1 /* Copyright (c) 2007-2010 Massachusetts Institute of Technology
3 * Permission is hereby granted, free of charge, to any person obtaining
4 * a copy of this software and associated documentation files (the
5 * "Software"), to deal in the Software without restriction, including
6 * without limitation the rights to use, copy, modify, merge, publish,
7 * distribute, sublicense, and/or sell copies of the Software, and to
8 * permit persons to whom the Software is furnished to do so, subject to
9 * the following conditions:
11 * The above copyright notice and this permission notice shall be
12 * included in all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
15 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
17 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
18 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
19 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
20 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 #include <stddef.h> /* for ptrdiff_t and size_t */
28 /* use stdcall convention under Windows, since this seems to
29 be more standard there and is important for calling from .NET */
30 #if defined(_WIN32) || defined(__WIN32__)
31 # if defined(__GNUC__)
32 # define NLOPT_STDCALL __attribute__((stdcall))
33 # elif defined(_MSC_VER) || defined(_ICC) || defined(_STDCALL_SUPPORTED)
34 # define NLOPT_STDCALL __stdcall
36 # define NLOPT_STDCALL
39 # define NLOPT_STDCALL
42 /* for Windows compilers, you should add a line
44 when using NLopt from a DLL, in order to do the proper
45 Windows importing nonsense. */
46 #if defined(NLOPT_DLL) && (defined(_WIN32) || defined(__WIN32__))
47 /* annoying Windows syntax for calling functions in a DLL */
48 # define NLOPT_EXTERN extern __declspec(dllimport) NLOPT_STDCALL
50 # define NLOPT_EXTERN extern NLOPT_STDCALL
56 #endif /* __cplusplus */
58 typedef double (*nlopt_func)(unsigned n, const double *x,
59 double *gradient, /* NULL if not needed */
63 /* Naming conventions:
66 = global/local derivative/no-derivative optimization,
69 *_RAND algorithms involve some randomization.
71 *_NOSCAL algorithms are *not* scaled to a unit hypercube
72 (i.e. they are sensitive to the units of x)
77 NLOPT_GN_DIRECT_L_RAND,
78 NLOPT_GN_DIRECT_NOSCAL,
79 NLOPT_GN_DIRECT_L_NOSCAL,
80 NLOPT_GN_DIRECT_L_RAND_NOSCAL,
83 NLOPT_GN_ORIG_DIRECT_L,
88 NLOPT_LD_LBFGS_NOCEDAL,
98 NLOPT_LD_TNEWTON_RESTART,
99 NLOPT_LD_TNEWTON_PRECOND,
100 NLOPT_LD_TNEWTON_PRECOND_RESTART,
114 NLOPT_LN_NEWUOA_BOUND,
128 /* not with older AUGLAG constants for backwards compatibility */
132 NLOPT_NUM_ALGORITHMS /* not an algorithm, just the number of them */
135 extern const char *nlopt_algorithm_name(nlopt_algorithm a);
138 NLOPT_FAILURE = -1, /* generic failure code */
139 NLOPT_INVALID_ARGS = -2,
140 NLOPT_OUT_OF_MEMORY = -3,
141 NLOPT_ROUNDOFF_LIMITED = -4,
142 NLOPT_FORCED_STOP = -5,
143 NLOPT_SUCCESS = 1, /* generic success code */
144 NLOPT_STOPVAL_REACHED = 2,
145 NLOPT_FTOL_REACHED = 3,
146 NLOPT_XTOL_REACHED = 4,
147 NLOPT_MAXEVAL_REACHED = 5,
148 NLOPT_MAXTIME_REACHED = 6
151 #define NLOPT_MINF_MAX_REACHED NLOPT_STOPVAL_REACHED
153 NLOPT_EXTERN void nlopt_srand(unsigned long seed);
154 NLOPT_EXTERN void nlopt_srand_time(void);
156 NLOPT_EXTERN void nlopt_version(int *major, int *minor, int *bugfix);
158 /*************************** OBJECT-ORIENTED API **************************/
159 /* The style here is that we create an nlopt_opt "object" (an opaque pointer),
160 then set various optimization parameters, and then execute the
