| 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 (©) 2005,2006,2007,2008,2009,2010,2011,2012 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) |
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| 31 | #else |
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| 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 | #if cplusplus_does_not_suck |
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61 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
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62 | template<typename T, int N> |
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63 | static inline int array_length (const T (&arr)[N]) |
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64 | { |
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65 | return N; |
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66 | } |
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67 | #else |
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68 | #define array_length(name) (sizeof (name) / sizeof (name [0])) |
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69 | #endif |
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70 | |
| 60 | // very ugly macro that basicaly declares and initialises a variable |
71 | // very ugly macro that basically declares and initialises a variable |
| 61 | // that is in scope for the next statement only |
72 | // that is in scope for the next statement only |
| 62 | // 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 |
| 63 | // (note: works great for pointers) |
74 | // (note: works great for pointers) |
| 64 | // most ugly macro I ever wrote |
75 | // most ugly macro I ever wrote |
| 65 | #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) |
| … | |
… | |
| 70 | |
81 | |
| 71 | // in range excluding end |
82 | // in range excluding end |
| 72 | #define IN_RANGE_EXC(val,beg,end) \ |
83 | #define IN_RANGE_EXC(val,beg,end) \ |
| 73 | ((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)) |
| 74 | |
85 | |
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86 | void cleanup (const char *cause, bool make_core = false); |
| 75 | void fork_abort (const char *msg); |
87 | void fork_abort (const char *msg); |
| 76 | |
88 | |
| 77 | // 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, |
| 78 | // 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. |
| 79 | 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 a < (T)b ? a : (T)b; } |
| 80 | 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 a > (T)b ? a : (T)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; } |
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; } |
| 82 | |
94 | |
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95 | template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); } |
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96 | template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
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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); } |
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98 | |
| 83 | 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; } |
| 84 | |
100 | |
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101 | 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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102 | 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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103 | |
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104 | // sign returns -1 or +1 |
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105 | template<typename T> |
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106 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
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107 | // relies on 2c representation |
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108 | template<> |
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109 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
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110 | template<> |
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111 | inline sint16 sign (sint16 v) { return 1 - (sint16 (uint16 (v) >> 15) * 2); } |
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112 | template<> |
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113 | inline sint32 sign (sint32 v) { return 1 - (sint32 (uint32 (v) >> 31) * 2); } |
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114 | |
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115 | // sign0 returns -1, 0 or +1 |
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116 | template<typename T> |
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117 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
