| 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 (©) 2005,2006,2007,2008,2009,2010 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 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 <crossfire@schmorp.de> |
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 PREFER_MALLOC |
26 | #include <compiler.h> |
| 26 | |
27 | |
| 27 | #if __GNUC__ >= 3 |
28 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
| 28 | # define is_constant(c) __builtin_constant_p (c) |
29 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
| 29 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
30 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
| 30 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
|
|
| 31 | #else |
|
|
| 32 | # define is_constant(c) 0 |
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|
| 33 | # define expect(expr,value) (expr) |
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| 34 | # define prefetch(addr,rw,locality) |
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| 35 | #endif |
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| 36 | |
31 | |
| 37 | #if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
32 | #include <pthread.h> |
| 38 | # define decltype(x) typeof(x) |
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|
| 39 | #endif |
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| 40 | |
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| 41 | // put into ifs if you are very sure that the expression |
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|
| 42 | // is mostly true or mosty false. note that these return |
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| 43 | // booleans, not the expression. |
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| 44 | #define expect_false(expr) expect ((expr) != 0, 0) |
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| 45 | #define expect_true(expr) expect ((expr) != 0, 1) |
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|
| 46 | |
33 | |
| 47 | #include <cstddef> |
34 | #include <cstddef> |
| 48 | #include <cmath> |
35 | #include <cmath> |
| 49 | #include <new> |
36 | #include <new> |
| 50 | #include <vector> |
37 | #include <vector> |
| … | |
… | |
| 52 | #include <glib.h> |
39 | #include <glib.h> |
| 53 | |
40 | |
| 54 | #include <shstr.h> |
41 | #include <shstr.h> |
| 55 | #include <traits.h> |
42 | #include <traits.h> |
| 56 | |
43 | |
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|
44 | #if DEBUG_SALLOC |
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45 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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46 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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47 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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48 | void *g_slice_alloc (unsigned long size); |
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49 | void *g_slice_alloc0 (unsigned long size); |
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50 | void g_slice_free1 (unsigned long size, void *ptr); |
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51 | #elif PREFER_MALLOC |
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52 | # define g_slice_alloc0(s) calloc (1, (s)) |
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53 | # define g_slice_alloc(s) malloc ((s)) |
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54 | # define g_slice_free1(s,p) free ((p)) |
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55 | #endif |
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56 | |
| 57 | // 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) |
| 58 | #define auto(var,expr) decltype(expr) var = (expr) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
| 59 | |
59 | |
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60 | // could use the sizeof (arr) /( sizeof (arr [0]) here, but C++ is |
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61 | // much more obfuscated... :) |
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62 | |
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63 | template<typename T, int N> |
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64 | 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 | |
| 60 | // very ugly macro that basicaly declares and initialises a variable |
69 | // very ugly macro that basically declares and initialises a variable |
| 61 | // that is in scope for the next statement only |
70 | // that is in scope for the next statement only |
| 62 | // works only for stuff that can be assigned 0 and converts to false |
71 | // works only for stuff that can be assigned 0 and converts to false |
| 63 | // (note: works great for pointers) |
72 | // (note: works great for pointers) |
| 64 | // most ugly macro I ever wrote |
73 | // most ugly macro I ever wrote |
| 65 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
74 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
| … | |
… | |
| 70 | |
79 | |
| 71 | // in range excluding end |
80 | // in range excluding end |
| 72 | #define IN_RANGE_EXC(val,beg,end) \ |
81 | #define IN_RANGE_EXC(val,beg,end) \ |
| 73 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
82 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
| 74 | |
83 | |
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84 | void cleanup (const char *cause, bool make_core = false); |
