] = RF_NOT_RANGED;
type = GLP_LO;
}
else if (sense[i] == 'R')
{ lp->rflag[indices[i]] = RF_RANGED_POS;
type = GLP_FX;
}
else
xassert(sense != sense);
glp_set_row_bnds(lp->prob, indices[i]+1, type, rhs, rhs);
}
done: return errcode;
}
int CPXcloseCPLEX(CPXENV **_env)
{ CPXENV *env;
CPXLP *lp;
int errcode;
if (_env == NULL)
{ errcode = CPXERR_NULL_POINTER;
goto done;
}
env = *_env;
errcode = checkenv(env);
if (errcode) goto done;
while (env->list != NULL)
{ lp = env->list;
errcode = CPXfreeprob(env, &lp);
xassert(!errcode);
}
xfree(env->intparam);
xfree(env->dblparam);
xfree(env);
*_env = NULL;
errcode = 0;
done: return errcode;
}
int CPXcopybase(CPXENV *env, CPXLP *lp, const int cstat[],
const int rstat[])
{ int i, j, m, n, stat, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
m = glp_get_num_rows(lp->prob);
n = glp_get_num_cols(lp->prob);
if (m > 0 && rstat == NULL || n > 0 && cstat == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
for (i = 0; i < m; i++)
{ if (!(rstat[i] == CPX_AT_LOWER || rstat[i] == CPX_BASIC ||
rstat[i] == CPX_AT_UPPER))
{ errcode = error(env, CPXERR_BAD_STATUS, i);
goto done;
}
}
for (j = 0; j < n; j++)
{ if (!(cstat[j] == CPX_AT_LOWER || cstat[j] == CPX_BASIC ||
cstat[j] == CPX_AT_UPPER || cstat[j] == CPX_FREE_SUPER))
{ errcode = error(env, CPXERR_BAD_STATUS, j);
goto done;
}
}
errcode = 0;
invalidate(lp);
for (i = 0; i < m; i++)
{ if (rstat[i] == CPX_AT_LOWER)
stat = GLP_NL;
else if (rstat[i] == CPX_BASIC)
stat = GLP_BS;
else if (rstat[i] == CPX_AT_UPPER)
stat = GLP_NU;
else
xassert(rstat != rstat);
glp_set_row_stat(lp->prob, i+1, stat);
}
for (j = 0; j < n; j++)
{ if (cstat[j] == CPX_AT_LOWER)
stat = GLP_NL;
else if (cstat[j] == CPX_BASIC)
stat = GLP_BS;
else if (cstat[j] == CPX_AT_UPPER)
stat = GLP_NU;
else if (cstat[j] == CPX_FREE_SUPER)
stat = GLP_NF;
else
xassert(cstat != cstat);
glp_set_col_stat(lp->prob, j+1, stat);
}
done: return errcode;
}
int CPXcopybasednorms(CPXENV *env, CPXLP *lp, const int cstat[],
const int rstat[], const double dnorm[])
{ int errcode;
errcode = CPXcopybase(env, lp, cstat, rstat);
xassert(dnorm == dnorm);
return errcode;
}
int CPXcopylp(CPXENV *env, CPXLP *lp, int numcols, int numrows,
int objsen, const double obj[], const double rhs[],
const char sense[], const int matbeg[], const int matcnt[],
const int matind[], const double matval[], const double lb[],
const double ub[], const double rngval[])
{ int errcode;
errcode = CPXcopylpwnames(env, lp, numcols, numrows, objsen, obj,
rhs, sense, matbeg, matcnt, matind, matval, lb, ub, rngval,
NULL, NULL);
return errcode;
}
int CPXcopylpwnames(CPXENV *env, CPXLP *lp, int numcols, int numrows,
int objsen, const double obj[], const double rhs[],
const char sense[], const int matbeg[], const int matcnt[],
const int matind[], const double matval[], const double lb[],
const double ub[], const double rngval[], char *colname[],
char *rowname[])
{ int i, j, k, beg, end, type, errcode;
double lbnd, ubnd;
char name[255+1];
errcode = checklp(env, lp);
if (errcode) goto done;
if (numcols < 0 || numrows < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (!(objsen == CPX_MIN || objsen == CPX_MAX))
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (numcols > 0)
{ if (matbeg == NULL || matcnt == NULL || matind == NULL ||
matval == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
}
for (i = 0; i < numrows; i++)
{ if (sense != NULL)
{ if (!(sense[i] == 'L' || sense[i] == 'E' ||
sense[i] == 'G' || sense[i] == 'R'))
{ errcode = error(env, CPXERR_BAD_SENSE, i);
goto done;
}
}
if (rowname != NULL)
{ if (rowname[i] == NULL)
{ errcode = error(env, CPXERR_NULL_NAME, i);
goto done;
}
}
}
enlargeiwork(lp, numrows);
for (j = 0; j < numcols; j++)
{ beg = matbeg[j];
if (j > 0 && !(matbeg[j-1] <= beg))
{ errcode = error(env, CPXERR_ARRAY_NOT_ASCENDING, j);
goto done;
}
if (beg < 0)
