1 | /* |
1 | /* |
2 | * This file is part of Crossfire TRT, the Roguelike Realtime MORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Crossfire TRT is free software: you can redistribute it and/or modify |
6 | * Deliantra is free software: you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation, either version 3 of the License, or |
8 | * the Free Software Foundation, either version 3 of the License, or |
9 | * (at your option) any later version. |
9 | * (at your option) any later version. |
10 | * |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
11 | * This program is distributed in the hope that it will be useful, |
… | |
… | |
14 | * GNU General Public License for more details. |
14 | * GNU General Public License for more details. |
15 | * |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
18 | * |
18 | * |
19 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
19 | * The authors can be reached via e-mail to <support@deliantra.net> |
20 | */ |
20 | */ |
21 | |
21 | |
22 | #ifndef UTIL_H__ |
22 | #ifndef UTIL_H__ |
23 | #define UTIL_H__ |
23 | #define UTIL_H__ |
24 | |
24 | |
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25 | #define DEBUG_SALLOC 0 |
25 | //#define PREFER_MALLOC |
26 | #define PREFER_MALLOC 0 |
26 | |
27 | |
27 | #if __GNUC__ >= 3 |
28 | #if __GNUC__ >= 3 |
28 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
31 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
… | |
… | |
52 | #include <glib.h> |
53 | #include <glib.h> |
53 | |
54 | |
54 | #include <shstr.h> |
55 | #include <shstr.h> |
55 | #include <traits.h> |
56 | #include <traits.h> |
56 | |
57 | |
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58 | #if DEBUG_SALLOC |
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59 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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60 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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61 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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62 | void *g_slice_alloc (unsigned long size); |
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63 | void *g_slice_alloc0 (unsigned long size); |
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64 | void g_slice_free1 (unsigned long size, void *ptr); |
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65 | #endif |
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66 | |
57 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
67 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
68 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | |
69 | |
60 | // very ugly macro that basicaly declares and initialises a variable |
70 | // very ugly macro that basicaly declares and initialises a variable |
61 | // that is in scope for the next statement only |
71 | // that is in scope for the next statement only |
… | |
… | |
79 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
89 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
80 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
90 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
81 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; } |
91 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; } |
82 | |
92 | |
83 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
93 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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94 | |
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95 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
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96 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
84 | |
97 | |
85 | template<typename T> |
98 | template<typename T> |
86 | static inline T |
99 | static inline T |
87 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
100 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
88 | { |
101 | { |
… | |
… | |
172 | absdir (int d) |
185 | absdir (int d) |
173 | { |
186 | { |
174 | return ((d - 1) & 7) + 1; |
187 | return ((d - 1) & 7) + 1; |
175 | } |
188 | } |
176 | |
189 | |
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190 | extern size_t slice_alloc; // statistics |
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191 | |
177 | // makes dynamically allocated objects zero-initialised |
192 | // makes dynamically allocated objects zero-initialised |
178 | struct zero_initialised |
193 | struct zero_initialised |
179 | { |
194 | { |
180 | void *operator new (size_t s, void *p) |
195 | void *operator new (size_t s, void *p) |
181 | { |
196 | { |
… | |
… | |
183 | return p; |
198 | return p; |
184 | } |
199 | } |
185 | |
200 | |
186 | void *operator new (size_t s) |
201 | void *operator new (size_t s) |
187 | { |
202 | { |
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203 | slice_alloc += s; |
188 | return g_slice_alloc0 (s); |
204 | return g_slice_alloc0 (s); |
189 | } |
205 | } |
190 | |
206 | |
191 | void *operator new[] (size_t s) |
207 | void *operator new[] (size_t s) |
192 | { |
208 | { |
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209 | slice_alloc += s; |
193 | return g_slice_alloc0 (s); |
210 | return g_slice_alloc0 (s); |
194 | } |
211 | } |
195 | |
212 | |
196 | void operator delete (void *p, size_t s) |
213 | void operator delete (void *p, size_t s) |
197 | { |
214 | { |
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215 | slice_alloc -= s; |
198 | g_slice_free1 (s, p); |
216 | g_slice_free1 (s, p); |
199 | } |
217 | } |
200 | |
218 | |
201 | void operator delete[] (void *p, size_t s) |
219 | void operator delete[] (void *p, size_t s) |
202 | { |
220 | { |
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221 | slice_alloc -= s; |
203 | g_slice_free1 (s, p); |
222 | g_slice_free1 (s, p); |
204 | } |
223 | } |
205 | }; |
224 | }; |
206 | |
225 | |
207 | void *salloc_ (int n) throw (std::bad_alloc); |
226 | void *salloc_ (int n) throw (std::bad_alloc); |
… | |
… | |
222 | |
241 | |
223 | // for symmetry |
242 | // for symmetry |
224 | template<typename T> |
243 | template<typename T> |
225 | inline void sfree (T *ptr, int n = 1) throw () |
244 | inline void sfree (T *ptr, int n = 1) throw () |
226 | { |
245 | { |
227 | #ifdef PREFER_MALLOC |
246 | #if PREFER_MALLOC |
228 | free (ptr); |
247 | free (ptr); |
229 | #else |
248 | #else |
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249 | slice_alloc -= n * sizeof (T); |
230 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
250 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
231 | #endif |
251 | #endif |
232 | } |
252 | } |
233 | |
253 | |
