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1.46 |
/* |
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1.58 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
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1.120 |
* |
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1.127 |
* Copyright (©) 2017,2018 Marc Alexander Lehmann / the Deliantra team |
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* Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
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1.120 |
* |
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1.90 |
* Deliantra is free software: you can redistribute it and/or modify it under |
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* the terms of the Affero GNU General Public License as published by the |
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* Free Software Foundation, either version 3 of the License, or (at your |
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* option) any later version. |
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1.120 |
* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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1.120 |
* |
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1.90 |
* You should have received a copy of the Affero GNU General Public License |
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* and the GNU General Public License along with this program. If not, see |
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* <http://www.gnu.org/licenses/>. |
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1.120 |
* |
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* The authors can be reached via e-mail to <support@deliantra.net> |
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1.46 |
*/ |
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1.1 |
#ifndef UTIL_H__ |
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#define UTIL_H__ |
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1.93 |
#include <compiler.h> |
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1.71 |
#define DEBUG_POISON 0x00 // poison memory before freeing it if != 0 |
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#define DEBUG_SALLOC 0 // add a debug wrapper around all sallocs |
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#define PREFER_MALLOC 0 // use malloc and not the slice allocator |
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#include <pthread.h> |
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#include <cstddef> |
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1.28 |
#include <cmath> |
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1.25 |
#include <new> |
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#include <vector> |
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#include <glib.h> |
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#include <flat_hash_map.hpp> |
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#include <shstr.h> |
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#include <traits.h> |
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#if DEBUG_SALLOC |
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# define g_slice_alloc0(s) debug_slice_alloc0(s) |
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# define g_slice_alloc(s) debug_slice_alloc(s) |
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# define g_slice_free1(s,p) debug_slice_free1(s,p) |
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void *g_slice_alloc (unsigned long size); |
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void *g_slice_alloc0 (unsigned long size); |
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void g_slice_free1 (unsigned long size, void *ptr); |
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#elif PREFER_MALLOC |
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# define g_slice_alloc0(s) calloc (1, (s)) |
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# define g_slice_alloc(s) malloc ((s)) |
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# define g_slice_free1(s,p) free ((p)) |
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#endif |
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// use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
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#define auto(var,expr) decltype(expr) var = (expr) |
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1.14 |
|
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#if cplusplus_does_not_suck /* still sucks in codesize with gcc 6, although local types work now */ |
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// does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
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template<typename T, int N> |
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static inline int array_length (const T (&arr)[N]) |
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{ |
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return N; |
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} |
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#else |
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#define array_length(name) (sizeof (name) / sizeof (name [0])) |
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#endif |
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|