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
end = beg + matcnt[j];
if (!(beg <= end) || j < numcols-1 && !(end <= matbeg[j+1]))
{ errcode = error(env, CPXERR_COUNT_RANGE, j);
goto done;
}
for (k = beg; k < end; k++)
{ if (!(0 <= matind[k] && matind[k] < numrows))
{ errcode = error(env, CPXERR_ROW_INDEX_RANGE, k);
goto done;
}
}
errcode = 0;
for (k = beg; k < end; k++)
{ if (lp->iwork[matind[k]])
{ errcode = error(env, CPXERR_DUP_ENTRY);
break;
}
lp->iwork[matind[k]] = 1;
}
for (k = beg; k < end; k++)
lp->iwork[matind[k]] = 0;
if (errcode) goto done;
if (colname != NULL)
{ if (colname[j] != NULL)
{ errcode = error(env, CPXERR_NULL_NAME, j);
goto done;
}
}
}
errcode = 0;
invalidate(lp);
if (glp_get_prob_name(lp->prob) == NULL)
name[0] = '\0';
else
strcpy(name, glp_get_prob_name(lp->prob));
glp_erase_prob(lp->prob);
glp_set_prob_name(lp->prob, name);
if (objsen == CPX_MIN)
glp_set_obj_dir(lp->prob, GLP_MIN);
else if (objsen == CPX_MAX)
glp_set_obj_dir(lp->prob, GLP_MAX);
else
xassert(objsen != objsen);
if (numrows > 0)
glp_add_rows(lp->prob, numrows);
enlargerflag(lp);
for (i = 0; i < numrows; i++)
{ if (rowname != NULL)
glp_set_row_name(lp->prob, i+1, rowname[i]);
lbnd = ubnd = (rhs == NULL ? 0.0 : rhs[i]);
if (sense == NULL || sense[i] == 'E')
{ lp->rflag[i] = RF_NOT_RANGED;
type = GLP_FX;
}
else if (sense[i] == 'L')
{ lp->rflag[i] = RF_NOT_RANGED;
type = GLP_UP;
}
else if (sense[i] == 'G')
{ lp->rflag[i] = RF_NOT_RANGED;
type = GLP_LO;
}
else if (sense[i] == 'R')
{ if (rngval == NULL || rngval[i] == 0.0)
{ lp->rflag[i] = RF_RANGED_POS;
type = GLP_FX;
}
else if (rngval[i] > 0.0)
{ lp->rflag[i] = RF_RANGED_POS;
type = GLP_DB;
ubnd += rngval[i];
}
else /* rngval[i] < 0.0 */
{ lp->rflag[i] = RF_RANGED_NEG;
type = GLP_DB;
lbnd += rngval[i];
}
}
else
xassert(sense != sense);
glp_set_row_bnds(lp->prob, i+1, type, lbnd, ubnd);
}
if (numcols > 0)
glp_add_cols(lp->prob, numcols);
for (j = 0; j < numcols; j++)
{ if (colname != NULL)
glp_set_col_name(lp->prob, j+1, colname[j]);
lbnd = (lb == NULL ? 0.0 : lb[j]);
ubnd = (ub == NULL ? +CPX_INFBOUND : ub[j]);
if (lbnd <= -CPX_INFBOUND && ubnd >= +CPX_INFBOUND)
type = GLP_FR;
else if (ubnd >= +CPX_INFBOUND)
type = GLP_LO;
else if (lbnd <= -CPX_INFBOUND)
type = GLP_UP;
else if (lbnd != ubnd)
type = GLP_DB;
else
type = GLP_FX;
glp_set_col_bnds(lp->prob, j+1, type, lbnd, ubnd);
if (obj != NULL)
glp_set_obj_coef(lp->prob, j+1, obj[j]);
beg = matbeg[j];
end = beg + matcnt[j];
for (k = beg; k < end; k++)
lp->iwork[k-beg] = matind[k]+1;
glp_set_mat_col(lp->prob, j+1, end-beg, lp->iwork-1,
matval+beg-1);
for (k = beg; k < end; k++)
lp->iwork[k-beg] = 0;
}
done: return errcode;
}
CPXLP *CPXcreateprob(CPXENV *env, int *status, const char *probname)
{ CPXLP *lp = NULL;
int errcode;
errcode = checkenv(env);
if (errcode) goto done;
lp = xmalloc(sizeof(struct CPXLP));
lp->env = env;
lp->prob = glp_create_prob();
glp_set_prob_name(lp->prob, probname);
lp->rflen = 100;
lp->rflag = xcalloc(lp->rflen, sizeof(char));
lp->iwlen = 100;
lp->iwork = xcalloc(lp->iwlen, sizeof(int));
memset(lp->iwork, 0, lp->iwlen * sizeof(int));
lp->link = env->list;
env->list = lp;
invalidate(lp);
done: if (status != NULL) *status = errcode;
return lp;
}
int CPXdelcols(CPXENV *env, CPXLP *lp, int begin, int end)
{ int j, n, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
n = glp_get_num_cols(lp->prob);
if (!(0 <= begin && begin <= end && end < n))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
errcode = 0;
invalidate(lp);
enlargeiwork(lp, end-begin+1);
for (j = begin; j <= end; j++)
lp->iwork[j-begin] = j+1;
glp_del_cols(lp->prob, end-begin+1, lp->iwork-1);
for (j = begin; j <= end; j++)
lp->iwork[j-begin] = 0;
done: return errcode;
}
int CPXdelrows(CPXENV *env, CPXLP *lp, int begin, int end)
{ int i, m, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
