1 | /* |
1 | /* |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Deliantra is free software: you can redistribute it and/or modify |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | * it under the terms of the GNU General Public License as published by |
7 | * the terms of the Affero GNU General Public License as published by the |
8 | * the Free Software Foundation, either version 3 of the License, or |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | * (at your option) any later version. |
9 | * 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, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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 Affero GNU General Public License |
17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
17 | * and the GNU General Public License along with this program. If not, see |
|
|
18 | * <http://www.gnu.org/licenses/>. |
18 | * |
19 | * |
19 | * The authors can be reached via e-mail to <support@deliantra.net> |
20 | * The authors can be reached via e-mail to <support@deliantra.net> |
20 | */ |
21 | */ |
21 | |
22 | |
22 | #ifndef UTIL_H__ |
23 | #ifndef UTIL_H__ |
23 | #define UTIL_H__ |
24 | #define UTIL_H__ |
24 | |
25 | |
25 | #define DEBUG_SALLOC 0 |
26 | #include <compiler.h> |
26 | #define PREFER_MALLOC 0 |
|
|
27 | |
27 | |
28 | #if __GNUC__ >= 3 |
28 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
29 | # define is_constant(c) __builtin_constant_p (c) |
29 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
31 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
|
|
32 | #else |
|
|
33 | # define is_constant(c) 0 |
|
|
34 | # define expect(expr,value) (expr) |
|
|
35 | # define prefetch(addr,rw,locality) |
|
|
36 | #endif |
|
|
37 | |
31 | |
38 | #if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
32 | #include <pthread.h> |
39 | # define decltype(x) typeof(x) |
|
|
40 | #endif |
|
|
41 | |
|
|
42 | // put into ifs if you are very sure that the expression |
|
|
43 | // is mostly true or mosty false. note that these return |
|
|
44 | // booleans, not the expression. |
|
|
45 | #define expect_false(expr) expect ((expr) != 0, 0) |
|
|
46 | #define expect_true(expr) expect ((expr) != 0, 1) |
|
|
47 | |
33 | |
48 | #include <cstddef> |
34 | #include <cstddef> |
49 | #include <cmath> |
35 | #include <cmath> |
50 | #include <new> |
36 | #include <new> |
51 | #include <vector> |
37 | #include <vector> |
… | |
… | |
60 | # define g_slice_alloc(s) debug_slice_alloc(s) |
46 | # define g_slice_alloc(s) debug_slice_alloc(s) |
61 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
47 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
62 | void *g_slice_alloc (unsigned long size); |
48 | void *g_slice_alloc (unsigned long size); |
63 | void *g_slice_alloc0 (unsigned long size); |
49 | void *g_slice_alloc0 (unsigned long size); |
64 | void g_slice_free1 (unsigned long size, void *ptr); |
50 | void g_slice_free1 (unsigned long size, void *ptr); |
|
|
51 | #elif PREFER_MALLOC |
|
|
52 | # define g_slice_alloc0(s) calloc (1, (s)) |
|
|
53 | # define g_slice_alloc(s) malloc ((s)) |
|
|
54 | # define g_slice_free1(s,p) free ((p)) |
65 | #endif |
55 | #endif |
66 | |
56 | |
67 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
57 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
68 | #define auto(var,expr) decltype(expr) var = (expr) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
69 | |
59 | |
|
|
60 | #if cplusplus_does_not_suck |
|
|
61 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
|
|
62 | template<typename T, int N> |
|
|
63 | static inline int array_length (const T (&arr)[N]) |
|
|
