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 | * |
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4 | * Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
6 | * |
6 | * Deliantra is free software: you can redistribute it and/or modify |
7 | * 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 |
8 | * 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 |
9 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | * (at your option) any later version. |
10 | * option) any later version. |
10 | * |
11 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * GNU General Public License for more details. |
15 | * |
16 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * 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/>. |
18 | * and the GNU General Public License along with this program. If not, see |
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19 | * <http://www.gnu.org/licenses/>. |
18 | * |
20 | * |
19 | * The authors can be reached via e-mail to <support@deliantra.net> |
21 | * The authors can be reached via e-mail to <support@deliantra.net> |
20 | */ |
22 | */ |
21 | |
23 | |
22 | #ifndef UTIL_H__ |
24 | #ifndef UTIL_H__ |
23 | #define UTIL_H__ |
25 | #define UTIL_H__ |
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26 | |
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27 | #include <compiler.h> |
24 | |
28 | |
25 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
29 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
26 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
30 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
27 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
31 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
28 | |
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29 | #if __GNUC__ >= 3 |
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30 | # define is_constant(c) __builtin_constant_p (c) |
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31 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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32 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
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33 | #else |
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34 | # define is_constant(c) 0 |
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35 | # define expect(expr,value) (expr) |
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36 | # define prefetch(addr,rw,locality) |
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37 | #endif |
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38 | |
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39 | #if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
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40 | # define decltype(x) typeof(x) |
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41 | #endif |
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42 | |
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43 | // put into ifs if you are very sure that the expression |
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44 | // is mostly true or mosty false. note that these return |
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45 | // booleans, not the expression. |
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46 | #define expect_false(expr) expect ((expr) != 0, 0) |
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47 | #define expect_true(expr) expect ((expr) != 0, 1) |
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48 | |
32 | |
49 | #include <pthread.h> |
33 | #include <pthread.h> |
50 | |
34 | |
51 | #include <cstddef> |
35 | #include <cstddef> |
52 | #include <cmath> |
36 | #include <cmath> |
… | |
… | |
72 | #endif |
56 | #endif |
73 | |
57 | |
74 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
58 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | #define auto(var,expr) decltype(expr) var = (expr) |
76 | |
60 | |
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61 | #if cplusplus_does_not_suck /* still sucks in codesize with gcc 6, although local types work now */ |
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62 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
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63 | template<typename T, int N> |
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64 | static inline int array_length (const T (&arr)[N]) |
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65 | { |
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66 | return N; |
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67 | } |
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68 | #else |
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69 | #define array_length(name) (sizeof (name) / sizeof (name [0])) |