m = glp_get_num_rows(lp->prob);
if (!(0 <= begin && begin <= end && end < m))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
errcode = 0;
invalidate(lp);
enlargeiwork(lp, end-begin+1);
for (i = begin; i <= end; i++)
lp->iwork[i-begin] = i+1;
glp_del_rows(lp->prob, end-begin+1, lp->iwork-1);
for (i = begin; i <= end; i++)
lp->iwork[i-begin] = 0;
for (i = end+1; i < m; i++)
lp->rflag[i-(end-begin+1)] = lp->rflag[i];
done: return errcode;
}
int CPXdelsetcols(CPXENV *env, CPXLP *lp, int delstat[])
{ xassert(env == env);
xassert(lp == lp);
xassert(delstat == delstat);
xprintf("CPXdelsetcols: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXdelsetrows(CPXENV *env, CPXLP *lp, int delstat[])
{ int i, m, cnt, ind, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
m = glp_get_num_rows(lp->prob);
if (m > 0 && delstat == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
errcode = 0;
invalidate(lp);
enlargeiwork(lp, m);
cnt = ind = 0;
for (i = 0; i < m; i++)
{ if (delstat[i] == 1)
{ delstat[i] = -1;
lp->iwork[cnt++] = i+1;
}
else
{ delstat[i] = ind;
lp->rflag[ind++] = lp->rflag[i];
}
}
if (cnt > 0)
glp_del_rows(lp->prob, cnt, lp->iwork-1);
for (i = 0; i < cnt; i++)
lp->iwork[i] = 0;
done: return errcode;
}
int CPXdualopt(CPXENV *env, CPXLP *lp);
int CPXfreeprob(CPXENV *env, CPXLP **_lp)
{ CPXLP *lp;
int errcode;
errcode = checkenv(env);
if (errcode) goto done;
if (_lp == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
lp = *_lp;
errcode = checklp(env, lp);
if (errcode) goto done;
errcode = 0;
env = lp->env;
if (env->list == lp)
env->list = lp->link;
else
{ CPXLP *pp;
for (pp = env->list; pp != NULL; pp = pp->link)
if (pp->link == lp) break;
xassert(pp != NULL);
pp->link = lp->link;
}
glp_delete_prob(lp->prob);
xfree(lp->rflag);
xfree(lp->iwork);
xfree(lp);
*_lp = NULL;
done: return errcode;
}
int CPXgetbase(CPXENV *env, CPXLP *lp, int cstat[], int rstat[])
{ int i, j, m, n, stat, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
if (!lp->stat)
{ errcode = error(env, CPXERR_NO_SOLN);
goto done;
}
if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
;
else
{ errcode = error(env, CPXERR_NO_BASIC_SOLN);
goto done;
}
errcode = 0;
if (rstat != NULL)
{ m = glp_get_num_rows(lp->prob);
for (i = 0; i < m; i++)
{ stat = glp_get_row_stat(lp->prob, i+1);
if (stat == GLP_BS)
rstat[i] = CPX_BASIC;
else if (lp->rflag[i] == RF_NOT_RANGED || stat != GLP_NU)
rstat[i] = CPX_AT_LOWER;
else
rstat[i] = CPX_AT_UPPER;
}
}
if (cstat != NULL)
{ n = glp_get_num_cols(lp->prob);
for (j = 0; j < n; j++)
{ stat = glp_get_col_stat(lp->prob, j+1);
if (stat == GLP_BS)
cstat[j] = CPX_BASIC;
else if (stat == GLP_NU)
cstat[j] = CPX_AT_UPPER;
else if (stat == GLP_NF)
cstat[j] = CPX_FREE_SUPER;
else
cstat[j] = CPX_AT_LOWER;
}
}
done: return errcode;
}
int CPXgetbasednorms(CPXENV *env, CPXLP *lp, int cstat[], int rstat[],
double dnorm[])
{ int i, m, errcode;
errcode = CPXgetbase(env, lp, cstat, rstat);
if (errcode) goto done;
if (dnorm != NULL)
{ m = glp_get_num_rows(lp->prob);
for (i = 0; i < m; i++) dnorm[i] = 1.0;
}
done: return errcode;
}
int CPXgetbhead(CPXENV *env, CPXLP *lp, int head[], double x[])
{ xassert(env == env);
xassert(lp == lp);
xassert(head == head);
xassert(x == x);
xprintf("CPXgetbhead: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXgetdblparam(CPXENV *env, int whichparam, double *value)
{ int k, errcode;
errcode = checkenv(env);
if (errcode) goto done;
k = finddblparam(whichparam);
if (k < 0)
{ errcode = error(env, CPXERR_BAD_PARAM_NUM);
goto done;
}
errcode = 0;
if (value != NULL)
*value = env->dblparam[k];
done: return errcode;
}
int CPXgetdj(CPXENV *env, CPXLP *lp, double dj[], int begin, int end)
{ int j, n, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
n = glp_get_num_cols(lp->prob);
if (!(0 <= begin && begin <= end && end < n))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