161 algorithm. In this way, we can add more and more optimization parameters
162 (including algorithm-specific ones) without breaking backwards
163 compatibility, having functions with zillions of parameters, or
164 relying non-reentrantly on global variables.*/
166 struct nlopt_opt_s; /* opaque structure, defined internally */
167 typedef struct nlopt_opt_s *nlopt_opt;
169 /* the only immutable parameters of an optimization are the algorithm and
170 the dimension n of the problem, since changing either of these could
171 have side-effects on lots of other parameters */
172 NLOPT_EXTERN nlopt_opt nlopt_create(nlopt_algorithm algorithm, unsigned n);
173 NLOPT_EXTERN void nlopt_destroy(nlopt_opt opt);
174 NLOPT_EXTERN nlopt_opt nlopt_copy(const nlopt_opt opt);
176 NLOPT_EXTERN nlopt_result nlopt_optimize(nlopt_opt opt, double *x,
179 NLOPT_EXTERN nlopt_result nlopt_set_min_objective(nlopt_opt opt, nlopt_func f,
181 NLOPT_EXTERN nlopt_result nlopt_set_max_objective(nlopt_opt opt, nlopt_func f,
184 NLOPT_EXTERN nlopt_algorithm nlopt_get_algorithm(const nlopt_opt opt);
185 NLOPT_EXTERN unsigned nlopt_get_dimension(const nlopt_opt opt);
189 NLOPT_EXTERN nlopt_result nlopt_set_lower_bounds(nlopt_opt opt,
191 NLOPT_EXTERN nlopt_result nlopt_set_lower_bounds1(nlopt_opt opt, double lb);
192 NLOPT_EXTERN nlopt_result nlopt_get_lower_bounds(const nlopt_opt opt,
194 NLOPT_EXTERN nlopt_result nlopt_set_upper_bounds(nlopt_opt opt,
196 NLOPT_EXTERN nlopt_result nlopt_set_upper_bounds1(nlopt_opt opt, double ub);
197 NLOPT_EXTERN nlopt_result nlopt_get_upper_bounds(const nlopt_opt opt,
200 NLOPT_EXTERN nlopt_result nlopt_remove_inequality_constraints(nlopt_opt opt);
201 NLOPT_EXTERN nlopt_result nlopt_add_inequality_constraint(nlopt_opt opt,
206 NLOPT_EXTERN nlopt_result nlopt_remove_equality_constraints(nlopt_opt opt);
207 NLOPT_EXTERN nlopt_result nlopt_add_equality_constraint(nlopt_opt opt,
212 /* stopping criteria: */
214 NLOPT_EXTERN nlopt_result nlopt_set_stopval(nlopt_opt opt, double stopval);
215 NLOPT_EXTERN double nlopt_get_stopval(const nlopt_opt opt);
217 NLOPT_EXTERN nlopt_result nlopt_set_ftol_rel(nlopt_opt opt, double tol);
218 NLOPT_EXTERN double nlopt_get_ftol_rel(const nlopt_opt opt);
219 NLOPT_EXTERN nlopt_result nlopt_set_ftol_abs(nlopt_opt opt, double tol);
220 NLOPT_EXTERN double nlopt_get_ftol_abs(const nlopt_opt opt);
222 NLOPT_EXTERN nlopt_result nlopt_set_xtol_rel(nlopt_opt opt, double tol);
223 NLOPT_EXTERN double nlopt_get_xtol_rel(const nlopt_opt opt);
224 NLOPT_EXTERN nlopt_result nlopt_set_xtol_abs1(nlopt_opt opt, double tol);
225 NLOPT_EXTERN nlopt_result nlopt_set_xtol_abs(nlopt_opt opt, const double *tol);
226 NLOPT_EXTERN nlopt_result nlopt_get_xtol_abs(const nlopt_opt opt,
229 NLOPT_EXTERN nlopt_result nlopt_set_maxeval(nlopt_opt opt, int maxeval);
230 NLOPT_EXTERN int nlopt_get_maxeval(nlopt_opt opt);
232 NLOPT_EXTERN nlopt_result nlopt_set_maxtime(nlopt_opt opt, double maxtime);
233 NLOPT_EXTERN double nlopt_get_maxtime(nlopt_opt opt);
235 NLOPT_EXTERN nlopt_result nlopt_force_stop(nlopt_opt opt);
236 NLOPT_EXTERN nlopt_result nlopt_set_force_stop(nlopt_opt opt, int val);
237 NLOPT_EXTERN int nlopt_get_force_stop(nlopt_opt opt);
239 /* more algorithm-specific parameters */
241 NLOPT_EXTERN nlopt_result nlopt_set_local_optimizer(nlopt_opt opt,
242 const nlopt_opt local_opt);
244 NLOPT_EXTERN nlopt_result nlopt_set_population(nlopt_opt opt, unsigned pop);
245 NLOPT_EXTERN unsigned nlopt_get_population(const nlopt_opt opt);