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118 | |
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119 | //clashes with C++0x |
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120 | template<typename T, typename U> |
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121 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
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122 | |
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123 | // div* only work correctly for div > 0 |
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124 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
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125 | template<typename T> static inline T div (T val, T div) |
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126 | { |
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127 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
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128 | } |
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129 | |
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130 | template<> inline float div (float val, float div) { return val / div; } |
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131 | template<> inline double div (double val, double div) { return val / div; } |
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132 | |
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133 | // div, round-up |
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134 | template<typename T> static inline T div_ru (T val, T div) |
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135 | { |
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136 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
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137 | } |
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138 | // div, round-down |
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139 | template<typename T> static inline T div_rd (T val, T div) |
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140 | { |
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141 | return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div; |
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142 | } |
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143 | |
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144 | // lerp* only work correctly for min_in < max_in |
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145 | // Linear intERPolate, scales val from min_in..max_in to min_out..max_out |
| 85 | template<typename T> |
146 | template<typename T> |
| 86 | static inline T |
147 | static inline T |
| 87 | 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) |
| 88 | { |
149 | { |
| 89 | 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); |
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151 | } |
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152 | |
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153 | // lerp, round-down |
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154 | template<typename T> |
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155 | static inline T |
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156 | lerp_rd (T val, T min_in, T max_in, T min_out, T max_out) |
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157 | { |
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158 | return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
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159 | } |
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160 | |
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161 | // lerp, round-up |
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162 | template<typename T> |
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163 | static inline T |
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164 | lerp_ru (T val, T min_in, T max_in, T min_out, T max_out) |
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165 | { |
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166 | return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
| 90 | } |
167 | } |
| 91 | |
168 | |
| 92 | // lots of stuff taken from FXT |
169 | // lots of stuff taken from FXT |
| 93 | |
170 | |
| 94 | /* Rotate right. This is used in various places for checksumming */ |
171 | /* Rotate right. This is used in various places for checksumming */ |
| … | |
… | |
| 132 | int32_t d = b - a; |
209 | int32_t d = b - a; |
| 133 | d &= d >> 31; |
210 | d &= d >> 31; |
| 134 | return b - d; |
211 | return b - d; |
| 135 | } |
212 | } |
| 136 | |
213 | |
| 137 | // this is much faster than crossfires original algorithm |
