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f-qpsol.cc
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1996-09-28
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// f-qpsol.cc -*- C++ -*-
/*
Copyright (C) 1993, 1994, 1995 John W. Eaton
This file is part of Octave.
Octave 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 2, or (at your option) any
later version.
Octave 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 Octave; see the file COPYING. If not, write to the Free
Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <strstream.h>
#include "QPSOL.h"
#include "tree-const.h"
#include "variables.h"
#include "gripes.h"
#include "error.h"
#include "utils.h"
#include "pager.h"
#include "help.h"
#include "defun-dld.h"
#ifndef QPSOL_MISSING
// This should probably be defined in some shared file and declared in
// a header file...
extern int linear_constraints_ok (const ColumnVector& x,
const ColumnVector& llb, const Matrix& c,
const ColumnVector& lub, char *warn_for,
int warn);
static QPSOL_options qpsol_opts;
#endif
#if defined (QPSOL_MISSING)
DEFUN_DLD_BUILTIN ("qpsol", Fqpsol, Sqpsol, 9, 3,
"This function requires QPSOL, which is not freely\n\
redistributable. For more information, read the file\n\
libcruft/qpsol/README.MISSING in the source distribution.")
#else
DEFUN_DLD_BUILTIN ("qpsol", Fqpsol, Sqpsol, 9, 3,
"[X, OBJ, INFO, LAMBDA] = qpsol (X, H, C [, LB, UB] [, LB, A, UB])\n\
\n\
Groups of arguments surrounded in `[]' are optional, but\n\
must appear in the same relative order shown above.")
#endif
{
/*
Handle all of the following:
1. qpsol (x, H, c)
2. qpsol (x, H, c, lb, ub)
3. qpsol (x, H, c, lb, ub, llb, A, lub)
4. qpsol (x, H, c, llb, A, lub)
*/
Octave_object retval;
#if defined (QPSOL_MISSING)
// Force a bad value of inform, and empty matrices for x, phi, and lambda.
retval.resize (4, Matrix ());
retval(2) = -1.0;
print_usage ("qpsol");
#else
int nargin = args.length ();
if (nargin < 3 || nargin == 4 || nargin == 7 || nargin > 8
|| nargout > 4)
{
print_usage ("qpsol");
return retval;
}
ColumnVector x = args(0).vector_value ();
if (error_state || x.capacity () == 0)
{
error ("qpsol: expecting vector as first argument");
return retval;
}
Matrix H = args(1).matrix_value ();
if (error_state || H.rows () != H.columns () || H.rows () != x.capacity ())
{
error ("qpsol: H must be a square matrix consistent with the size of x");
return retval;
}
ColumnVector c = args(2).vector_value ();
if (error_state || c.capacity () != x.capacity ())
{
error ("qpsol: c must be a vector the same size as x");
return retval;
}
Bounds bounds;
if (nargin == 5 || nargin == 8)
{
ColumnVector lb = args(3).vector_value ();
ColumnVector ub = args(4).vector_value ();
int lb_len = lb.capacity ();
int ub_len = ub.capacity ();
if (error_state || lb_len != ub_len || lb_len != x.capacity ())
{
error ("qpsol: lower and upper bounds and decision variable vector");
error ("must all have the same number of elements");
return retval;
}
bounds.resize (lb_len);
bounds.set_lower_bounds (lb);
bounds.set_upper_bounds (ub);
}
ColumnVector soln;
double objf;
ColumnVector lambda;
int inform;
if (nargin == 3)
{
// 1. qpsol (x, H, c)
QPSOL qp (x, H, c);
qp.copy (qpsol_opts);
soln = qp.minimize (objf, inform, lambda);
goto solved;
}
if (nargin == 5)
{
// 2. qpsol (x, H, c, lb, ub)
QPSOL qp (x, H, c, bounds);
qp.copy (qpsol_opts);
soln = qp.minimize (objf, inform, lambda);
goto solved;
}
if (nargin == 6 || nargin == 8)
{
ColumnVector lub = args(nargin-1).vector_value ();
ColumnVector llb = args(nargin-3).vector_value ();
if (error_state || llb.capacity () == 0 || lub.capacity () == 0)
{
error ("qpsol: bounds for linear constraints must be vectors");
return retval;
}
Matrix A = args(nargin-2).matrix_value ();
if (error_state)
{
error ("qpsol: invalid linear constraint matrix");
return retval;
}
if (! linear_constraints_ok (x, llb, A, lub, "qpsol", 1))
return retval;
LinConst linear_constraints (llb, A, lub);
if (nargin == 8)
