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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_SALLOC 0 |
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26 | #define PREFER_MALLOC 0 |
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27 | |
4 | #if __GNUC__ >= 3 |
28 | #if __GNUC__ >= 3 |
5 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define is_constant(c) __builtin_constant_p (c) |
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30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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31 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
6 | #else |
32 | #else |
7 | # define is_constant(c) 0 |
33 | # define is_constant(c) 0 |
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34 | # define expect(expr,value) (expr) |
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35 | # define prefetch(addr,rw,locality) |
8 | #endif |
36 | #endif |
9 | |
37 | |
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38 | #if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
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39 | # define decltype(x) typeof(x) |
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40 | #endif |
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41 | |
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42 | // put into ifs if you are very sure that the expression |
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43 | // is mostly true or mosty false. note that these return |
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44 | // booleans, not the expression. |
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45 | #define expect_false(expr) expect ((expr) != 0, 0) |
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46 | #define expect_true(expr) expect ((expr) != 0, 1) |
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47 | |
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48 | #include <pthread.h> |
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49 | |
10 | #include <cstddef> |
50 | #include <cstddef> |
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51 | #include <cmath> |
11 | #include <new> |
52 | #include <new> |
12 | #include <vector> |
53 | #include <vector> |
13 | |
54 | |
14 | #include <glib.h> |
55 | #include <glib.h> |
15 | |
56 | |
16 | #include <shstr.h> |
57 | #include <shstr.h> |
17 | #include <traits.h> |
58 | #include <traits.h> |
18 | |
59 | |
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60 | #if DEBUG_SALLOC |
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61 | # define g_slice_alloc0(s) debug_slice_alloc0(s) |
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62 | # define g_slice_alloc(s) debug_slice_alloc(s) |
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63 | # define g_slice_free1(s,p) debug_slice_free1(s,p) |
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64 | void *g_slice_alloc (unsigned long size); |
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65 | void *g_slice_alloc0 (unsigned long size); |
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66 | void g_slice_free1 (unsigned long size, void *ptr); |
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67 | #elif PREFER_MALLOC |
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68 | # define g_slice_alloc0(s) calloc (1, (s)) |
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69 | # define g_slice_alloc(s) malloc ((s)) |
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70 | # define g_slice_free1(s,p) free ((s)) |
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71 | #endif |
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72 | |
19 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
73 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
20 | #define AUTODECL(var,expr) typeof(expr) var = (expr) |
74 | #define auto(var,expr) decltype(expr) var = (expr) |
21 | |
75 | |
22 | // very ugly macro that basicaly declares and initialises a variable |
76 | // very ugly macro that basicaly declares and initialises a variable |
23 | // that is in scope for the next statement only |
77 | // that is in scope for the next statement only |
24 | // works only for stuff that can be assigned 0 and converts to false |
78 | // works only for stuff that can be assigned 0 and converts to false |
25 | // (note: works great for pointers) |
79 | // (note: works great for pointers) |
26 | // most ugly macro I ever wrote |
80 | // most ugly macro I ever wrote |
27 | #define declvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
81 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
28 | |
82 | |
29 | // makes dynamically allocated objects zero-initialised |
83 | // in range including end |
30 | struct zero_initialised |
84 | #define IN_RANGE_INC(val,beg,end) \ |
31 | { |
85 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
32 | void *operator new (size_t s, void *p) |
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33 | { |
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34 | memset (p, 0, s); |
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35 | return p; |
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36 | } |
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37 | |
86 | |
38 | void *operator new (size_t s) |
87 | // in range excluding end |
39 | { |
88 | #define IN_RANGE_EXC(val,beg,end) \ |
40 | return g_slice_alloc0 (s); |
89 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
41 | } |
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42 | |
90 | |
43 | void *operator new[] (size_t s) |
91 | void cleanup (const char *cause, bool make_core = false); |
44 | { |
92 | void fork_abort (const char *msg); |
45 | return g_slice_alloc0 (s); |
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46 | } |
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47 | |
93 | |
48 | void operator delete (void *p, size_t s) |
94 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
49 | { |
95 | // as a is often a constant while b is the variable. it is still a bug, though. |
50 | g_slice_free1 (s, p); |
96 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
51 | } |
97 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
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98 | 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; } |
52 | |
99 | |
53 | void operator delete[] (void *p, size_t s) |
100 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
54 | { |
101 | |
55 | g_slice_free1 (s, p); |
102 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
56 | } |
103 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
57 | }; |
104 | |
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105 | template<typename T> |
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106 | static inline T |
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107 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
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108 | { |
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109 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
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110 | } |
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111 | |
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112 | // lots of stuff taken from FXT |
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113 | |
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114 | /* Rotate right. This is used in various places for checksumming */ |
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115 | //TODO: that sucks, use a better checksum algo |
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116 | static inline uint32_t |
