1 | /* |
1 | /* |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Deliantra 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 |
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18 | * <http://www.gnu.org/licenses/>. |
18 | * |
19 | * |
19 | * The authors can be reached via e-mail to <support@deliantra.net> |
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__ |
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25 | |
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26 | #include <compiler.h> |
24 | |
27 | |
25 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
28 | #define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
26 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
29 | #define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
27 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
30 | #define PREFER_MALLOC 0 // use malloc and not the slice allocator |
28 | |
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29 | #if __GNUC__ >= 3 |
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30 | # define is_constant(c) __builtin_constant_p (c) |
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31 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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32 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
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33 | #else |
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34 | # define is_constant(c) 0 |
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35 | # define expect(expr,value) (expr) |
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36 | # define prefetch(addr,rw,locality) |
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37 | #endif |
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38 | |
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39 | #if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
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40 | # define decltype(x) typeof(x) |
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41 | #endif |
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42 | |
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43 | // put into ifs if you are very sure that the expression |
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44 | // is mostly true or mosty false. note that these return |
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45 | // booleans, not the expression. |
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46 | #define expect_false(expr) expect ((expr) != 0, 0) |
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47 | #define expect_true(expr) expect ((expr) != 0, 1) |
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48 | |
31 | |
49 | #include <pthread.h> |
32 | #include <pthread.h> |
50 | |
33 | |
51 | #include <cstddef> |
34 | #include <cstddef> |
52 | #include <cmath> |
35 | #include <cmath> |
… | |
… | |
72 | #endif |
55 | #endif |
73 | |
56 | |
74 | // 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) |
75 | #define auto(var,expr) decltype(expr) var = (expr) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
76 | |
59 | |
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60 | #if cplusplus_does_not_suck /* still sucks in codesize with gcc 6, although local types work now */ |
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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 | |
77 | // very ugly macro that basicaly declares and initialises a variable |
71 | // very ugly macro that basically declares and initialises a variable |
78 | // that is in scope for the next statement only |
72 | // that is in scope for the next statement only |
79 | // 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 |
80 | // (note: works great for pointers) |
74 | // (note: works great for pointers) |
81 | // most ugly macro I ever wrote |
75 | // most ugly macro I ever wrote |
82 | #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) |
… | |
… | |
87 | |
81 | |
88 | // in range excluding end |
82 | // in range excluding end |
89 | #define IN_RANGE_EXC(val,beg,end) \ |
83 | #define IN_RANGE_EXC(val,beg,end) \ |
90 | ((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)) |
91 | |
85 | |
92 | void cleanup (const char *cause, bool make_core = false); |
86 | ecb_cold void cleanup (const char *cause, bool make_core = false); |
93 | void fork_abort (const char *msg); |
87 | ecb_cold void fork_abort (const char *msg); |
94 | |
88 | |
95 | // 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, |