234 | // a STL-compatible allocator that uses g_slice |
254 | // a STL-compatible allocator that uses g_slice |
… | |
… | |
249 | { |
269 | { |
250 | typedef slice_allocator<U> other; |
270 | typedef slice_allocator<U> other; |
251 | }; |
271 | }; |
252 | |
272 | |
253 | slice_allocator () throw () { } |
273 | slice_allocator () throw () { } |
254 | slice_allocator (const slice_allocator &o) throw () { } |
274 | slice_allocator (const slice_allocator &) throw () { } |
255 | template<typename Tp2> |
275 | template<typename Tp2> |
256 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
276 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
257 | |
277 | |
258 | ~slice_allocator () { } |
278 | ~slice_allocator () { } |
259 | |
279 | |
… | |
… | |
268 | void deallocate (pointer p, size_type n) |
288 | void deallocate (pointer p, size_type n) |
269 | { |
289 | { |
270 | sfree<Tp> (p, n); |
290 | sfree<Tp> (p, n); |
271 | } |
291 | } |
272 | |
292 | |
273 | size_type max_size ()const throw () |
293 | size_type max_size () const throw () |
274 | { |
294 | { |
275 | return size_t (-1) / sizeof (Tp); |
295 | return size_t (-1) / sizeof (Tp); |
276 | } |
296 | } |
277 | |
297 | |
278 | void construct (pointer p, const Tp &val) |
298 | void construct (pointer p, const Tp &val) |
… | |
… | |
333 | |
353 | |
334 | typedef tausworthe_random_generator rand_gen; |
354 | typedef tausworthe_random_generator rand_gen; |
335 | |
355 | |
336 | extern rand_gen rndm; |
356 | extern rand_gen rndm; |
337 | |
357 | |
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358 | INTERFACE_CLASS (attachable) |
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359 | struct refcnt_base |
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360 | { |
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361 | typedef int refcnt_t; |
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362 | mutable refcnt_t ACC (RW, refcnt); |
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363 | |
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364 | MTH void refcnt_inc () const { ++refcnt; } |
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365 | MTH void refcnt_dec () const { --refcnt; } |
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366 | |
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367 | refcnt_base () : refcnt (0) { } |
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368 | }; |
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369 | |
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370 | // to avoid branches with more advanced compilers |
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371 | extern refcnt_base::refcnt_t refcnt_dummy; |
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372 | |
338 | template<class T> |
373 | template<class T> |
339 | struct refptr |
374 | struct refptr |
340 | { |
375 | { |
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376 | // p if not null |
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377 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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378 | |
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379 | void refcnt_dec () |
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380 | { |
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381 | if (!is_constant (p)) |
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382 | --*refcnt_ref (); |
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383 | else if (p) |
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384 | --p->refcnt; |
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385 | } |
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386 | |
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387 | void refcnt_inc () |
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388 | { |
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389 | if (!is_constant (p)) |
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390 | ++*refcnt_ref (); |
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391 | else if (p) |
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392 | ++p->refcnt; |
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393 | } |
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394 | |
341 | T *p; |
395 | T *p; |
342 | |
396 | |
343 | refptr () : p(0) { } |
397 | refptr () : p(0) { } |
344 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
398 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
345 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
399 | refptr (T *p) : p(p) { refcnt_inc (); } |
346 | ~refptr () { if (p) p->refcnt_dec (); } |
400 | ~refptr () { refcnt_dec (); } |
347 | |
401 | |
348 | const refptr<T> &operator =(T *o) |
402 | const refptr<T> &operator =(T *o) |
349 | { |
403 | { |
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404 | // if decrementing ever destroys we need to reverse the order here |
350 | if (p) p->refcnt_dec (); |
405 | refcnt_dec (); |
351 | p = o; |
406 | p = o; |
352 | if (p) p->refcnt_inc (); |
407 | refcnt_inc (); |
353 | |
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354 | return *this; |
408 | return *this; |
355 | } |
409 | } |
356 | |
410 | |
357 | const refptr<T> &operator =(const refptr<T> o) |
411 | const refptr<T> &operator =(const refptr<T> &o) |
358 | { |
412 | { |
359 | *this = o.p; |
413 | *this = o.p; |
360 | return *this; |
414 | return *this; |
361 | } |
415 | } |
362 | |
416 | |
363 | T &operator * () const { return *p; } |
417 | T &operator * () const { return *p; } |
364 | T *operator ->() const { return p; } |
418 | T *operator ->() const { return p; } |
365 | |
419 | |
366 | operator T *() const { return p; } |
420 | operator T *() const { return p; } |
367 | }; |
421 | }; |
368 | |
422 | |
369 | typedef refptr<maptile> maptile_ptr; |
423 | typedef refptr<maptile> maptile_ptr; |
… | |
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506 | assign ((char *)&dst, src, N); |
560 | assign ((char *)&dst, src, N); |
507 | } |
561 | } |
508 | |
562 | |
509 | typedef double tstamp; |
563 | typedef double tstamp; |
510 | |
564 | |
511 | // return current time as timestampe |
565 | // return current time as timestamp |
512 | tstamp now (); |
566 | tstamp now (); |
513 | |
567 | |
514 | int similar_direction (int a, int b); |
568 | int similar_direction (int a, int b); |
515 | |
569 | |
516 | // like printf, but returns a std::string |
570 | // like sprintf, but returns a "static" buffer |
517 | const std::string format (const char *format, ...); |
571 | const char *format (const char *format, ...); |
518 | |
572 | |
519 | #endif |
573 | #endif |
520 | |
574 | |