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117 | rotate_right (uint32_t c, uint32_t count = 1) |
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118 | { |
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119 | return (c << (32 - count)) | (c >> count); |
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120 | } |
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121 | |
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122 | static inline uint32_t |
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123 | rotate_left (uint32_t c, uint32_t count = 1) |
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124 | { |
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125 | return (c >> (32 - count)) | (c << count); |
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126 | } |
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127 | |
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128 | // Return abs(a-b) |
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129 | // Both a and b must not have the most significant bit set |
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130 | static inline uint32_t |
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131 | upos_abs_diff (uint32_t a, uint32_t b) |
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132 | { |
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133 | long d1 = b - a; |
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134 | long d2 = (d1 & (d1 >> 31)) << 1; |
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135 | |
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136 | return d1 - d2; // == (b - d) - (a + d); |
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137 | } |
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138 | |
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139 | // Both a and b must not have the most significant bit set |
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140 | static inline uint32_t |
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141 | upos_min (uint32_t a, uint32_t b) |
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142 | { |
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143 | int32_t d = b - a; |
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144 | d &= d >> 31; |
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145 | return a + d; |
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146 | } |
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147 | |
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148 | // Both a and b must not have the most significant bit set |
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149 | static inline uint32_t |
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150 | upos_max (uint32_t a, uint32_t b) |
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151 | { |
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152 | int32_t d = b - a; |
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153 | d &= d >> 31; |
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154 | return b - d; |
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155 | } |
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156 | |
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157 | // this is much faster than crossfires original algorithm |
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158 | // on modern cpus |
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159 | inline int |
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160 | isqrt (int n) |
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161 | { |
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162 | return (int)sqrtf ((float)n); |
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163 | } |
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164 | |
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165 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
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166 | #if 0 |
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167 | // and has a max. error of 6 in the range -100..+100. |
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168 | #else |
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169 | // and has a max. error of 9 in the range -100..+100. |
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170 | #endif |
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171 | inline int |
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172 | idistance (int dx, int dy) |
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173 | { |
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174 | unsigned int dx_ = abs (dx); |
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175 | unsigned int dy_ = abs (dy); |
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176 | |
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177 | #if 0 |
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178 | return dx_ > dy_ |
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179 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
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180 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
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181 | #else |
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182 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
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183 | #endif |
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184 | } |
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185 | |
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186 | /* |
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187 | * absdir(int): Returns a number between 1 and 8, which represent |
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188 | * the "absolute" direction of a number (it actually takes care of |
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189 | * "overflow" in previous calculations of a direction). |
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190 | */ |
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191 | inline int |
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192 | absdir (int d) |
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193 | { |
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194 | return ((d - 1) & 7) + 1; |
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195 | } |
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196 | |
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197 | extern ssize_t slice_alloc; // statistics |
58 | |
198 | |
59 | void *salloc_ (int n) throw (std::bad_alloc); |
199 | void *salloc_ (int n) throw (std::bad_alloc); |
60 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
200 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
61 | |
201 | |
62 | // strictly the same as g_slice_alloc, but never returns 0 |
202 | // strictly the same as g_slice_alloc, but never returns 0 |
… | |
… | |
74 | |
214 | |
75 | // for symmetry |
215 | // for symmetry |
76 | template<typename T> |
216 | template<typename T> |
77 | inline void sfree (T *ptr, int n = 1) throw () |
217 | inline void sfree (T *ptr, int n = 1) throw () |
78 | { |
218 | { |
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219 | if (expect_true (ptr)) |
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220 | { |
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221 | slice_alloc -= n * sizeof (T); |
79 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
222 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