96 | // 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. |
97 | 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; } |
98 | 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; } |
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; } |
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; } |
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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); } |
100 | |
98 | |
101 | 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; } |
102 | |
100 | |
103 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
101 | template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } |
104 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
102 | template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
105 | |
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 |
106 | template<typename T> |
146 | template<typename T> |
107 | static inline T |
147 | static inline T |
108 | 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) |
109 | { |
149 | { |
110 | 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); |
111 | } |
167 | } |
112 | |
168 | |
113 | // lots of stuff taken from FXT |
169 | // lots of stuff taken from FXT |
114 | |
170 | |
115 | /* Rotate right. This is used in various places for checksumming */ |
171 | /* Rotate right. This is used in various places for checksumming */ |
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153 | int32_t d = b - a; |
209 | int32_t d = b - a; |
154 | d &= d >> 31; |
210 | d &= d >> 31; |
155 | return b - d; |
211 | return b - d; |
156 | } |
212 | } |
157 | |
213 | |
158 | // this is much faster than crossfires original algorithm |
214 | // this is much faster than crossfire's original algorithm |
159 | // on modern cpus |
215 | // on modern cpus |
160 | inline int |
216 | inline int |
161 | isqrt (int n) |
217 | isqrt (int n) |
162 | { |
218 | { |
163 | 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; |
164 | } |
234 | } |
165 | |
235 | |
166 | // 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) |
167 | #if 0 |
237 | #if 0 |
168 | // 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. |
169 | #else |
239 | #else |
170 | // and has a max. error of 9 in the range -100..+100. |
240 | // and has a max. error of 9 in the range -100..+100. |
171 | #endif |
241 | #endif |
172 | inline int |
242 | inline int |
173 | idistance (int dx, int dy) |
243 | idistance (int dx, int dy) |
174 | { |
244 | { |
175 | unsigned int dx_ = abs (dx); |
245 | unsigned int dx_ = abs (dx); |
176 | unsigned int dy_ = abs (dy); |
246 | unsigned int dy_ = abs (dy); |
177 | |
247 | |
178 | #if 0 |
248 | #if 0 |
179 | return dx_ > dy_ |
249 | return dx_ > dy_ |
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182 | #else |
252 | #else |
183 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
253 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
184 | #endif |
254 | #endif |
185 | } |
255 | } |
186 | |
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 | |
187 | /* |
277 | /* |
188 | * absdir(int): Returns a number between 1 and 8, which represent |
278 | * absdir(int): Returns a number between 1 and 8, which represent |
189 | * the "absolute" direction of a number (it actually takes care of |
279 | * the "absolute" direction of a number (it actually takes care of |
190 | * "overflow" in previous calculations of a direction). |
280 | * "overflow" in previous calculations of a direction). |
191 | */ |
281 | */ |
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193 | absdir (int d) |
283 | absdir (int d) |
194 | { |
284 | { |
195 | return ((d - 1) & 7) + 1; |
285 | return ((d - 1) & 7) + 1; |
196 | } |
286 | } |
197 | |
287 | |
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288 | #define for_all_bits_sparse_32(mask, idxvar) \ |
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289 | for (uint32_t idxvar, mask_ = mask; \ |
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290 | mask_ && ((idxvar = ecb_ctz32 (mask_)), mask_ &= ~(1 << idxvar), 1);) |
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291 | |
198 | extern ssize_t slice_alloc; // statistics |
292 | extern ssize_t slice_alloc; // statistics |
199 | |
293 | |
200 | void *salloc_ (int n) throw (std::bad_alloc); |
294 | void *salloc_ (int n); |
201 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
295 | void *salloc_ (int n, void *src); |
202 | |
296 | |
203 | // strictly the same as g_slice_alloc, but never returns 0 |
297 | // strictly the same as g_slice_alloc, but never returns 0 |
