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(T) extern __declspec(dllimport) T NLOPT_STDCALL
50 # define NLOPT_EXTERN(T) extern T NLOPT_STDCALL
56 #endif /* __cplusplus */
58 typedef double (*nlopt_func)(unsigned n, const double *x,
59 double *gradient, /* NULL if not needed */
62 typedef void (*nlopt_mfunc)(unsigned m, double *result,
63 unsigned n, const double *x,
64 double *gradient, /* NULL if not needed */
68 /* Naming conventions:
71 = global/local derivative/no-derivative optimization,
74 *_RAND algorithms involve some randomization.
76 *_NOSCAL algorithms are *not* scaled to a unit hypercube
77 (i.e. they are sensitive to the units of x)
82 NLOPT_GN_DIRECT_L_RAND,
83 NLOPT_GN_DIRECT_NOSCAL,
84 NLOPT_GN_DIRECT_L_NOSCAL,
85 NLOPT_GN_DIRECT_L_RAND_NOSCAL,
88 NLOPT_GN_ORIG_DIRECT_L,
93 NLOPT_LD_LBFGS_NOCEDAL,
103 NLOPT_LD_TNEWTON_RESTART,
104 NLOPT_LD_TNEWTON_PRECOND,
105 NLOPT_LD_TNEWTON_PRECOND_RESTART,
119 NLOPT_LN_NEWUOA_BOUND,
133 /* new variants that require local_optimizer to be set,
134 not with older constants for backwards compatibility */
140 NLOPT_NUM_ALGORITHMS /* not an algorithm, just the number of them */
143 extern const char *nlopt_algorithm_name(nlopt_algorithm a);
146 NLOPT_FAILURE = -1, /* generic failure code */
147 NLOPT_INVALID_ARGS = -2,
148 NLOPT_OUT_OF_MEMORY = -3,
149 NLOPT_ROUNDOFF_LIMITED = -4,
150 NLOPT_FORCED_STOP = -5,
151 NLOPT_SUCCESS = 1, /* generic success code */
152 NLOPT_STOPVAL_REACHED = 2,
153 NLOPT_FTOL_REACHED = 3,
154 NLOPT_XTOL_REACHED = 4,
155 NLOPT_MAXEVAL_REACHED = 5,
156 NLOPT_MAXTIME_REACHED = 6
159 #define NLOPT_MINF_MAX_REACHED NLOPT_STOPVAL_REACHED
161 NLOPT_EXTERN(void) nlopt_srand(unsigned long seed);
162 NLOPT_EXTERN(void) nlopt_srand_time(void);
164 NLOPT_EXTERN(void) nlopt_version(int *major, int *minor, int *bugfix);
166 /*************************** OBJECT-ORIENTED API **************************/
167 /* The style here is that we create an nlopt_opt "object" (an opaque pointer),
168 then set various optimization parameters, and then execute the
169 algorithm. In this way, we can add more and more optimization parameters
170 (including algorithm-specific ones) without breaking backwards
171 compatibility, having functions with zillions of parameters, or
172 relying non-reentrantly on global variables.*/
174 struct nlopt_opt_s; /* opaque structure, defined internally */
175 typedef struct nlopt_opt_s *nlopt_opt;
177 /* the only immutable parameters of an optimization are the algorithm and
178 the dimension n of the problem, since changing either of these could
179 have side-effects on lots of other parameters */
180 NLOPT_EXTERN(nlopt_opt) nlopt_create(nlopt_algorithm algorithm, unsigned n);
181 NLOPT_EXTERN(void) nlopt_destroy(nlopt_opt opt);
182 NLOPT_EXTERN(nlopt_opt) nlopt_copy(const nlopt_opt opt);
184 NLOPT_EXTERN(nlopt_result) nlopt_optimize(nlopt_opt opt, double *x,
187 NLOPT_EXTERN(nlopt_result) nlopt_set_min_objective(nlopt_opt opt, nlopt_func f,
189 NLOPT_EXTERN(nlopt_result) nlopt_set_max_objective(nlopt_opt opt, nlopt_func f,