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223 | assert (slice_alloc >= 0);//D |
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224 | } |
80 | } |
225 | } |
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226 | |
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227 | // makes dynamically allocated objects zero-initialised |
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228 | struct zero_initialised |
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229 | { |
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230 | void *operator new (size_t s, void *p) |
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231 | { |
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232 | memset (p, 0, s); |
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233 | return p; |
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234 | } |
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235 | |
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236 | void *operator new (size_t s) |
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237 | { |
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238 | return salloc0<char> (s); |
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239 | } |
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240 | |
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241 | void *operator new[] (size_t s) |
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242 | { |
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243 | return salloc0<char> (s); |
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244 | } |
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245 | |
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246 | void operator delete (void *p, size_t s) |
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247 | { |
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248 | sfree ((char *)p, s); |
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249 | } |
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250 | |
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251 | void operator delete[] (void *p, size_t s) |
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252 | { |
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253 | sfree ((char *)p, s); |
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254 | } |
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255 | }; |
81 | |
256 | |
82 | // a STL-compatible allocator that uses g_slice |
257 | // a STL-compatible allocator that uses g_slice |
83 | // boy, this is verbose |
258 | // boy, this is verbose |
84 | template<typename Tp> |
259 | template<typename Tp> |
85 | struct slice_allocator |
260 | struct slice_allocator |
… | |
… | |
97 | { |
272 | { |
98 | typedef slice_allocator<U> other; |
273 | typedef slice_allocator<U> other; |
99 | }; |
274 | }; |
100 | |
275 | |
101 | slice_allocator () throw () { } |
276 | slice_allocator () throw () { } |
102 | slice_allocator (const slice_allocator &o) throw () { } |
277 | slice_allocator (const slice_allocator &) throw () { } |
103 | template<typename Tp2> |
278 | template<typename Tp2> |
104 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
279 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
105 | |
280 | |
106 | ~slice_allocator () { } |
281 | ~slice_allocator () { } |
107 | |
282 | |
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116 | void deallocate (pointer p, size_type n) |
291 | void deallocate (pointer p, size_type n) |
117 | { |
292 | { |
118 | sfree<Tp> (p, n); |
293 | sfree<Tp> (p, n); |
119 | } |
294 | } |
120 | |
295 | |
121 | size_type max_size ()const throw () |
296 | size_type max_size () const throw () |
122 | { |
297 | { |
123 | return size_t (-1) / sizeof (Tp); |
298 | return size_t (-1) / sizeof (Tp); |
124 | } |
299 | } |
125 | |
300 | |
126 | void construct (pointer p, const Tp &val) |
301 | void construct (pointer p, const Tp &val) |
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131 | void destroy (pointer p) |
306 | void destroy (pointer p) |
132 | { |
307 | { |
133 | p->~Tp (); |
308 | p->~Tp (); |
134 | } |
309 | } |
135 | }; |
310 | }; |
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311 | |
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312 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
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313 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
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314 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
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315 | struct tausworthe_random_generator |
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316 | { |
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317 | // generator |
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318 | uint32_t state [4]; |
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319 | |
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320 | void operator =(const tausworthe_random_generator &src) |
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321 | { |
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322 | state [0] = src.state [0]; |
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323 | state [1] = src.state [1]; |
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324 | state [2] = src.state [2]; |
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325 | state [3] = src.state [3]; |
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326 | } |
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327 | |
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328 | void seed (uint32_t seed); |
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329 | uint32_t next (); |
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330 | |
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331 | // uniform distribution |
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332 | uint32_t operator ()(uint32_t num) |
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333 | { |
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334 | return is_constant (num) |
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335 | ? (next () * (uint64_t)num) >> 32U |
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336 | : get_range (num); |
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337 | } |
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338 | |
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339 | // return a number within (min .. max) |
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340 | int operator () (int r_min, int r_max) |
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341 | { |
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342 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
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343 | ? r_min + operator ()(r_max - r_min + 1) |
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344 | : get_range (r_min, r_max); |
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345 | } |
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346 | |
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347 | double operator ()() |
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348 | { |
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349 | return this->next () / (double)0xFFFFFFFFU; |
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350 | } |
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351 | |
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352 | protected: |
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353 | uint32_t get_range (uint32_t r_max); |