204 | template<typename T> |
298 | template<typename T> |
205 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
299 | inline T *salloc (int n = 1) { return (T *)salloc_ (n * sizeof (T)); } |
206 | |
300 | |
207 | // also copies src into the new area, like "memdup" |
301 | // also copies src into the new area, like "memdup" |
208 | // if src is 0, clears the memory |
302 | // if src is 0, clears the memory |
209 | template<typename T> |
303 | template<typename T> |
210 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
304 | inline T *salloc (int n, T *src) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
211 | |
305 | |
212 | // clears the memory |
306 | // clears the memory |
213 | template<typename T> |
307 | template<typename T> |
214 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
308 | inline T *salloc0(int n = 1) { return (T *)salloc_ (n * sizeof (T), 0); } |
215 | |
309 | |
216 | // for symmetry |
310 | // for symmetry |
217 | template<typename T> |
311 | template<typename T> |
218 | inline void sfree (T *ptr, int n = 1) throw () |
312 | inline void sfree (T *ptr, int n = 1) noexcept |
219 | { |
313 | { |
220 | if (expect_true (ptr)) |
314 | if (expect_true (ptr)) |
221 | { |
315 | { |
222 | slice_alloc -= n * sizeof (T); |
316 | slice_alloc -= n * sizeof (T); |
223 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
317 | if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
224 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
318 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
225 | assert (slice_alloc >= 0);//D |
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226 | } |
319 | } |
227 | } |
320 | } |
228 | |
321 | |
229 | // nulls the pointer |
322 | // nulls the pointer |
230 | template<typename T> |
323 | template<typename T> |
231 | inline void sfree0 (T *&ptr, int n = 1) throw () |
324 | inline void sfree0 (T *&ptr, int n = 1) noexcept |
232 | { |
325 | { |
233 | sfree<T> (ptr, n); |
326 | sfree<T> (ptr, n); |
234 | ptr = 0; |
327 | ptr = 0; |
235 | } |
328 | } |
236 | |
329 | |
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… | |
249 | } |
342 | } |
250 | |
343 | |
251 | void *operator new[] (size_t s) |
344 | void *operator new[] (size_t s) |
252 | { |
345 | { |
253 | return salloc0<char> (s); |
346 | return salloc0<char> (s); |
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347 | } |
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348 | |
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349 | void operator delete (void *p, size_t s) |
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350 | { |
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351 | sfree ((char *)p, s); |
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352 | } |
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353 | |
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354 | void operator delete[] (void *p, size_t s) |
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355 | { |
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356 | sfree ((char *)p, s); |
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357 | } |
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358 | }; |
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359 | |
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360 | // makes dynamically allocated objects zero-initialised |
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361 | struct slice_allocated |
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362 | { |
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363 | void *operator new (size_t s, void *p) |
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364 | { |
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365 | return p; |
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366 | } |
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367 | |
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368 | void *operator new (size_t s) |
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369 | { |
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370 | return salloc<char> (s); |
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371 | } |
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372 | |
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373 | void *operator new[] (size_t s) |
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374 | { |
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375 | return salloc<char> (s); |
254 | } |
376 | } |
255 | |
