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6 | #else |
6 | #else |
7 | # define is_constant(c) 0 |
7 | # define is_constant(c) 0 |
8 | #endif |
8 | #endif |
9 | |
9 | |
10 | #include <cstddef> |
10 | #include <cstddef> |
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11 | #include <cmath> |
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12 | #include <new> |
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13 | #include <vector> |
11 | |
14 | |
12 | #include <glib.h> |
15 | #include <glib.h> |
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16 | |
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17 | #include <shstr.h> |
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18 | #include <traits.h> |
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19 | |
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20 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
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21 | #define AUTODECL(var,expr) typeof(expr) var = (expr) |
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22 | |
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23 | // very ugly macro that basicaly declares and initialises a variable |
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24 | // that is in scope for the next statement only |
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25 | // works only for stuff that can be assigned 0 and converts to false |
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26 | // (note: works great for pointers) |
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27 | // most ugly macro I ever wrote |
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28 | #define declvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
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29 | |
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30 | // in range including end |
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31 | #define IN_RANGE_INC(val,beg,end) \ |
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32 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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33 | |
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34 | // in range excluding end |
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35 | #define IN_RANGE_EXC(val,beg,end) \ |
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36 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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37 | |
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38 | void fork_abort (const char *msg); |
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39 | |
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40 | // rationale for using (U) not (T) is to reduce signed/unsigned issues, |
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41 | // as a is often a constant while b is the variable. it is still a bug, though. |
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42 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
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43 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
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44 | 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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45 | |
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46 | 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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47 | |
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48 | // this is much faster than crossfires original algorithm |
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49 | // on modern cpus |
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50 | inline int |
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51 | isqrt (int n) |
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52 | { |
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53 | return (int)sqrtf ((float)n); |
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54 | } |
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55 | |
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56 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
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57 | #if 0 |
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58 | // and has a max. error of 6 in the range -100..+100. |
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59 | #else |
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60 | // and has a max. error of 9 in the range -100..+100. |
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61 | #endif |
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62 | inline int |
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63 | idistance (int dx, int dy) |
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64 | { |
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65 | unsigned int dx_ = abs (dx); |
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66 | unsigned int dy_ = abs (dy); |
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67 | |
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68 | #if 0 |
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69 | return dx_ > dy_ |
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70 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
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71 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
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72 | #else |
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73 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
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74 | #endif |
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75 | } |
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76 | |
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77 | /* |
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78 | * absdir(int): Returns a number between 1 and 8, which represent |
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79 | * the "absolute" direction of a number (it actually takes care of |
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80 | * "overflow" in previous calculations of a direction). |
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81 | */ |
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82 | inline int |
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83 | absdir (int d) |
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84 | { |
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85 | return ((d - 1) & 7) + 1; |
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86 | } |