| 75 | void fork_abort (const char *msg); |
85 | void fork_abort (const char *msg); |
| 76 | |
86 | |
| 77 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
87 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
| 78 | // as a is often a constant while b is the variable. it is still a bug, though. |
88 | // as a is often a constant while b is the variable. it is still a bug, though. |
| 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 | |
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93 | template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); } |
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94 | template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
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95 | 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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96 | |
| 83 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
97 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
| 84 | |
98 | |
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99 | 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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100 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
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101 | |
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102 | // sign returns -1 or +1 |
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103 | template<typename T> |
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104 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
|
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105 | // relies on 2c representation |
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106 | template<> |
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107 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
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108 | |
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109 | // sign0 returns -1, 0 or +1 |
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110 | template<typename T> |
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111 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
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112 | |
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113 | template<typename T, typename U> |
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114 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
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115 | |
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116 | // div* only work correctly for div > 0 |
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117 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
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118 | template<typename T> static inline T div (T val, T div) |
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119 | { |
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120 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
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121 | } |
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122 | // div, round-up |
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123 | template<typename T> static inline T div_ru (T val, T div) |
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124 | { |
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125 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
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126 | } |
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127 | // div, round-down |
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128 | template<typename T> static inline T div_rd (T val, T div) |
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129 | { |
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130 | return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div; |
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131 | } |
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132 | |
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133 | // lerp* only work correctly for min_in < max_in |
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134 | // Linear intERPolate, scales val from min_in..max_in to min_out..max_out |
| 85 | template<typename T> |
135 | template<typename T> |
| 86 | static inline T |
136 | static inline T |
| 87 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
137 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
| 88 | { |
138 | { |
| 89 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
139 | return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
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140 | } |
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141 | |
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142 | // lerp, round-down |
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143 | template<typename T> |
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144 | static inline T |
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145 | lerp_rd (T val, T min_in, T max_in, T min_out, T max_out) |
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146 | { |
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147 | return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
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148 | } |
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149 | |