377 | |
256 | void operator delete (void *p, size_t s) |
378 | void operator delete (void *p, size_t s) |
257 | { |
379 | { |
258 | sfree ((char *)p, s); |
380 | sfree ((char *)p, s); |
… | |
… | |
275 | typedef const Tp *const_pointer; |
397 | typedef const Tp *const_pointer; |
276 | typedef Tp &reference; |
398 | typedef Tp &reference; |
277 | typedef const Tp &const_reference; |
399 | typedef const Tp &const_reference; |
278 | typedef Tp value_type; |
400 | typedef Tp value_type; |
279 | |
401 | |
280 | template <class U> |
402 | template <class U> |
281 | struct rebind |
403 | struct rebind |
282 | { |
404 | { |
283 | typedef slice_allocator<U> other; |
405 | typedef slice_allocator<U> other; |
284 | }; |
406 | }; |
285 | |
407 | |
286 | slice_allocator () throw () { } |
408 | slice_allocator () noexcept { } |
287 | slice_allocator (const slice_allocator &) throw () { } |
409 | slice_allocator (const slice_allocator &) noexcept { } |
288 | template<typename Tp2> |
410 | template<typename Tp2> |
289 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
411 | slice_allocator (const slice_allocator<Tp2> &) noexcept { } |
290 | |
412 | |
291 | ~slice_allocator () { } |
413 | ~slice_allocator () { } |
292 | |
414 | |
293 | pointer address (reference x) const { return &x; } |
415 | pointer address (reference x) const { return &x; } |
294 | const_pointer address (const_reference x) const { return &x; } |
416 | const_pointer address (const_reference x) const { return &x; } |
… | |
… | |
301 | void deallocate (pointer p, size_type n) |
423 | void deallocate (pointer p, size_type n) |
302 | { |
424 | { |
303 | sfree<Tp> (p, n); |
425 | sfree<Tp> (p, n); |
304 | } |
426 | } |
305 | |
427 | |
306 | size_type max_size () const throw () |
428 | size_type max_size () const noexcept |
307 | { |
429 | { |
308 | return size_t (-1) / sizeof (Tp); |
430 | return size_t (-1) / sizeof (Tp); |
309 | } |
431 | } |
310 | |
432 | |
311 | void construct (pointer p, const Tp &val) |
433 | void construct (pointer p, const Tp &val) |
… | |
… | |
317 | { |
439 | { |
318 | p->~Tp (); |
440 | p->~Tp (); |
319 | } |
441 | } |
320 | }; |
442 | }; |
321 | |
443 | |
322 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
444 | // basically a memory area, but refcounted |
323 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
445 | struct refcnt_buf |
324 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
|
|
325 | struct tausworthe_random_generator |
|
|
326 | { |
446 | { |
327 | // generator |
447 | char *data; |
328 | uint32_t state [4]; |
|
|
329 | |
448 | |
330 | void operator =(const tausworthe_random_generator &src) |
449 | refcnt_buf (size_t size = 0); |
331 | { |
450 | refcnt_buf (void *data, size_t size); |
332 | state [0] = src.state [0]; |
|
|
333 | state [1] = src.state [1]; |
|
|
334 | state [2] = src.state [2]; |
|
|
335 | state [3] = src.state [3]; |
|
|
336 | } |
|
|
337 | |
451 | |
338 | void seed (uint32_t seed); |
452 | refcnt_buf (const refcnt_buf &src) |
339 | uint32_t next (); |
|
|
340 | |
|
|
341 | // uniform distribution |
|
|
342 | uint32_t operator ()(uint32_t num) |
|
|
343 | { |
453 | { |
344 | return is_constant (num) |
454 | data = src.data; |
345 | ? (next () * (uint64_t)num) >> 32U |
455 | inc (); |
346 | : get_range (num); |
|
|
347 | } |
456 | } |
348 | |
457 | |
349 | // return a number within (min .. max) |
458 | ~refcnt_buf (); |
350 | int operator () (int r_min, int r_max) |
|
|
351 | { |
|
|
352 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
|
|
353 | ? r_min + operator ()(r_max - r_min + 1) |
|
|
354 | : get_range (r_min, r_max); |
|
|
355 | } |
|
|
356 | |
459 | |
357 | double operator ()() |
460 | refcnt_buf &operator =(const refcnt_buf &src); |
|
|
461 | |
|
|
462 | operator char *() |
358 | { |
463 | { |
359 | return this->next () / (double)0xFFFFFFFFU; |
464 | return data; |
|
|
465 | } |
|
|
466 | |
|
|
467 | size_t size () const |
|
|
468 | { |
|
|
469 | return _size (); |
360 | } |
470 | } |
361 | |
471 | |
362 | protected: |
472 | protected: |
363 | uint32_t get_range (uint32_t r_max); |
473 | enum { |
364 | int get_range (int r_min, int r_max); |
474 | overhead = sizeof (uint32_t) * 2 |
365 | }; |
475 | }; |
366 | |
476 | |
367 | typedef tausworthe_random_generator rand_gen; |
477 | uint32_t &_size () const |
|
|
478 | { |
|
|
479 | return ((unsigned int *)data)[-2]; |
|
|
480 | } |
368 | |
481 | |
369 | extern rand_gen rndm; |
482 | uint32_t &_refcnt () const |
|
|
483 | { |
|
|
484 | return ((unsigned int *)data)[-1]; |
|
|