13 | |
87 | |
14 | // makes dynamically allocated objects zero-initialised |
88 | // makes dynamically allocated objects zero-initialised |
15 | struct zero_initialised |
89 | struct zero_initialised |
16 | { |
90 | { |
17 | void *operator new (size_t s, void *p) |
91 | void *operator new (size_t s, void *p) |
… | |
… | |
39 | { |
113 | { |
40 | g_slice_free1 (s, p); |
114 | g_slice_free1 (s, p); |
41 | } |
115 | } |
42 | }; |
116 | }; |
43 | |
117 | |
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118 | void *salloc_ (int n) throw (std::bad_alloc); |
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119 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
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120 | |
44 | // strictly the same as g_slice_alloc, but never returns 0 |
121 | // strictly the same as g_slice_alloc, but never returns 0 |
45 | void *alloc (int s) throw (std::bad_alloc); |
122 | template<typename T> |
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123 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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124 | |
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125 | // also copies src into the new area, like "memdup" |
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126 | // if src is 0, clears the memory |
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127 | template<typename T> |
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128 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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129 | |
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130 | // clears the memory |
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131 | template<typename T> |
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132 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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133 | |
46 | // for symmetry |
134 | // for symmetry |
47 | inline void dealloc (void *p, int s) throw () |
135 | template<typename T> |
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136 | inline void sfree (T *ptr, int n = 1) throw () |
48 | { |
137 | { |
49 | g_slice_free1 (s, p); |
138 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
50 | } |
139 | } |
51 | |
140 | |
52 | // a STL-compatible allocator that uses g_slice |
141 | // a STL-compatible allocator that uses g_slice |
53 | // boy, this is verbose |
142 | // boy, this is verbose |
54 | template<typename Tp> |
143 | template<typename Tp> |
… | |
… | |
78 | pointer address (reference x) const { return &x; } |
167 | pointer address (reference x) const { return &x; } |
79 | const_pointer address (const_reference x) const { return &x; } |
168 | const_pointer address (const_reference x) const { return &x; } |
80 | |
169 | |
81 | pointer allocate (size_type n, const_pointer = 0) |
170 | pointer allocate (size_type n, const_pointer = 0) |
82 | { |
171 | { |
83 | return static_cast<pointer>(alloc (n * sizeof (Tp))); |
172 | return salloc<Tp> (n); |
84 | } |
173 | } |
85 | |
174 | |
86 | void deallocate (pointer p, size_type n) |
175 | void deallocate (pointer p, size_type n) |
87 | { |
176 | { |
88 | dealloc (static_cast<void *>(p), n * sizeof (Tp)); |
177 | sfree<Tp> (p, n); |
89 | } |
178 | } |
90 | |
179 | |
91 | size_type max_size ()const throw () |
180 | size_type max_size ()const throw () |
92 | { |
181 | { |
93 | return size_t (-1) / sizeof (Tp); |
182 | return size_t (-1) / sizeof (Tp); |
… | |
… | |
102 | { |
191 | { |
103 | p->~Tp (); |
192 | p->~Tp (); |
104 | } |
193 | } |
105 | }; |
194 | }; |
106 | |
195 | |
107 | struct refcounted |
196 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
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197 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
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198 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
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199 | struct tausworthe_random_generator |
108 | { |
200 | { |
109 | mutable int refcnt; |
201 | // generator |
110 | refcounted () : refcnt (0) { } |
202 | uint32_t state [4]; |
111 | void refcnt_inc () { ++refcnt; } |
203 | |
112 | void refcnt_dec () { --refcnt; |
204 | void operator =(const tausworthe_random_generator &src) |
113 | if (refcnt < 0)abort();}//D |
205 | { |
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206 | state [0] = src.state [0]; |
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207 | state [1] = src.state [1]; |
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208 | state [2] = src.state [2]; |
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209 | state [3] = src.state [3]; |
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210 | } |
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211 | |
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212 | void seed (uint32_t seed); |
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213 | uint32_t next (); |
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214 | |
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215 | // uniform distribution |
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216 | uint32_t operator ()(uint32_t r_max) |
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217 | { |
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218 | return is_constant (r_max) |
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219 | ? this->next () % r_max |
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220 | : get_range (r_max); |
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221 | } |
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222 | |
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223 | // return a number within (min .. max) |
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224 | int operator () (int r_min, int r_max) |
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225 | { |
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226 | return is_constant (r_min) && is_constant (r_max) |
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227 | ? r_min + (*this) (max (r_max - r_min + 1, 1)) |
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228 | : get_range (r_min, r_max); |
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229 | } |
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230 | |
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231 | double operator ()() |
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232 | { |
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233 | return this->next () / (double)0xFFFFFFFFU; |
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234 | } |