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// very ugly macro that basically declares and initialises a variable |
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// that is in scope for the next statement only |
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// works only for stuff that can be assigned 0 and converts to false |
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// (note: works great for pointers) |
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// most ugly macro I ever wrote |
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#define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
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|
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// in range including end |
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#define IN_RANGE_INC(val,beg,end) \ |
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((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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// in range excluding end |
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#define IN_RANGE_EXC(val,beg,end) \ |
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((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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ecb_cold void cleanup (const char *cause, bool make_core = false); |
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ecb_cold void fork_abort (const char *msg); |
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1.31 |
|
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// rationale for using (U) not (T) is to reduce signed/unsigned issues, |
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// as a is often a constant while b is the variable. it is still a bug, though. |
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template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
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template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
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1.35 |
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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1.32 |
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98 |
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1.80 |
template<typename T, typename U> static inline void min_it (T &v, U m) { v = min (v, (T)m); } |
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template<typename T, typename U> static inline void max_it (T &v, U m) { v = max (v, (T)m); } |
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template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = clamp (v, (T)a, (T)b); } |
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1.78 |
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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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1.63 |
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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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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1.79 |
// sign returns -1 or +1 |
108 |
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template<typename T> |
109 |
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static inline T sign (T v) { return v < 0 ? -1 : +1; } |
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// relies on 2c representation |
111 |
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template<> |
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1.103 |
inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
113 |
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template<> |
114 |
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inline sint16 sign (sint16 v) { return 1 - (sint16 (uint16 (v) >> 15) * 2); } |
115 |
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template<> |
116 |
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inline sint32 sign (sint32 v) { return 1 - (sint32 (uint32 (v) >> 31) * 2); } |
117 |
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1.79 |
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// sign0 returns -1, 0 or +1 |
119 |
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template<typename T> |
120 |
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static inline T sign0 (T v) { return v ? sign (v) : 0; } |
121 |
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122 |
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1.113 |
//clashes with C++0x |
123 |
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1.99 |
template<typename T, typename U> |
124 |
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static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
125 |
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126 |
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1.88 |
// div* only work correctly for div > 0 |
127 |
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1.78 |
// div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
128 |
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1.88 |
template<typename T> static inline T div (T val, T div) |
129 |
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{ |
130 |
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return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