485 | } |
|
|
486 | |
|
|
487 | void _alloc (uint32_t size) |
|
|
488 | { |
|
|
489 | data = ((char *)salloc<char> (size + overhead)) + overhead; |
|
|
490 | _size () = size; |
|
|
491 | _refcnt () = 1; |
|
|
492 | } |
|
|
493 | |
|
|
494 | void _dealloc (); |
|
|
495 | |
|
|
496 | void inc () |
|
|
497 | { |
|
|
498 | ++_refcnt (); |
|
|
499 | } |
|
|
500 | |
|
|
501 | void dec () |
|
|
502 | { |
|
|
503 | if (!--_refcnt ()) |
|
|
504 | _dealloc (); |
|
|
505 | } |
|
|
506 | }; |
370 | |
507 | |
371 | INTERFACE_CLASS (attachable) |
508 | INTERFACE_CLASS (attachable) |
372 | struct refcnt_base |
509 | struct refcnt_base |
373 | { |
510 | { |
374 | typedef int refcnt_t; |
511 | typedef int refcnt_t; |
… | |
… | |
389 | // p if not null |
526 | // p if not null |
390 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
527 | refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
391 | |
528 | |
392 | void refcnt_dec () |
529 | void refcnt_dec () |
393 | { |
530 | { |
394 | if (!is_constant (p)) |
531 | if (!ecb_is_constant (p)) |
395 | --*refcnt_ref (); |
532 | --*refcnt_ref (); |
396 | else if (p) |
533 | else if (p) |
397 | --p->refcnt; |
534 | --p->refcnt; |
398 | } |
535 | } |
399 | |
536 | |
400 | void refcnt_inc () |
537 | void refcnt_inc () |
401 | { |
538 | { |
402 | if (!is_constant (p)) |
539 | if (!ecb_is_constant (p)) |
403 | ++*refcnt_ref (); |
540 | ++*refcnt_ref (); |
404 | else if (p) |
541 | else if (p) |
405 | ++p->refcnt; |
542 | ++p->refcnt; |
406 | } |
543 | } |
407 | |
544 | |
… | |
… | |
436 | typedef refptr<maptile> maptile_ptr; |
573 | typedef refptr<maptile> maptile_ptr; |
437 | typedef refptr<object> object_ptr; |
574 | typedef refptr<object> object_ptr; |
438 | typedef refptr<archetype> arch_ptr; |
575 | typedef refptr<archetype> arch_ptr; |
439 | typedef refptr<client> client_ptr; |
576 | typedef refptr<client> client_ptr; |
440 | typedef refptr<player> player_ptr; |
577 | typedef refptr<player> player_ptr; |
|
|
578 | typedef refptr<region> region_ptr; |
|
|
579 | |
|
|
580 | #define STRHSH_NULL 2166136261 |
|
|
581 | |
|
|
582 | static inline uint32_t |
|
|
583 | strhsh (const char *s) |
|
|
584 | { |
|
|
585 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
|
|
586 | // it is about twice as fast as the one-at-a-time one, |
|
|
587 | // with good distribution. |
|
|
588 | // FNV-1a is faster on many cpus because the multiplication |
|
|
589 | // runs concurrently with the looping logic. |
|
|
590 | // we modify the hash a bit to improve its distribution |
|
|
591 | uint32_t hash = STRHSH_NULL; |
|
|
592 | |
|
|
593 | while (*s) |
|
|
594 | hash = (hash ^ *s++) * 16777619U; |
|
|
595 | |
|
|
596 | return hash ^ (hash >> 16); |
|
|
597 | } |
|
|
598 | |
|
|
599 | static inline uint32_t |
|
|
600 | memhsh (const char *s, size_t len) |
|
|
601 | { |
|
|
602 | uint32_t hash = STRHSH_NULL; |
|
|
603 | |
|
|
604 | while (len--) |
|
|
605 | hash = (hash ^ *s++) * 16777619U; |
|
|
606 | |
|
|
607 | return hash; |
|
|
608 | } |
441 | |
609 | |
442 | struct str_hash |
610 | struct str_hash |
443 | { |
611 | { |
444 | std::size_t operator ()(const char *s) const |
612 | std::size_t operator ()(const char *s) const |
445 | { |
613 | { |
446 | unsigned long hash = 0; |
|
|
447 | |
|
|
448 | /* use the one-at-a-time hash function, which supposedly is |
|
|
449 | * better than the djb2-like one used by perl5.005, but |
|
|
450 | * certainly is better then the bug used here before. |
|
|
451 | * see http://burtleburtle.net/bob/hash/doobs.html |
|
|
452 | */ |
|
|
453 | while (*s) |
|
|
454 | { |
|
|
455 | hash += *s++; |
|
|
456 | hash += hash << 10; |
|
|
457 | hash ^= hash >> 6; |
|
|
458 | } |
|
|
459 | |
|
|
460 | hash += hash << 3; |
|
|
461 | hash ^= hash >> 11; |
|
|
462 | hash += hash << 15; |
|
|
463 | |
|
|
464 | return hash; |
614 | return strhsh (s); |
|
|
615 | } |
|
|
616 | |
|
|
617 | std::size_t operator ()(const shstr &s) const |
|
|
618 | { |
|
|
619 | return strhsh (s); |
465 | } |
620 | } |
466 | }; |
621 | }; |
467 | |
622 | |
468 | struct str_equal |
623 | struct str_equal |
469 | { |
624 | { |
… | |
… | |
496 | } |
651 | } |
497 | }; |
652 | }; |
498 | |
653 | |
499 | // This container blends advantages of linked lists |
654 | // This container blends advantages of linked lists |
500 | // (efficiency) with vectors (random access) by |
655 | // (efficiency) with vectors (random access) by |
501 | // by using an unordered vector and storing the vector |
656 | // using an unordered vector and storing the vector |