64 | { |
|
|
65 | return N; |
|
|
66 | } |
|
|
67 | #else |
|
|
68 | #define array_length(name) (sizeof (name) / sizeof (name [0])) |
|
|
69 | #endif |
|
|
70 | |
70 | // very ugly macro that basicaly declares and initialises a variable |
71 | // very ugly macro that basically declares and initialises a variable |
71 | // that is in scope for the next statement only |
72 | // that is in scope for the next statement only |
72 | // works only for stuff that can be assigned 0 and converts to false |
73 | // works only for stuff that can be assigned 0 and converts to false |
73 | // (note: works great for pointers) |
74 | // (note: works great for pointers) |
74 | // most ugly macro I ever wrote |
75 | // most ugly macro I ever wrote |
75 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
76 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
… | |
… | |
80 | |
81 | |
81 | // in range excluding end |
82 | // in range excluding end |
82 | #define IN_RANGE_EXC(val,beg,end) \ |
83 | #define IN_RANGE_EXC(val,beg,end) \ |
83 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
84 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
84 | |
85 | |
|
|
86 | void cleanup (const char *cause, bool make_core = false); |
85 | void fork_abort (const char *msg); |
87 | void fork_abort (const char *msg); |
86 | |
88 | |
87 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
89 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
88 | // as a is often a constant while b is the variable. it is still a bug, though. |
90 | // as a is often a constant while b is the variable. it is still a bug, though. |
89 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
91 | template<typename T, typename U> static inline T min (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; } |
92 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
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; } |
93 | 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; } |
92 | |
94 | |
|
|
95 | template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); } |
|
|
96 | template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
|
|
97 | template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = clamp (v, (T)a, (T)b); } |
|
|
98 | |
93 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
99 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
94 | |
100 | |
95 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
101 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
96 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
102 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
97 | |
103 | |
|
|
104 | // sign returns -1 or +1 |
|
|
105 | template<typename T> |
|
|
106 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
|
|
107 | // relies on 2c representation |
|
|
108 | template<> |
|
|
109 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
|
|
110 | template<> |
|
|
111 | inline sint16 sign (sint16 v) { return 1 - (sint16 (uint16 (v) >> 15) * 2); } |
|
|
112 | template<> |
|
|
113 | inline sint32 sign (sint32 v) { return 1 - (sint32 (uint32 (v) >> 31) * 2); } |
|
|
114 | |
|
|
115 | // sign0 returns -1, 0 or +1 |
|
|
116 | template<typename T> |
|
|
117 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
|
|
118 | |
|
|
119 | //clashes with C++0x |
|
|
120 | template<typename T, typename U> |
|
|
121 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
|
|
122 | |
|
|
123 | // div* only work correctly for div > 0 |
|
|
124 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
|
|
125 | template<typename T> static inline T div (T val, T div) |
|
|
126 | { |
|
|