if (!lp->stat)
{ errcode = error(env, CPXERR_NO_SOLN);
goto done;
}
errcode = 0;
if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
{ if (dj != NULL)
{ for (j = begin; j <= end; j++)
dj[j-begin] = glp_get_col_dual(lp->prob, j+1);
}
}
else
xassert(lp != lp);
done: return errcode;
}
char *CPXgeterrorstring(CPXENV *env, int errcode, char *buffer)
{ const char *string;
xassert(env == env);
string = finderrstring(errcode);
if (string == NULL)
buffer = NULL;
else
sprintf(buffer, "CPLEX Error %5d: %s.\n", errcode, string);
return buffer;
}
int CPXgetijdiv(CPXENV *env, CPXLP *lp, int *idiv, int *jdiv)
{ xassert(env == env);
xassert(lp == lp);
xassert(idiv == idiv);
xassert(jdiv == jdiv);
xprintf("CPXgetijdiv: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXgetintparam(CPXENV *env, int whichparam, int *value)
{ int k, errcode;
errcode = checkenv(env);
if (errcode) goto done;
k = findintparam(whichparam);
if (k < 0)
{ errcode = error(env, CPXERR_BAD_PARAM_NUM);
goto done;
}
errcode = 0;
if (value != NULL)
*value = env->intparam[k];
done: return errcode;
}
int CPXgetlb(CPXENV *env, CPXLP *lp, double lb[], int begin, int end)
{ xassert(env == env);
xassert(lp == lp);
xassert(lb == lb);
xassert(begin == begin);
xassert(end == end);
xprintf("CPXgetlb: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXgetmethod(CPXENV *env, CPXLP *lp)
{ int method;
if (checklp(env, lp))
method = CPX_ALG_NONE;
else
method = lp->meth;
return method;
}
int CPXgetnumcols(CPXENV *env, CPXLP *lp)
{ int numcols;
if (checklp(env, lp))
numcols = 0;
else
numcols = glp_get_num_cols(lp->prob);
return numcols;
}
int CPXgetnumnz(CPXENV *env, CPXLP *lp)
{ int numnz;
if (checklp(env, lp))
numnz = 0;
else
numnz = glp_get_num_nz(lp->prob);
return numnz;
}
int CPXgetnumrows(CPXENV *env, CPXLP *lp)
{ int numrows;
if (checklp(env, lp))
numrows = 0;
else
numrows = glp_get_num_rows(lp->prob);
return numrows;
}
int CPXgetobjval(CPXENV *env, CPXLP *lp, double *objval)
{ int errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
if (!lp->stat)
{ errcode = error(env, CPXERR_NO_SOLN);
goto done;
}
errcode = 0;
if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
{ if (objval != NULL)
*objval = glp_get_obj_val(lp->prob);
}
else
xassert(lp != lp);
done: return errcode;
}
int CPXgetpi(CPXENV *env, CPXLP *lp, double pi[], int begin, int end)
{ int i, m, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
m = glp_get_num_rows(lp->prob);
if (!(0 <= begin && begin <= end && end < m))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
if (!lp->stat)
{ errcode = error(env, CPXERR_NO_SOLN);
goto done;
}
errcode = 0;
if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
{ if (pi != NULL)
{ for (i = begin; i <= end; i++)
pi[i-begin] = glp_get_row_dual(lp->prob, i+1);
}
}
else
xassert(lp != lp);
done: return errcode;
}
int CPXgetsense(CPXENV *env, CPXLP *lp, char sense[], int begin,
int end)
{ xassert(env == env);
xassert(lp == lp);
xassert(sense == sense);
xassert(begin == begin);
xassert(end == end);
xprintf("CPXgetsense: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXgetslack(CPXENV *env, CPXLP *lp, double slack[], int begin,
int end)
{ int i, m, type, errcode;
double temp;
errcode = checklp(env, lp);
if (errcode) goto done;
m = glp_get_num_rows(lp->prob);
if (!(0 <= begin && begin <= end && end < m))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
if (!lp->stat)
{ errcode = error(env, CPXERR_NO_SOLN);
goto done;
}
errcode = 0;
if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
{ if (slack != NULL)
{ for (i = begin; i <= end; i++)
{ type = glp_get_row_type(lp->prob, i+1);
temp = glp_get_row_prim(lp->prob, i+1);
if (lp->rflag[i] == RF_NOT_RANGED)
{ if (type == GLP_LO || type == GLP_FX)
slack[i-begin] =
glp_get_row_lb(lp->prob, i+1) - temp;
else if (type == GLP_UP)
slack[i-begin] =
glp_get_row_ub(lp->prob, i+1) - temp;