502 | // index inside the object. |
657 | // index inside the object. |
503 | // |
658 | // |
504 | // + memory-efficient on most 64 bit archs |
659 | // + memory-efficient on most 64 bit archs |
505 | // + O(1) insert/remove |
660 | // + O(1) insert/remove |
506 | // + free unique (but varying) id for inserted objects |
661 | // + free unique (but varying) id for inserted objects |
… | |
… | |
543 | insert (&obj); |
698 | insert (&obj); |
544 | } |
699 | } |
545 | |
700 | |
546 | void erase (T *obj) |
701 | void erase (T *obj) |
547 | { |
702 | { |
548 | unsigned int pos = obj->*indexmember; |
703 | object_vector_index pos = obj->*indexmember; |
549 | obj->*indexmember = 0; |
704 | obj->*indexmember = 0; |
550 | |
705 | |
551 | if (pos < this->size ()) |
706 | if (pos < this->size ()) |
552 | { |
707 | { |
553 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
708 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
… | |
… | |
561 | { |
716 | { |
562 | erase (&obj); |
717 | erase (&obj); |
563 | } |
718 | } |
564 | }; |
719 | }; |
565 | |
720 | |
|
|
721 | ///////////////////////////////////////////////////////////////////////////// |
|
|
722 | |
|
|
723 | // something like a vector or stack, but without |
|
|
724 | // out of bounds checking |
|
|
725 | template<typename T> |
|
|
726 | struct fixed_stack |
|
|
727 | { |
|
|
728 | T *data; |
|
|
729 | int size; |
|
|
730 | int max; |
|
|
731 | |
|
|
732 | fixed_stack () |
|
|
733 | : size (0), data (0) |
|
|
734 | { |
|
|
735 | } |
|
|
736 | |
|
|
737 | fixed_stack (int max) |
|
|
738 | : size (0), max (max) |
|
|
739 | { |
|
|
740 | data = salloc<T> (max); |
|
|
741 | } |
|
|
742 | |
|
|
743 | void reset (int new_max) |
|
|
744 | { |
|
|
745 | sfree (data, max); |
|
|
746 | size = 0; |
|
|
747 | max = new_max; |
|
|
748 | data = salloc<T> (max); |
|
|
749 | } |
|
|
750 | |
|
|
751 | void free () |
|
|
752 | { |
|
|
753 | sfree (data, max); |
|
|
754 | data = 0; |
|
|
755 | } |
|
|
756 | |
|
|
757 | ~fixed_stack () |
|
|
758 | { |
|
|
759 | sfree (data, max); |
|
|
760 | } |
|
|
761 | |
|
|
762 | T &operator[](int idx) |
|
|
763 | { |
|
|
764 | return data [idx]; |
|
|
765 | } |
|
|
766 | |
|
|
767 | void push (T v) |
|
|
768 | { |
|
|
769 | data [size++] = v; |
|
|
770 | } |
|
|
771 | |
|
|
772 | T &pop () |
|
|
773 | { |
|
|
774 | return data [--size]; |
|
|
775 | } |
|
|
776 | |
|
|
777 | T remove (int idx) |
|
|
778 | { |
|
|
779 | T v = data [idx]; |
|
|
780 | |
|
|
781 | data [idx] = data [--size]; |
|
|
782 | |
|
|
783 | return v; |
|
|
784 | } |
|
|
785 | }; |
|
|
786 | |
|
|
787 | ///////////////////////////////////////////////////////////////////////////// |
|
|
788 | |
566 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
789 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
|
|
790 | // returns the number of bytes actually used (including \0) |
567 | void assign (char *dst, const char *src, int maxlen); |
791 | int assign (char *dst, const char *src, int maxsize); |
568 | |
792 | |
569 | // type-safe version of assign |
793 | // type-safe version of assign |
570 | template<int N> |
794 | template<int N> |
571 | inline void assign (char (&dst)[N], const char *src) |
795 | inline int assign (char (&dst)[N], const char *src) |
572 | { |
796 | { |
573 | assign ((char *)&dst, src, N); |
797 | return assign ((char *)&dst, src, N); |
574 | } |
798 | } |
575 | |
799 | |
576 | typedef double tstamp; |
800 | typedef double tstamp; |
577 | |
801 | |
578 | // return current time as timestamp |
802 | // return current time as timestamp |
579 | tstamp now (); |
803 | tstamp now (); |
580 | |
804 | |
581 | int similar_direction (int a, int b); |
805 | int similar_direction (int a, int b); |
582 | |
806 | |
583 | // like sprintf, but returns a "static" buffer |
807 | // like v?sprintf, but returns a "static" buffer |
584 | const char *format (const char *format, ...); |
808 | char *vformat (const char *format, va_list ap); |
|
|
809 | char *format (const char *format, ...) ecb_attribute ((format (printf, 1, 2))); |
|
|
810 | |
|
|
811 | // safety-check player input which will become object->msg |
|
|
812 | bool msg_is_safe (const char *msg); |
585 | |
813 | |
586 | ///////////////////////////////////////////////////////////////////////////// |
814 | ///////////////////////////////////////////////////////////////////////////// |
587 | // threads, very very thin wrappers around pthreads |
815 | // threads, very very thin wrappers around pthreads |
588 | |
816 | |
589 | struct thread |
817 | struct thread |