127 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
|
|
128 | } |
|
|
129 | |
|
|
130 | template<> inline float div (float val, float div) { return val / div; } |
|
|
131 | template<> inline double div (double val, double div) { return val / div; } |
|
|
132 | |
|
|
133 | // div, round-up |
|
|
134 | template<typename T> static inline T div_ru (T val, T div) |
|
|
135 | { |
|
|
136 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
|
|
137 | } |
|
|
138 | // div, round-down |
|
|
139 | template<typename T> static inline T div_rd (T val, T div) |
|
|
140 | { |
|
|
141 | return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div; |
|
|
142 | } |
|
|
143 | |
|
|
144 | // lerp* only work correctly for min_in < max_in |
|
|
145 | // Linear intERPolate, scales val from min_in..max_in to min_out..max_out |
98 | template<typename T> |
146 | template<typename T> |
99 | static inline T |
147 | static inline T |
100 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
148 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
101 | { |
149 | { |
102 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
150 | return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
|
|
151 | } |
|
|
152 | |
|
|
153 | // lerp, round-down |
|
|
154 | template<typename T> |
|
|
155 | static inline T |
|
|
156 | lerp_rd (T val, T min_in, T max_in, T min_out, T max_out) |
|
|
157 | { |
|
|
158 | return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
|
|
159 | } |
|
|
160 | |
|
|
161 | // lerp, round-up |
|
|
162 | template<typename T> |
|
|
163 | static inline T |
|
|
164 | lerp_ru (T val, T min_in, T max_in, T min_out, T max_out) |
|
|
165 | { |
|
|
166 | return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
103 | } |
167 | } |
104 | |
168 | |
105 | // lots of stuff taken from FXT |
169 | // lots of stuff taken from FXT |
106 | |
170 | |
107 | /* Rotate right. This is used in various places for checksumming */ |
171 | /* Rotate right. This is used in various places for checksumming */ |
… | |
… | |
145 | int32_t d = b - a; |
209 | int32_t d = b - a; |
146 | d &= d >> 31; |
210 | d &= d >> 31; |
147 | return b - d; |
211 | return b - d; |
148 | } |
212 | } |
149 | |
213 | |
150 | // this is much faster than crossfires original algorithm |
214 | // this is much faster than crossfire's original algorithm |
151 | // on modern cpus |
215 | // on modern cpus |
152 | inline int |
216 | inline int |
153 | isqrt (int n) |
217 | isqrt (int n) |
154 | { |
218 | { |
155 | return (int)sqrtf ((float)n); |
219 | return (int)sqrtf ((float)n); |
|
|
220 | } |
|
|
221 | |
|
|
222 | // this is kind of like the ^^ operator, if it would exist, without sequence point. |
|
|
223 | // more handy than it looks like, due to the implicit !! done on its arguments |
|
|
224 | inline bool |
|
|
225 | logical_xor (bool a, bool b) |
|
|
226 | { |
|
|
227 | return a != b; |
|
|
228 | } |
|
|
229 | |
|
|
230 | inline bool |
|
|
231 | logical_implies (bool a, bool b) |
|
|
232 | { |
|
|
233 | return a <= b; |
156 | } |
234 | } |
157 | |
235 | |
158 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
236 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
159 | #if 0 |
237 | #if 0 |
160 | // and has a max. error of 6 in the range -100..+100. |
238 | // and has a max. error of 6 in the range -100..+100. |
… | |
… | |
185 | absdir (int d) |
263 | absdir (int d) |
186 | { |
264 | { |
187 | return ((d - 1) & 7) + 1; |
265 | return ((d - 1) & 7) + 1; |
188 | } |
266 | } |
189 | |
267 | |
|
|
268 | // avoid ctz name because netbsd or freebsd spams it's namespace with it |
|
|
269 | #if GCC_VERSION(3,4) |
|
|
270 | static inline int least_significant_bit (uint32_t x) |