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150 | // lerp, round-up |
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151 | template<typename T> |
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152 | static inline T |
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153 | lerp_ru (T val, T min_in, T max_in, T min_out, T max_out) |
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154 | { |
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155 | return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
| 90 | } |
156 | } |
| 91 | |
157 | |
| 92 | // lots of stuff taken from FXT |
158 | // lots of stuff taken from FXT |
| 93 | |
159 | |
| 94 | /* Rotate right. This is used in various places for checksumming */ |
160 | /* Rotate right. This is used in various places for checksumming */ |
| … | |
… | |
| 132 | int32_t d = b - a; |
198 | int32_t d = b - a; |
| 133 | d &= d >> 31; |
199 | d &= d >> 31; |
| 134 | return b - d; |
200 | return b - d; |
| 135 | } |
201 | } |
| 136 | |
202 | |
| 137 | // this is much faster than crossfires original algorithm |
203 | // this is much faster than crossfire's original algorithm |
| 138 | // on modern cpus |
204 | // on modern cpus |
| 139 | inline int |
205 | inline int |
| 140 | isqrt (int n) |
206 | isqrt (int n) |
| 141 | { |
207 | { |
| 142 | return (int)sqrtf ((float)n); |
208 | return (int)sqrtf ((float)n); |
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209 | } |
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210 | |
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211 | // this is kind of like the ^^ operator, if it would exist, without sequence point. |
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212 | // more handy than it looks like, due to the implicit !! done on its arguments |
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213 | inline bool |
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214 | logical_xor (bool a, bool b) |
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215 | { |
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216 | return a != b; |
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217 | } |
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218 | |
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219 | inline bool |
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220 | logical_implies (bool a, bool b) |
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221 | { |
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222 | return a <= b; |
| 143 | } |
223 | } |
| 144 | |
224 | |
| 145 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
225 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
| 146 | #if 0 |
226 | #if 0 |
| 147 | // and has a max. error of 6 in the range -100..+100. |
227 | // and has a max. error of 6 in the range -100..+100. |
| … | |
… | |
| 172 | absdir (int d) |
252 | absdir (int d) |
| 173 | { |
253 | { |
| 174 | return ((d - 1) & 7) + 1; |
254 | return ((d - 1) & 7) + 1; |
| 175 | } |
255 | } |
| 176 | |
256 | |
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257 | // avoid ctz name because netbsd or freebsd spams it's namespace with it |
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258 | #if GCC_VERSION(3,4) |
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259 | static inline int least_significant_bit (uint32_t x) |
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260 | { |
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261 | return __builtin_ctz (x); |
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262 | } |
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263 | #else |
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264 | int least_significant_bit (uint32_t x); |
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265 | #endif |
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266 | |
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267 | #define for_all_bits_sparse_32(mask, idxvar) \ |
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268 | for (uint32_t idxvar, mask_ = mask; \ |
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269 | mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);) |
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270 | |
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271 | extern ssize_t slice_alloc; // statistics |
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272 | |
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273 | void *salloc_ (int n) throw (std::bad_alloc); |
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274 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
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275 | |
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276 | // strictly the same as g_slice_alloc, but never returns 0 |
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277 | template<typename T> |
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278 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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279 | |
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280 | // also copies src into the new area, like "memdup" |
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281 | // if src is 0, clears the memory |
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282 | template<typename T> |