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70 | #endif |
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71 | |
77 | // very ugly macro that basically declares and initialises a variable |
72 | // very ugly macro that basically declares and initialises a variable |
78 | // that is in scope for the next statement only |
73 | // that is in scope for the next statement only |
79 | // works only for stuff that can be assigned 0 and converts to false |
74 | // works only for stuff that can be assigned 0 and converts to false |
80 | // (note: works great for pointers) |
75 | // (note: works great for pointers) |
81 | // most ugly macro I ever wrote |
76 | // most ugly macro I ever wrote |
… | |
… | |
87 | |
82 | |
88 | // in range excluding end |
83 | // in range excluding end |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
84 | #define IN_RANGE_EXC(val,beg,end) \ |
90 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
85 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
91 | |
86 | |
92 | void cleanup (const char *cause, bool make_core = false); |
87 | ecb_cold void cleanup (const char *cause, bool make_core = false); |
93 | void fork_abort (const char *msg); |
88 | ecb_cold void fork_abort (const char *msg); |
94 | |
89 | |
95 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
90 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
96 | // as a is often a constant while b is the variable. it is still a bug, though. |
91 | // as a is often a constant while b is the variable. it is still a bug, though. |
97 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
92 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
98 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
93 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
99 | 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; } |
94 | 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; } |
100 | |
95 | |
101 | 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 min_it (T &v, U m) { v = min (v, (T)m); } |
102 | 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> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
103 | 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 | 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); } |
… | |
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110 | // sign returns -1 or +1 |
105 | // sign returns -1 or +1 |
111 | template<typename T> |
106 | template<typename T> |
112 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
107 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
113 | // relies on 2c representation |
108 | // relies on 2c representation |
114 | template<> |
109 | template<> |
115 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
110 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
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111 | template<> |
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112 | inline sint16 sign (sint16 v) { return 1 - (sint16 (uint16 (v) >> 15) * 2); } |
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113 | template<> |
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114 | inline sint32 sign (sint32 v) { return 1 - (sint32 (uint32 (v) >> 31) * 2); } |
116 | |
115 | |
117 | // sign0 returns -1, 0 or +1 |
116 | // sign0 returns -1, 0 or +1 |
118 | template<typename T> |
117 | template<typename T> |
119 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
118 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
120 | |
119 | |
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120 | //clashes with C++0x |
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121 | template<typename T, typename U> |
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122 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
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123 | |
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124 | // div* only work correctly for div > 0 |
121 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
125 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
122 | template<typename T> static inline T div (T val, T div) { return (val + div / 2) / div; } |
126 | template<typename T> static inline T div (T val, T div) |
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127 | { |
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128 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
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129 | } |
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130 | |
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131 | template<> inline float div (float val, float div) { return val / div; } |
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132 | template<> inline double div (double val, double div) { return val / div; } |