|
|
271 | { |
|
|
272 | return __builtin_ctz (x); |
|
|
273 | } |
|
|
274 | #else |
|
|
275 | int least_significant_bit (uint32_t x); |
|
|
276 | #endif |
|
|
277 | |
|
|
278 | #define for_all_bits_sparse_32(mask, idxvar) \ |
|
|
279 | for (uint32_t idxvar, mask_ = mask; \ |
|
|
280 | mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);) |
|
|
281 | |
190 | extern size_t slice_alloc; // statistics |
282 | extern ssize_t slice_alloc; // statistics |
|
|
283 | |
|
|
284 | void *salloc_ (int n) throw (std::bad_alloc); |
|
|
285 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
|
|
286 | |
|
|
287 | // strictly the same as g_slice_alloc, but never returns 0 |
|
|
288 | template<typename T> |
|
|
289 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
|
|
290 | |
|
|
291 | // also copies src into the new area, like "memdup" |
|
|
292 | // if src is 0, clears the memory |
|
|
293 | template<typename T> |
|
|
294 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
|
|
295 | |
|
|
296 | // clears the memory |
|
|
297 | template<typename T> |
|
|
298 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
|
|
299 | |
|
|
300 | // for symmetry |
|
|
301 | template<typename T> |
|
|
302 | inline void sfree (T *ptr, int n = 1) throw () |
|
|
303 | { |
|
|
304 | if (expect_true (ptr)) |
|
|
305 | { |
|
|
306 | slice_alloc -= n * sizeof (T); |
|
|
307 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
|
|
308 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
|
|
309 | assert (slice_alloc >= 0);//D |
|
|
310 | } |
|
|
311 | } |
|
|
312 | |
|
|
313 | // nulls the pointer |
|
|
314 | template<typename T> |
|
|
315 | inline void sfree0 (T *&ptr, int n = 1) throw () |
|
|
316 | { |
|
|
317 | sfree<T> (ptr, n); |
|
|
318 | ptr = 0; |
|
|
319 | } |
191 | |
320 | |
192 | // makes dynamically allocated objects zero-initialised |
321 | // makes dynamically allocated objects zero-initialised |
193 | struct zero_initialised |
322 | struct zero_initialised |
194 | { |
323 | { |
195 | void *operator new (size_t s, void *p) |
324 | void *operator new (size_t s, void *p) |
… | |
… | |
198 | return p; |
327 | return p; |
199 | } |
328 | } |
200 | |
329 | |
201 | void *operator new (size_t s) |
330 | void *operator new (size_t s) |
202 | { |
331 | { |
203 | slice_alloc += s; |
|
|
204 | return g_slice_alloc0 (s); |
332 | return salloc0<char> (s); |
205 | } |
333 | } |
206 | |
334 | |
207 | void *operator new[] (size_t s) |
335 | void *operator new[] (size_t s) |
208 | { |
336 | { |
209 | slice_alloc += s; |
|
|
210 | return g_slice_alloc0 (s); |
337 | return salloc0<char> (s); |
211 | } |
338 | } |
212 | |
339 | |
213 | void operator delete (void *p, size_t s) |
340 | void operator delete (void *p, size_t s) |
214 | { |
341 | { |
215 | slice_alloc -= s; |
342 | sfree ((char *)p, s); |
216 | g_slice_free1 (s, p); |
|
|
217 | } |
343 | } |
218 | |
344 | |
219 | void operator delete[] (void *p, size_t s) |
345 | void operator delete[] (void *p, size_t s) |
220 | { |
346 | { |
221 | slice_alloc -= s; |
347 | sfree ((char *)p, s); |
222 | g_slice_free1 (s, p); |
|
|
223 | } |
348 | } |
224 | }; |
349 | }; |
225 | |
350 | |
226 | void *salloc_ (int n) throw (std::bad_alloc); |
351 | // makes dynamically allocated objects zero-initialised |
227 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
352 | struct slice_allocated |
228 | |
|
|
229 | // strictly the same as g_slice_alloc, but never returns 0 |
|
|
230 | template<typename T> |
|
|
231 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
|
|
232 | |
|
|
233 | // also copies src into the new area, like "memdup" |