214 | // this is much faster than crossfire's original algorithm |
| 138 | // on modern cpus |
215 | // on modern cpus |
| 139 | inline int |
216 | inline int |
| 140 | isqrt (int n) |
217 | isqrt (int n) |
| 141 | { |
218 | { |
| 142 | return (int)sqrtf ((float)n); |
219 | return (int)sqrtf ((float)n); |
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220 | } |
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221 | |
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222 | // this is kind of like the ^^ operator, if it would exist, without sequence point. |
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223 | // more handy than it looks like, due to the implicit !! done on its arguments |
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224 | inline bool |
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225 | logical_xor (bool a, bool b) |
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226 | { |
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227 | return a != b; |
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228 | } |
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229 | |
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230 | inline bool |
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231 | logical_implies (bool a, bool b) |
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232 | { |
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233 | return a <= b; |
| 143 | } |
234 | } |
| 144 | |
235 | |
| 145 | // 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) |
| 146 | #if 0 |
237 | #if 0 |
| 147 | // 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. |
| … | |
… | |
| 161 | #else |
252 | #else |
| 162 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
253 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
| 163 | #endif |
254 | #endif |
| 164 | } |
255 | } |
| 165 | |
256 | |
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257 | // can be substantially faster than floor, if your value range allows for it |
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258 | template<typename T> |
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259 | inline T |
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260 | fastfloor (T x) |
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261 | { |
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262 | return std::floor (x); |
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263 | } |
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264 | |
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265 | inline float |
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266 | fastfloor (float x) |
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267 | { |
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268 | return sint32(x) - (x < 0); |
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269 | } |
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270 | |
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271 | inline double |
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272 | fastfloor (double x) |
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273 | { |
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274 | return sint64(x) - (x < 0); |
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275 | } |
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276 | |
| 166 | /* |
277 | /* |
| 167 | * absdir(int): Returns a number between 1 and 8, which represent |
278 | * absdir(int): Returns a number between 1 and 8, which represent |
| 168 | * the "absolute" direction of a number (it actually takes care of |
279 | * the "absolute" direction of a number (it actually takes care of |
| 169 | * "overflow" in previous calculations of a direction). |
280 | * "overflow" in previous calculations of a direction). |
| 170 | */ |
281 | */ |
| … | |
… | |
| 172 | absdir (int d) |
283 | absdir (int d) |
| 173 | { |
284 | { |
| 174 | return ((d - 1) & 7) + 1; |
285 | return ((d - 1) & 7) + 1; |
| 175 | } |
286 | } |
| 176 | |
287 | |
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288 | // avoid ctz name because netbsd or freebsd spams it's namespace with it |
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289 | #if GCC_VERSION(3,4) |
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290 | static inline int least_significant_bit (uint32_t x) |
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291 | { |
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292 | return __builtin_ctz (x); |
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293 | } |
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294 | #else |