else
xassert(type != type);
}
else if (lp->rflag[i] == RF_RANGED_POS)
{ xassert(type == GLP_DB || type == GLP_FX);
slack[i-begin] =
temp - glp_get_row_lb(lp->prob, i+1);
}
else if (lp->rflag[i] == RF_RANGED_NEG)
{ xassert(type == GLP_DB);
slack[i-begin] =
temp - glp_get_row_ub(lp->prob, i+1);
}
else
xassert(lp != lp);
}
}
}
else
xassert(lp != lp);
done: return errcode;
}
int CPXgetstat(CPXENV *env, CPXLP *lp)
{ int stat;
if (checklp(env, lp))
stat = 0;
else
stat = lp->stat;
return stat;
}
int CPXgetub(CPXENV *env, CPXLP *lp, double ub[], int begin, int end)
{ xassert(env == env);
xassert(lp == lp);
xassert(ub == ub);
xassert(begin == begin);
xassert(end == end);
xprintf("CPXgetub: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXgetweight(CPXENV *env, CPXLP *lp, int rcnt, const int rmatbeg[],
const int rmatind[], const double rmatval[], double weight[],
int dpriind)
{ xassert(env == env);
xassert(lp == lp);
xassert(rcnt == rcnt);
xassert(rmatbeg == rmatbeg);
xassert(rmatind == rmatind);
xassert(rmatval == rmatval);
xassert(weight == weight);
xassert(dpriind == dpriind);
xprintf("CPXgetweight: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXgetx(CPXENV *env, CPXLP *lp, double x[], int begin, int end)
{ int j, n, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
n = glp_get_num_cols(lp->prob);
if (!(0 <= begin && begin <= end && end < n))
{ errcode = error(env, CPXERR_INDEX_RANGE);
goto done;
}
if (!lp->stat)
{ errcode = error(env, CPXERR_NO_SOLN);
goto done;
}
errcode = 0;
if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
{ if (x != NULL)
{ for (j = begin; j <= end; j++)
x[j-begin] = glp_get_col_prim(lp->prob, j+1);
}
}
else
xassert(lp != lp);
done: return errcode;
}
int CPXinfodblparam(CPXENV *env, int whichparam, double *defvalue,
double *minvalue, double *maxvalue)
{ int k, errcode;
errcode = checkenv(env);
if (errcode) goto done;
k = finddblparam(whichparam);
if (k < 0)
{ errcode = error(env, CPXERR_BAD_PARAM_NUM);
goto done;
}
errcode = 0;
if (defvalue != NULL)
*defvalue = dblparam[k].defv;
if (minvalue != NULL)
*minvalue = dblparam[k].minv;
if (maxvalue != NULL)
*maxvalue = dblparam[k].maxv;
done: return errcode;
}
int CPXinfointparam(CPXENV *env, int whichparam, int *defvalue,
int *minvalue, int *maxvalue)
{ int k, errcode;
errcode = checkenv(env);
if (errcode) goto done;
k = findintparam(whichparam);
if (k < 0)
{ errcode = error(env, CPXERR_BAD_PARAM_NUM);
goto done;
}
errcode = 0;
if (defvalue != NULL)
*defvalue = intparam[k].defv;
if (minvalue != NULL)
*minvalue = intparam[k].minv;
if (maxvalue != NULL)
*maxvalue = intparam[k].maxv;
done: return errcode;
}
int CPXmdleave(const CPXENV *env, CPXLP *lp, const int goodlist[],
int goodlen, double downratio[], double upratio[])
{ int k;
xassert(env == env);
xassert(lp == lp);
xassert(goodlist == goodlist);
xassert(goodlen >= 0);
xassert(downratio != NULL);
xassert(upratio != NULL);
/* not implemented yet */
for (k = 0; k < goodlen; k++)
downratio[k] = upratio[k] = 0.0;
return 0;
}
int CPXnewcols(CPXENV *env, CPXLP *lp, int ccnt, const double obj[],
const double lb[], const double ub[], const char ctype[],
char *colname[])
{ int j, n, kind, type, errcode;
double lbnd, ubnd;
errcode = checklp(env, lp);
if (errcode) goto done;
if (ccnt < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
for (j = 0; j < ccnt; j++)
{ if (ctype != NULL)
{ if (!(ctype[j] == 'C' || ctype[j] == 'B' ||
ctype[j] == 'I'))
{ errcode = error(env, CPXERR_BAD_CTYPE, j);
goto done;
}
}
if (colname != NULL)
{ if (colname[j] == NULL)
{ errcode = error(env, CPXERR_NULL_NAME, j);
goto done;
}
}
}
errcode = 0;
invalidate(lp);
n = glp_get_num_cols(lp->prob);
if (ccnt > 0)
glp_add_cols(lp->prob, ccnt);
for (j = 0; j < ccnt; j++)
{ if (colname != NULL)
glp_set_col_name(lp->prob, n+j+1, colname[j]);
if (obj != NULL)