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283 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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284 | |
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285 | // clears the memory |
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286 | template<typename T> |
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287 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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288 | |
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289 | // for symmetry |
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290 | template<typename T> |
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291 | inline void sfree (T *ptr, int n = 1) throw () |
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292 | { |
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293 | if (expect_true (ptr)) |
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294 | { |
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295 | slice_alloc -= n * sizeof (T); |
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296 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
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297 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
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298 | assert (slice_alloc >= 0);//D |
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299 | } |
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300 | } |
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301 | |
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302 | // nulls the pointer |
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303 | template<typename T> |
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304 | inline void sfree0 (T *&ptr, int n = 1) throw () |
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305 | { |
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306 | sfree<T> (ptr, n); |
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307 | ptr = 0; |
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308 | } |
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309 | |
| 177 | // makes dynamically allocated objects zero-initialised |
310 | // makes dynamically allocated objects zero-initialised |
| 178 | struct zero_initialised |
311 | struct zero_initialised |
| 179 | { |
312 | { |
| 180 | void *operator new (size_t s, void *p) |
313 | void *operator new (size_t s, void *p) |
| 181 | { |
314 | { |
| … | |
… | |
| 183 | return p; |
316 | return p; |
| 184 | } |
317 | } |
| 185 | |
318 | |
| 186 | void *operator new (size_t s) |
319 | void *operator new (size_t s) |
| 187 | { |
320 | { |
| 188 | return g_slice_alloc0 (s); |
321 | return salloc0<char> (s); |
| 189 | } |
322 | } |
| 190 | |
323 | |
| 191 | void *operator new[] (size_t s) |
324 | void *operator new[] (size_t s) |
| 192 | { |
325 | { |
| 193 | return g_slice_alloc0 (s); |
326 | return salloc0<char> (s); |
| 194 | } |
327 | } |
| 195 | |
328 | |
| 196 | void operator delete (void *p, size_t s) |
329 | void operator delete (void *p, size_t s) |
| 197 | { |
330 | { |
| 198 | g_slice_free1 (s, p); |
331 | sfree ((char *)p, s); |
| 199 | } |
332 | } |
| 200 | |
333 | |
| 201 | void operator delete[] (void *p, size_t s) |
334 | void operator delete[] (void *p, size_t s) |
| 202 | { |
335 | { |
| 203 | g_slice_free1 (s, p); |
336 | sfree ((char *)p, s); |
| 204 | } |
337 | } |
| 205 | }; |
338 | }; |
| 206 | |
339 | |
| 207 | void *salloc_ (int n) throw (std::bad_alloc); |
340 | // makes dynamically allocated objects zero-initialised |
| 208 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
341 | struct slice_allocated |
| 209 | |
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| 210 | // strictly the same as g_slice_alloc, but never returns 0 |
|
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| 211 | template<typename T> |
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| 212 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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| 213 | |
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| 214 | // also copies src into the new area, like "memdup" |
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| 215 | // if src is 0, clears the memory |
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| 216 | template<typename T> |
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| 217 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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| 218 | |
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| 219 | // clears the memory |
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| 220 | template<typename T> |
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| 221 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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| 222 | |
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| 223 | // for symmetry |
|
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| 224 | template<typename T> |
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| 225 | inline void sfree (T *ptr, int n = 1) throw () |
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| 226 | { |
342 | { |
| 227 | #ifdef PREFER_MALLOC |
343 | void *operator new (size_t s, void *p) |
| 228 | free (ptr); |
344 | { |
| 229 | #else |
345 | return p; |
| 230 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