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} |
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1.105 |
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133 |
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template<> inline float div (float val, float div) { return val / div; } |
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template<> inline double div (double val, double div) { return val / div; } |
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136 |
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1.78 |
// div, round-up |
137 |
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1.88 |
template<typename T> static inline T div_ru (T val, T div) |
138 |
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{ |
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return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
140 |
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} |
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1.78 |
// div, round-down |
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1.88 |
template<typename T> static inline T div_rd (T val, T div) |
143 |
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{ |
144 |
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return expect_false (val < 0) ? - ((-val + (div - 1) ) / div) : (val ) / div; |
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} |
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1.78 |
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1.88 |
// lerp* only work correctly for min_in < max_in |
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// Linear intERPolate, scales val from min_in..max_in to min_out..max_out |
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1.44 |
template<typename T> |
150 |
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static inline T |
151 |
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lerp (T val, T min_in, T max_in, T min_out, T max_out) |
152 |
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{ |
153 |
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1.78 |
return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
154 |
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} |
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// lerp, round-down |
157 |
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template<typename T> |
158 |
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static inline T |
159 |
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lerp_rd (T val, T min_in, T max_in, T min_out, T max_out) |
160 |
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{ |
161 |
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return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
162 |
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} |
163 |
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// lerp, round-up |
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template<typename T> |
166 |
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static inline T |
167 |
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lerp_ru (T val, T min_in, T max_in, T min_out, T max_out) |
168 |
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{ |
169 |
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return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in); |
170 |
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1.44 |
} |
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1.37 |
// lots of stuff taken from FXT |
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174 |
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/* Rotate right. This is used in various places for checksumming */ |
175 |
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1.38 |
//TODO: that sucks, use a better checksum algo |
176 |
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1.37 |
static inline uint32_t |
177 |
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1.38 |
rotate_right (uint32_t c, uint32_t count = 1) |
178 |
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1.37 |
{ |
179 |
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1.38 |
return (c << (32 - count)) | (c >> count); |
180 |
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} |
181 |
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182 |
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static inline uint32_t |
183 |
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rotate_left (uint32_t c, uint32_t count = 1) |
184 |
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{ |
185 |
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return (c >> (32 - count)) | (c << count); |
186 |
root |
1.37 |
} |
187 |
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188 |
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// Return abs(a-b) |
189 |
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// Both a and b must not have the most significant bit set |
190 |
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static inline uint32_t |
191 |
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upos_abs_diff (uint32_t a, uint32_t b) |
192 |
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{ |
193 |
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long d1 = b - a; |
194 |
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long d2 = (d1 & (d1 >> 31)) << 1; |
195 |
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196 |