192 NLOPT_EXTERN(nlopt_algorithm) nlopt_get_algorithm(const nlopt_opt opt);
193 NLOPT_EXTERN(unsigned) nlopt_get_dimension(const nlopt_opt opt);
197 NLOPT_EXTERN(nlopt_result) nlopt_set_lower_bounds(nlopt_opt opt,
199 NLOPT_EXTERN(nlopt_result) nlopt_set_lower_bounds1(nlopt_opt opt, double lb);
200 NLOPT_EXTERN(nlopt_result) nlopt_get_lower_bounds(const nlopt_opt opt,
202 NLOPT_EXTERN(nlopt_result) nlopt_set_upper_bounds(nlopt_opt opt,
204 NLOPT_EXTERN(nlopt_result) nlopt_set_upper_bounds1(nlopt_opt opt, double ub);
205 NLOPT_EXTERN(nlopt_result) nlopt_get_upper_bounds(const nlopt_opt opt,
208 NLOPT_EXTERN(nlopt_result) nlopt_remove_inequality_constraints(nlopt_opt opt);
209 NLOPT_EXTERN(nlopt_result) nlopt_add_inequality_constraint(nlopt_opt opt,
213 NLOPT_EXTERN(nlopt_result) nlopt_add_inequality_mconstraint(nlopt_opt opt,
219 NLOPT_EXTERN(nlopt_result) nlopt_remove_equality_constraints(nlopt_opt opt);
220 NLOPT_EXTERN(nlopt_result) nlopt_add_equality_constraint(nlopt_opt opt,
224 NLOPT_EXTERN(nlopt_result) nlopt_add_equality_mconstraint(nlopt_opt opt,
230 /* stopping criteria: */
232 NLOPT_EXTERN(nlopt_result) nlopt_set_stopval(nlopt_opt opt, double stopval);
233 NLOPT_EXTERN(double) nlopt_get_stopval(const nlopt_opt opt);
235 NLOPT_EXTERN(nlopt_result) nlopt_set_ftol_rel(nlopt_opt opt, double tol);
236 NLOPT_EXTERN(double) nlopt_get_ftol_rel(const nlopt_opt opt);
237 NLOPT_EXTERN(nlopt_result) nlopt_set_ftol_abs(nlopt_opt opt, double tol);
238 NLOPT_EXTERN(double) nlopt_get_ftol_abs(const nlopt_opt opt);
240 NLOPT_EXTERN(nlopt_result) nlopt_set_xtol_rel(nlopt_opt opt, double tol);
241 NLOPT_EXTERN(double) nlopt_get_xtol_rel(const nlopt_opt opt);
242 NLOPT_EXTERN(nlopt_result) nlopt_set_xtol_abs1(nlopt_opt opt, double tol);
243 NLOPT_EXTERN(nlopt_result) nlopt_set_xtol_abs(nlopt_opt opt, const double *tol);
244 NLOPT_EXTERN(nlopt_result) nlopt_get_xtol_abs(const nlopt_opt opt,
247 NLOPT_EXTERN(nlopt_result) nlopt_set_maxeval(nlopt_opt opt, int maxeval);
248 NLOPT_EXTERN(int) nlopt_get_maxeval(nlopt_opt opt);
250 NLOPT_EXTERN(nlopt_result) nlopt_set_maxtime(nlopt_opt opt, double maxtime);
251 NLOPT_EXTERN(double) nlopt_get_maxtime(nlopt_opt opt);
253 NLOPT_EXTERN(nlopt_result) nlopt_force_stop(nlopt_opt opt);
254 NLOPT_EXTERN(nlopt_result) nlopt_set_force_stop(nlopt_opt opt, int val);
255 NLOPT_EXTERN(int) nlopt_get_force_stop(nlopt_opt opt);
257 /* more algorithm-specific parameters */
259 NLOPT_EXTERN(nlopt_result) nlopt_set_local_optimizer(nlopt_opt opt,
260 const nlopt_opt local_opt);
262 NLOPT_EXTERN(nlopt_result) nlopt_set_population(nlopt_opt opt, unsigned pop);
263 NLOPT_EXTERN(unsigned) nlopt_get_population(const nlopt_opt opt);
265 NLOPT_EXTERN(nlopt_result) nlopt_set_default_initial_step(nlopt_opt opt,
267 NLOPT_EXTERN(nlopt_result) nlopt_set_initial_step(nlopt_opt opt,
269 NLOPT_EXTERN(nlopt_result) nlopt_set_initial_step1(nlopt_opt opt, double dx);
270 NLOPT_EXTERN(nlopt_result) nlopt_get_initial_step(const nlopt_opt opt,
271 const double *x, double *dx);
273 /* the following are functions mainly designed to be used internally
274 by the Fortran and SWIG wrappers, allow us to tel nlopt_destroy and