346 | } |
| 231 | #endif |
347 | |
| 232 | } |
348 | void *operator new (size_t s) |
|
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349 | { |
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350 | return salloc<char> (s); |
|
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351 | } |
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352 | |
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353 | void *operator new[] (size_t s) |
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354 | { |
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355 | return salloc<char> (s); |
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356 | } |
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357 | |
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358 | void operator delete (void *p, size_t s) |
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359 | { |
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360 | sfree ((char *)p, s); |
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361 | } |
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362 | |
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363 | void operator delete[] (void *p, size_t s) |
|
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364 | { |
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365 | sfree ((char *)p, s); |
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366 | } |
|
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367 | }; |
| 233 | |
368 | |
| 234 | // a STL-compatible allocator that uses g_slice |
369 | // a STL-compatible allocator that uses g_slice |
| 235 | // boy, this is verbose |
370 | // boy, this is verbose |
| 236 | template<typename Tp> |
371 | template<typename Tp> |
| 237 | struct slice_allocator |
372 | struct slice_allocator |
| … | |
… | |
| 249 | { |
384 | { |
| 250 | typedef slice_allocator<U> other; |
385 | typedef slice_allocator<U> other; |
| 251 | }; |
386 | }; |
| 252 | |
387 | |
| 253 | slice_allocator () throw () { } |
388 | slice_allocator () throw () { } |
| 254 | slice_allocator (const slice_allocator &o) throw () { } |
389 | slice_allocator (const slice_allocator &) throw () { } |
| 255 | template<typename Tp2> |
390 | template<typename Tp2> |
| 256 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
391 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
| 257 | |
392 | |
| 258 | ~slice_allocator () { } |
393 | ~slice_allocator () { } |
| 259 | |
394 | |
| … | |
… | |
| 268 | void deallocate (pointer p, size_type n) |
403 | void deallocate (pointer p, size_type n) |
| 269 | { |
404 | { |
| 270 | sfree<Tp> (p, n); |
405 | sfree<Tp> (p, n); |
| 271 | } |
406 | } |
| 272 | |
407 | |
| 273 | size_type max_size ()const throw () |
408 | size_type max_size () const throw () |
| 274 | { |
409 | { |
| 275 | return size_t (-1) / sizeof (Tp); |
410 | return size_t (-1) / sizeof (Tp); |
| 276 | } |
411 | } |
| 277 | |
412 | |
| 278 | void construct (pointer p, const Tp &val) |
413 | void construct (pointer p, const Tp &val) |
| … | |
… | |
| 289 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
424 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
| 290 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
425 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
| 291 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
426 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
| 292 | struct tausworthe_random_generator |
427 | struct tausworthe_random_generator |
| 293 | { |
428 | { |
| 294 | // generator |
|
|
| 295 | uint32_t state [4]; |
429 | uint32_t state [4]; |
| 296 | |
430 | |
| 297 | void operator =(const tausworthe_random_generator &src) |
431 | void operator =(const tausworthe_random_generator &src) |
| 298 | { |
432 | { |
| 299 | state [0] = src.state [0]; |
433 | state [0] = src.state [0]; |
| … | |
… | |
| 302 | state [3] = src.state [3]; |
436 | state [3] = src.state [3]; |
| 303 | } |
437 | } |
| 304 | |
438 | |
| 305 | void seed (uint32_t seed); |
439 | void seed (uint32_t seed); |
| 306 | uint32_t next (); |
440 | uint32_t next (); |
|
|
441 | }; |
| 307 | |
442 | |
| 308 | // uniform distribution |
443 | // Xorshift RNGs, George Marsaglia |
|
|
444 | // http://www.jstatsoft.org/v08/i14/paper |
|
|
445 | // this one is about 40% faster than the tausworthe one above (i.e. not much), |
|
|
446 | // despite the inlining, and has the issue of only creating 2**32-1 numbers. |
|
|
447 | // see also http://www.iro.umontreal.ca/~lecuyer/myftp/papers/xorshift.pdf |
|
|
448 | struct xorshift_random_generator |
|
|
449 | { |
|
|
450 | uint32_t x, y; |
|
|
451 | |
|
|
452 | void operator =(const xorshift_random_generator &src) |
|
|
453 | { |
|
|
454 | x = src.x; |
|
|
455 | y = src.y; |
|
|
456 | } |
|
|
457 | |
|
|
458 | void seed (uint32_t seed) |
|
|
459 | { |
|
|
460 | x = seed; |
|
|
461 | y = seed * 69069U; |
|
|
462 | } |
|
|
463 | |
|
|
464 | uint32_t next () |
|
|
465 | { |
|
|
466 | uint32_t t = x ^ (x << 10); |
|
|
467 | x = y; |
|
|
468 | y = y ^ (y >> 13) ^ t ^ (t >> 10); |
|
|
469 | return y; |
|
|
470 | } |
|
|
471 | }; |
|
|
472 | |
|
|
473 | template<class generator> |
|
|
474 | struct random_number_generator : generator |
|
|
475 | { |
|
|
476 | // uniform distribution, 0 .. max (0, num - 1) |
| 309 | uint32_t operator ()(uint32_t num) |
477 | uint32_t operator ()(uint32_t num) |
| 310 | { |
478 | { |
| 311 | return is_constant (num) |