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354 | int get_range (int r_min, int r_max); |
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355 | }; |
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356 | |
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357 | typedef tausworthe_random_generator rand_gen; |
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358 | |
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359 | extern rand_gen rndm; |
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360 | |
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361 | INTERFACE_CLASS (attachable) |
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362 | struct refcnt_base |
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363 | { |
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364 | typedef int refcnt_t; |
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365 | mutable refcnt_t ACC (RW, refcnt); |
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366 | |
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367 | MTH void refcnt_inc () const { ++refcnt; } |
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368 | MTH void refcnt_dec () const { --refcnt; } |
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369 | |
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370 | refcnt_base () : refcnt (0) { } |
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371 | }; |
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372 | |
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373 | // to avoid branches with more advanced compilers |
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374 | extern refcnt_base::refcnt_t refcnt_dummy; |
136 | |
375 | |
137 | template<class T> |
376 | template<class T> |
138 | struct refptr |
377 | struct refptr |
139 | { |
378 | { |
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379 | // p if not null |
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380 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
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381 | |
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382 | void refcnt_dec () |
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383 | { |
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384 | if (!is_constant (p)) |
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385 | --*refcnt_ref (); |
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386 | else if (p) |
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387 | --p->refcnt; |
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388 | } |
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389 | |
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390 | void refcnt_inc () |
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391 | { |
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392 | if (!is_constant (p)) |
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393 | ++*refcnt_ref (); |
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394 | else if (p) |
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395 | ++p->refcnt; |
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396 | } |
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397 | |
140 | T *p; |
398 | T *p; |
141 | |
399 | |
142 | refptr () : p(0) { } |
400 | refptr () : p(0) { } |
143 | refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); } |
401 | refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
144 | refptr (T *p) : p(p) { if (p) p->refcnt_inc (); } |
402 | refptr (T *p) : p(p) { refcnt_inc (); } |
145 | ~refptr () { if (p) p->refcnt_dec (); } |
403 | ~refptr () { refcnt_dec (); } |
146 | |
404 | |
147 | const refptr<T> &operator =(T *o) |
405 | const refptr<T> &operator =(T *o) |
148 | { |
406 | { |
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407 | // if decrementing ever destroys we need to reverse the order here |
149 | if (p) p->refcnt_dec (); |
408 | refcnt_dec (); |
150 | p = o; |
409 | p = o; |
151 | if (p) p->refcnt_inc (); |
410 | refcnt_inc (); |
152 | |
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153 | return *this; |
411 | return *this; |
154 | } |
412 | } |
155 | |
413 | |
156 | const refptr<T> &operator =(const refptr<T> o) |
414 | const refptr<T> &operator =(const refptr<T> &o) |
157 | { |
415 | { |
158 | *this = o.p; |
416 | *this = o.p; |
159 | return *this; |
417 | return *this; |
160 | } |
418 | } |
161 | |
419 | |
162 | T &operator * () const { return *p; } |
420 | T &operator * () const { return *p; } |
163 | T *operator ->() const { return p; } |
421 | T *operator ->() const { return p; } |
164 | |
422 | |
165 | operator T *() const { return p; } |
423 | operator T *() const { return p; } |
166 | }; |
424 | }; |
167 | |
425 | |
168 | typedef refptr<maptile> maptile_ptr; |
426 | typedef refptr<maptile> maptile_ptr; |
… | |
… | |
203 | { |
461 | { |
204 | return !strcmp (a, b); |
462 | return !strcmp (a, b); |
205 | } |
463 | } |
206 | }; |
464 | }; |
207 | |
465 | |
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466 | // Mostly the same as std::vector, but insert/erase can reorder |
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467 | // the elements, making append(=insert)/remove O(1) instead of O(n). |
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468 | // |
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469 | // NOTE: only some forms of erase are available |
208 | template<class T> |
470 | template<class T> |
209 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
471 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
210 | { |
472 | { |
211 | typedef typename unordered_vector::iterator iterator; |
473 | typedef typename unordered_vector::iterator iterator; |
212 | |
474 | |
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222 | { |
484 | { |
223 | erase ((unsigned int )(i - this->begin ())); |
485 | erase ((unsigned int )(i - this->begin ())); |
224 | } |
486 | } |
225 | }; |
487 | }; |
226 | |
488 | |
227 | template<class T, int T::* index> |
489 | // This container blends advantages of linked lists |
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490 | // (efficiency) with vectors (random access) by |
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491 | // by using an unordered vector and storing the vector |
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492 | // index inside the object. |
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493 | // |
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494 | // + memory-efficient on most 64 bit archs |
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495 | // + O(1) insert/remove |
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496 | // + free unique (but varying) id for inserted objects |
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497 | // + cache-friendly iteration |
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498 | // - only works for pointers to structs |
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499 | // |
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500 | // NOTE: only some forms of erase/insert are available |
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501 | typedef int object_vector_index; |
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502 | |
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503 | template<class T, object_vector_index T::*indexmember> |
228 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
504 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
229 | { |
505 | { |
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506 | typedef typename object_vector::iterator iterator; |