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return d1 - d2; // == (b - d) - (a + d); |
197 |
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} |
198 |
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199 |
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// Both a and b must not have the most significant bit set |
200 |
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static inline uint32_t |
201 |
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upos_min (uint32_t a, uint32_t b) |
202 |
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{ |
203 |
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int32_t d = b - a; |
204 |
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d &= d >> 31; |
205 |
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return a + d; |
206 |
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} |
207 |
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208 |
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// Both a and b must not have the most significant bit set |
209 |
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static inline uint32_t |
210 |
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upos_max (uint32_t a, uint32_t b) |
211 |
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{ |
212 |
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int32_t d = b - a; |
213 |
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d &= d >> 31; |
214 |
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return b - d; |
215 |
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} |
216 |
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217 |
root |
1.94 |
// this is much faster than crossfire's original algorithm |
218 |
root |
1.28 |
// on modern cpus |
219 |
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inline int |
220 |
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isqrt (int n) |
221 |
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{ |
222 |
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return (int)sqrtf ((float)n); |
223 |
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} |
224 |
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225 |
root |
1.92 |
// this is kind of like the ^^ operator, if it would exist, without sequence point. |
226 |
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// more handy than it looks like, due to the implicit !! done on its arguments |
227 |
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inline bool |
228 |
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logical_xor (bool a, bool b) |
229 |
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{ |
230 |
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return a != b; |
231 |
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} |
232 |
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233 |
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inline bool |
234 |
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logical_implies (bool a, bool b) |
235 |
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{ |
236 |
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return a <= b; |
237 |
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} |
238 |
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239 |
root |
1.28 |
// this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
240 |
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#if 0 |
241 |
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// and has a max. error of 6 in the range -100..+100. |
242 |
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#else |
243 |
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// and has a max. error of 9 in the range -100..+100. |
244 |
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#endif |
245 |
root |
1.122 |
inline int |
246 |
root |
1.28 |
idistance (int dx, int dy) |
247 |
root |
1.122 |
{ |
248 |
root |
1.28 |
unsigned int dx_ = abs (dx); |
249 |
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unsigned int dy_ = abs (dy); |
250 |
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251 |
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#if 0 |
252 |
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return dx_ > dy_ |
253 |
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? (dx_ * 61685 + dy_ * 26870) >> 16 |
254 |
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: (dy_ * 61685 + dx_ * 26870) >> 16; |
255 |
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#else |
256 |
root |
1.30 |
return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
257 |
root |
1.28 |
#endif |
258 |
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} |
259 |
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260 |
root |
1.115 |
// can be substantially faster than floor, if your value range allows for it |
261 |
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template<typename T> |
262 |
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inline T |
263 |
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fastfloor (T x) |
264 |
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{ |
265 |
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return std::floor (x); |
266 |
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} |
267 |
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268 |
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inline float |