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295 | int least_significant_bit (uint32_t x); |
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296 | #endif |
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297 | |
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298 | #define for_all_bits_sparse_32(mask, idxvar) \ |
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299 | for (uint32_t idxvar, mask_ = mask; \ |
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300 | mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);) |
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301 | |
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302 | extern ssize_t slice_alloc; // statistics |
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303 | |
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304 | void *salloc_ (int n) throw (std::bad_alloc); |
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305 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
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306 | |
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307 | // strictly the same as g_slice_alloc, but never returns 0 |
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308 | template<typename T> |
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309 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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310 | |
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311 | // also copies src into the new area, like "memdup" |
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312 | // if src is 0, clears the memory |
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313 | template<typename T> |
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314 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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315 | |
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316 | // clears the memory |
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317 | template<typename T> |
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318 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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319 | |
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320 | // for symmetry |
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321 | template<typename T> |
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322 | inline void sfree (T *ptr, int n = 1) throw () |
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323 | { |
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324 | if (expect_true (ptr)) |
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325 | { |
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326 | slice_alloc -= n * sizeof (T); |
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327 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
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328 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
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329 | } |
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330 | } |
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331 | |
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332 | // nulls the pointer |
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333 | template<typename T> |
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334 | inline void sfree0 (T *&ptr, int n = 1) throw () |
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335 | { |
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336 | sfree<T> (ptr, n); |
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337 | ptr = 0; |
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338 | } |
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339 | |
| 177 | // makes dynamically allocated objects zero-initialised |
340 | // makes dynamically allocated objects zero-initialised |
| 178 | struct zero_initialised |
341 | struct zero_initialised |
| 179 | { |
342 | { |
| 180 | void *operator new (size_t s, void *p) |
343 | void *operator new (size_t s, void *p) |
| 181 | { |
344 | { |
| … | |
… | |
| 183 | return p; |
346 | return p; |
| 184 | } |
347 | } |
| 185 | |
348 | |
| 186 | void *operator new (size_t s) |
349 | void *operator new (size_t s) |
| 187 | { |
350 | { |
| 188 | return g_slice_alloc0 (s); |
351 | return salloc0<char> (s); |
| 189 | } |
352 | } |
| 190 | |
353 | |
| 191 | void *operator new[] (size_t s) |
354 | void *operator new[] (size_t s) |
| 192 | { |
355 | { |
| 193 | return g_slice_alloc0 (s); |
356 | return salloc0<char> (s); |
| 194 | } |
357 | } |
| 195 | |
358 | |
| 196 | void operator delete (void *p, size_t s) |
359 | void operator delete (void *p, size_t s) |
| 197 | { |
360 | { |
| 198 | g_slice_free1 (s, p); |
361 | sfree ((char *)p, s); |
| 199 | } |
362 | } |
| 200 | |
363 | |
| 201 | void operator delete[] (void *p, size_t s) |
364 | void operator delete[] (void *p, size_t s) |
| 202 | { |
365 | { |
| 203 | g_slice_free1 (s, p); |
366 | sfree ((char *)p, s); |
| 204 | } |
367 | } |
| 205 | }; |
368 | }; |
| 206 | |
369 | |
| 207 | void *salloc_ (int n) throw (std::bad_alloc); |
370 | // makes dynamically allocated objects zero-initialised |
| 208 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
371 | 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); } |
|
|
| 218 | |
|
|
| 219 | // clears the memory |
|
|
| 220 | template<typename T> |
|
|
| 221 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
|
|
| 222 | |
|
|
| 223 | // for symmetry |
|
|
| 224 | template<typename T> |
|
|
| 225 | inline void sfree (T *ptr, int n = 1) throw () |
|
|
| 226 | { |
372 | { |
| 227 | #ifdef PREFER_MALLOC |
373 | void *operator new (size_t s, void *p) |
| 228 | free (ptr); |
374 | { |
| 229 | #else |
375 | return p; |
| 230 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
376 | } |
| 231 | #endif |
377 | |
| 232 | } |
378 | void *operator new (size_t s) |
|
|
379 | { |
|
|
380 | return salloc<char> (s); |
|
|
381 | } |
|
|
382 | |
|
|
383 | void *operator new[] (size_t s) |
|
|
384 | { |
|
|
385 | return salloc<char> (s); |
|
|
386 | } |
|
|
387 | |
|
|
388 | void operator delete (void *p, size_t s) |
|
|
389 | { |
|
|
390 | sfree ((char *)p, s); |
|
|
391 | } |
|
|
392 | |
|
|
393 | void operator delete[] (void *p, size_t s) |
|
|
394 | { |
|
|
395 | sfree ((char *)p, s); |
|
|
396 | } |
|
|
397 | }; |
| 233 | |
398 | |
| 234 | // a STL-compatible allocator that uses g_slice |
399 | // a STL-compatible allocator that uses g_slice |
| 235 | // boy, this is verbose |
400 | // boy, this is verbose |
| 236 | template<typename Tp> |
401 | template<typename Tp> |
| 237 | struct slice_allocator |
402 | struct slice_allocator |
| … | |
… | |
| 249 | { |
414 | { |
| 250 | typedef slice_allocator<U> other; |
415 | typedef slice_allocator<U> other; |
| 251 | }; |
416 | }; |
| 252 | |
417 | |
| 253 | slice_allocator () throw () { } |
418 | slice_allocator () throw () { } |
| 254 | slice_allocator (const slice_allocator &o) throw () { } |
419 | slice_allocator (const slice_allocator &) throw () { } |
| 255 | template<typename Tp2> |
420 | template<typename Tp2> |
| 256 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
421 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
| 257 | |
422 | |
| 258 | ~slice_allocator () { } |
423 | ~slice_allocator () { } |
| 259 | |
424 | |
| … | |
… | |
| 268 | void deallocate (pointer p, size_type n) |
433 | void deallocate (pointer p, size_type n) |
| 269 | { |
434 | { |
| 270 | sfree<Tp> (p, n); |
435 | sfree<Tp> (p, n); |
| 271 | } |
436 | } |
| 272 | |
437 | |
| 273 | size_type max_size ()const throw () |
438 | size_type max_size () const throw () |
| 274 | { |
439 | { |
| 275 | return size_t (-1) / sizeof (Tp); |
440 | return size_t (-1) / sizeof (Tp); |
| 276 | } |
441 | } |
| 277 | |
442 | |
| 278 | void construct (pointer p, const Tp &val) |
443 | void construct (pointer p, const Tp &val) |
| … | |
… | |
| 284 | { |
449 | { |
| 285 | p->~Tp (); |
450 | p->~Tp (); |
| 286 | } |
451 | } |
| 287 | }; |
452 | }; |
| 288 | |
453 | |
| 289 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
454 | // basically a memory area, but refcounted |
| 290 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
455 | struct refcnt_buf |
| 291 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
|
|
| 292 | struct tausworthe_random_generator |
|
|
| 293 | { |
456 | { |
| 294 | // generator |
457 | char *data; |
| 295 | uint32_t state [4]; |
|
|
| 296 | |
458 | |
| 297 | void operator =(const tausworthe_random_generator &src) |
459 | refcnt_buf (size_t size = 0); |
| 298 | { |
460 | refcnt_buf (void *data, size_t size); |
| 299 | state [0] = src.state [0]; |
|
|
| 300 | state [1] = src.state [1]; |
|
|
| 301 | state [2] = src.state [2]; |
|
|
| 302 | state [3] = src.state [3]; |
|
|
| 303 | } |
|
|
| 304 | |
461 | |
| 305 | void seed (uint32_t seed); |
462 | refcnt_buf (const refcnt_buf &src) |
| 306 | uint32_t next (); |
|
|
| 307 | |
|
|
| 308 | // uniform distribution |
|
|
| 309 | uint32_t operator ()(uint32_t num) |
|
|
| 310 | { |
463 | { |
| 311 | return is_constant (num) |
464 | data = src.data; |
| 312 | ? (next () * (uint64_t)num) >> 32U |
465 | inc (); |
| 313 | : get_range (num); |
|
|
| 314 | } |
466 | } |
| 315 | |
467 | |
| 316 | // return a number within (min .. max) |
468 | ~refcnt_buf (); |
| 317 | int operator () (int r_min, int r_max) |
|
|
| 318 | { |
|
|
| 319 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
|
|
| 320 | ? r_min + operator ()(r_max - r_min + 1) |
|
|
| 321 | : get_range (r_min, r_max); |
|
|
| 322 | } |
|
|
| 323 | |
469 | |
| 324 | double operator ()() |
470 | refcnt_buf &operator =(const refcnt_buf &src); |
|
|
471 | |
|
|
472 | operator char *() |
| 325 | { |
473 | { |
| 326 | return this->next () / (double)0xFFFFFFFFU; |
474 | return data; |
|
|
475 | } |
|
|
476 | |
|
|
477 | size_t size () const |
|
|
478 | { |
|
|
479 | return _size (); |
| 327 | } |
480 | } |
| 328 | |
481 | |
| 329 | protected: |
482 | protected: |
| 330 | uint32_t get_range (uint32_t r_max); |
483 | enum { |
| 331 | int get_range (int r_min, int r_max); |
484 | overhead = sizeof (uint32_t) * 2 |
| 332 | }; |
485 | }; |
| 333 | |
486 | |
| 334 | typedef tausworthe_random_generator rand_gen; |
487 | uint32_t &_size () const |
|
|
488 | { |
|
|
489 | return ((unsigned int *)data)[-2]; |
|
|
490 | } |
| 335 | |
491 | |
| 336 | extern rand_gen rndm; |
492 | uint32_t &_refcnt () const |
|
|
493 | { |
|
|
494 | return ((unsigned int *)data)[-1]; |
|
|
495 | } |
|
|
496 | |
|
|
497 | void _alloc (uint32_t size) |
|
|
498 | { |
|
|
499 | data = ((char *)salloc<char> (size + overhead)) + overhead; |
|
|
500 | _size () = size; |
|
|
501 | _refcnt () = 1; |
|
|
502 | } |
|
|
503 | |
|
|
504 | void _dealloc (); |
|
|
505 | |
|
|
506 | void inc () |
|
|
507 | { |
|
|
508 | ++_refcnt (); |
|
|
509 | } |
|
|
510 | |
|
|
511 | void dec () |
|
|
512 | { |
|
|
513 | if (!--_refcnt ()) |
|
|
514 | _dealloc (); |
|
|
515 | } |
|
|
516 | }; |
|
|
517 | |
|
|
518 | INTERFACE_CLASS (attachable) |
|
|
519 | struct refcnt_base |
|
|
520 | { |
|
|
521 | typedef int refcnt_t; |
|
|
522 | mutable refcnt_t ACC (RW, refcnt); |
|
|
523 | |
|
|
524 | MTH void refcnt_inc () const { ++refcnt; } |
|
|
525 | MTH void refcnt_dec () const { --refcnt; } |
|
|
526 | |
|
|
527 | refcnt_base () : refcnt (0) { } |
|
|
528 | }; |
|
|
529 | |
|
|
530 | // to avoid branches with more advanced compilers |
|
|
531 | extern refcnt_base::refcnt_t refcnt_dummy; |
| 337 | |
532 | |
| 338 | template<class T> |
533 | template<class T> |
| 339 | struct refptr |
534 | struct refptr |
| 340 | { |
535 | { |
|
|
536 | // p if not null |
|
|
537 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
|
|
538 | |
|
|
539 | void refcnt_dec () |
|
|
540 | { |
|
|
541 | if (!is_constant (p)) |
|
|
542 | --*refcnt_ref (); |
|
|
543 | else if (p) |
|
|
544 | --p->refcnt; |
|
|
545 | } |
|
|
546 | |
|
|
547 | void refcnt_inc () |
|
|
548 | { |
|
|
549 | if (!is_constant (p)) |
|
|
550 | ++*refcnt_ref (); |
|
|
551 | else if (p) |
|
|
552 | ++p->refcnt; |
|
|
553 | } |
|
|
554 | |
| 341 | T *p; |
555 | T *p; |
| 342 | |
556 | |
| 343 | refptr () : p(0) { } |
557 | refptr () : p(0) { } |
| 344 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
558 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
| 345 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
559 | refptr (T *p) : p(p) { refcnt_inc (); } |
| 346 | ~refptr () { if (p) p->refcnt_dec (); } |
560 | ~refptr () { refcnt_dec (); } |
| 347 | |
561 | |
| 348 | const refptr<T> &operator =(T *o) |
562 | const refptr<T> &operator =(T *o) |
| 349 | { |
563 | { |
|
|
564 | // if decrementing ever destroys we need to reverse the order here |
| 350 | if (p) p->refcnt_dec (); |
565 | refcnt_dec (); |
| 351 | p = o; |
566 | p = o; |
| 352 | if (p) p->refcnt_inc (); |
567 | refcnt_inc (); |
| 353 | |
|
|
| 354 | return *this; |
568 | return *this; |
| 355 | } |
569 | } |
| 356 | |
570 | |
| 357 | const refptr<T> &operator =(const refptr<T> o) |
571 | const refptr<T> &operator =(const refptr<T> &o) |
| 358 | { |
572 | { |
| 359 | *this = o.p; |
573 | *this = o.p; |
| 360 | return *this; |
574 | return *this; |
| 361 | } |
575 | } |
| 362 | |
576 | |
| 363 | T &operator * () const { return *p; } |
577 | T &operator * () const { return *p; } |
| 364 | T *operator ->() const { return p; } |
578 | T *operator ->() const { return p; } |
| 365 | |
579 | |
| 366 | operator T *() const { return p; } |
580 | operator T *() const { return p; } |
| 367 | }; |
581 | }; |
| 368 | |
582 | |
| 369 | typedef refptr<maptile> maptile_ptr; |
583 | typedef refptr<maptile> maptile_ptr; |
| 370 | typedef refptr<object> object_ptr; |
584 | typedef refptr<object> object_ptr; |
| 371 | typedef refptr<archetype> arch_ptr; |
585 | typedef refptr<archetype> arch_ptr; |
| 372 | typedef refptr<client> client_ptr; |
586 | typedef refptr<client> client_ptr; |
| 373 | typedef refptr<player> player_ptr; |
587 | typedef refptr<player> player_ptr; |
|
|
588 | typedef refptr<region> region_ptr; |
|
|
589 | |
|
|
590 | #define STRHSH_NULL 2166136261 |
|
|
591 | |
|
|
592 | static inline uint32_t |
|
|
593 | strhsh (const char *s) |
|
|
594 | { |
|
|
595 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
|
|
596 | // it is about twice as fast as the one-at-a-time one, |
|
|
597 | // with good distribution. |
|
|
598 | // FNV-1a is faster on many cpus because the multiplication |
|
|
599 | // runs concurrently with the looping logic. |
|
|
600 | // we modify the hash a bit to improve its distribution |
|
|
601 | uint32_t hash = STRHSH_NULL; |
|
|
602 | |
|
|
603 | while (*s) |
|
|
604 | hash = (hash ^ *s++) * 16777619U; |
|
|
605 | |
|
|
606 | return hash ^ (hash >> 16); |
|
|
607 | } |
|
|
608 | |
|
|
609 | static inline uint32_t |
|
|
610 | memhsh (const char *s, size_t len) |
|
|
611 | { |
|
|
612 | uint32_t hash = STRHSH_NULL; |
|
|
613 | |
|
|
614 | while (len--) |
|
|
615 | hash = (hash ^ *s++) * 16777619U; |
|
|
616 | |
|
|
617 | return hash; |
|
|
618 | } |
| 374 | |
619 | |
| 375 | struct str_hash |
620 | struct str_hash |
| 376 | { |
621 | { |
| 377 | std::size_t operator ()(const char *s) const |
622 | std::size_t operator ()(const char *s) const |
| 378 | { |
623 | { |
| 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; |
624 | return strhsh (s); |
|
|
625 | } |
|
|
626 | |
|
|
627 | std::size_t operator ()(const shstr &s) const |
|
|
628 | { |
|
|
629 | return strhsh (s); |
| 398 | } |
630 | } |
| 399 | }; |
631 | }; |
| 400 | |
632 | |
| 401 | struct str_equal |
633 | struct str_equal |
| 402 | { |
634 | { |
| … | |
… | |
| 405 | return !strcmp (a, b); |
637 | return !strcmp (a, b); |
| 406 | } |
638 | } |
| 407 | }; |
639 | }; |
| 408 | |
640 | |
| 409 | // Mostly the same as std::vector, but insert/erase can reorder |
641 | // Mostly the same as std::vector, but insert/erase can reorder |
| 410 | // the elements, making insret/remove O(1) instead of O(n). |
642 | // the elements, making append(=insert)/remove O(1) instead of O(n). |
| 411 | // |
643 | // |
| 412 | // NOTE: only some forms of erase/insert are available |
644 | // NOTE: only some forms of erase are available |
| 413 | template<class T> |
645 | template<class T> |
| 414 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
646 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
| 415 | { |
647 | { |
| 416 | typedef typename unordered_vector::iterator iterator; |
648 | typedef typename unordered_vector::iterator iterator; |
| 417 | |
649 | |
| … | |
… | |
| 429 | } |
661 | } |
| 430 | }; |
662 | }; |
| 431 | |
663 | |
| 432 | // This container blends advantages of linked lists |
664 | // This container blends advantages of linked lists |
| 433 | // (efficiency) with vectors (random access) by |
665 | // (efficiency) with vectors (random access) by |
| 434 | // by using an unordered vector and storing the vector |
666 | // using an unordered vector and storing the vector |
| 435 | // index inside the object. |
667 | // index inside the object. |
| 436 | // |
668 | // |
| 437 | // + memory-efficient on most 64 bit archs |
669 | // + memory-efficient on most 64 bit archs |
| 438 | // + O(1) insert/remove |
670 | // + O(1) insert/remove |
| 439 | // + free unique (but varying) id for inserted objects |
671 | // + free unique (but varying) id for inserted objects |
| … | |
… | |
| 458 | return obj->*indexmember |
690 | return obj->*indexmember |
| 459 | ? this->begin () + obj->*indexmember - 1 |
691 | ? this->begin () + obj->*indexmember - 1 |
| 460 | : this->end (); |
692 | : this->end (); |
| 461 | } |
693 | } |
| 462 | |
694 | |
|
|
695 | void push_back (T *obj) |
|
|
696 | { |
|
|
697 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
|
|
698 | obj->*indexmember = this->size (); |
|
|
699 | } |
|
|
700 | |
| 463 | void insert (T *obj) |
701 | void insert (T *obj) |
| 464 | { |
702 | { |
| 465 | push_back (obj); |
703 | push_back (obj); |
| 466 | obj->*indexmember = this->size (); |
|
|
| 467 | } |
704 | } |
| 468 | |
705 | |
| 469 | void insert (T &obj) |
706 | void insert (T &obj) |
| 470 | { |
707 | { |
| 471 | insert (&obj); |
708 | insert (&obj); |
| 472 | } |
709 | } |
| 473 | |
710 | |
| 474 | void erase (T *obj) |
711 | void erase (T *obj) |
| 475 | { |
712 | { |
| 476 | unsigned int pos = obj->*indexmember; |
713 | object_vector_index pos = obj->*indexmember; |
| 477 | obj->*indexmember = 0; |
714 | obj->*indexmember = 0; |
| 478 | |
715 | |
| 479 | if (pos < this->size ()) |
716 | if (pos < this->size ()) |
| 480 | { |
717 | { |
| 481 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
718 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
| … | |
… | |
| 489 | { |
726 | { |
| 490 | erase (&obj); |
727 | erase (&obj); |
| 491 | } |
728 | } |
| 492 | }; |
729 | }; |
| 493 | |
730 | |
|
|
731 | ///////////////////////////////////////////////////////////////////////////// |
|
|
732 | |
|
|
733 | // something like a vector or stack, but without |
|
|
734 | // out of bounds checking |
|
|
735 | template<typename T> |
|
|
736 | struct fixed_stack |
|
|
737 | { |
|
|
738 | T *data; |
|
|
739 | int size; |
|
|
740 | int max; |
|
|
741 | |
|
|
742 | fixed_stack () |
|
|
743 | : size (0), data (0) |
|
|
744 | { |
|
|
745 | } |
|
|
746 | |
|
|
747 | fixed_stack (int max) |
|
|
748 | : size (0), max (max) |
|
|
749 | { |
|
|
750 | data = salloc<T> (max); |
|
|
751 | } |
|
|
752 | |
|
|
753 | void reset (int new_max) |
|
|
754 | { |
|
|
755 | sfree (data, max); |
|
|
756 | size = 0; |
|
|
757 | max = new_max; |
|
|
758 | data = salloc<T> (max); |
|
|
759 | } |
|
|
760 | |
|
|
761 | void free () |
|
|
762 | { |
|
|
763 | sfree (data, max); |
|
|
764 | data = 0; |
|
|
765 | } |
|
|
766 | |
|
|
767 | ~fixed_stack () |
|
|
768 | { |
|
|
769 | sfree (data, max); |
|
|
770 | } |
|
|
771 | |
|
|
772 | T &operator[](int idx) |
|
|
773 | { |
|
|
774 | return data [idx]; |
|
|
775 | } |
|
|
776 | |
|
|
777 | void push (T v) |
|
|
778 | { |
|
|
779 | data [size++] = v; |
|
|
780 | } |
|
|
781 | |
|
|
782 | T &pop () |
|
|
783 | { |
|
|
784 | return data [--size]; |
|
|
785 | } |
|
|
786 | |
|
|
787 | T remove (int idx) |
|
|
788 | { |
|
|
789 | T v = data [idx]; |
|
|
790 | |
|
|
791 | data [idx] = data [--size]; |
|
|
792 | |
|
|
793 | return v; |
|
|
794 | } |
|
|
795 | }; |
|
|
796 | |
|
|
797 | ///////////////////////////////////////////////////////////////////////////// |
|
|
798 | |
| 494 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
799 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
|
|
800 | // returns the number of bytes actually used (including \0) |
| 495 | void assign (char *dst, const char *src, int maxlen); |
801 | int assign (char *dst, const char *src, int maxsize); |
| 496 | |
802 | |
| 497 | // type-safe version of assign |
803 | // type-safe version of assign |
| 498 | template<int N> |
804 | template<int N> |
| 499 | inline void assign (char (&dst)[N], const char *src) |
805 | inline int assign (char (&dst)[N], const char *src) |
| 500 | { |
806 | { |
| 501 | assign ((char *)&dst, src, N); |
807 | return assign ((char *)&dst, src, N); |
| 502 | } |
808 | } |
| 503 | |
809 | |
| 504 | typedef double tstamp; |
810 | typedef double tstamp; |
| 505 | |
811 | |
| 506 | // return current time as timestampe |
812 | // return current time as timestamp |
| 507 | tstamp now (); |
813 | tstamp now (); |
| 508 | |
814 | |
| 509 | int similar_direction (int a, int b); |
815 | int similar_direction (int a, int b); |
| 510 | |
816 | |
| 511 | // like printf, but returns a std::string |
817 | // like v?sprintf, but returns a "static" buffer |
| 512 | const std::string format (const char *format, ...); |
818 | char *vformat (const char *format, va_list ap); |
|
|
819 | char *format (const char *format, ...) attribute ((format (printf, 1, 2))); |
| 513 | |
820 | |
|
|
821 | // safety-check player input which will become object->msg |
|
|
822 | bool msg_is_safe (const char *msg); |
|
|
823 | |
|
|
824 | ///////////////////////////////////////////////////////////////////////////// |
|
|
825 | // threads, very very thin wrappers around pthreads |
|
|
826 | |
|
|
827 | struct thread |
|
|
828 | { |
|
|
829 | pthread_t id; |
|
|
830 | |
|
|
831 | void start (void *(*start_routine)(void *), void *arg = 0); |
|
|
832 | |
|
|
833 | void cancel () |
|
|
834 | { |
|
|
835 | pthread_cancel (id); |
|
|
836 | } |
|
|
837 | |
|
|
838 | void *join () |
|
|
839 | { |
|
|
840 | void *ret; |
|
|
841 | |
|
|
842 | if (pthread_join (id, &ret)) |
|
|
843 | cleanup ("pthread_join failed", 1); |
|
|
844 | |
|
|
845 | return ret; |
|
|
846 | } |
|
|
847 | }; |
|
|
848 | |
|
|
849 | // note that mutexes are not classes |
|
|
850 | typedef pthread_mutex_t smutex; |
|
|
851 | |
|
|
852 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
853 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
|
|
854 | #else |
|
|
855 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
| 514 | #endif |
856 | #endif |
| 515 | |
857 | |
|
|
858 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
859 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
860 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
|
|
861 | |
|
|
862 | typedef pthread_cond_t scond; |
|
|
863 | |
|
|
864 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
|
|
865 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
|
|
866 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
|
|
867 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
|
|
868 | |
|
|
869 | #endif |
|
|
870 | |