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133 | |
123 | // div, round-up |
134 | // div, round-up |
124 | template<typename T> static inline T div_ru (T val, T div) { return (val + div - 1) / div; } |
135 | template<typename T> static inline T div_ru (T val, T div) |
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136 | { |
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137 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
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138 | } |
125 | // div, round-down |
139 | // div, round-down |
126 | template<typename T> static inline T div_rd (T val, T div) { return (val ) / div; } |
140 | template<typename T> static inline T div_rd (T val, T div) |
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141 | { |
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142 | return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div; |
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143 | } |
127 | |
144 | |
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145 | // lerp* only work correctly for min_in < max_in |
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146 | // Linear intERPolate, scales val from min_in..max_in to min_out..max_out |
128 | template<typename T> |
147 | template<typename T> |
129 | static inline T |
148 | static inline T |
130 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
149 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
131 | { |
150 | { |
132 | return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
151 | return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
… | |
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191 | int32_t d = b - a; |
210 | int32_t d = b - a; |
192 | d &= d >> 31; |
211 | d &= d >> 31; |
193 | return b - d; |
212 | return b - d; |
194 | } |
213 | } |
195 | |
214 | |
196 | // this is much faster than crossfires original algorithm |
215 | // this is much faster than crossfire's original algorithm |
197 | // on modern cpus |
216 | // on modern cpus |
198 | inline int |
217 | inline int |
199 | isqrt (int n) |
218 | isqrt (int n) |
200 | { |
219 | { |
201 | return (int)sqrtf ((float)n); |
220 | return (int)sqrtf ((float)n); |
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221 | } |
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222 | |
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223 | // this is kind of like the ^^ operator, if it would exist, without sequence point. |
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224 | // more handy than it looks like, due to the implicit !! done on its arguments |
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225 | inline bool |
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226 | logical_xor (bool a, bool b) |
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227 | { |
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228 | return a != b; |
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229 | } |
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230 | |
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231 | inline bool |
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232 | logical_implies (bool a, bool b) |
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233 | { |
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234 | return a <= b; |
202 | } |
235 | } |
203 | |
236 | |
204 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
237 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
205 | #if 0 |
238 | #if 0 |
206 | // and has a max. error of 6 in the range -100..+100. |
239 | // and has a max. error of 6 in the range -100..+100. |
207 | #else |
240 | #else |
208 | // and has a max. error of 9 in the range -100..+100. |
241 | // and has a max. error of 9 in the range -100..+100. |
209 | #endif |
242 | #endif |
210 | inline int |
243 | inline int |
211 | idistance (int dx, int dy) |
244 | idistance (int dx, int dy) |
212 | { |
245 | { |
213 | unsigned int dx_ = abs (dx); |
246 | unsigned int dx_ = abs (dx); |
214 | unsigned int dy_ = abs (dy); |
247 | unsigned int dy_ = abs (dy); |
215 | |
248 | |
216 | #if 0 |
249 | #if 0 |
217 | return dx_ > dy_ |
250 | return dx_ > dy_ |
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220 | #else |
253 | #else |
221 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
254 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
222 | #endif |
255 | #endif |
223 | } |
256 | } |
224 | |
257 | |
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258 | // can be substantially faster than floor, if your value range allows for it |
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259 | template<typename T> |
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260 | inline T |
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261 | fastfloor (T x) |