479 | return !is_constant (num) ? get_range (num) // non-constant |
| 312 | ? (next () * (uint64_t)num) >> 32U |
480 | : num & (num - 1) ? (this->next () * (uint64_t)num) >> 32U // constant, non-power-of-two |
| 313 | : get_range (num); |
481 | : this->next () & (num - 1); // constant, power-of-two |
| 314 | } |
482 | } |
| 315 | |
483 | |
| 316 | // return a number within (min .. max) |
484 | // return a number within the closed interval [min .. max] |
| 317 | int operator () (int r_min, int r_max) |
485 | int operator () (int r_min, int r_max) |
| 318 | { |
486 | { |
| 319 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
487 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
| 320 | ? r_min + operator ()(r_max - r_min + 1) |
488 | ? r_min + operator ()(r_max - r_min + 1) |
| 321 | : get_range (r_min, r_max); |
489 | : get_range (r_min, r_max); |
| 322 | } |
490 | } |
| 323 | |
491 | |
|
|
492 | // return a number within the closed interval [0..1] |
| 324 | double operator ()() |
493 | double operator ()() |
| 325 | { |
494 | { |
| 326 | return this->next () / (double)0xFFFFFFFFU; |
495 | return this->next () / (double)0xFFFFFFFFU; |
| 327 | } |
496 | } |
| 328 | |
497 | |
| 329 | protected: |
498 | protected: |
| 330 | uint32_t get_range (uint32_t r_max); |
499 | uint32_t get_range (uint32_t r_max); |
| 331 | int get_range (int r_min, int r_max); |
500 | int get_range (int r_min, int r_max); |
| 332 | }; |
501 | }; |
| 333 | |
502 | |
| 334 | typedef tausworthe_random_generator rand_gen; |
503 | typedef random_number_generator<tausworthe_random_generator> rand_gen; |
| 335 | |
504 | |
| 336 | extern rand_gen rndm; |
505 | extern rand_gen rndm, rmg_rndm; |
|
|
506 | |
|
|
507 | INTERFACE_CLASS (attachable) |
|
|
508 | struct refcnt_base |
|
|
509 | { |
|
|
510 | typedef int refcnt_t; |
|
|
511 | mutable refcnt_t ACC (RW, refcnt); |
|
|
512 | |
|
|
513 | MTH void refcnt_inc () const { ++refcnt; } |
|
|
514 | MTH void refcnt_dec () const { --refcnt; } |
|
|
515 | |
|
|
516 | refcnt_base () : refcnt (0) { } |
|
|
517 | }; |
|
|
518 | |
|
|
519 | // to avoid branches with more advanced compilers |
|
|
520 | extern refcnt_base::refcnt_t refcnt_dummy; |
| 337 | |
521 | |
| 338 | template<class T> |
522 | template<class T> |
| 339 | struct refptr |
523 | struct refptr |
| 340 | { |
524 | { |
|
|
525 | // p if not null |
|
|
526 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
|
|
527 | |
|
|
528 | void refcnt_dec () |
|
|
529 | { |
|
|
530 | if (!is_constant (p)) |
|
|
531 | --*refcnt_ref (); |
|
|
532 | else if (p) |
|
|
533 | --p->refcnt; |
|
|
534 | } |
|
|
535 | |
|
|
536 | void refcnt_inc () |
|
|
537 | { |
|
|
538 | if (!is_constant (p)) |
|
|
539 | ++*refcnt_ref (); |
|
|
540 | else if (p) |
|
|
541 | ++p->refcnt; |
|
|
542 | } |
|
|
543 | |
| 341 | T *p; |
544 | T *p; |
| 342 | |
545 | |
| 343 | refptr () : p(0) { } |
546 | refptr () : p(0) { } |
| 344 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
547 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
| 345 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
548 | refptr (T *p) : p(p) { refcnt_inc (); } |
| 346 | ~refptr () { if (p) p->refcnt_dec (); } |
549 | ~refptr () { refcnt_dec (); } |
| 347 | |
550 | |
| 348 | const refptr<T> &operator =(T *o) |
551 | const refptr<T> &operator =(T *o) |
| 349 | { |
552 | { |
|
|
553 | // if decrementing ever destroys we need to reverse the order here |
| 350 | if (p) p->refcnt_dec (); |
554 | refcnt_dec (); |
| 351 | p = o; |
555 | p = o; |
| 352 | if (p) p->refcnt_inc (); |
556 | refcnt_inc (); |
| 353 | |
|
|
| 354 | return *this; |
557 | return *this; |
| 355 | } |
558 | } |
| 356 | |
559 | |
| 357 | const refptr<T> &operator =(const refptr<T> o) |
560 | const refptr<T> &operator =(const refptr<T> &o) |
| 358 | { |
561 | { |
| 359 | *this = o.p; |
562 | *this = o.p; |
| 360 | return *this; |
563 | return *this; |
| 361 | } |
564 | } |
| 362 | |
565 | |
| 363 | T &operator * () const { return *p; } |
566 | T &operator * () const { return *p; } |
| 364 | T *operator ->() const { return p; } |
567 | T *operator ->() const { return p; } |
| 365 | |
568 | |
| 366 | operator T *() const { return p; } |
569 | operator T *() const { return p; } |
| 367 | }; |
570 | }; |
| 368 | |
571 | |
| 369 | typedef refptr<maptile> maptile_ptr; |
572 | typedef refptr<maptile> maptile_ptr; |
| 370 | typedef refptr<object> object_ptr; |
573 | typedef refptr<object> object_ptr; |
| 371 | typedef refptr<archetype> arch_ptr; |
574 | typedef refptr<archetype> arch_ptr; |
| 372 | typedef refptr<client> client_ptr; |
575 | typedef refptr<client> client_ptr; |
| 373 | typedef refptr<player> player_ptr; |
576 | typedef refptr<player> player_ptr; |
|
|
577 | typedef refptr<region> region_ptr; |
|
|
578 | |
|
|
579 | #define STRHSH_NULL 2166136261 |
|
|
580 | |
|
|
581 | static inline uint32_t |
|
|
582 | strhsh (const char *s) |
|
|
583 | { |
|
|
584 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
|
|
585 | // it is about twice as fast as the one-at-a-time one, |
|
|
586 | // with good distribution. |
|
|
587 | // FNV-1a is faster on many cpus because the multiplication |
|
|
588 | // runs concurrently with the looping logic. |
|
|
589 | uint32_t hash = STRHSH_NULL; |
|
|
590 | |
|
|
591 | while (*s) |
|
|
592 | hash = (hash ^ *s++) * 16777619U; |
|
|
593 | |
|
|
594 | return hash; |
|
|
595 | } |
|
|
596 | |
|
|
597 | static inline uint32_t |
|
