| … | |
… | |
| 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> |
| 11 | #include <new> |
12 | #include <new> |
| 12 | #include <vector> |
13 | #include <vector> |
| 13 | |
14 | |
| 14 | #include <glib.h> |
15 | #include <glib.h> |
| 15 | |
16 | |
| 16 | #include <shstr.h> |
17 | #include <shstr.h> |
| 17 | #include <traits.h> |
18 | #include <traits.h> |
| 18 | |
19 | |
| 19 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
20 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
| 20 | #define AUTODECL(var,expr) typeof(expr) var = (expr) |
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 | // this is much faster than crossfires original algorithm |
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39 | // on modern cpus |
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40 | inline int |
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41 | isqrt (int n) |
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42 | { |
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43 | return (int)sqrtf ((float)n); |
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44 | } |
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45 | |
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46 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
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47 | #if 0 |
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48 | // and has a max. error of 6 in the range -100..+100. |
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49 | #else |
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50 | // and has a max. error of 9 in the range -100..+100. |
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51 | #endif |
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52 | inline int |
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53 | idistance (int dx, int dy) |
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54 | { |
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55 | unsigned int dx_ = abs (dx); |
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56 | unsigned int dy_ = abs (dy); |
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57 | |
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58 | #if 0 |
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59 | return dx_ > dy_ |
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60 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
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61 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
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62 | #else |
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63 | return dx + dy - min (dx, dy) * 5 / 8; |
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64 | #endif |
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65 | } |
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66 | |
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67 | /* |
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68 | * absdir(int): Returns a number between 1 and 8, which represent |
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69 | * the "absolute" direction of a number (it actually takes care of |
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70 | * "overflow" in previous calculations of a direction). |
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71 | */ |
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72 | inline int |
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73 | absdir (int d) |
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74 | { |
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75 | return ((d - 1) & 7) + 1; |
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76 | } |
| 21 | |
77 | |
| 22 | // makes dynamically allocated objects zero-initialised |
78 | // makes dynamically allocated objects zero-initialised |
| 23 | struct zero_initialised |
79 | struct zero_initialised |
| 24 | { |
80 | { |
| 25 | void *operator new (size_t s, void *p) |
81 | void *operator new (size_t s, void *p) |
| … | |
… | |
| 196 | { |
252 | { |
| 197 | return !strcmp (a, b); |
253 | return !strcmp (a, b); |
| 198 | } |
254 | } |
| 199 | }; |
255 | }; |
| 200 | |
256 | |
| 201 | template<class obj> |
257 | template<class T> |
| 202 | struct unordered_vector : std::vector<obj, slice_allocator<obj> > |
258 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
| 203 | { |
259 | { |
| 204 | typedef typename unordered_vector::iterator iterator; |
260 | typedef typename unordered_vector::iterator iterator; |
| 205 | |
261 | |
| 206 | void erase (unsigned int pos) |
262 | void erase (unsigned int pos) |
| 207 | { |
263 | { |
| … | |
… | |
| 212 | } |
268 | } |
| 213 | |
269 | |
| 214 | void erase (iterator i) |
270 | void erase (iterator i) |
| 215 | { |
271 | { |
| 216 | erase ((unsigned int )(i - this->begin ())); |
272 | erase ((unsigned int )(i - this->begin ())); |
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273 | } |
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274 | }; |
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275 | |
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276 | template<class T, int T::* index> |
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277 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
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278 | { |
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279 | void insert (T *obj) |
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280 | { |
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281 | assert (!(obj->*index)); |
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282 | push_back (obj); |
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283 | obj->*index = this->size (); |
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284 | } |
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285 | |
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286 | void insert (T &obj) |
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287 | { |
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288 | insert (&obj); |
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289 | } |
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290 | |
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291 | void erase (T *obj) |
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292 | { |
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293 | assert (obj->*index); |
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294 | int pos = obj->*index; |
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295 | obj->*index = 0; |
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296 | |
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297 | if (pos < this->size ()) |
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298 | { |
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299 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
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300 | (*this)[pos - 1]->*index = pos; |
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301 | } |
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302 | |
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303 | this->pop_back (); |
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304 | } |
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305 | |
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306 | void erase (T &obj) |
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307 | { |
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308 | errase (&obj); |
| 217 | } |
309 | } |
| 218 | }; |
310 | }; |
| 219 | |
311 | |
| 220 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
312 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
| 221 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
313 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