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262 | { |
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263 | return std::floor (x); |
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264 | } |
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265 | |
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266 | inline float |
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267 | fastfloor (float x) |
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268 | { |
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269 | return sint32(x) - (x < 0); |
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270 | } |
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271 | |
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272 | inline double |
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273 | fastfloor (double x) |
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274 | { |
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275 | return sint64(x) - (x < 0); |
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276 | } |
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277 | |
225 | /* |
278 | /* |
226 | * absdir(int): Returns a number between 1 and 8, which represent |
279 | * absdir(int): Returns a number between 1 and 8, which represent |
227 | * the "absolute" direction of a number (it actually takes care of |
280 | * the "absolute" direction of a number (it actually takes care of |
228 | * "overflow" in previous calculations of a direction). |
281 | * "overflow" in previous calculations of a direction). |
229 | */ |
282 | */ |
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231 | absdir (int d) |
284 | absdir (int d) |
232 | { |
285 | { |
233 | return ((d - 1) & 7) + 1; |
286 | return ((d - 1) & 7) + 1; |
234 | } |
287 | } |
235 | |
288 | |
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289 | #define for_all_bits_sparse_32(mask, idxvar) \ |
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290 | for (uint32_t idxvar, mask_ = mask; \ |
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291 | mask_ && ((idxvar = ecb_ctz32 (mask_)), mask_ &= ~(1 << idxvar), 1);) |
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292 | |
236 | extern ssize_t slice_alloc; // statistics |
293 | extern ssize_t slice_alloc; // statistics |
237 | |
294 | |
238 | void *salloc_ (int n) throw (std::bad_alloc); |
295 | void *salloc_ (int n); |
239 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
296 | void *salloc_ (int n, void *src); |
240 | |
297 | |
241 | // strictly the same as g_slice_alloc, but never returns 0 |
298 | // strictly the same as g_slice_alloc, but never returns 0 |
242 | template<typename T> |
299 | template<typename T> |
243 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
300 | inline T *salloc (int n = 1) { return (T *)salloc_ (n * sizeof (T)); } |
244 | |
301 | |
245 | // also copies src into the new area, like "memdup" |
302 | // also copies src into the new area, like "memdup" |
246 | // if src is 0, clears the memory |
303 | // if src is 0, clears the memory |
247 | template<typename T> |
304 | template<typename T> |
248 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
305 | inline T *salloc (int n, T *src) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
249 | |
306 | |
250 | // clears the memory |
307 | // clears the memory |
251 | template<typename T> |
308 | template<typename T> |
252 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
309 | inline T *salloc0(int n = 1) { return (T *)salloc_ (n * sizeof (T), 0); } |
253 | |
310 | |
254 | // for symmetry |
311 | // for symmetry |
255 | template<typename T> |
312 | template<typename T> |
256 | inline void sfree (T *ptr, int n = 1) throw () |
313 | inline void sfree (T *ptr, int n = 1) noexcept |
257 | { |
314 | { |
258 | if (expect_true (ptr)) |
315 | if (expect_true (ptr)) |
259 | { |
316 | { |
260 | slice_alloc -= n * sizeof (T); |
317 | slice_alloc -= n * sizeof (T); |
261 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
318 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
262 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
319 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
263 | assert (slice_alloc >= 0);//D |
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264 | } |
320 | } |
265 | } |
321 | } |
266 | |
322 | |
267 | // nulls the pointer |
323 | // nulls the pointer |
268 | template<typename T> |
324 | template<typename T> |
269 | inline void sfree0 (T *&ptr, int n = 1) throw () |
325 | inline void sfree0 (T *&ptr, int n = 1) noexcept |
270 | { |
326 | { |
271 | sfree<T> (ptr, n); |
327 | sfree<T> (ptr, n); |
272 | ptr = 0; |
328 | ptr = 0; |
273 | } |
329 | } |
274 | |
330 | |
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… | |
342 | typedef const Tp *const_pointer; |