|
598 | memhsh (const char *s, size_t len) |
|
|
599 | { |
|
|
600 | uint32_t hash = STRHSH_NULL; |
|
|
601 | |
|
|
602 | while (len--) |
|
|
603 | hash = (hash ^ *s++) * 16777619U; |
|
|
604 | |
|
|
605 | return hash; |
|
|
606 | } |
| 374 | |
607 | |
| 375 | struct str_hash |
608 | struct str_hash |
| 376 | { |
609 | { |
| 377 | std::size_t operator ()(const char *s) const |
610 | std::size_t operator ()(const char *s) const |
| 378 | { |
611 | { |
| 379 | unsigned long hash = 0; |
|
|
| 380 | |
|
|
| 381 | /* use the one-at-a-time hash function, which supposedly is |
|
|
| 382 | * better than the djb2-like one used by perl5.005, but |
|
|
| 383 | * certainly is better then the bug used here before. |
|
|
| 384 | * see http://burtleburtle.net/bob/hash/doobs.html |
|
|
| 385 | */ |
|
|
| 386 | while (*s) |
|
|
| 387 | { |
|
|
| 388 | hash += *s++; |
|
|
| 389 | hash += hash << 10; |
|
|
| 390 | hash ^= hash >> 6; |
|
|
| 391 | } |
|
|
| 392 | |
|
|
| 393 | hash += hash << 3; |
|
|
| 394 | hash ^= hash >> 11; |
|
|
| 395 | hash += hash << 15; |
|
|
| 396 | |
|
|
| 397 | return hash; |
612 | return strhsh (s); |
|
|
613 | } |
|
|
614 | |
|
|
615 | std::size_t operator ()(const shstr &s) const |
|
|
616 | { |
|
|
617 | return strhsh (s); |
| 398 | } |
618 | } |
| 399 | }; |
619 | }; |
| 400 | |
620 | |
| 401 | struct str_equal |
621 | struct str_equal |
| 402 | { |
622 | { |
| … | |
… | |
| 458 | return obj->*indexmember |
678 | return obj->*indexmember |
| 459 | ? this->begin () + obj->*indexmember - 1 |
679 | ? this->begin () + obj->*indexmember - 1 |
| 460 | : this->end (); |
680 | : this->end (); |
| 461 | } |
681 | } |
| 462 | |
682 | |
|
|
683 | void push_back (T *obj) |
|
|
684 | { |
|
|
685 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
|
|
686 | obj->*indexmember = this->size (); |
|
|
687 | } |
|
|
688 | |
| 463 | void insert (T *obj) |
689 | void insert (T *obj) |
| 464 | { |
690 | { |
| 465 | push_back (obj); |
691 | push_back (obj); |
| 466 | obj->*indexmember = this->size (); |
|
|
| 467 | } |
692 | } |
| 468 | |
693 | |
| 469 | void insert (T &obj) |
694 | void insert (T &obj) |
| 470 | { |
695 | { |
| 471 | insert (&obj); |
696 | insert (&obj); |
| … | |
… | |
| 490 | erase (&obj); |
715 | erase (&obj); |
| 491 | } |
716 | } |
| 492 | }; |
717 | }; |
| 493 | |
718 | |
| 494 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
719 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
|
|
720 | // returns the number of bytes actually used (including \0) |
| 495 | void assign (char *dst, const char *src, int maxlen); |
721 | int assign (char *dst, const char *src, int maxsize); |
| 496 | |
722 | |
| 497 | // type-safe version of assign |
723 | // type-safe version of assign |
| 498 | template<int N> |
724 | template<int N> |
| 499 | inline void assign (char (&dst)[N], const char *src) |
725 | inline int assign (char (&dst)[N], const char *src) |
| 500 | { |
726 | { |
| 501 | assign ((char *)&dst, src, N); |
727 | return assign ((char *)&dst, src, N); |
| 502 | } |
728 | } |
| 503 | |
729 | |
| 504 | typedef double tstamp; |
730 | typedef double tstamp; |
| 505 | |
731 | |
| 506 | // return current time as timestampe |
732 | // return current time as timestamp |
| 507 | tstamp now (); |
733 | tstamp now (); |
| 508 | |
734 | |
| 509 | int similar_direction (int a, int b); |
735 | int similar_direction (int a, int b); |
| 510 | |
736 | |
| 511 | // like printf, but returns a std::string |
737 | // like v?sprintf, but returns a "static" buffer |
| 512 | const std::string format (const char *format, ...); |
738 | char *vformat (const char *format, va_list ap); |
|
|
739 | char *format (const char *format, ...) attribute ((format (printf, 1, 2))); |
| 513 | |
740 | |
|
|
741 | // safety-check player input which will become object->msg |
|
|
742 | bool msg_is_safe (const char *msg); |
|
|
743 | |
|
|
744 | ///////////////////////////////////////////////////////////////////////////// |
|
|
745 | // threads, very very thin wrappers around pthreads |
|
|
746 | |
|
|
747 | struct thread |
|
|
748 | { |
|
|
749 | pthread_t id; |
|
|
750 | |
|
|
751 | void start (void *(*start_routine)(void *), void *arg = 0); |
|
|
752 | |
|
|
753 | void cancel () |
|
|
754 | { |
|
|
755 | pthread_cancel (id); |
|
|
756 | } |
|
|
757 | |
|
|
758 | void *join () |
|
|
759 | { |
|
|
760 | void *ret; |
|
|
761 | |
|
|
762 | if (pthread_join (id, &ret)) |
|
|
763 | cleanup ("pthread_join failed", 1); |
|
|
764 | |
|
|
765 | return ret; |
|
|
766 | } |
|
|
767 | }; |
|
|
768 | |
|
|
769 | // note that mutexes are not classes |
|
|
770 | typedef pthread_mutex_t smutex; |
|
|
771 | |
|
|
772 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
773 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
|
|
774 | #else |
|
|
775 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
| 514 | #endif |
776 | #endif |
| 515 | |
777 | |
|
|
778 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
779 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
780 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
|
|
781 | |
|
|
782 | typedef pthread_cond_t scond; |
|
|
783 | |
|
|
784 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
|
|
785 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
|
|
786 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
|
|
787 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
|
|
788 | |
|
|
789 | #endif |
|
|
790 | |