glp_set_obj_coef(lp->prob, n+j+1, obj[j]);
lbnd = (lb == NULL ? 0.0 : lb[j]);
ubnd = (ub == NULL ? 0.0 : ub[j]);
if (lbnd <= -CPX_INFBOUND && ubnd >= +CPX_INFBOUND)
type = GLP_FR;
else if (ubnd >= +CPX_INFBOUND)
type = GLP_LO;
else if (lbnd <= -CPX_INFBOUND)
type = GLP_UP;
else if (lbnd != ubnd)
type = GLP_DB;
else
type = GLP_FX;
glp_set_col_bnds(lp->prob, n+j+1, type, lbnd, ubnd);
if (ctype != NULL)
{ if (ctype[j] == 'C')
kind = GLP_CV;
else if (ctype[j] == 'B')
kind = GLP_BV;
else if (ctype[j] == 'I')
kind = GLP_IV;
else
xassert(ctype != ctype);
glp_set_col_kind(lp->prob, n+j+1, kind);
}
}
done: return errcode;
}
int CPXnewrows(CPXENV *env, CPXLP *lp, int rcnt, const double rhs[],
const char sense[], const double rngval[], char *rowname[])
{ int i, m, type, errcode;
double lbnd, ubnd;
errcode = checklp(env, lp);
if (errcode) goto done;
if (rcnt < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
for (i = 0; i < rcnt; i++)
{ if (sense != NULL)
{ if (!(sense[i] == 'L' || sense[i] == 'E' ||
sense[i] == 'G' || sense[i] == 'R'))
{ errcode = error(env, CPXERR_BAD_SENSE, i);
goto done;
}
}
if (rowname != NULL)
{ if (rowname[i] == NULL)
{ errcode = error(env, CPXERR_NULL_NAME, i);
goto done;
}
}
}
errcode = 0;
invalidate(lp);
m = glp_get_num_rows(lp->prob);
if (rcnt > 0)
glp_add_rows(lp->prob, rcnt);
enlargerflag(lp);
for (i = 0; i < rcnt; i++)
{ if (rowname != NULL)
glp_set_row_name(lp->prob, m+i+1, rowname[i]);
lbnd = ubnd = (rhs == NULL ? 0.0 : rhs[i]);
if (sense == NULL || sense[i] == 'E')
{ lp->rflag[m+i] = RF_NOT_RANGED;
type = GLP_FX;
}
else if (sense[i] == 'L')
{ lp->rflag[m+i] = RF_NOT_RANGED;
type = GLP_UP;
}
else if (sense[i] == 'G')
{ lp->rflag[m+i] = RF_NOT_RANGED;
type = GLP_LO;
}
else if (sense[i] == 'R')
{ if (rngval == NULL || rngval[i] == 0.0)
{ lp->rflag[m+i] = RF_RANGED_POS;
type = GLP_FX;
}
else if (rngval[i] > 0.0)
{ lp->rflag[m+i] = RF_RANGED_POS;
type = GLP_DB;
ubnd += rngval[i];
}
else /* rngval[i] < 0.0 */
{ lp->rflag[m+i] = RF_RANGED_NEG;
type = GLP_DB;
lbnd += rngval[i];
}
}
else
xassert(sense != sense);
glp_set_row_bnds(lp->prob, m+i+1, type, lbnd, ubnd);
}
done: return errcode;
}
CPXENV *CPXopenCPLEX(int *status)
{ CPXENV *env;
int k, card;
env = xmalloc(sizeof(CPXENV));
env->list = NULL;
card = sizeof(intparam) / sizeof(struct intparam);
env->intparam = xcalloc(card, sizeof(int));
for (k = 0; k < card; k++)
env->intparam[k] = intparam[k].defv;
card = sizeof(dblparam) / sizeof(struct dblparam);
env->dblparam = xcalloc(card, sizeof(double));
for (k = 0; k < card; k++)
env->dblparam[k] = dblparam[k].defv;
if (status != NULL) *status = 0;
return env;
}
int CPXpivotin(CPXENV *env, CPXLP *lp, const int rlist[], int rlen)
{ int i, m, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
if (rlen < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (rlen > 0 && rlist == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
m = glp_get_num_rows(lp->prob);
for (i = 0; i < rlen; i++)
{ if (!(0 <= rlist[i] && rlist[i] < m))
{ errcode = error(env, CPXERR_ROW_INDEX_RANGE, i);
goto done;
}
}
errcode = 0;
for (i = 0; i < rlen; i++)
{ if (glp_get_row_type(lp->prob, rlist[i]+1) != GLP_FX)
{ if (glp_get_row_stat(lp->prob, rlist[i]+1) != GLP_BS)
{ /* not implemented yet */
break;
}
}
}
done: return errcode;
}
int CPXpivotout(CPXENV *env, CPXLP *lp, const int clist[], int clen)
{ int j, n, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
if (clen < 0)
{ errcode = error(env, CPXERR_BAD_ARGUMENT);
goto done;
}
if (clen > 0 && clist == NULL)
{ errcode = error(env, CPXERR_NULL_POINTER);
goto done;
}
n = glp_get_num_cols(lp->prob);
for (j = 0; j < clen; j++)
{ if (!(0 <= clist[j] && clist[j] < n))
{ errcode = error(env, CPXERR_COL_INDEX_RANGE, j);
goto done;
}
if (glp_get_col_type(lp->prob, clist[j]+1) != GLP_FX)
{ errcode = error(env, CPXERR_NOT_FIXED);
goto done;
}
}
errcode = 0;
