1 |
root |
1.46 |
/* |
2 |
root |
1.58 |
* This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 |
root |
1.46 |
* |
4 |
root |
1.58 |
* Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 |
root |
1.46 |
* |
6 |
root |
1.58 |
* Deliantra is free software: you can redistribute it and/or modify |
7 |
root |
1.51 |
* it under the terms of the GNU General Public License as published by |
8 |
|
|
* the Free Software Foundation, either version 3 of the License, or |
9 |
|
|
* (at your option) any later version. |
10 |
root |
1.46 |
* |
11 |
root |
1.51 |
* This program is distributed in the hope that it will be useful, |
12 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 |
|
|
* GNU General Public License for more details. |
15 |
root |
1.46 |
* |
16 |
root |
1.51 |
* You should have received a copy of the GNU General Public License |
17 |
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>. |
18 |
root |
1.46 |
* |
19 |
root |
1.58 |
* The authors can be reached via e-mail to <support@deliantra.net> |
20 |
root |
1.46 |
*/ |
21 |
|
|
|
22 |
root |
1.1 |
#ifndef UTIL_H__ |
23 |
|
|
#define UTIL_H__ |
24 |
|
|
|
25 |
root |
1.36 |
//#define PREFER_MALLOC |
26 |
root |
1.62 |
#define DEBUG_SALLOC |
27 |
root |
1.36 |
|
28 |
root |
1.2 |
#if __GNUC__ >= 3 |
29 |
root |
1.45 |
# define is_constant(c) __builtin_constant_p (c) |
30 |
|
|
# define expect(expr,value) __builtin_expect ((expr),(value)) |
31 |
|
|
# define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
32 |
root |
1.2 |
#else |
33 |
root |
1.45 |
# define is_constant(c) 0 |
34 |
|
|
# define expect(expr,value) (expr) |
35 |
|
|
# define prefetch(addr,rw,locality) |
36 |
root |
1.2 |
#endif |
37 |
|
|
|
38 |
root |
1.47 |
#if __GNUC__ < 4 || (__GNUC__ == 4 || __GNUC_MINOR__ < 4) |
39 |
|
|
# define decltype(x) typeof(x) |
40 |
|
|
#endif |
41 |
|
|
|
42 |
root |
1.45 |
// put into ifs if you are very sure that the expression |
43 |
|
|
// is mostly true or mosty false. note that these return |
44 |
|
|
// booleans, not the expression. |
45 |
|
|
#define expect_false(expr) expect ((expr) != 0, 0) |
46 |
|
|
#define expect_true(expr) expect ((expr) != 0, 1) |
47 |
|
|
|
48 |
root |
1.11 |
#include <cstddef> |
49 |
root |
1.28 |
#include <cmath> |
50 |
root |
1.25 |
#include <new> |
51 |
|
|
#include <vector> |
52 |
root |
1.11 |
|
53 |
|
|
#include <glib.h> |
54 |
|
|
|
55 |
root |
1.25 |
#include <shstr.h> |
56 |
|
|
#include <traits.h> |
57 |
|
|
|
58 |
root |
1.60 |
#ifdef DEBUG_SALLOC |
59 |
|
|
# define g_slice_alloc0(s) debug_slice_alloc0(s) |
60 |
|
|
# define g_slice_alloc(s) debug_slice_alloc(s) |
61 |
|
|
# define g_slice_free1(s,p) debug_slice_free1(s,p) |
62 |
|
|
void *g_slice_alloc (unsigned long size); |
63 |
|
|
void *g_slice_alloc0 (unsigned long size); |
64 |
|
|
void g_slice_free1 (unsigned long size, void *ptr); |
65 |
|
|
#endif |
66 |
|
|
|
67 |
root |
1.49 |
// use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
68 |
root |
1.47 |
#define auto(var,expr) decltype(expr) var = (expr) |
69 |
root |
1.14 |
|
70 |
root |
1.26 |
// very ugly macro that basicaly declares and initialises a variable |
71 |
|
|
// that is in scope for the next statement only |
72 |
|
|
// works only for stuff that can be assigned 0 and converts to false |
73 |
|
|
// (note: works great for pointers) |
74 |
|
|
// most ugly macro I ever wrote |
75 |
root |
1.48 |
#define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
76 |
root |
1.26 |
|
77 |
root |
1.27 |
// in range including end |
78 |
|
|
#define IN_RANGE_INC(val,beg,end) \ |
79 |
|
|
((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
80 |
|
|
|
81 |
|
|
// in range excluding end |
82 |
|
|
#define IN_RANGE_EXC(val,beg,end) \ |
83 |
|
|
((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
84 |
|
|
|
85 |
root |
1.31 |
void fork_abort (const char *msg); |
86 |
|
|
|
87 |
root |
1.35 |
// rationale for using (U) not (T) is to reduce signed/unsigned issues, |
88 |
|
|
// as a is often a constant while b is the variable. it is still a bug, though. |
89 |
|
|
template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
90 |
|
|
template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
91 |
|
|
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; } |
92 |
root |
1.32 |
|
93 |
|
|
template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
94 |
|
|
|
95 |
root |
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)); } |
96 |
|
|
template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } |
97 |
|
|
|
98 |
root |
1.44 |
template<typename T> |
99 |
|
|
static inline T |
100 |
|
|
lerp (T val, T min_in, T max_in, T min_out, T max_out) |
101 |
|
|
{ |
102 |
|
|
return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
103 |
|
|
} |
104 |
|
|
|
105 |
root |
1.37 |
// lots of stuff taken from FXT |
106 |
|
|
|
107 |
|
|
/* Rotate right. This is used in various places for checksumming */ |
108 |
root |
1.38 |
//TODO: that sucks, use a better checksum algo |
109 |
root |
1.37 |
static inline uint32_t |
110 |
root |
1.38 |
rotate_right (uint32_t c, uint32_t count = 1) |
111 |
root |
1.37 |
{ |
112 |
root |
1.38 |
return (c << (32 - count)) | (c >> count); |
113 |
|
|
} |
114 |
|
|
|
115 |
|
|
static inline uint32_t |
116 |
|
|
rotate_left (uint32_t c, uint32_t count = 1) |
117 |
|
|
{ |
118 |
|
|
return (c >> (32 - count)) | (c << count); |
119 |
root |
1.37 |
} |
120 |
|
|
|
121 |
|
|
// Return abs(a-b) |
122 |
|
|
// