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1 | /* |
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2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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3 | * |
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4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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5 | * |
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6 | * Deliantra is free software: you can redistribute it and/or modify |
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7 | * it under the terms of the GNU General Public License as published by |
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8 | * the Free Software Foundation, either version 3 of the License, or |
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9 | * (at your option) any later version. |
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10 | * |
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11 | * This program is distributed in the hope that it will be useful, |
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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14 | * GNU General Public License for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU General Public License |
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17 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
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18 | * |
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19 | * The authors can be reached via e-mail to <support@deliantra.net> |
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20 | */ |
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21 | |
1 | #ifndef UTIL_H__ |
22 | #ifndef UTIL_H__ |
2 | #define UTIL_H__ |
23 | #define UTIL_H__ |
3 | |
24 | |
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25 | #define DEBUG_POISON 0xaa // poison memory before freeing it if != 0 |
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26 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
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27 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
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28 | |
4 | #if __GNUC__ >= 3 |
29 | #if __GNUC__ >= 3 |
5 | # define is_constant(c) __builtin_constant_p (c) |
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) |
6 | #else |
33 | #else |
7 | # define is_constant(c) 0 |
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) |
8 | #endif |
37 | #endif |
9 | |
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 | |
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49 | #include <pthread.h> |
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50 | |
10 | #include <cstddef> |
51 | #include <cstddef> |
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52 | #include <cmath> |
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53 | #include <new> |
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54 | #include <vector> |
11 | |
55 | |
12 | #include <glib.h> |
56 | #include <glib.h> |
13 | |
57 | |
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58 | #include <shstr.h> |
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59 | #include <traits.h> |
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60 | |
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61 | #if DEBUG_SALLOC |
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62 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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63 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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64 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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65 | void *g_slice_alloc (unsigned long size); |
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66 | void *g_slice_alloc0 (unsigned long size); |
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67 | void g_slice_free1 (unsigned long size, void *ptr); |
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68 | #elif PREFER_MALLOC |
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69 | # define g_slice_alloc0(s) calloc (1, (s)) |
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70 | # define g_slice_alloc(s) malloc ((s)) |
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71 | # define g_slice_free1(s,p) free ((p)) |
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72 | #endif |
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73 | |
14 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
74 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
15 | #define AUTODECL(var,expr) typeof(expr) var = (expr) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
16 | |
76 | |
17 | // makes dynamically allocated objects zero-initialised |
77 | // very ugly macro that basicaly declares and initialises a variable |
18 | struct zero_initialised |
78 | // that is in scope for the next statement only |
19 | { |
79 | // works only for stuff that can be assigned 0 and converts to false |
20 | void *operator new (size_t s, void *p) |
80 | // (note: works great for pointers) |
21 | { |
81 | // most ugly macro I ever wrote |
22 | memset (p, 0, s); |
82 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
23 | return p; |
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24 | } |
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25 | |
83 | |
26 | void *operator new (size_t s) |
84 | // in range including end |
27 | { |
85 | #define IN_RANGE_INC(val,beg,end) \ |
28 | return g_slice_alloc0 (s); |
86 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
29 | } |
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30 | |
87 | |
31 | void *operator new[] (size_t s) |
88 | // in range excluding end |
32 | { |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
33 | return g_slice_alloc0 (s); |
90 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
34 | } |
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35 | |
91 | |
36 | void operator delete (void *p, size_t s) |
92 | void cleanup (const char *cause, bool make_core = false); |
37 | { |
93 | void fork_abort (const char *msg); |
38 | g_slice_free1 (s, p); |
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39 | } |
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40 | |
94 | |
41 | void operator delete[] (void *p, size_t s) |
95 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
42 | { |
96 | // as a is often a constant while b is the variable. it is still a bug, though. |
43 | g_slice_free1 (s, p); |
97 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
44 | } |
98 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
45 | }; |
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; } |
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100 | |
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101 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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102 | |
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103 | 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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104 | 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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105 | |
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106 | template<typename T> |
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107 | static inline T |
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108 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
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109 | { |
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110 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
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111 | } |
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112 | |
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113 | // lots of stuff taken from FXT |
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114 | |
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115 | /* Rotate right. This is used in various places for checksumming */ |
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116 | //TODO: that sucks, use a better checksum algo |
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117 | static inline uint32_t |
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118 | rotate_right (uint32_t c, uint32_t count = 1) |
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119 | { |
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120 | return (c << (32 - count)) | (c >> count); |
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121 | } |
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122 | |
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123 | static inline uint32_t |
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124 | rotate_left (uint32_t c, uint32_t count = 1) |
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125 | { |
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126 | return (c >> (32 - count)) | (c << count); |
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127 | } |
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128 | |
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129 | // Return abs(a-b) |
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130 | // Both a and b must not have the most significant bit set |
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131 | static inline uint32_t |
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132 | upos_abs_diff (uint32_t a, uint32_t b) |
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133 | { |
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134 | long d1 = b - a; |
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135 | long d2 = (d1 & (d1 >> 31)) << 1; |
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136 | |
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137 | return d1 - d2; // == (b - d) - (a + d); |
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138 | } |
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139 | |
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140 | // Both a and b must not have the most significant bit set |
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141 | static inline uint32_t |
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142 | upos_min (uint32_t a, uint32_t b) |
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143 | { |
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144 | int32_t d = b - a; |
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145 | d &= d >> 31; |
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146 | return a + d; |
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147 | } |
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148 | |
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149 | // Both a and b must not have the most significant bit set |
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150 | static inline uint32_t |
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151 | upos_max (uint32_t a, uint32_t b) |
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152 | { |
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153 | int32_t d = b - a; |
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154 | d &= d >> 31; |
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155 | return b - d; |
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156 | } |
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157 | |
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158 | // this is much faster than crossfires original algorithm |
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159 | // on modern cpus |
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160 | inline int |
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161 | isqrt (int n) |
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162 | { |
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163 | return (int)sqrtf ((float)n); |
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164 | } |
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165 | |
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166 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
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167 | #if 0 |
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168 | // and has a max. error of 6 in the range -100..+100. |
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169 | #else |
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170 | // and has a max. error of 9 in the range -100..+100. |
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171 | #endif |
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172 | inline int |
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173 | idistance (int dx, int dy) |
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174 | { |
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175 | unsigned int dx_ = abs (dx); |
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176 | unsigned int dy_ = abs (dy); |
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177 | |
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178 | #if 0 |
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179 | return dx_ > dy_ |
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180 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
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181 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
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182 | #else |
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183 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
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184 | #endif |
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185 | } |
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186 | |
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187 | /* |
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188 | * absdir(int): Returns a number between 1 and 8, which represent |
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189 | * the "absolute" direction of a number (it actually takes care of |
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190 | * "overflow" in previous calculations of a direction). |
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191 | */ |
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192 | inline int |
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193 | absdir (int d) |
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194 | { |
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195 | return ((d - 1) & 7) + 1; |
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196 | } |
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197 | |
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198 | extern ssize_t slice_alloc; // statistics |
46 | |
199 | |
47 | void *salloc_ (int n) throw (std::bad_alloc); |
200 | void *salloc_ (int n) throw (std::bad_alloc); |
48 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
201 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
49 | |
202 | |
50 | // strictly the same as g_slice_alloc, but never returns 0 |
203 | // strictly the same as g_slice_alloc, but never returns 0 |
… | |
… | |
62 | |
215 | |
63 | // for symmetry |
216 | // for symmetry |
64 | template<typename T> |
217 | template<typename T> |
65 | inline void sfree (T *ptr, int n = 1) throw () |
218 | inline void sfree (T *ptr, int n = 1) throw () |
66 | { |
219 | { |
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220 | if (expect_true (ptr)) |
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221 | { |
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222 | slice_alloc -= n * sizeof (T); |
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223 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
67 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
224 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
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225 | assert (slice_alloc >= 0);//D |
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226 | } |
68 | } |
227 | } |
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228 | |
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229 | // makes dynamically allocated objects zero-initialised |
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230 | struct zero_initialised |
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231 | { |
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232 | void *operator new (size_t s, void *p) |
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233 | { |
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234 | memset (p, 0, s); |
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235 | return p; |
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236 | } |
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237 | |
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238 | void *operator new (size_t s) |
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239 | { |
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240 | return salloc0<char> (s); |
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241 | } |
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242 | |
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243 | void *operator new[] (size_t s) |
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244 | { |
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245 | return salloc0<char> (s); |
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246 | } |
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247 | |
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248 | void operator delete (void *p, size_t s) |
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249 | { |
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250 | sfree ((char *)p, s); |
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251 | } |
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252 | |
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253 | void operator delete[] (void *p, size_t s) |
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254 | { |
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255 | sfree ((char *)p, s); |
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256 | } |
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257 | }; |
69 | |
258 | |
70 | // a STL-compatible allocator that uses g_slice |
259 | // a STL-compatible allocator that uses g_slice |
71 | // boy, this is verbose |
260 | // boy, this is verbose |
72 | template<typename Tp> |
261 | template<typename Tp> |
73 | struct slice_allocator |
262 | struct slice_allocator |
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… | |
85 | { |
274 | { |
86 | typedef slice_allocator<U> other; |
275 | typedef slice_allocator<U> other; |
87 | }; |
276 | }; |
88 | |
277 | |
89 | slice_allocator () throw () { } |
278 | slice_allocator () throw () { } |
90 | slice_allocator (const slice_allocator &o) throw () { } |
279 | slice_allocator (const slice_allocator &) throw () { } |
91 | template<typename Tp2> |
280 | template<typename Tp2> |
92 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
281 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
93 | |
282 | |
94 | ~slice_allocator () { } |
283 | ~slice_allocator () { } |
95 | |
284 | |
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104 | void deallocate (pointer p, size_type n) |
293 | void deallocate (pointer p, size_type n) |
105 | { |
294 | { |
106 | sfree<Tp> (p, n); |
295 | sfree<Tp> (p, n); |
107 | } |
296 | } |
108 | |
297 | |
109 | size_type max_size ()const throw () |
298 | size_type max_size () const throw () |
110 | { |
299 | { |
111 | return size_t (-1) / sizeof (Tp); |
300 | return size_t (-1) / sizeof (Tp); |
112 | } |
301 | } |
113 | |
302 | |
114 | void construct (pointer p, const Tp &val) |
303 | void construct (pointer p, const Tp &val) |
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120 | { |
309 | { |
121 | p->~Tp (); |
310 | p->~Tp (); |
122 | } |
311 | } |
123 | }; |
312 | }; |
124 | |
313 | |
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314 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
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315 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
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316 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
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317 | struct tausworthe_random_generator |
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318 | { |
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319 | // generator |
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320 | uint32_t state [4]; |
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321 | |
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322 | void operator =(const tausworthe_random_generator &src) |
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323 | { |
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324 | state [0] = src.state [0]; |
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325 | state [1] = src.state [1]; |
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326 | state [2] = src.state [2]; |
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327 | state [3] = src.state [3]; |
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328 | } |
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329 | |
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330 | void seed (uint32_t seed); |
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331 | uint32_t next (); |
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332 | |
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333 | // uniform distribution |
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334 | uint32_t operator ()(uint32_t num) |
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335 | { |
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336 | return is_constant (num) |
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337 | ? (next () * (uint64_t)num) >> 32U |
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338 | : get_range (num); |
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339 | } |
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340 | |
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341 | // return a number within (min .. max) |
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342 | int operator () (int r_min, int r_max) |
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343 | { |
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344 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
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345 | ? r_min + operator ()(r_max - r_min + 1) |
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346 | : get_range (r_min, r_max); |
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347 | } |
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348 | |
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349 | double operator ()() |
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350 | { |
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351 | return this->next () / (double)0xFFFFFFFFU; |
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352 | } |
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353 | |
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354 | protected: |
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355 | uint32_t get_range (uint32_t r_max); |
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356 | int get_range (int r_min, int r_max); |
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357 | }; |
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358 | |
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359 | typedef tausworthe_random_generator rand_gen; |
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360 | |
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361 | extern rand_gen rndm; |
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362 | |
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363 | INTERFACE_CLASS (attachable) |
125 | struct refcounted |
364 | struct refcnt_base |
126 | { |
365 | { |
127 | refcounted () : refcnt (0) { } |
366 | typedef int refcnt_t; |
128 | virtual ~refcounted (); |
367 | mutable refcnt_t ACC (RW, refcnt); |
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368 | |
129 | void refcnt_inc () { ++refcnt; } |
369 | MTH void refcnt_inc () const { ++refcnt; } |
130 | void refcnt_dec () { --refcnt; } |
370 | MTH void refcnt_dec () const { --refcnt; } |
131 | bool dead () { return refcnt == 0; } |
371 | |
132 | mutable int refcnt; |
372 | refcnt_base () : refcnt (0) { } |
133 | #if 0 |
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134 | private: |
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135 | static refcounted *rc_first; |
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136 | refcounted *rc_next; |
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137 | #endif |
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138 | }; |
373 | }; |
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374 | |
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375 | // to avoid branches with more advanced compilers |
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376 | extern refcnt_base::refcnt_t refcnt_dummy; |
139 | |
377 | |
140 | template<class T> |
378 | template<class T> |
141 | struct refptr |
379 | struct refptr |
142 | { |
380 | { |
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381 | // p if not null |
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382 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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383 | |
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384 | void refcnt_dec () |
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385 | { |
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386 | if (!is_constant (p)) |
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387 | --*refcnt_ref (); |
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388 | else if (p) |
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389 | --p->refcnt; |
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390 | } |
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391 | |
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392 | void refcnt_inc () |
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393 | { |
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394 | if (!is_constant (p)) |
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395 | ++*refcnt_ref (); |
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396 | else if (p) |
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397 | ++p->refcnt; |
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398 | } |
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399 | |
143 | T *p; |
400 | T *p; |
144 | |
401 | |
145 | refptr () : p(0) { } |
402 | refptr () : p(0) { } |
146 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
403 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
147 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
404 | refptr (T *p) : p(p) { refcnt_inc (); } |
148 | ~refptr () { if (p) p->refcnt_dec (); } |
405 | ~refptr () { refcnt_dec (); } |
149 | |
406 | |
150 | const refptr<T> &operator =(T *o) |
407 | const refptr<T> &operator =(T *o) |
151 | { |
408 | { |
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409 | // if decrementing ever destroys we need to reverse the order here |
152 | if (p) p->refcnt_dec (); |
410 | refcnt_dec (); |
153 | p = o; |
411 | p = o; |
154 | if (p) p->refcnt_inc (); |
412 | refcnt_inc (); |
155 | |
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156 | return *this; |
413 | return *this; |
157 | } |
414 | } |
158 | |
415 | |
159 | const refptr<T> &operator =(const refptr<T> o) |
416 | const refptr<T> &operator =(const refptr<T> &o) |
160 | { |
417 | { |
161 | *this = o.p; |
418 | *this = o.p; |
162 | return *this; |
419 | return *this; |
163 | } |
420 | } |
164 | |
421 | |
165 | T &operator * () const { return *p; } |
422 | T &operator * () const { return *p; } |
166 | T *operator ->() const { return p; } |
423 | T *operator ->() const { return p; } |
167 | |
424 | |
168 | operator T *() const { return p; } |
425 | operator T *() const { return p; } |
169 | }; |
426 | }; |
170 | |
427 | |
171 | typedef refptr<player> player_ptr; |
428 | typedef refptr<maptile> maptile_ptr; |
172 | typedef refptr<object> object_ptr; |
429 | typedef refptr<object> object_ptr; |
173 | typedef refptr<archetype> arch_ptr; |
430 | typedef refptr<archetype> arch_ptr; |
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431 | typedef refptr<client> client_ptr; |
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432 | typedef refptr<player> player_ptr; |
174 | |
433 | |
175 | struct str_hash |
434 | struct str_hash |
176 | { |
435 | { |
177 | std::size_t operator ()(const char *s) const |
436 | std::size_t operator ()(const char *s) const |
178 | { |
437 | { |
… | |
… | |
204 | { |
463 | { |
205 | return !strcmp (a, b); |
464 | return !strcmp (a, b); |
206 | } |
465 | } |
207 | }; |
466 | }; |
208 | |
467 | |
209 | #include <vector> |
468 | // Mostly the same as std::vector, but insert/erase can reorder |
210 | |
469 | // the elements, making append(=insert)/remove O(1) instead of O(n). |
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470 | // |
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471 | // NOTE: only some forms of erase are available |
211 | template<class obj> |
472 | template<class T> |
212 | struct unordered_vector : std::vector<obj, slice_allocator<obj> > |
473 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
213 | { |
474 | { |
214 | typedef typename unordered_vector::iterator iterator; |
475 | typedef typename unordered_vector::iterator iterator; |
215 | |
476 | |
216 | void erase (unsigned int pos) |
477 | void erase (unsigned int pos) |
217 | { |
478 | { |
… | |
… | |
225 | { |
486 | { |
226 | erase ((unsigned int )(i - this->begin ())); |
487 | erase ((unsigned int )(i - this->begin ())); |
227 | } |
488 | } |
228 | }; |
489 | }; |
229 | |
490 | |
230 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
491 | // This container blends advantages of linked lists |
231 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
492 | // (efficiency) with vectors (random access) by |
232 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
493 | // by using an unordered vector and storing the vector |
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494 | // index inside the object. |
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495 | // |
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|
496 | // + memory-efficient on most 64 bit archs |
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497 | // + O(1) insert/remove |
|
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498 | // + free unique (but varying) id for inserted objects |
|
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499 | // + cache-friendly iteration |
|
|
500 | // - only works for pointers to structs |
|
|
501 | // |
|
|
502 | // NOTE: only some forms of erase/insert are available |
|
|
503 | typedef int object_vector_index; |
233 | |
504 | |
234 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
505 | template<class T, object_vector_index T::*indexmember> |
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|
506 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
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507 | { |
|
|
508 | typedef typename object_vector::iterator iterator; |
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509 | |
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|
510 | bool contains (const T *obj) const |
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511 | { |
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512 | return obj->*indexmember; |
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513 | } |
|
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514 | |
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|
515 | iterator find (const T *obj) |
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516 | { |
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517 | return obj->*indexmember |
|
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518 | ? this->begin () + obj->*indexmember - 1 |
|
|
519 | : this->end (); |
|
|
520 | } |
|
|
521 | |
|
|
522 | void push_back (T *obj) |
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523 | { |
|
|
524 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
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525 | obj->*indexmember = this->size (); |
|
|
526 | } |
|
|
527 | |
|
|
528 | void insert (T *obj) |
|
|
529 | { |
|
|
530 | push_back (obj); |
|
|
531 | } |
|
|
532 | |
|
|
533 | void insert (T &obj) |
|
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534 | { |
|
|
535 | insert (&obj); |
|
|
536 | } |
|
|
537 | |
|
|
538 | void erase (T *obj) |
|
|
539 | { |
|
|
540 | unsigned int pos = obj->*indexmember; |
|
|
541 | obj->*indexmember = 0; |
|
|
542 | |
|
|
543 | if (pos < this->size ()) |
|
|
544 | { |
|
|
545 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
|
|
546 | (*this)[pos - 1]->*indexmember = pos; |
|
|
547 | } |
|
|
548 | |
|
|
549 | this->pop_back (); |
|
|
550 | } |
|
|
551 | |
|
|
552 | void erase (T &obj) |
|
|
553 | { |
|
|
554 | erase (&obj); |
|
|
555 | } |
|
|
556 | }; |
235 | |
557 | |
236 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
558 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
237 | void assign (char *dst, const char *src, int maxlen); |
559 | void assign (char *dst, const char *src, int maxlen); |
238 | |
560 | |
239 | // type-safe version of assign |
561 | // type-safe version of assign |
… | |
… | |
243 | assign ((char *)&dst, src, N); |
565 | assign ((char *)&dst, src, N); |
244 | } |
566 | } |
245 | |
567 | |
246 | typedef double tstamp; |
568 | typedef double tstamp; |
247 | |
569 | |
248 | // return current time as timestampe |
570 | // return current time as timestamp |
249 | tstamp now (); |
571 | tstamp now (); |
250 | |
572 | |
|
|
573 | int similar_direction (int a, int b); |
|
|
574 | |
|
|
575 | // like sprintf, but returns a "static" buffer |
|
|
576 | const char *format (const char *format, ...); |
|
|
577 | |
|
|
578 | ///////////////////////////////////////////////////////////////////////////// |
|
|
579 | // threads, very very thin wrappers around pthreads |
|
|
580 | |
|
|
581 | struct thread |
|
|
582 | { |
|
|
583 | pthread_t id; |
|
|
584 | |
|
|
585 | void start (void *(*start_routine)(void *), void *arg = 0); |
|
|
586 | |
|
|
587 | void cancel () |
|
|
588 | { |
|
|
589 | pthread_cancel (id); |
|
|
590 | } |
|
|
591 | |
|
|
592 | void *join () |
|
|
593 | { |
|
|
594 | void *ret; |
|
|
595 | |
|
|
596 | if (pthread_join (id, &ret)) |
|
|
597 | cleanup ("pthread_join failed", 1); |
|
|
598 | |
|
|
599 | return ret; |
|
|
600 | } |
|
|
601 | }; |
|
|
602 | |
|
|
603 | // note that mutexes are not classes |
|
|
604 | typedef pthread_mutex_t smutex; |
|
|
605 | |
|
|
606 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
|
|
607 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
|
|
608 | #else |
|
|
609 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
251 | #endif |
610 | #endif |
252 | |
611 | |
|
|
612 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
|
|
613 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
|
|
614 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
|
|
615 | |
|
|
616 | typedef pthread_cond_t scond; |
|
|
617 | |
|
|
618 | #define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
|
|
619 | #define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
|
|
620 | #define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
|
|
621 | #define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
|
|
622 | |
|
|
623 | #endif |
|
|
624 | |