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235 | |
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236 | protected: |
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237 | uint32_t get_range (uint32_t r_max); |
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238 | int get_range (int r_min, int r_max); |
114 | }; |
239 | }; |
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240 | |
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241 | typedef tausworthe_random_generator rand_gen; |
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242 | |
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243 | extern rand_gen rndm; |
115 | |
244 | |
116 | template<class T> |
245 | template<class T> |
117 | struct refptr |
246 | struct refptr |
118 | { |
247 | { |
119 | T *p; |
248 | T *p; |
… | |
… | |
141 | T &operator * () const { return *p; } |
270 | T &operator * () const { return *p; } |
142 | T *operator ->() const { return p; } |
271 | T *operator ->() const { return p; } |
143 | |
272 | |
144 | operator T *() const { return p; } |
273 | operator T *() const { return p; } |
145 | }; |
274 | }; |
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275 | |
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276 | typedef refptr<maptile> maptile_ptr; |
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277 | typedef refptr<object> object_ptr; |
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278 | typedef refptr<archetype> arch_ptr; |
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279 | typedef refptr<client> client_ptr; |
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280 | typedef refptr<player> player_ptr; |
146 | |
281 | |
147 | struct str_hash |
282 | struct str_hash |
148 | { |
283 | { |
149 | std::size_t operator ()(const char *s) const |
284 | std::size_t operator ()(const char *s) const |
150 | { |
285 | { |
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176 | { |
311 | { |
177 | return !strcmp (a, b); |
312 | return !strcmp (a, b); |
178 | } |
313 | } |
179 | }; |
314 | }; |
180 | |
315 | |
181 | #include <vector> |
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182 | |
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183 | template<class obj> |
316 | template<class T> |
184 | struct unordered_vector : std::vector<obj, slice_allocator<obj> > |
317 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
185 | { |
318 | { |
186 | typedef typename unordered_vector::iterator iterator; |
319 | typedef typename unordered_vector::iterator iterator; |
187 | |
320 | |
188 | void erase (unsigned int pos) |
321 | void erase (unsigned int pos) |
189 | { |
322 | { |
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197 | { |
330 | { |
198 | erase ((unsigned int )(i - this->begin ())); |
331 | erase ((unsigned int )(i - this->begin ())); |
199 | } |
332 | } |
200 | }; |
333 | }; |
201 | |
334 | |
202 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
335 | template<class T, int T::* index> |
203 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
336 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
204 | 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; } |
337 | { |
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338 | void insert (T *obj) |
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339 | { |
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340 | assert (!(obj->*index)); |
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341 | push_back (obj); |
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342 | obj->*index = this->size (); |
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343 | } |
205 | |
344 | |
206 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
345 | void insert (T &obj) |
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346 | { |
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347 | insert (&obj); |
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348 | } |
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349 | |
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350 | void erase (T *obj) |
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351 | { |
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352 | assert (obj->*index); |
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353 | int pos = obj->*index; |
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354 | obj->*index = 0; |
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355 | |
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356 | if (pos < this->size ()) |
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357 | { |
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358 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
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359 | (*this)[pos - 1]->*index = pos; |
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360 | } |
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361 | |
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362 | this->pop_back (); |
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363 | } |
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364 | |
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365 | void erase (T &obj) |
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366 | { |
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367 | errase (&obj); |
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368 | } |
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369 | }; |
207 | |
370 | |
208 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
371 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
209 | void assign (char *dst, const char *src, int maxlen); |
372 | void assign (char *dst, const char *src, int maxlen); |
210 | |
373 | |
211 | // type-safe version of assign |
374 | // type-safe version of assign |
… | |
… | |
213 | inline void assign (char (&dst)[N], const char *src) |
376 | inline void assign (char (&dst)[N], const char *src) |
214 | { |
377 | { |
215 | assign ((char *)&dst, src, N); |
378 | assign ((char *)&dst, src, N); |
216 | } |
379 | } |
217 | |
380 | |
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381 | typedef double tstamp; |
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382 | |
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383 | // return current time as timestampe |
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384 | tstamp now (); |
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385 | |
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386 | int similar_direction (int a, int b); |
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387 | |
218 | #endif |
388 | #endif |
219 | |
389 | |