269 |
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fastfloor (float x) |
270 |
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{ |
271 |
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return sint32(x) - (x < 0); |
272 |
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} |
273 |
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274 |
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inline double |
275 |
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fastfloor (double x) |
276 |
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{ |
277 |
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return sint64(x) - (x < 0); |
278 |
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} |
279 |
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280 |
root |
1.29 |
/* |
281 |
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* absdir(int): Returns a number between 1 and 8, which represent |
282 |
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* the "absolute" direction of a number (it actually takes care of |
283 |
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* "overflow" in previous calculations of a direction). |
284 |
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*/ |
285 |
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inline int |
286 |
|
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absdir (int d) |
287 |
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{ |
288 |
|
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return ((d - 1) & 7) + 1; |
289 |
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} |
290 |
root |
1.28 |
|
291 |
root |
1.96 |
#define for_all_bits_sparse_32(mask, idxvar) \ |
292 |
|
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for (uint32_t idxvar, mask_ = mask; \ |
293 |
root |
1.126 |
mask_ && ((idxvar = ecb_ctz32 (mask_)), mask_ &= ~(1 << idxvar), 1);) |
294 |
root |
1.96 |
|
295 |
root |
1.67 |
extern ssize_t slice_alloc; // statistics |
296 |
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297 |
root |
1.125 |
void *salloc_ (int n); |
298 |
|
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void *salloc_ (int n, void *src); |
299 |
root |
1.67 |
|
300 |
|
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// strictly the same as g_slice_alloc, but never returns 0 |
301 |
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template<typename T> |
302 |
root |
1.125 |
inline T *salloc (int n = 1) { return (T *)salloc_ (n * sizeof (T)); } |
303 |
root |
1.67 |
|
304 |
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// also copies src into the new area, like "memdup" |
305 |
|
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// if src is 0, clears the memory |
306 |
|
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template<typename T> |
307 |
root |
1.125 |
inline T *salloc (int n, T *src) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
308 |
root |
1.67 |
|
309 |
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// clears the memory |
310 |
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template<typename T> |
311 |
root |
1.125 |
inline T *salloc0(int n = 1) { return (T *)salloc_ (n * sizeof (T), 0); } |
312 |
root |
1.67 |
|
313 |
|
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// for symmetry |
314 |
|
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template<typename T> |
315 |
root |
1.125 |
inline void sfree (T *ptr, int n = 1) noexcept |
316 |
root |
1.67 |
{ |
317 |
|
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if (expect_true (ptr)) |
318 |
|
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{ |
319 |
|
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slice_alloc -= n * sizeof (T); |
320 |
root |
1.70 |
if (DEBUG_POISON) memset (ptr, DEBUG_POISON, n * sizeof (T)); |
321 |
root |
1.67 |
g_slice_free1 (n * sizeof (T), (void *)ptr); |
322 |
|
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} |
323 |
|
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} |
324 |
root |
1.57 |
|
325 |
root |
1.72 |
// nulls the pointer |
326 |
|
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template<typename T> |
327 |
root |
1.125 |
inline void sfree0 (T *&ptr, int n = 1) noexcept |
328 |
root |
1.72 |
{ |
329 |
|
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sfree<T> (ptr, n); |
330 |
|
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ptr = 0; |
331 |
|
|
} |
332 |
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|
333 |
root |
1.1 |
// makes dynamically allocated objects zero-initialised |
334 |
|
|
struct zero_initialised |
335 |
|
|
{ |
336 |
root |
1.11 |
void *operator new (size_t s, void *p) |
337 |
|
|
{ |
338 |
|
|
memset (p, 0, s); |
339 |
|
|
return p; |
340 |
|
|
} |
341 |
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342 |
|
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void *operator new (size_t s) |
343 |
|
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{ |
344 |
root |
1.67 |
return salloc0<char> (s); |
345 |
root |
1.11 |
} |
346 |
|
|
|
347 |
|
|
void *operator new[] (size_t s) |
348 |
|
|
{ |
349 |
root |
1.67 |
return salloc0<char> (s); |
350 |
root |
1.11 |
} |
351 |
|
|
|
352 |
|
|
void operator delete (void *p, size_t s) |
353 |
|
|
{ |
354 |
root |
1.67 |
sfree ((char *)p, s); |
355 |
root |
1.11 |
} |
356 |
|
|
|
357 |
|
|
void operator delete[] (void *p, size_t s) |