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507 | |
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508 | bool contains (const T *obj) const |
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509 | { |
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510 | return obj->*indexmember; |
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511 | } |
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512 | |
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513 | iterator find (const T *obj) |
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514 | { |
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515 | return obj->*indexmember |
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516 | ? this->begin () + obj->*indexmember - 1 |
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517 | : this->end (); |
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518 | } |
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519 | |
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520 | void push_back (T *obj) |
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521 | { |
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522 | std::vector<T *, slice_allocator<T *> >::push_back (obj); |
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523 | obj->*indexmember = this->size (); |
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524 | } |
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525 | |
230 | void insert (T *obj) |
526 | void insert (T *obj) |
231 | { |
527 | { |
232 | assert (!(obj->*index)); |
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233 | push_back (obj); |
528 | push_back (obj); |
234 | obj->*index = this->size (); |
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235 | } |
529 | } |
236 | |
530 | |
237 | void insert (T &obj) |
531 | void insert (T &obj) |
238 | { |
532 | { |
239 | insert (&obj); |
533 | insert (&obj); |
240 | } |
534 | } |
241 | |
535 | |
242 | void erase (T *obj) |
536 | void erase (T *obj) |
243 | { |
537 | { |
244 | assert (obj->*index); |
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245 | int pos = obj->*index; |
538 | unsigned int pos = obj->*indexmember; |
246 | obj->*index = 0; |
539 | obj->*indexmember = 0; |
247 | |
540 | |
248 | if (pos < this->size ()) |
541 | if (pos < this->size ()) |
249 | { |
542 | { |
250 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
543 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
251 | (*this)[pos - 1]->*index = pos; |
544 | (*this)[pos - 1]->*indexmember = pos; |
252 | } |
545 | } |
253 | |
546 | |
254 | this->pop_back (); |
547 | this->pop_back (); |
255 | } |
548 | } |
256 | |
549 | |
257 | void erase (T &obj) |
550 | void erase (T &obj) |
258 | { |
551 | { |
259 | errase (&obj); |
552 | erase (&obj); |
260 | } |
553 | } |
261 | }; |
554 | }; |
262 | |
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263 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
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264 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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265 | 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; } |
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266 | |
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267 | 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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268 | |
555 | |
269 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
556 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
270 | void assign (char *dst, const char *src, int maxlen); |
557 | void assign (char *dst, const char *src, int maxlen); |
271 | |
558 | |
272 | // type-safe version of assign |
559 | // type-safe version of assign |
… | |
… | |
276 | assign ((char *)&dst, src, N); |
563 | assign ((char *)&dst, src, N); |
277 | } |
564 | } |
278 | |
565 | |
279 | typedef double tstamp; |
566 | typedef double tstamp; |
280 | |
567 | |
281 | // return current time as timestampe |
568 | // return current time as timestamp |
282 | tstamp now (); |
569 | tstamp now (); |
283 | |
570 | |
284 | int similar_direction (int a, int b); |
571 | int similar_direction (int a, int b); |
285 | |
572 | |
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573 | // like sprintf, but returns a "static" buffer |
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574 | const char *format (const char *format, ...); |
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575 | |
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576 | ///////////////////////////////////////////////////////////////////////////// |
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577 | // threads, very very thin wrappers around pthreads |
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578 | |
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579 | struct thread |
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580 | { |
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581 | pthread_t id; |
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582 | |
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583 | void start (void *(*start_routine)(void *), void *arg = 0); |
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584 | |
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585 | void cancel () |
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586 | { |
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587 | pthread_cancel (id); |
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588 | } |
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589 | |
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590 | void *join () |
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591 | { |
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592 | void *ret; |
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593 | |
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594 | if (pthread_join (id, &ret)) |
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595 | cleanup ("pthread_join failed", 1); |
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596 | |
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597 | return ret; |
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598 | } |
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599 | }; |
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600 | |
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601 | // note that mutexes are not classes |
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602 | typedef pthread_mutex_t smutex; |
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603 | |
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604 | #if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
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605 | #define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
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606 | #else |
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607 | #define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
286 | #endif |
608 | #endif |
287 | |
609 | |
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610 | #define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
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611 | #define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
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612 | #define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
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613 | |
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614 | #endif |
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615 | |