1 /* Copyright (c) 2007-2012 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__)) && !defined(__LCC__)
47 /* annoying Windows syntax for calling functions in a DLL */
48 # if defined(NLOPT_DLL_EXPORT)
49 # define NLOPT_EXTERN(T) extern __declspec(dllexport) T NLOPT_STDCALL
51 # define NLOPT_EXTERN(T) extern __declspec(dllimport) T NLOPT_STDCALL
54 # define NLOPT_EXTERN(T) extern T NLOPT_STDCALL
60 #endif /* __cplusplus */
62 typedef double (*nlopt_func)(unsigned n, const double *x,
63 double *gradient, /* NULL if not needed */
66 typedef void (*nlopt_mfunc)(unsigned m, double *result,
67 unsigned n, const double *x,
68 double *gradient, /* NULL if not needed */
71 /* A preconditioner, which preconditions v at x to return vpre.
72 (The meaning of "preconditioning" is algorithm-dependent.) */
73 typedef void (*nlopt_precond)(unsigned n, const double *x, const double *v,
74 double *vpre, void *data);
77 /* Naming conventions:
80 = global/local derivative/no-derivative optimization,
83 *_RAND algorithms involve some randomization.
85 *_NOSCAL algorithms are *not* scaled to a unit hypercube
86 (i.e. they are sensitive to the units of x)
91 NLOPT_GN_DIRECT_L_RAND,
92 NLOPT_GN_DIRECT_NOSCAL,
93 NLOPT_GN_DIRECT_L_NOSCAL,
94 NLOPT_GN_DIRECT_L_RAND_NOSCAL,
97 NLOPT_GN_ORIG_DIRECT_L,
102 NLOPT_LD_LBFGS_NOCEDAL,
112 NLOPT_LD_TNEWTON_RESTART,
113 NLOPT_LD_TNEWTON_PRECOND,
114 NLOPT_LD_TNEWTON_PRECOND_RESTART,
128 NLOPT_LN_NEWUOA_BOUND,
142 /* new variants that require local_optimizer to be set,
143 not with older constants for backwards compatibility */
155 NLOPT_NUM_ALGORITHMS /* not an algorithm, just the number of them */
158 NLOPT_EXTERN(const char *) nlopt_algorithm_name(nlopt_algorithm a);
161 NLOPT_FAILURE = -1, /* generic failure code */
162 NLOPT_INVALID_ARGS = -2,
163 NLOPT_OUT_OF_MEMORY = -3,
164 NLOPT_ROUNDOFF_LIMITED = -4,
165 NLOPT_FORCED_STOP = -5,
166 NLOPT_SUCCESS = 1, /* generic success code */
167 NLOPT_STOPVAL_REACHED = 2,
168 NLOPT_FTOL_REACHED = 3,
169 NLOPT_XTOL_REACHED = 4,
170 NLOPT_MAXEVAL_REACHED = 5,
171 NLOPT_MAXTIME_REACHED = 6
174 #define NLOPT_MINF_MAX_REACHED NLOPT_STOPVAL_REACHED
176 NLOPT_EXTERN(void) nlopt_srand(unsigned long seed);
177 NLOPT_EXTERN(void) nlopt_srand_time(void);
179 NLOPT_EXTERN(void) nlopt_version(int *major, int *minor, int *bugfix);
181 /*************************** OBJECT-ORIENTED API **************************/
182 /* The style here is that we create an nlopt_opt "object" (an opaque pointer),
183 then set various optimization parameters, and then execute the
184 algorithm. In this way, we can add more and more optimization parameters
185 (including algorithm-specific ones) without breaking backwards
186 compatibility, having functions with zillions of parameters, or
187 relying non-reentrantly on global variables.*/
189 struct nlopt_opt_s; /* opaque structure, defined internally */
190 typedef struct nlopt_opt_s *nlopt_opt;
192 /* the only immutable parameters of an optimization are the algorithm and
193 the dimension n of the problem, since changing either of these could
194 have side-effects on lots of other parameters */
195 NLOPT_EXTERN(nlopt_opt) nlopt_create(nlopt_algorithm algorithm, unsigned n);
196 NLOPT_EXTERN(void) nlopt_destroy(nlopt_opt opt);
197 NLOPT_EXTERN(nlopt_opt) nlopt_copy(const nlopt_opt opt);
199 NLOPT_EXTERN(nlopt_result) nlopt_optimize(nlopt_opt opt, double *x,
202 NLOPT_EXTERN(nlopt_result) nlopt_set_min_objective(nlopt_opt opt, nlopt_func f,
204 NLOPT_EXTERN(nlopt_result) nlopt_set_max_objective(nlopt_opt opt, nlopt_func f,