358 |
|
|
{ |
359 |
root |
1.67 |
sfree ((char *)p, s); |
360 |
root |
1.11 |
} |
361 |
|
|
}; |
362 |
|
|
|
363 |
root |
1.73 |
// makes dynamically allocated objects zero-initialised |
364 |
|
|
struct slice_allocated |
365 |
|
|
{ |
366 |
|
|
void *operator new (size_t s, void *p) |
367 |
|
|
{ |
368 |
|
|
return p; |
369 |
|
|
} |
370 |
|
|
|
371 |
|
|
void *operator new (size_t s) |
372 |
|
|
{ |
373 |
|
|
return salloc<char> (s); |
374 |
|
|
} |
375 |
|
|
|
376 |
|
|
void *operator new[] (size_t s) |
377 |
|
|
{ |
378 |
|
|
return salloc<char> (s); |
379 |
|
|
} |
380 |
|
|
|
381 |
|
|
void operator delete (void *p, size_t s) |
382 |
|
|
{ |
383 |
|
|
sfree ((char *)p, s); |
384 |
|
|
} |
385 |
|
|
|
386 |
|
|
void operator delete[] (void *p, size_t s) |
387 |
|
|
{ |
388 |
|
|
sfree ((char *)p, s); |
389 |
|
|
} |
390 |
|
|
}; |
391 |
|
|
|
392 |
root |
1.11 |
// a STL-compatible allocator that uses g_slice |
393 |
|
|
// boy, this is verbose |
394 |
|
|
template<typename Tp> |
395 |
|
|
struct slice_allocator |
396 |
|
|
{ |
397 |
|
|
typedef size_t size_type; |
398 |
|
|
typedef ptrdiff_t difference_type; |
399 |
|
|
typedef Tp *pointer; |
400 |
|
|
typedef const Tp *const_pointer; |
401 |
|
|
typedef Tp &reference; |
402 |
|
|
typedef const Tp &const_reference; |
403 |
|
|
typedef Tp value_type; |
404 |
|
|
|
405 |
root |
1.122 |
template <class U> |
406 |
root |
1.11 |
struct rebind |
407 |
|
|
{ |
408 |
|
|
typedef slice_allocator<U> other; |
409 |
|
|
}; |
410 |
|
|
|
411 |
root |
1.125 |
slice_allocator () noexcept { } |
412 |
|
|
slice_allocator (const slice_allocator &) noexcept { } |
413 |
root |
1.11 |
template<typename Tp2> |
414 |
root |
1.125 |
slice_allocator (const slice_allocator<Tp2> &) noexcept { } |
415 |
root |
1.11 |
|
416 |
|
|
~slice_allocator () { } |
417 |
|
|
|
418 |
|
|
pointer address (reference x) const { return &x; } |
419 |
|
|
const_pointer address (const_reference x) const { return &x; } |
420 |
|
|
|
421 |
|
|
pointer allocate (size_type n, const_pointer = 0) |
422 |
|
|
{ |
423 |
root |
1.18 |
return salloc<Tp> (n); |
424 |
root |
1.11 |
} |
425 |
|
|
|
426 |
|
|
void deallocate (pointer p, size_type n) |
427 |
|
|
{ |
428 |
root |
1.19 |
sfree<Tp> (p, n); |
429 |
root |
1.11 |
} |
430 |
|
|
|
431 |
root |
1.125 |
size_type max_size () const noexcept |
432 |
root |
1.11 |
{ |
433 |
|
|
return size_t (-1) / sizeof (Tp); |
434 |
|
|
} |
435 |
|
|
|
436 |
|
|
void construct (pointer p, const Tp &val) |
437 |
|
|
{ |
438 |
|
|
::new (p) Tp (val); |
439 |
|
|
} |
440 |
|
|
|
441 |
|
|
void destroy (pointer p) |
442 |
|
|
{ |
443 |
|
|
p->~Tp (); |
444 |
|
|
} |
445 |
root |
1.1 |
}; |
446 |
|
|
|
447 |
root |
1.117 |
// basically a memory area, but refcounted |
448 |
|
|
struct refcnt_buf |
449 |
|
|
{ |
450 |
|
|
char *data; |
451 |
|
|
|
452 |
|
|
refcnt_buf (size_t size = 0); |
453 |
|
|
refcnt_buf (void *data, size_t size); |
454 |
|
|
|
455 |
|
|
refcnt_buf (const refcnt_buf &src) |
456 |
|
|
{ |
457 |
|
|
data = src.data; |
458 |
root |
1.121 |
inc (); |
459 |
root |
1.117 |
} |
460 |
|
|
|
461 |
|
|
~refcnt_buf (); |
462 |
|
|
|
463 |
|
|
refcnt_buf &operator =(const refcnt_buf &src); |
464 |
|
|
|
465 |
|
|
operator char *() |
466 |
|
|
{ |
467 |
|
|
return data; |
468 |
|
|
} |
469 |
|
|
|
470 |
|
|
size_t size () const |
471 |
|
|
{ |
472 |
|
|
return _size (); |
473 |
|
|
} |
474 |
|
|
|
475 |
|
|
protected: |
476 |
|
|
enum { |
477 |
root |
1.121 |
overhead = sizeof (uint32_t) * 2 |
478 |
root |
1.117 |
}; |
479 |
|
|
|
480 |
root |
1.121 |
uint32_t &_size () const |
481 |
root |
1.117 |
{ |
482 |
|
|
return ((unsigned int *)data)[-2]; |
483 |
|
|
} |
484 |
|
|
|
485 |
root |
1.121 |
uint32_t &_refcnt () const |
486 |
root |
1.117 |
{ |
487 |
|
|
return ((unsigned int *)data)[-1]; |
488 |
|
|
} |
489 |
|
|
|
490 |
root |
1.121 |
void _alloc (uint32_t size) |
491 |
root |
1.117 |
{ |
492 |
|
|
data = ((char *)salloc<char> (size + overhead)) + overhead; |
493 |
|
|
_size () = size; |
494 |
|
|
_refcnt () = 1; |
495 |
|
|
} |
496 |
|
|
|
497 |
root |
1.121 |
void _dealloc (); |
498 |
|
|
|
499 |
|
|
void inc () |
500 |
|
|
{ |
501 |
|
|
++_refcnt (); |
502 |
|
|
} |
503 |
|
|
|
504 |
root |
1.117 |
void dec () |
505 |
|
|
{ |
506 |
|
|
if (!--_refcnt ()) |
507 |
root |
1.121 |
_dealloc (); |
508 |
root |
1.117 |
} |
509 |
|
|
}; |
510 |
|
|
|
511 |
root |
1.54 |
INTERFACE_CLASS (attachable) |
512 |
|
|
struct refcnt_base |
513 |
|
|
{ |
514 |
|
|
typedef int refcnt_t; |
515 |
|
|
mutable refcnt_t ACC (RW, refcnt); |
516 |
|
|
|
517 |
|
|
MTH void refcnt_inc () const { ++refcnt; } |
518 |
|
|
MTH void refcnt_dec () const { --refcnt; } |
519 |
|
|
|
520 |
|
|
refcnt_base () : refcnt (0) { } |
521 |
|
|
}; |
522 |
|
|
|
523 |
root |
1.56 |
// to avoid branches with more advanced compilers |
524 |
root |
1.54 |
extern refcnt_base::refcnt_t refcnt_dummy; |
525 |
|
|
|
526 |
root |
1.7 |
template<class T> |
527 |
|
|
struct refptr |
528 |
|
|
{ |
529 |
root |
1.54 |
// p if not null |
530 |
|
|
refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
531 |
|
|
|
532 |
|
|
void refcnt_dec () |
533 |
|
|
{ |
534 |
root |
1.126 |
if (!ecb_is_constant (p)) |
535 |
root |
1.54 |
--*refcnt_ref (); |
536 |
|
|
else if (p) |
537 |
|
|
--p->refcnt; |
538 |
|
|
} |
539 |
|
|
|
540 |
|
|
void refcnt_inc () |
541 |
|
|
{ |
542 |
root |
1.126 |
if (!ecb_is_constant (p)) |
543 |
root |
1.54 |