for (j = 0; j < clen; j++)
{ if (glp_get_col_stat(lp->prob, clist[j]+1) == GLP_BS)
{ /* not implemented yet */
break;
}
}
done: return errcode;
}
int CPXprimopt(CPXENV *env, CPXLP *lp);
int CPXsavwrite(CPXENV *env, CPXLP *lp, const char *filename)
{ xassert(env == env);
xassert(lp == lp);
xassert(filename == filename);
xprintf("CPXsavwrite: not implemented yet\n");
exit(EXIT_FAILURE);
return -1;
}
int CPXsetdblparam(CPXENV *env, int whichparam, double newvalue)
{ int k, errcode;
errcode = checkenv(env);
if (errcode) goto done;
k = finddblparam(whichparam);
if (k < 0)
{ errcode = error(env, CPXERR_BAD_PARAM_NUM);
goto done;
}
if (newvalue < dblparam[k].minv)
{ errcode = error(env, CPXERR_PARAM_TOO_SMALL);
goto done;
}
if (newvalue > dblparam[k].maxv)
{ errcode = error(env, CPXERR_PARAM_TOO_BIG);
goto done;
}
errcode = 0;
env->dblparam[k] = newvalue;
done: return errcode;
}
int CPXsetintparam(CPXENV *env, int whichparam, int newvalue)
{ int k, errcode;
errcode = checkenv(env);
if (errcode) goto done;
k = findintparam(whichparam);
if (k < 0)
{ errcode = error(env, CPXERR_BAD_PARAM_NUM);
goto done;
}
if (newvalue < intparam[k].minv)
{ errcode = error(env, CPXERR_PARAM_TOO_SMALL);
goto done;
}
if (newvalue > intparam[k].maxv)
{ errcode = error(env, CPXERR_PARAM_TOO_BIG);
goto done;
}
errcode = 0;
env->intparam[k] = newvalue;
done: return errcode;
}
int CPXsolninfo(CPXENV *env, CPXLP *lp, int *solnmethod, int *solntype,
int *pfeasind, int *dfeasind)
{ int type, pfeas, dfeas, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
errcode = 0;
if (!lp->stat)
type = CPX_NO_SOLN, pfeas = dfeas = 0;
else if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
{ type = CPX_BASIC_SOLN;
pfeas = (glp_get_prim_stat(lp->prob) == GLP_FEAS);
dfeas = (glp_get_dual_stat(lp->prob) == GLP_FEAS);
}
else
xassert(lp != lp);
if (solnmethod != NULL)
*solnmethod = lp->meth;
if (solntype != NULL)
*solntype = type;
if (pfeasind != NULL)
*pfeasind = pfeas;
if (dfeasind != NULL)
*dfeasind = dfeas;
done: return errcode;
}
int CPXsolution(CPXENV *env, CPXLP *lp, int *lpstat, double *objval,
double x[], double pi[], double slack[], double dj[])
{ int m, n, errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
if (!lp->stat)
{ errcode = error(env, CPXERR_NO_SOLN);
goto done;
}
errcode = 0;
m = glp_get_num_rows(lp->prob);
n = glp_get_num_cols(lp->prob);
if (lp->meth == CPX_ALG_PRIMAL || lp->meth == CPX_ALG_DUAL)
{ if (lpstat != NULL)
*lpstat = CPXgetstat(env, lp);
if (objval != NULL)
xassert(CPXgetobjval(env, lp, objval) == 0);
if (x != NULL)
xassert(CPXgetx(env, lp, x, 0, n-1) == 0);
if (pi != NULL)
xassert(CPXgetpi(env, lp, pi, 0, m-1) == 0);
if (slack != NULL)
xassert(CPXgetslack(env, lp, slack, 0, m-1) == 0);
if (dj != NULL)
xassert(CPXgetdj(env, lp, dj, 0, n-1) == 0);
}
else
xassert(lp != lp);
done: return errcode;
}
int CPXstrongbranch(CPXENV *env, CPXLP *lp, const int goodlist[],
int goodlen, double downpen[], double uppen[], int itlim)
{ int k;
xassert(env == env);
xassert(lp == lp);
xassert(goodlist == goodlist);
xassert(goodlen >= 0);
xassert(downpen != NULL);
xassert(uppen != NULL);
xassert(itlim == itlim);
/* not implemented yet */
for (k = 0; k < goodlen; k++)
downpen[k] = uppen[k] = 0.0;
return 0;
}
static int xstrcasecmp(const char *s1, const char *s2)
{ int c1, c2;
for (;;)
{ c1 = toupper((unsigned char)*s1++);
c2 = toupper((unsigned char)*s2++);
if (c1 == '\0' || c1 != c2) break;
}
return c1 - c2;
}
static void getfiletype(const char *filename, char type[3+1])
{ /* determine filetype from filename */
int beg, end;
beg = end = strlen(filename);
while (beg > 0 && filename[beg-1] != '.' && end - beg < 3)
beg--;
if (beg > 0 && filename[beg-1] == '.' &&
xstrcasecmp(&filename[beg], "gz") == 0)
{ end = --beg;
while (beg > 0 && filename[beg-1] != '.' && end - beg < 3)
beg--;
}
if (beg > 0 && filename[beg-1] == '.')