207 NLOPT_EXTERN(nlopt_result) nlopt_set_precond_min_objective(nlopt_opt opt, nlopt_func f, nlopt_precond pre, void *f_data);
208 NLOPT_EXTERN(nlopt_result) nlopt_set_precond_max_objective(nlopt_opt opt, nlopt_func f, nlopt_precond pre, void *f_data);
210 NLOPT_EXTERN(nlopt_algorithm) nlopt_get_algorithm(const nlopt_opt opt);
211 NLOPT_EXTERN(unsigned) nlopt_get_dimension(const nlopt_opt opt);
215 NLOPT_EXTERN(nlopt_result) nlopt_set_lower_bounds(nlopt_opt opt,
217 NLOPT_EXTERN(nlopt_result) nlopt_set_lower_bounds1(nlopt_opt opt, double lb);
218 NLOPT_EXTERN(nlopt_result) nlopt_get_lower_bounds(const nlopt_opt opt,
220 NLOPT_EXTERN(nlopt_result) nlopt_set_upper_bounds(nlopt_opt opt,
222 NLOPT_EXTERN(nlopt_result) nlopt_set_upper_bounds1(nlopt_opt opt, double ub);
223 NLOPT_EXTERN(nlopt_result) nlopt_get_upper_bounds(const nlopt_opt opt,
226 NLOPT_EXTERN(nlopt_result) nlopt_remove_inequality_constraints(nlopt_opt opt);
227 NLOPT_EXTERN(nlopt_result) nlopt_add_inequality_constraint(nlopt_opt opt,
231 NLOPT_EXTERN(nlopt_result) nlopt_add_precond_inequality_constraint(
232 nlopt_opt opt, nlopt_func fc, nlopt_precond pre, void *fc_data,
234 NLOPT_EXTERN(nlopt_result) nlopt_add_inequality_mconstraint(nlopt_opt opt,
240 NLOPT_EXTERN(nlopt_result) nlopt_remove_equality_constraints(nlopt_opt opt);
241 NLOPT_EXTERN(nlopt_result) nlopt_add_equality_constraint(nlopt_opt opt,
245 NLOPT_EXTERN(nlopt_result) nlopt_add_precond_equality_constraint(
246 nlopt_opt opt, nlopt_func h, nlopt_precond pre, void *h_data,
248 NLOPT_EXTERN(nlopt_result) nlopt_add_equality_mconstraint(nlopt_opt opt,
254 /* stopping criteria: */
256 NLOPT_EXTERN(nlopt_result) nlopt_set_stopval(nlopt_opt opt, double stopval);
257 NLOPT_EXTERN(double) nlopt_get_stopval(const nlopt_opt opt);
259 NLOPT_EXTERN(nlopt_result) nlopt_set_ftol_rel(nlopt_opt opt, double tol);
260 NLOPT_EXTERN(double) nlopt_get_ftol_rel(const nlopt_opt opt);
261 NLOPT_EXTERN(nlopt_result) nlopt_set_ftol_abs(nlopt_opt opt, double tol);
262 NLOPT_EXTERN(double) nlopt_get_ftol_abs(const nlopt_opt opt);
264 NLOPT_EXTERN(nlopt_result) nlopt_set_xtol_rel(nlopt_opt opt, double tol);
265 NLOPT_EXTERN(double) nlopt_get_xtol_rel(const nlopt_opt opt);
266 NLOPT_EXTERN(nlopt_result) nlopt_set_xtol_abs1(nlopt_opt opt, double tol);
267 NLOPT_EXTERN(nlopt_result) nlopt_set_xtol_abs(nlopt_opt opt, const double *tol);
268 NLOPT_EXTERN(nlopt_result) nlopt_get_xtol_abs(const nlopt_opt opt,
271 NLOPT_EXTERN(nlopt_result) nlopt_set_maxeval(nlopt_opt opt, int maxeval);
272 NLOPT_EXTERN(int) nlopt_get_maxeval(const nlopt_opt opt);
274 NLOPT_EXTERN(nlopt_result) nlopt_set_maxtime(nlopt_opt opt, double maxtime);
275 NLOPT_EXTERN(double) nlopt_get_maxtime(const nlopt_opt opt);
277 NLOPT_EXTERN(nlopt_result) nlopt_force_stop(nlopt_opt opt);
278 NLOPT_EXTERN(nlopt_result) nlopt_set_force_stop(nlopt_opt opt, int val);
279 NLOPT_EXTERN(int) nlopt_get_force_stop(const nlopt_opt opt);
281 /* more algorithm-specific parameters */
283 NLOPT_EXTERN(nlopt_result) nlopt_set_local_optimizer(nlopt_opt opt,
284 const nlopt_opt local_opt);
286 NLOPT_EXTERN(nlopt_result) nlopt_set_population(nlopt_opt opt, unsigned pop);
287 NLOPT_EXTERN(unsigned) nlopt_get_population(const nlopt_opt opt);
289 NLOPT_EXTERN(nlopt_result) nlopt_set_vector_storage(nlopt_opt opt, unsigned dim);
290 NLOPT_EXTERN(unsigned) nlopt_get_vector_storage(const nlopt_opt opt);
292 NLOPT_EXTERN(nlopt_result) nlopt_set_default_initial_step(nlopt_opt opt,
294 NLOPT_EXTERN(nlopt_result) nlopt_set_initial_step(nlopt_opt opt,