++*refcnt_ref (); |
544 |
|
|
else if (p) |
545 |
|
|
++p->refcnt; |
546 |
|
|
} |
547 |
|
|
|
548 |
root |
1.7 |
T *p; |
549 |
|
|
|
550 |
|
|
refptr () : p(0) { } |
551 |
root |
1.54 |
refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
552 |
|
|
refptr (T *p) : p(p) { refcnt_inc (); } |
553 |
|
|
~refptr () { refcnt_dec (); } |
554 |
root |
1.7 |
|
555 |
|
|
const refptr<T> &operator =(T *o) |
556 |
|
|
{ |
557 |
root |
1.54 |
// if decrementing ever destroys we need to reverse the order here |
558 |
|
|
refcnt_dec (); |
559 |
root |
1.7 |
p = o; |
560 |
root |
1.54 |
refcnt_inc (); |
561 |
root |
1.7 |
return *this; |
562 |
|
|
} |
563 |
|
|
|
564 |
root |
1.54 |
const refptr<T> &operator =(const refptr<T> &o) |
565 |
root |
1.7 |
{ |
566 |
|
|
*this = o.p; |
567 |
|
|
return *this; |
568 |
|
|
} |
569 |
|
|
|
570 |
|
|
T &operator * () const { return *p; } |
571 |
root |
1.54 |
T *operator ->() const { return p; } |
572 |
root |
1.7 |
|
573 |
|
|
operator T *() const { return p; } |
574 |
|
|
}; |
575 |
|
|
|
576 |
root |
1.24 |
typedef refptr<maptile> maptile_ptr; |
577 |
root |
1.22 |
typedef refptr<object> object_ptr; |
578 |
|
|
typedef refptr<archetype> arch_ptr; |
579 |
root |
1.24 |
typedef refptr<client> client_ptr; |
580 |
|
|
typedef refptr<player> player_ptr; |
581 |
root |
1.102 |
typedef refptr<region> region_ptr; |
582 |
root |
1.22 |
|
583 |
root |
1.95 |
#define STRHSH_NULL 2166136261 |
584 |
|
|
|
585 |
|
|
static inline uint32_t |
586 |
|
|
strhsh (const char *s) |
587 |
|
|
{ |
588 |
|
|
// use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
589 |
|
|
// it is about twice as fast as the one-at-a-time one, |
590 |
|
|
// with good distribution. |
591 |
|
|
// FNV-1a is faster on many cpus because the multiplication |
592 |
|
|
// runs concurrently with the looping logic. |
593 |
root |
1.112 |
// we modify the hash a bit to improve its distribution |
594 |
root |
1.95 |
uint32_t hash = STRHSH_NULL; |
595 |
root |
1.122 |
|
596 |
root |
1.95 |
while (*s) |
597 |
root |
1.98 |
hash = (hash ^ *s++) * 16777619U; |
598 |
root |
1.95 |
|
599 |
root |
1.112 |
return hash ^ (hash >> 16); |
600 |
root |
1.95 |
} |
601 |
|
|
|
602 |
|
|
static inline uint32_t |
603 |
|
|
memhsh (const char *s, size_t len) |
604 |
|
|
{ |
605 |
|
|
uint32_t hash = STRHSH_NULL; |
606 |
root |
1.122 |
|
607 |
root |
1.95 |
while (len--) |
608 |
root |
1.98 |
hash = (hash ^ *s++) * 16777619U; |
609 |
root |
1.95 |
|
610 |
|
|
return hash; |
611 |
|
|
} |
612 |
|
|
|
613 |
root |
1.4 |
struct str_hash |
614 |
|
|
{ |
615 |
|
|
std::size_t operator ()(const char *s) const |
616 |
|
|
{ |
617 |
root |
1.95 |
return strhsh (s); |
618 |
|
|
} |
619 |
root |
1.4 |
|
620 |
root |
1.95 |
std::size_t operator ()(const shstr &s) const |
621 |
|
|
{ |
622 |
|
|
return strhsh (s); |
623 |
root |
1.4 |
} |
624 |
root |
1.128 |
|
625 |
|
|
typedef ska::power_of_two_hash_policy hash_policy; |
626 |
root |
1.4 |
}; |
627 |
|
|
|
628 |
|
|
struct str_equal |
629 |
|
|
{ |
630 |
|
|
bool operator ()(const char *a, const char *b) const |
631 |
|
|
{ |
632 |
|
|
return !strcmp (a, b); |
633 |
|
|
} |
634 |
|
|
}; |
635 |
|
|
|
636 |
root |
1.49 |
// Mostly the same as std::vector, but insert/erase can reorder |
637 |
root |
1.52 |
// the elements, making append(=insert)/remove O(1) instead of O(n). |
638 |
root |
1.49 |
// |
639 |
root |
1.52 |
// NOTE: only some forms of erase are available |
640 |
root |
1.26 |
template<class T> |
641 |
|
|
struct unordered_vector : std::vector<T, slice_allocator<T> > |
642 |
root |
1.6 |
{ |
643 |
root |
1.11 |
typedef typename unordered_vector::iterator iterator; |
644 |
root |
1.6 |
|
645 |
|
|
void erase (unsigned int pos) |
646 |
|
|
{ |
647 |
|
|
if (pos < this->size () - 1) |
648 |
|
|
(*this)[pos] = (*this)[this->size () - 1]; |
649 |
|
|
|
650 |
|
|
this->pop_back (); |
651 |
|
|
} |
652 |
|
|
|
653 |
|
|
void erase (iterator i) |
654 |
|
|
{ |
655 |
|
|
erase ((unsigned int )(i - this->begin ())); |
656 |
|
|
} |
657 |
|
|
}; |
658 |
|
|
|
659 |
root |
1.49 |
// This container blends advantages of linked lists |
660 |
|
|
// (efficiency) with vectors (random access) by |
661 |
root |
1.119 |
// using an unordered vector and storing the vector |
662 |
root |
1.49 |
// index inside the object. |
663 |
|
|
// |
664 |
|
|
// + memory-efficient on most 64 bit archs |
665 |
|
|
// + O(1) insert/remove |
666 |
|
|
// + free unique (but varying) id for inserted objects |
667 |
|
|
// + cache-friendly iteration |
668 |
|
|
// - only works for pointers to structs |
669 |
|
|
// |
670 |
|
|
// NOTE: only some forms of erase/insert are available |
671 |
root |
1.50 |
typedef int object_vector_index; |
672 |
|
|
|
673 |
|
|
template<class T, object_vector_index T::*indexmember> |
674 |
root |
1.26 |
struct object_vector : std::vector<T *, slice_allocator<T *> > |
675 |
|
|
{ |
676 |
root |
1.48 |
typedef typename object_vector::iterator iterator; |
677 |
|
|
|
678 |
|
|
bool contains (const T *obj) const |
679 |
|
|
{ |
680 |
root |
1.50 |
return obj->*indexmember; |
681 |
root |
1.48 |
} |
682 |
|
|
|
683 |
|
|
iterator find (const T *obj) |
684 |
|
|
{ |
685 |
root |
1.50 |
return obj->*indexmember |
686 |
|
|
? this->begin () + obj->*indexmember - 1 |
687 |
root |
1.48 |
: this->end (); |
688 |
|
|
} |
689 |
|
|
|
690 |
root |
1.53 |
void push_back (T *obj) |
691 |
|
|
{ |
692 |
|
|