275 nlopt_copy to do something to the f_data pointers (e.g. free or
276 duplicate them, respectively) */
277 typedef void* (*nlopt_munge)(void *p);
278 NLOPT_EXTERN(void) nlopt_set_munge(nlopt_opt opt,
279 nlopt_munge munge_on_destroy,
280 nlopt_munge munge_on_copy);
282 /*************************** DEPRECATED API **************************/
283 /* The new "object-oriented" API is preferred, since it allows us to
284 gracefully add new features and algorithm-specific options in a
285 re-entrant way, and we can automatically assume reasonable defaults
286 for unspecified parameters. */
288 /* Where possible (e.g. for gcc >= 3.1), enable a compiler warning
289 for code that uses a deprecated function */
290 #if defined(__GNUC__) && (__GNUC__ > 3 || (__GNUC__==3 && __GNUC_MINOR__ > 0))
291 # define NLOPT_DEPRECATED __attribute__((deprecated))
293 # define NLOPT_DEPRECATED
296 typedef double (*nlopt_func_old)(int n, const double *x,
297 double *gradient, /* NULL if not needed */
300 NLOPT_EXTERN(nlopt_result) nlopt_minimize(
301 nlopt_algorithm algorithm,
302 int n, nlopt_func_old f, void *f_data,
303 const double *lb, const double *ub, /* bounds */
304 double *x, /* in: initial guess, out: minimizer */
305 double *minf, /* out: minimum */
306 double minf_max, double ftol_rel, double ftol_abs,
307 double xtol_rel, const double *xtol_abs,
308 int maxeval, double maxtime) NLOPT_DEPRECATED;
310 NLOPT_EXTERN(nlopt_result) nlopt_minimize_constrained(
311 nlopt_algorithm algorithm,
312 int n, nlopt_func_old f, void *f_data,
313 int m, nlopt_func_old fc, void *fc_data, ptrdiff_t fc_datum_size,
314 const double *lb, const double *ub, /* bounds */
315 double *x, /* in: initial guess, out: minimizer */
316 double *minf, /* out: minimum */
317 double minf_max, double ftol_rel, double ftol_abs,
318 double xtol_rel, const double *xtol_abs,
319 int maxeval, double maxtime) NLOPT_DEPRECATED;
321 NLOPT_EXTERN(nlopt_result) nlopt_minimize_econstrained(
322 nlopt_algorithm algorithm,
323 int n, nlopt_func_old f, void *f_data,
324 int m, nlopt_func_old fc, void *fc_data, ptrdiff_t fc_datum_size,
325 int p, nlopt_func_old h, void *h_data, ptrdiff_t h_datum_size,
326 const double *lb, const double *ub, /* bounds */
327 double *x, /* in: initial guess, out: minimizer */
328 double *minf, /* out: minimum */
329 double minf_max, double ftol_rel, double ftol_abs,
330 double xtol_rel, const double *xtol_abs,
331 double htol_rel, double htol_abs,
332 int maxeval, double maxtime) NLOPT_DEPRECATED;
334 NLOPT_EXTERN(void) nlopt_get_local_search_algorithm(nlopt_algorithm *deriv,
335 nlopt_algorithm *nonderiv,
336 int *maxeval) NLOPT_DEPRECATED;
337 NLOPT_EXTERN(void) nlopt_set_local_search_algorithm(nlopt_algorithm deriv,
338 nlopt_algorithm nonderiv,
339 int maxeval) NLOPT_DEPRECATED;
341 NLOPT_EXTERN(int) nlopt_get_stochastic_population(void) NLOPT_DEPRECATED;
342 NLOPT_EXTERN(void) nlopt_set_stochastic_population(int pop) NLOPT_DEPRECATED;
344 /*********************************************************************/
348 #endif /* __cplusplus */