398 | typedef const Tp *const_pointer; |
343 | typedef Tp &reference; |
399 | typedef Tp &reference; |
344 | typedef const Tp &const_reference; |
400 | typedef const Tp &const_reference; |
345 | typedef Tp value_type; |
401 | typedef Tp value_type; |
346 | |
402 | |
347 | template <class U> |
403 | template <class U> |
348 | struct rebind |
404 | struct rebind |
349 | { |
405 | { |
350 | typedef slice_allocator<U> other; |
406 | typedef slice_allocator<U> other; |
351 | }; |
407 | }; |
352 | |
408 | |
353 | slice_allocator () throw () { } |
409 | slice_allocator () noexcept { } |
354 | slice_allocator (const slice_allocator &) throw () { } |
410 | slice_allocator (const slice_allocator &) noexcept { } |
355 | template<typename Tp2> |
411 | template<typename Tp2> |
356 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
412 | slice_allocator (const slice_allocator<Tp2> &) noexcept { } |
357 | |
413 | |
358 | ~slice_allocator () { } |
414 | ~slice_allocator () { } |
359 | |
415 | |
360 | pointer address (reference x) const { return &x; } |
416 | pointer address (reference x) const { return &x; } |
361 | const_pointer address (const_reference x) const { return &x; } |
417 | const_pointer address (const_reference x) const { return &x; } |
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368 | void deallocate (pointer p, size_type n) |
424 | void deallocate (pointer p, size_type n) |
369 | { |
425 | { |
370 | sfree<Tp> (p, n); |
426 | sfree<Tp> (p, n); |
371 | } |
427 | } |
372 | |
428 | |
373 | size_type max_size () const throw () |
429 | size_type max_size () const noexcept |
374 | { |
430 | { |
375 | return size_t (-1) / sizeof (Tp); |
431 | return size_t (-1) / sizeof (Tp); |
376 | } |
432 | } |
377 | |
433 | |
378 | void construct (pointer p, const Tp &val) |
434 | void construct (pointer p, const Tp &val) |
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384 | { |
440 | { |
385 | p->~Tp (); |
441 | p->~Tp (); |
386 | } |
442 | } |
387 | }; |
443 | }; |
388 | |
444 | |
389 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
445 | // basically a memory area, but refcounted |
390 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
446 | struct refcnt_buf |
391 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
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392 | struct tausworthe_random_generator |
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393 | { |
447 | { |
394 | // generator |
448 | char *data; |
395 | uint32_t state [4]; |
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396 | |
449 | |
397 | void operator =(const tausworthe_random_generator &src) |
450 | refcnt_buf (size_t size = 0); |
398 | { |
451 | refcnt_buf (void *data, size_t size); |
399 | state [0] = src.state [0]; |
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400 | state [1] = src.state [1]; |
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401 | state [2] = src.state [2]; |
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402 | state [3] = src.state [3]; |
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403 | } |
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404 | |
452 | |
405 | void seed (uint32_t seed); |
453 | refcnt_buf (const refcnt_buf &src) |
406 | uint32_t next (); |
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407 | |
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408 | // uniform distribution, 0 .. max (0, num - 1) |
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409 | uint32_t operator ()(uint32_t num) |
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|
410 | { |
454 | { |
411 | return is_constant (num) |
455 | data = src.data; |
412 | ? (next () * (uint64_t)num) >> 32U |
456 | inc (); |
413 | : get_range (num); |
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|
414 | } |
457 | } |
415 | |
458 | |
416 | // return a number within (min .. max) |
459 | ~refcnt_buf (); |
417 | int operator () (int r_min, int r_max) |
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|
418 | { |
|
|
419 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
|
|
420 | ? r_min + operator ()(r_max - r_min + 1) |
|
|
421 | : get_range (r_min, r_max); |
|
|
422 | } |
|
|
423 | |
460 | |
424 | double operator ()() |
461 | refcnt_buf &operator =(const refcnt_buf &src); |
|
|
462 | |
|
|
463 | operator char *() |
425 | { |
464 | { |
426 | return this->next () / (double)0xFFFFFFFFU; |
465 | return data; |
|
|
466 | } |
|
|
467 | |
|
|
468 | size_t size () const |
|
|
469 | { |
|
|
470 | return _size (); |
427 | } |
471 | } |
428 | |
472 | |
429 | protected: |
473 | protected: |
430 | uint32_t get_range (uint32_t r_max); |
474 | enum { |
431 | int get_range (int r_min, int r_max); |
475 | overhead = sizeof (uint32_t) * 2 |
432 | }; |
476 | }; |
433 | |
477 | |