std::vector<T *, slice_allocator<T *> >::push_back (obj); |
693 |
|
|
obj->*indexmember = this->size (); |
694 |
|
|
} |
695 |
|
|
|
696 |
root |
1.26 |
void insert (T *obj) |
697 |
|
|
{ |
698 |
|
|
push_back (obj); |
699 |
|
|
} |
700 |
|
|
|
701 |
|
|
void insert (T &obj) |
702 |
|
|
{ |
703 |
|
|
insert (&obj); |
704 |
|
|
} |
705 |
|
|
|
706 |
|
|
void erase (T *obj) |
707 |
|
|
{ |
708 |
root |
1.119 |
object_vector_index pos = obj->*indexmember; |
709 |
root |
1.50 |
obj->*indexmember = 0; |
710 |
root |
1.26 |
|
711 |
|
|
if (pos < this->size ()) |
712 |
|
|
{ |
713 |
|
|
(*this)[pos - 1] = (*this)[this->size () - 1]; |
714 |
root |
1.50 |
(*this)[pos - 1]->*indexmember = pos; |
715 |
root |
1.26 |
} |
716 |
|
|
|
717 |
|
|
this->pop_back (); |
718 |
|
|
} |
719 |
|
|
|
720 |
|
|
void erase (T &obj) |
721 |
|
|
{ |
722 |
root |
1.50 |
erase (&obj); |
723 |
root |
1.26 |
} |
724 |
|
|
}; |
725 |
|
|
|
726 |
root |
1.111 |
///////////////////////////////////////////////////////////////////////////// |
727 |
|
|
|
728 |
|
|
// something like a vector or stack, but without |
729 |
|
|
// out of bounds checking |
730 |
|
|
template<typename T> |
731 |
|
|
struct fixed_stack |
732 |
|
|
{ |
733 |
|
|
T *data; |
734 |
|
|
int size; |
735 |
|
|
int max; |
736 |
|
|
|
737 |
|
|
fixed_stack () |
738 |
|
|
: size (0), data (0) |
739 |
|
|
{ |
740 |
|
|
} |
741 |
|
|
|
742 |
|
|
fixed_stack (int max) |
743 |
|
|
: size (0), max (max) |
744 |
|
|
{ |
745 |
|
|
data = salloc<T> (max); |
746 |
|
|
} |
747 |
|
|
|
748 |
|
|
void reset (int new_max) |
749 |
|
|
{ |
750 |
|
|
sfree (data, max); |
751 |
|
|
size = 0; |
752 |
|
|
max = new_max; |
753 |
|
|
data = salloc<T> (max); |
754 |
|
|
} |
755 |
|
|
|
756 |
|
|
void free () |
757 |
|
|
{ |
758 |
|
|
sfree (data, max); |
759 |
|
|
data = 0; |
760 |
|
|
} |
761 |
|
|
|
762 |
|
|
~fixed_stack () |
763 |
|
|
{ |
764 |
|
|
sfree (data, max); |
765 |
|
|
} |
766 |
|
|
|
767 |
|
|
T &operator[](int idx) |
768 |
|
|
{ |
769 |
|
|
return data [idx]; |
770 |
|
|
} |
771 |
|
|
|
772 |
|
|
void push (T v) |
773 |
|
|
{ |
774 |
|
|
data [size++] = v; |
775 |
|
|
} |
776 |
|
|
|
777 |
|
|
T &pop () |
778 |
|
|
{ |
779 |
|
|
return data [--size]; |
780 |
|
|
} |
781 |
|
|
|
782 |
|
|
T remove (int idx) |
783 |
|
|
{ |
784 |
|
|
T v = data [idx]; |
785 |
|
|
|
786 |
|
|
data [idx] = data [--size]; |
787 |
|
|
|
788 |
|
|
return v; |
789 |
|
|
} |
790 |
|
|
}; |
791 |
|
|
|
792 |
|
|
///////////////////////////////////////////////////////////////////////////// |
793 |
|
|
|
794 |
root |
1.10 |
// basically does what strncpy should do, but appends "..." to strings exceeding length |
795 |
root |
1.87 |
// returns the number of bytes actually used (including \0) |
796 |
|
|
int assign (char *dst, const char *src, int maxsize); |
797 |
root |
1.10 |
|
798 |
|
|
// type-safe version of assign |
799 |
root |
1.9 |
template<int N> |
800 |
root |
1.87 |
inline int assign (char (&dst)[N], const char *src) |
801 |
root |
1.9 |
{ |
802 |
root |
1.87 |
return assign ((char *)&dst, src, N); |
803 |
root |
1.9 |
} |
804 |
|
|
|
805 |
root |
1.17 |
typedef double tstamp; |
806 |
|
|
|
807 |
root |
1.59 |
// return current time as timestamp |
808 |
root |
1.17 |
tstamp now (); |
809 |
|
|
|
810 |
root |
1.25 |
int similar_direction (int a, int b); |
811 |
|
|
|
812 |
root |
1.91 |
// like v?sprintf, but returns a "static" buffer |
813 |
|
|
char *vformat (const char *format, va_list ap); |
814 |
root |
1.126 |
char *format (const char *format, ...) ecb_attribute ((format (printf, 1, 2))); |
815 |
root |
1.43 |
|
816 |
sf-marcmagus |
1.89 |
// safety-check player input which will become object->msg |
817 |
|
|
bool msg_is_safe (const char *msg); |
818 |
|
|
|
819 |
root |
1.66 |
///////////////////////////////////////////////////////////////////////////// |
820 |
|
|
// threads, very very thin wrappers around pthreads |
821 |
|
|
|
822 |
|
|
struct thread |
823 |
|
|
{ |
824 |
|
|
pthread_t id; |
825 |
|
|
|
826 |
|
|
void start (void *(*start_routine)(void *), void *arg = 0); |
827 |
|
|
|
828 |
|
|
void cancel () |
829 |
|
|
{ |
830 |
|
|
pthread_cancel (id); |
831 |
|
|
} |
832 |
|
|
|
833 |
|
|
void *join () |
834 |
|
|
{ |
835 |
|
|
void *ret; |
836 |
|
|
|
837 |
|
|
if (pthread_join (id, &ret)) |
838 |
|
|
cleanup ("pthread_join failed", 1); |
839 |
|
|
|
840 |
|
|
return ret; |
841 |
|
|
} |
842 |
|
|
}; |
843 |
|
|
|
844 |
|
|
// note that mutexes are not classes |
845 |
|
|
typedef pthread_mutex_t smutex; |
846 |
|
|
|
847 |
|
|
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
848 |
|
|
#define SMUTEX_INITIALISER PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
849 |
|
|
#else |
850 |
|
|
#define SMUTEX_INITIALISER PTHREAD_MUTEX_INITIALIZER |
851 |
|
|
#endif |
852 |
|
|
|
853 |
|
|
#define SMUTEX(name) smutex name = SMUTEX_INITIALISER |
854 |
root |
1.68 |
#define SMUTEX_LOCK(name) pthread_mutex_lock (&(name)) |
855 |
root |
1.66 |
#define SMUTEX_UNLOCK(name) pthread_mutex_unlock (&(name)) |
856 |
|
|
|
857 |
root |
1.68 |
typedef pthread_cond_t scond; |
858 |
|
|
|
859 |
|
|
#define SCOND(name) scond name = PTHREAD_COND_INITIALIZER |
860 |
|
|
#define SCOND_SIGNAL(name) pthread_cond_signal (&(name)) |
861 |
|
|
#define SCOND_BROADCAST(name) pthread_cond_broadcast (&(name)) |
862 |
|
|
#define SCOND_WAIT(name,mutex) pthread_cond_wait (&(name), &(mutex)) |
863 |
|
|
|
864 |
root |
1.1 |
#endif |
865 |
|
|
|