|
|
234 | // if src is 0, clears the memory |
|
|
235 | template<typename T> |
|
|
236 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
|
|
237 | |
|
|
238 | // clears the memory |
|
|
239 | template<typename T> |
|
|
240 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
|
|
241 | |
|
|
242 | // for symmetry |
|
|
243 | template<typename T> |
|
|
244 | inline void sfree (T *ptr, int n = 1) throw () |
|
|
245 | { |
353 | { |
246 | #if PREFER_MALLOC |
354 | void *operator new (size_t s, void *p) |
247 | free (ptr); |
355 | { |
248 | #else |
356 | return p; |
249 | slice_alloc -= n * sizeof (T); |
357 | } |
250 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
358 | |
251 | #endif |
359 | void *operator new (size_t s) |
252 | } |
360 | { |
|
|
361 | return salloc<char> (s); |
|
|
362 | } |
|
|
363 | |
|
|
364 | void *operator new[] (size_t s) |
|
|
365 | { |
|
|
366 | return salloc<char> (s); |
|
|
367 | } |
|
|
368 | |
|
|
369 | void operator delete (void *p, size_t s) |
|
|
370 | { |
|
|
371 | sfree ((char *)p, s); |
|
|
372 | } |
|
|
373 | |
|
|
374 | void operator delete[] (void *p, size_t s) |
|
|
375 | { |
|
|
376 | sfree ((char *)p, s); |
|
|
377 | } |
|
|
378 | }; |
253 | |
379 | |
254 | // a STL-compatible allocator that uses g_slice |
380 | // a STL-compatible allocator that uses g_slice |
255 | // boy, this is verbose |
381 | // boy, this is verbose |
256 | template<typename Tp> |
382 | template<typename Tp> |
257 | struct slice_allocator |
383 | struct slice_allocator |
… | |
… | |
304 | { |
430 | { |
305 | p->~Tp (); |
431 | p->~Tp (); |
306 | } |
432 | } |
307 | }; |
433 | }; |
308 | |
434 | |
309 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
|
|
310 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
|
|
311 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
|
|
312 | struct tausworthe_random_generator |
|
|
313 | { |
|
|
314 | // generator |
|
|
315 | uint32_t state [4]; |
|
|
316 | |
|
|
317 | void operator =(const tausworthe_random_generator &src) |
|
|
318 | { |
|
|
319 | state [0] = src.state [0]; |
|
|
320 | state [1] = src.state [1]; |
|
|
321 | state [2] = src.state [2]; |
|
|
322 | state [3] = src.state [3]; |
|
|
323 | } |
|
|
324 | |
|
|
325 | void seed (uint32_t seed); |
|
|
326 | uint32_t next (); |
|
|
327 | |
|
|
328 | // uniform distribution |
|
|
329 | uint32_t operator ()(uint32_t num) |
|
|
330 | { |
|
|
331 | return is_constant (num) |
|
|
332 | ? (next () * (uint64_t)num) >> 32U |
|
|
333 | : get_range (num); |
|
|
334 | } |
|
|
335 | |
|
|
336 | // return a number within (min .. max) |
|
|
337 | int operator () (int r_min, int r_max) |
|
|
338 | { |
|
|
339 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
|
|
340 | ? r_min + operator ()(r_max - r_min + 1) |
|
|
341 | : get_range (r_min, r_max); |
|
|
342 | } |
|
|
343 | |
|
|
344 | double operator ()() |
|
|
345 | { |
|
|
346 | return this->next () / (double)0xFFFFFFFFU; |
|
|
347 | } |
|
|
348 | |
|
|
349 | protected: |
|
|
350 | uint32_t get_range (uint32_t r_max); |
|
|
351 | int get_range (int r_min, int r_max); |
|
|
352 | }; |
|
|
353 | |
|
|
354 | typedef tausworthe_random_generator rand_gen; |
|
|
355 | |
|
|
356 | extern rand_gen rndm; |
|
|
357 | |
|
|
358 | INTERFACE_CLASS (attachable) |
435 | INTERFACE_CLASS (attachable) |
359 | struct refcnt_base |
436 | struct refcnt_base |
360 | { |
437 | { |
361 | typedef int refcnt_t; |
438 | typedef int refcnt_t; |
362 | mutable refcnt_t ACC (RW, refcnt); |
439 | mutable refcnt_t ACC (RW, refcnt); |
… | |
… | |
423 | typedef refptr<maptile> maptile_ptr; |
500 | typedef refptr<maptile> maptile_ptr; |