{
// 3. qpsol (x, H, c, lb, ub, llb, A, lub)
QPSOL qp (x, H, c, bounds, linear_constraints);
qp.copy (qpsol_opts);
soln = qp.minimize (objf, inform, lambda);
}
else
{
// 4. qpsol (x, H, c, llb, A, lub)
QPSOL qp (x, H, c, linear_constraints);
qp.copy (qpsol_opts);
soln = qp.minimize (objf, inform, lambda);
}
goto solved;
}
return retval;
solved:
retval.resize (nargout ? nargout : 1);
retval(0) = soln, 1;
if (nargout > 1)
retval(1) = objf;
if (nargout > 2)
retval(2) = (double) inform;
if (nargout > 3)
retval(3) = lambda;
#endif
return retval;
}
#ifndef QPSOL_MISSING
typedef void (QPSOL_options::*d_set_opt_mf) (double);
typedef void (QPSOL_options::*i_set_opt_mf) (int);
typedef double (QPSOL_options::*d_get_opt_mf) (void);
typedef int (QPSOL_options::*i_get_opt_mf) (void);
#define MAX_TOKENS 2
struct QPSOL_OPTIONS
{
const char *keyword;
const char *kw_tok[MAX_TOKENS + 1];
int min_len[MAX_TOKENS + 1];
int min_toks_to_match;
d_set_opt_mf d_set_fcn;
i_set_opt_mf i_set_fcn;
d_get_opt_mf d_get_fcn;
i_get_opt_mf i_get_fcn;
};
static QPSOL_OPTIONS qpsol_option_table [] =
{
{ "feasibility tolerance",
{ "feasibility", "tolerance", 0, },
{ 1, 0, 0, }, 1,
QPSOL_options::set_feasibility_tolerance, 0,
QPSOL_options::feasibility_tolerance, 0, },
{ "infinite bound",
{ "infinite", "bound", 0, },
{ 2, 0, 0, }, 1,
QPSOL_options::set_infinite_bound, 0,
QPSOL_options::infinite_bound, 0, },
{ "iteration limit",
{ "iteration", "limit", 0, },
{ 2, 0, 0, }, 1,
0, QPSOL_options::set_iteration_limit,
0, QPSOL_options::iteration_limit, },
{ "print level",
{ "print", "level", 0, },
{ 1, 0, 0, }, 1,
0, QPSOL_options::set_print_level,
0, QPSOL_options::print_level, },
{ 0,
{ 0, 0, 0, },
{ 0, 0, 0, }, 0,
0, 0, 0, 0, },
};
static void
print_qpsol_option_list (void)
{
ostrstream output_buf;
print_usage ("qpsol_options", 1);
output_buf << "\n"
<< "Options for qpsol include:\n\n"
<< " keyword value\n"
<< " ------- -----\n\n";
QPSOL_OPTIONS *list = qpsol_option_table;
const char *keyword;
while ((keyword = list->keyword) != 0)
{
output_buf.form (" %-40s ", keyword);
if (list->d_get_fcn)
{
double val = (qpsol_opts.*list->d_get_fcn) ();
if (val < 0.0)
output_buf << "computed automatically";
else
output_buf << val;
}
else
{
int val = (qpsol_opts.*list->i_get_fcn) ();
if (val < 0)
output_buf << "depends on problem size";
else
output_buf << val;
}
output_buf << "\n";
list++;
}
output_buf << "\n" << ends;
maybe_page_output (output_buf);
}
static void
do_qpsol_option (char *keyword, double val)
{
QPSOL_OPTIONS *list = qpsol_option_table;
while (list->keyword != 0)
{
if (keyword_almost_match (list->kw_tok, list->min_len, keyword,
list->min_toks_to_match, MAX_TOKENS))
{
if (list->d_set_fcn)
(qpsol_opts.*list->d_set_fcn) (val);
else
{
if (xisnan (val))
{
error ("qpsol_options: %s: expecting integer, found NaN",
keyword);
}
else
(qpsol_opts.*list->i_set_fcn) (NINT (val));
}
return;
}
list++;
}
warning ("qpsol_options: no match for `%s'", keyword);
}
#endif
#if defined (QPSOL_MISSING)
DEFUN_DLD_BUILTIN ("qpsol_options", Fqpsol_options, Sqpsol_options, -1, 1,
"This function requires QPSOL, which is not freely\n\
redistributable. For more information, read the file\n\
libcruft/qpsol/README.MISSING in the source distribution.")
#else
DEFUN_DLD_BUILTIN ("qpsol_options", Fqpsol_options, Sqpsol_options, -1, 1,
"qpsol_options (KEYWORD, VALUE)\n
\n\
Set or show options for qpsol. Keywords may be abbreviated\n\
to the shortest match.")
#endif
{
Octave_object retval;
#if defined (QPSOL_MISSING)
print_usage ("qpsol");
#else
int nargin = args.length ();
if (nargin == 0)
{
print_qpsol_option_list ();
return retval;
}
else if (nargin == 2)
{
char *keyword = args(0).string_value ();
if (! error_state)
{
double val = args(1).double_value ();
if (! error_state)
{
do_qpsol_option (keyword, val);
return retval;
}
}
}
print_usage ("qpsol_options");
#endif
return retval;
}
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; page-delimiter: "^/\\*" ***
;;; End: ***
*/