{ memcpy(type, &filename[beg], end - beg);
type[end - beg] = '\0';
}
else
type[0] = '\0';
return;
}
int CPXwriteprob(CPXENV *env, CPXLP *lp, const char *filename,
const char *filetype)
{ glp_prob *copy;
int errcode;
char type[3+1];
errcode = checklp(env, lp);
if (errcode) goto done;
if (filename == NULL)
{ errcode = error(env, CPXERR_NO_FILENAME);
goto done;
}
if (filetype == NULL)
getfiletype(filename, type), filetype = type;
if (xstrcasecmp(filetype, "MPS") == 0)
{ glp_term_out(GLP_OFF);
errcode = glp_write_mps(lp->prob, GLP_MPS_FILE, NULL, filename)
;
glp_term_out(GLP_ON);
}
else if (xstrcasecmp(filetype, "LP") == 0)
{ glp_term_out(GLP_OFF);
errcode = glp_write_lp(lp->prob, NULL, filename);
glp_term_out(GLP_ON);
}
else if (xstrcasecmp(filetype, "RMP") == 0 ||
xstrcasecmp(filetype, "REW") == 0)
{ copy = glp_create_prob();
glp_copy_prob(copy, lp->prob, GLP_OFF);
glp_term_out(GLP_OFF);
errcode = glp_write_mps(copy, GLP_MPS_DECK, NULL, filename);
glp_term_out(GLP_ON);
glp_delete_prob(copy);
}
else if (xstrcasecmp(filetype, "RLP") == 0)
{ copy = glp_create_prob();
glp_copy_prob(copy, lp->prob, GLP_OFF);
glp_term_out(GLP_OFF);
errcode = glp_write_lp(copy, NULL, filename);
glp_term_out(GLP_ON);
glp_delete_prob(copy);
}
else
{ errcode = error(env, CPXERR_BAD_FILETYPE);
goto done;
}
if (errcode)
errcode = error(env, CPXERR_FAIL_OPEN_WRITE, filename);
done: return errcode;
}
/**********************************************************************/
static int solvelp(CPXENV *env, CPXLP *lp, int meth)
{ glp_smcp parm;
int errcode;
errcode = checklp(env, lp);
if (errcode) goto done;
errcode = 0;
invalidate(lp);
glp_init_smcp(&parm);
switch (meth)
{ case CPX_ALG_PRIMAL:
parm.meth = GLP_PRIMAL;
break;
case CPX_ALG_DUAL:
parm.meth = GLP_DUAL;
break;
default:
xassert(meth != meth);
}
switch (getintparam(env, CPX_PARAM_SIMDISPLAY))
{ case 0:
parm.msg_lev = GLP_MSG_OFF;
break;
case 1:
parm.msg_lev = GLP_MSG_ALL;
break;
case 2:
parm.msg_lev = GLP_MSG_ALL;
parm.out_frq = 1;
break;
default:
xassert(env != env);
}
xassert(getdblparam == getdblparam);
switch (getintparam(env, CPX_PARAM_ADVIND))
{ case 0:
glp_term_out(GLP_OFF);
glp_adv_basis(lp->prob, 0);
glp_term_out(GLP_ON);
break;
case 1:
case 2:
break;
default:
xassert(env != env);
}
if (!glp_bf_exists(lp->prob))
{ if (glp_factorize(lp->prob) != 0)
{ glp_term_out(GLP_OFF);
glp_adv_basis(lp->prob, 0);
glp_term_out(GLP_ON);
if (glp_factorize(lp->prob) != 0)
glp_std_basis(lp->prob);
}
}
xassert(glp_simplex(lp->prob, &parm) == 0);
switch (glp_get_status(lp->prob))
{ case GLP_OPT:
lp->stat = CPX_STAT_OPTIMAL;
lp->meth = meth;
break;
case GLP_NOFEAS:
lp->stat = CPX_STAT_INFEASIBLE;
lp->meth = meth;
break;
case GLP_UNBND:
lp->stat = CPX_STAT_UNBOUNDED;
lp->meth = meth;
break;
default:
xassert(lp != lp);
}
done: return errcode;
}
int CPXprimopt(CPXENV *env, CPXLP *lp)
{ int errcode;
errcode = solvelp(env, lp, CPX_ALG_PRIMAL);
return errcode;
}
int CPXdualopt(CPXENV *env, CPXLP *lp)
{ int errcode;
errcode = solvelp(env, lp, CPX_ALG_DUAL);
return errcode;
}
int CPXlpopt(CPXENV *env, CPXLP *lp)
{ int errcode;
errcode = solvelp(env, lp, CPX_ALG_PRIMAL);
return errcode;
}
/* eof */
distrib
>
Fedora
>
13
>
i386
>
media
>
os
>
by-pkgid
>
f1e2bc5e1a8a784323c2a7a37d36f441
>
files
>
48