424 | typedef refptr<object> object_ptr; |
501 | typedef refptr<object> object_ptr; |
425 | typedef refptr<archetype> arch_ptr; |
502 | typedef refptr<archetype> arch_ptr; |
426 | typedef refptr<client> client_ptr; |
503 | typedef refptr<client> client_ptr; |
427 | typedef refptr<player> player_ptr; |
504 | typedef refptr<player> player_ptr; |
|
|
505 | typedef refptr<region> region_ptr; |
|
|
506 | |
|
|
507 | #define STRHSH_NULL 2166136261 |
|
|
508 | |
|
|
509 | static inline uint32_t |
|
|
510 | strhsh (const char *s) |
|
|
511 | { |
|
|
512 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
|
|
513 | // it is about twice as fast as the one-at-a-time one, |
|
|
514 | // with good distribution. |
|
|
515 | // FNV-1a is faster on many cpus because the multiplication |
|
|
516 | // runs concurrently with the looping logic. |
|
|
517 | // we modify the hash a bit to improve its distribution |
|
|
518 | uint32_t hash = STRHSH_NULL; |
|
|
519 | |
|
|
520 | while (*s) |
|
|
521 | hash = (hash ^ *s++) * 16777619U; |
|
|
522 | |
|
|
523 | return hash ^ (hash >> 16); |
|
|
524 | } |
|
|
525 | |
|
|
526 | static inline uint32_t |
|
|
527 | memhsh (const char *s, size_t len) |
|
|
528 | { |
|
|
529 | uint32_t hash = STRHSH_NULL; |
|
|
530 | |
|
|
531 | while (len--) |
|
|
532 | hash = (hash ^ *s++) * 16777619U; |
|
|
533 | |
|
|
534 | return hash; |
|
|
535 | } |
428 | |
536 | |
429 | struct str_hash |
537 | struct str_hash |
430 | { |
538 | { |
431 | std::size_t operator ()(const char *s) const |
539 | std::size_t operator ()(const char *s) const |
432 | { |
540 | { |
433 | unsigned long hash = 0; |
|
|
434 | |
|
|
435 | /* use the one-at-a-time hash function, which supposedly is |
|
|
436 | * better than the djb2-like one used by perl5.005, but |
|
|
437 | * certainly is better then the bug used here before. |
|
|
438 | * see http://burtleburtle.net/bob/hash/doobs.html |
|
|
439 | */ |
|
|
440 | while (*s) |
|
|
441 | { |
|
|
442 | hash += *s++; |
|
|
443 | hash += hash << 10; |
|
|
444 | hash ^= hash >> 6; |
|
|
445 | } |
|
|
446 | |
|
|
447 | hash += hash << 3; |
|
|
448 | hash ^= hash >> 11; |
|
|
449 | hash += hash << 15; |
|
|
450 | |
|
|
451 | return hash; |
541 | return strhsh (s); |
|
|
542 | } |
|
|
543 | |
|
|
544 | std::size_t operator ()(const shstr &s) const |
|
|
545 | { |
|
|
546 | return strhsh (s); |
452 | } |
547 | } |
453 | }; |
548 | }; |
454 | |
549 | |
455 | struct str_equal |
550 | struct str_equal |
456 | { |
551 | { |
… | |
… | |
548 | { |
643 | { |
549 | erase (&obj); |
644 | erase (&obj); |
550 | } |
645 | } |
551 | }; |
646 | }; |
552 | |
647 | |
|
|
648 | ///////////////////////////////////////////////////////////////////////////// |
|
|
649 | |
|
|
650 | // something like a vector or stack, but without |
|
|
651 | // out of bounds checking |
|
|
652 | template<typename T> |
|
|
653 | struct fixed_stack |
|
|
654 | { |
|
|
655 | T *data; |
|
|
656 | int size; |
|
|
657 | int max; |
|
|
658 | |
|
|
659 | fixed_stack () |
|
|
660 | : size (0), data (0) |
|
|
661 | { |
|
|
662 | } |
|
|
663 | |
|
|
664 | fixed_stack (int max) |
|
|
665 | : size (0), max (max) |
|
|
666 | { |
|
|
667 | data = salloc<T> (max); |
|
|
668 | } |
|
|
669 | |
|
|
670 | void reset (int new_max) |
|
|
671 | { |
|
|
672 | sfree (data, max); |
|
|
673 | size = 0; |
|
|
674 | max = new_max; |
|
|
675 | data = salloc<T> (max); |
|
|
676 | } |
|
|
677 | |
|
|
678 | void free () |
|
|
679 | { |
|
|
680 | sfree (data, max); |
|
|
681 | data = 0; |
|
|
682 | } |
|
|
683 | |
|
|
684 | ~fixed_stack () |
|
|
685 | { |
|
|
686 | sfree (data, max); |
|
|
687 | } |
|
|
688 | |
|
|
689 | T &operator[](int idx) |