434 | typedef tausworthe_random_generator rand_gen; |
478 | uint32_t &_size () const |
|
|
479 | { |
|
|
480 | return ((unsigned int *)data)[-2]; |
|
|
481 | } |
435 | |
482 | |
436 | extern rand_gen rndm, rmg_rndm; |
483 | uint32_t &_refcnt () const |
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|
484 | { |
|
|
485 | return ((unsigned int *)data)[-1]; |
|
|
486 | } |
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|
487 | |
|
|
488 | void _alloc (uint32_t size) |
|
|
489 | { |
|
|
490 | data = ((char *)salloc<char> (size + overhead)) + overhead; |
|
|
491 | _size () = size; |
|
|
492 | _refcnt () = 1; |
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|
493 | } |
|
|
494 | |
|
|
495 | void _dealloc (); |
|
|
496 | |
|
|
497 | void inc () |
|
|
498 | { |
|
|
499 | ++_refcnt (); |
|
|
500 | } |
|
|
501 | |
|
|
502 | void dec () |
|
|
503 | { |
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|
504 | if (!--_refcnt ()) |
|
|
505 | _dealloc (); |
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|
506 | } |
|
|
507 | }; |
437 | |
508 | |
438 | INTERFACE_CLASS (attachable) |
509 | INTERFACE_CLASS (attachable) |
439 | struct refcnt_base |
510 | struct refcnt_base |
440 | { |
511 | { |
441 | typedef int refcnt_t; |
512 | typedef int refcnt_t; |
… | |
… | |
456 | // p if not null |
527 | // p if not null |
457 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
528 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
458 | |
529 | |
459 | void refcnt_dec () |
530 | void refcnt_dec () |
460 | { |
531 | { |
461 | if (!is_constant (p)) |
532 | if (!ecb_is_constant (p)) |
462 | --*refcnt_ref (); |
533 | --*refcnt_ref (); |
463 | else if (p) |
534 | else if (p) |
464 | --p->refcnt; |
535 | --p->refcnt; |
465 | } |
536 | } |
466 | |
537 | |
467 | void refcnt_inc () |
538 | void refcnt_inc () |
468 | { |
539 | { |
469 | if (!is_constant (p)) |
540 | if (!ecb_is_constant (p)) |
470 | ++*refcnt_ref (); |
541 | ++*refcnt_ref (); |
471 | else if (p) |
542 | else if (p) |
472 | ++p->refcnt; |
543 | ++p->refcnt; |
473 | } |
544 | } |
474 | |
545 | |
… | |
… | |
503 | typedef refptr<maptile> maptile_ptr; |
574 | typedef refptr<maptile> maptile_ptr; |
504 | typedef refptr<object> object_ptr; |
575 | typedef refptr<object> object_ptr; |
505 | typedef refptr<archetype> arch_ptr; |
576 | typedef refptr<archetype> arch_ptr; |
506 | typedef refptr<client> client_ptr; |
577 | typedef refptr<client> client_ptr; |
507 | typedef refptr<player> player_ptr; |
578 | typedef refptr<player> player_ptr; |
|
|
579 | typedef refptr<region> region_ptr; |
|
|
580 | |
|
|
581 | #define STRHSH_NULL 2166136261 |
|
|
582 | |
|
|
583 | static inline uint32_t |
|
|
584 | strhsh (const char *s) |
|
|
585 | { |
|
|
586 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
|
|
587 | // it is about twice as fast as the one-at-a-time one, |
|
|
588 | // with good distribution. |
|
|
589 | // FNV-1a is faster on many cpus because the multiplication |
|
|
590 | // runs concurrently with the looping logic. |
|
|
591 | // we modify the hash a bit to improve its distribution |
|
|
592 | uint32_t hash = STRHSH_NULL; |
|
|
593 | |
|
|
594 | while (*s) |
|
|
595 | hash = (hash ^ *s++) * 16777619U; |
|
|
596 | |
|
|
597 | return hash ^ (hash >> 16); |
|
|
598 | } |
|
|
599 | |
|
|
600 | static inline uint32_t |
|
|
601 | memhsh (const char *s, size_t len) |
|
|
602 | { |
|
|
603 | uint32_t hash = STRHSH_NULL; |
|
|
604 | |
|
|
605 | while (len--) |
|
|
606 | hash = (hash ^ *s++) * 16777619U; |
|
|
607 | |
|
|
608 | return hash; |
|
|
609 | } |
508 | |
610 | |
509 | struct str_hash |
611 | struct str_hash |
510 | { |
612 | { |
511 | std::size_t operator ()(const char *s) const |
613 | std::size_t operator ()(const char *s) const |
512 | { |
614 | { |
513 | unsigned long hash = 0; |
|
|
514 | |
|
|
515 | /* use the one-at-a-time hash function, which supposedly is |
|
|
516 | * better than the djb2-like one used by perl5.005, but |
|
|
517 | * certainly is better then the bug used here before. |
|
|
518 | * see http://burtleburtle.net/bob/hash/doobs.html |
|
|
519 | */ |
|
|
520 | while (*s) |
|
|
521 | { |
|
|
522 | hash += *s++; |
|
|
523 | hash += hash << 10; |
|
|
524 | hash ^= hash >> 6; |
|
|
525 | } |
|
|
526 | |
|
|
527 | hash += hash << 3; |
|
|
528 | hash ^= hash >> 11; |
|
|
529 | hash += hash << 15; |
|
|
530 | |
|
|
531 | return hash; |
615 | return strhsh (s); |
|
|
616 | } |
|
|
617 | |
|
|
618 | std::size_t operator ()(const shstr &s) const |
|
|
619 | { |
|
|
620 | return strhsh (s); |
532 | } |
621 | } |
533 | }; |
622 | }; |
534 | |
623 | |
535 | struct str_equal |
624 | struct str_equal |
536 | { |
625 | { |
… | |
… | |
563 | } |
652 | } |
564 | }; |
653 | }; |
565 | |
654 | |
566 | // This container blends advantages of linked lists |