296 NLOPT_EXTERN(nlopt_result) nlopt_set_initial_step1(nlopt_opt opt, double dx);
297 NLOPT_EXTERN(nlopt_result) nlopt_get_initial_step(const nlopt_opt opt,
298 const double *x, double *dx);
300 /* the following are functions mainly designed to be used internally
301 by the Fortran and SWIG wrappers, allow us to tel nlopt_destroy and
302 nlopt_copy to do something to the f_data pointers (e.g. free or
303 duplicate them, respectively) */
304 typedef void* (*nlopt_munge)(void *p);
305 NLOPT_EXTERN(void) nlopt_set_munge(nlopt_opt opt,
306 nlopt_munge munge_on_destroy,
307 nlopt_munge munge_on_copy);
308 typedef void* (*nlopt_munge2)(void *p, void *data);
309 NLOPT_EXTERN(void) nlopt_munge_data(nlopt_opt opt,
310 nlopt_munge2 munge, void *data);
312 /*************************** DEPRECATED API **************************/
313 /* The new "object-oriented" API is preferred, since it allows us to
314 gracefully add new features and algorithm-specific options in a
315 re-entrant way, and we can automatically assume reasonable defaults
316 for unspecified parameters. */
318 /* Where possible (e.g. for gcc >= 3.1), enable a compiler warning
319 for code that uses a deprecated function */
320 #if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__==3 && __GNUC_MINOR__ > 0))
321 # define NLOPT_DEPRECATED __attribute__((deprecated))
323 # define NLOPT_DEPRECATED
326 typedef double (*nlopt_func_old)(int n, const double *x,
327 double *gradient, /* NULL if not needed */
330 NLOPT_EXTERN(nlopt_result) nlopt_minimize(
331 nlopt_algorithm algorithm,
332 int n, nlopt_func_old f, void *f_data,
333 const double *lb, const double *ub, /* bounds */
334 double *x, /* in: initial guess, out: minimizer */
335 double *minf, /* out: minimum */
336 double minf_max, double ftol_rel, double ftol_abs,
337 double xtol_rel, const double *xtol_abs,
338 int maxeval, double maxtime) NLOPT_DEPRECATED;
340 NLOPT_EXTERN(nlopt_result) nlopt_minimize_constrained(
341 nlopt_algorithm algorithm,
342 int n, nlopt_func_old f, void *f_data,
343 int m, nlopt_func_old fc, void *fc_data, ptrdiff_t fc_datum_size,
344 const double *lb, const double *ub, /* bounds */
345 double *x, /* in: initial guess, out: minimizer */
346 double *minf, /* out: minimum */
347 double minf_max, double ftol_rel, double ftol_abs,
348 double xtol_rel, const double *xtol_abs,
349 int maxeval, double maxtime) NLOPT_DEPRECATED;
351 NLOPT_EXTERN(nlopt_result) nlopt_minimize_econstrained(
352 nlopt_algorithm algorithm,
353 int n, nlopt_func_old f, void *f_data,
354 int m, nlopt_func_old fc, void *fc_data, ptrdiff_t fc_datum_size,
355 int p, nlopt_func_old h, void *h_data, ptrdiff_t h_datum_size,
356 const double *lb, const double *ub, /* bounds */
357 double *x, /* in: initial guess, out: minimizer */
358 double *minf, /* out: minimum */
359 double minf_max, double ftol_rel, double ftol_abs,
360 double xtol_rel, const double *xtol_abs,
361 double htol_rel, double htol_abs,
362 int maxeval, double maxtime) NLOPT_DEPRECATED;
364 NLOPT_EXTERN(void) nlopt_get_local_search_algorithm(nlopt_algorithm *deriv,
365 nlopt_algorithm *nonderiv,
366 int *maxeval) NLOPT_DEPRECATED;
367 NLOPT_EXTERN(void) nlopt_set_local_search_algorithm(nlopt_algorithm deriv,
368 nlopt_algorithm nonderiv,
369 int maxeval) NLOPT_DEPRECATED;
371 NLOPT_EXTERN(int) nlopt_get_stochastic_population(void) NLOPT_DEPRECATED;
372 NLOPT_EXTERN(void) nlopt_set_stochastic_population(int pop) NLOPT_DEPRECATED;
374 /*********************************************************************/
378 #endif /* __cplusplus */