247 NLOPT_EXTERN nlopt_result nlopt_set_default_initial_step(nlopt_opt opt,
249 NLOPT_EXTERN nlopt_result nlopt_set_initial_step(nlopt_opt opt,
251 NLOPT_EXTERN nlopt_result nlopt_set_initial_step1(nlopt_opt opt, double dx);
252 NLOPT_EXTERN nlopt_result nlopt_get_initial_step(const nlopt_opt opt,
253 const double *x, double *dx);
255 /* the following are functions mainly designed to be used internally
256 by the Fortran and SWIG wrappers, allow us to tel nlopt_destroy and
257 nlopt_copy to do something to the f_data pointers (e.g. free or
258 duplicate them, respectively) */
259 typedef void* (*nlopt_munge)(void *p);
260 NLOPT_EXTERN void nlopt_set_munge(nlopt_opt opt,
261 nlopt_munge munge_on_destroy,
262 nlopt_munge munge_on_copy);
264 /*************************** DEPRECATED API **************************/
265 /* The new "object-oriented" API is preferred, since it allows us to
266 gracefully add new features and algorithm-specific options in a
267 re-entrant way, and we can automatically assume reasonable defaults
268 for unspecified parameters. */
270 /* Where possible (e.g. for gcc >= 3.1), enable a compiler warning
271 for code that uses a deprecated function */
272 #if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__==3 && __GNUC_MINOR__ > 0))
273 # define NLOPT_DEPRECATED __attribute__((deprecated))
275 # define NLOPT_DEPRECATED
278 typedef double (*nlopt_func_old)(int n, const double *x,
279 double *gradient, /* NULL if not needed */
282 NLOPT_EXTERN nlopt_result nlopt_minimize(
283 nlopt_algorithm algorithm,
284 int n, nlopt_func_old f, void *f_data,
285 const double *lb, const double *ub, /* bounds */
286 double *x, /* in: initial guess, out: minimizer */
287 double *minf, /* out: minimum */
288 double minf_max, double ftol_rel, double ftol_abs,
289 double xtol_rel, const double *xtol_abs,
290 int maxeval, double maxtime) NLOPT_DEPRECATED;
292 NLOPT_EXTERN nlopt_result nlopt_minimize_constrained(
293 nlopt_algorithm algorithm,
294 int n, nlopt_func_old f, void *f_data,
295 int m, nlopt_func_old fc, void *fc_data, ptrdiff_t fc_datum_size,
296 const double *lb, const double *ub, /* bounds */
297 double *x, /* in: initial guess, out: minimizer */
298 double *minf, /* out: minimum */
299 double minf_max, double ftol_rel, double ftol_abs,
300 double xtol_rel, const double *xtol_abs,
301 int maxeval, double maxtime) NLOPT_DEPRECATED;
303 NLOPT_EXTERN nlopt_result nlopt_minimize_econstrained(
304 nlopt_algorithm algorithm,
305 int n, nlopt_func_old f, void *f_data,
306 int m, nlopt_func_old fc, void *fc_data, ptrdiff_t fc_datum_size,
307 int p, nlopt_func_old h, void *h_data, ptrdiff_t h_datum_size,
308 const double *lb, const double *ub, /* bounds */
309 double *x, /* in: initial guess, out: minimizer */
310 double *minf, /* out: minimum */
311 double minf_max, double ftol_rel, double ftol_abs,
312 double xtol_rel, const double *xtol_abs,
313 double htol_rel, double htol_abs,
314 int maxeval, double maxtime) NLOPT_DEPRECATED;
316 NLOPT_EXTERN void nlopt_get_local_search_algorithm(nlopt_algorithm *deriv,
317 nlopt_algorithm *nonderiv,
318 int *maxeval) NLOPT_DEPRECATED;
319 NLOPT_EXTERN void nlopt_set_local_search_algorithm(nlopt_algorithm deriv,
320 nlopt_algorithm nonderiv,
321 int maxeval) NLOPT_DEPRECATED;
323 NLOPT_EXTERN int nlopt_get_stochastic_population(void) NLOPT_DEPRECATED;
324 NLOPT_EXTERN void nlopt_set_stochastic_population(int pop) NLOPT_DEPRECATED;
326 /*********************************************************************/
330 #endif /* __cplusplus */