655 | // This container blends advantages of linked lists |
567 | // (efficiency) with vectors (random access) by |
656 | // (efficiency) with vectors (random access) by |
568 | // by using an unordered vector and storing the vector |
657 | // using an unordered vector and storing the vector |
569 | // index inside the object. |
658 | // index inside the object. |
570 | // |
659 | // |
571 | // + memory-efficient on most 64 bit archs |
660 | // + memory-efficient on most 64 bit archs |
572 | // + O(1) insert/remove |
661 | // + O(1) insert/remove |
573 | // + free unique (but varying) id for inserted objects |
662 | // + free unique (but varying) id for inserted objects |
… | |
… | |
610 | insert (&obj); |
699 | insert (&obj); |
611 | } |
700 | } |
612 | |
701 | |
613 | void erase (T *obj) |
702 | void erase (T *obj) |
614 | { |
703 | { |
615 | unsigned int pos = obj->*indexmember; |
704 | object_vector_index pos = obj->*indexmember; |
616 | obj->*indexmember = 0; |
705 | obj->*indexmember = 0; |
617 | |
706 | |
618 | if (pos < this->size ()) |
707 | if (pos < this->size ()) |
619 | { |
708 | { |
620 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
709 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
… | |
… | |
628 | { |
717 | { |
629 | erase (&obj); |
718 | erase (&obj); |
630 | } |
719 | } |
631 | }; |
720 | }; |
632 | |
721 | |
|
|
722 | ///////////////////////////////////////////////////////////////////////////// |
|
|
723 | |
|
|
724 | // something like a vector or stack, but without |
|
|
725 | // out of bounds checking |
|
|
726 | template<typename T> |
|
|
727 | struct fixed_stack |
|
|
728 | { |
|
|
729 | T *data; |
|
|
730 | int size; |
|
|
731 | int max; |
|
|
732 | |
|
|
733 | fixed_stack () |
|
|
734 | : size (0), data (0) |
|
|
735 | { |
|
|
736 | } |
|
|
737 | |
|
|
738 | fixed_stack (int max) |
|
|
739 | : size (0), max (max) |
|
|
740 | { |
|
|
741 | data = salloc<T> (max); |
|
|
742 | } |
|
|
743 | |
|
|
744 | void reset (int new_max) |
|
|
745 | { |
|
|
746 | sfree (data, max); |
|
|
747 | size = 0; |
|
|
748 | max = new_max; |
|
|
749 | data = salloc<T> (max); |
|
|
750 | } |
|
|
751 | |
|
|
752 | void free () |
|
|
753 | { |
|
|
754 | sfree (data, max); |
|
|
755 | data = 0; |
|
|
756 | } |
|
|
757 | |
|
|
758 | ~fixed_stack () |
|
|
759 | { |
|
|
760 | sfree (data, max); |
|
|
761 | } |
|
|
762 | |
|
|
763 | T &operator[](int idx) |
|
|
764 | { |
|
|
765 | return data [idx]; |
|
|
766 | } |
|
|
767 | |
|
|
768 | void push (T v) |
|
|
769 | { |
|
|
770 | data [size++] = v; |
|
|
771 | } |
|
|
772 | |
|
|
773 | T &pop () |
|
|
774 | { |
|
|
775 | return data [--size]; |
|
|
776 | } |
|
|
777 | |
|
|
778 | T remove (int idx) |
|
|
779 | { |
|
|
780 | T v = data [idx]; |
|
|
781 | |
|
|
782 | data [idx] = data [--size]; |
|
|
783 | |
|
|
784 | return v; |
|
|
785 | } |
|
|
786 | }; |
|
|
787 | |
|
|
788 | ///////////////////////////////////////////////////////////////////////////// |
|
|
789 | |
633 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
790 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
|
|
791 | // returns the number of bytes actually used (including \0) |
634 | void assign (char *dst, const char *src, int maxlen); |
792 | int assign (char *dst, const char *src, int maxsize); |
635 | |
793 | |
636 | // type-safe version of assign |
794 | // type-safe version of assign |
637 | template<int N> |
795 | template<int N> |
638 | inline void assign (char (&dst)[N], const char *src) |
796 | inline int assign (char (&dst)[N], const char *src) |
639 | { |
797 | { |
640 | assign ((char *)&dst, src, N); |
798 | return assign ((char *)&dst, src, N); |
641 | } |
799 | } |
642 | |
800 | |
643 | typedef double tstamp; |
801 | typedef double tstamp; |
644 | |
802 | |
645 | // return current time as timestamp |
803 | // return current time as timestamp |
646 | tstamp now (); |
804 | tstamp now (); |
647 | |
805 | |
648 | int similar_direction (int a, int b); |
806 | int similar_direction (int a, int b); |
649 | |
807 | |
650 | // like sprintf, but returns a "static" buffer |
808 | // like v?sprintf, but returns a "static" buffer |
651 | const char *format (const char *format, ...); |
809 | char *vformat (const char *format, va_list ap); |
|
|
810 | char *format (const char *format, ...) ecb_attribute ((format (printf, 1, 2))); |
|
|
811 | |
|
|
812 | // safety-check player input which will become object->msg |
|
|
813 | bool msg_is_safe (const char *msg); |
652 | |
814 | |
653 | ///////////////////////////////////////////////////////////////////////////// |
815 | ///////////////////////////////////////////////////////////////////////////// |
654 | // threads, very very thin wrappers around pthreads |
816 | // threads, very very thin wrappers around pthreads |
655 | |
817 | |
656 | struct thread |
818 | struct thread |