|
|
690 | { |
|
|
691 | return data [idx]; |
|
|
692 | } |
|
|
693 | |
|
|
694 | void push (T v) |
|
|
695 | { |
|
|
696 | data [size++] = v; |
|
|
697 | } |
|
|
698 | |
|
|
699 | T &pop () |
|
|
700 | { |
|
|
701 | return data [--size]; |
|
|
702 | } |
|
|
703 | |
|
|
704 | T remove (int idx) |
|
|
705 | { |
|
|
706 | T v = data [idx]; |
|
|
707 | |
|
|
708 | data [idx] = data [--size]; |
|
|
709 | |
|
|
710 | return v; |
|
|
711 | } |
|
|
712 | }; |
|
|
713 | |
|
|
714 | ///////////////////////////////////////////////////////////////////////////// |
|
|
715 | |
553 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
716 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
|
|
717 | // returns the number of bytes actually used (including \0) |
554 | void assign (char *dst, const char *src, int maxlen); |
718 | int assign (char *dst, const char *src, int maxsize); |
555 | |
719 | |
556 | // type-safe version of assign |
720 | // type-safe version of assign |
557 | template<int N> |
721 | template<int N> |
558 | inline void assign (char (&dst)[N], const char *src) |
722 | inline int assign (char (&dst)[N], const char *src) |
559 | { |
723 | { |
560 | assign ((char *)&dst, src, N); |
724 | return assign ((char *)&dst, src, N); |
561 | } |
725 | } |
562 | |
726 | |
563 | typedef double tstamp; |
727 | typedef double tstamp; |
564 | |
728 | |
565 | // return current time as timestamp |
729 | // return current time as timestamp |
566 | tstamp now (); |
730 | tstamp now (); |
567 | |
731 | |
568 | int similar_direction (int a, int b); |
732 | int similar_direction (int a, int b); |
569 | |
733 | |
570 | // like sprintf, but returns a "static" buffer |
734 | // like v?sprintf, but returns a "static" buffer |
571 | const char *format (const char *format, ...); |
735 | char *vformat (const char *format, va_list ap); |
|
|
736 | char *format (const char *format, ...) attribute ((format (printf, 1, 2))); |
572 | |
737 | |
|
|
738 | // safety-check player input which will become object->msg |
|
|
739 | bool msg_is_safe (const char *msg); |
|
|
740 | |
|
|
741 | ///////////////////////////////////////////////////////////////////////////// |
|
|
742 | // threads, very very thin wrappers around pthreads |
|
|
743 | |
|
|
744 | struct thread |
|
|
745 | { |
|
|
746 | pthread_t id; |
|
|
747 | |
|
|
748 | void start (void *(*start_routine)(void *), void *arg = 0); |
|
|
749 | |
|
|
750 | void cancel () |
|
|
751 | { |
|
|
752 | pthread_cancel (id); |
|
|
753 | } |
|
|
754 | |
|
|
755 | void *join () |
|
|
756 | { |
|
|
757 | void *ret; |
|
|
758 | |
|
|
759 | if (pthread_join (id, &ret)) |
|
|
760 | cleanup ("pthread_join failed", 1); |
|
|
761 | |
|
|
762 | return ret; |
|
|
763 | } |
|
|
764 | }; |
|
|
765 | |
|
|
766 | // note that mutexes are not classes |
|
|
767 | typedef pthread_mutex_t smutex; |
|
|
768 | |
|
|
769 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
770 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
|
|
771 | #else |
|
|
772 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
573 | #endif |
773 | #endif |
574 | |
774 | |
|
|
775 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
776 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
777 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
|
|
778 | |
|
|
779 | typedef pthread_cond_t scond; |
|
|
780 | |
|
|
781 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
|
|
782 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
|
|
783 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
|
|
784 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
|
|
785 | |
|
|
786 | #endif |
|
|
787 | |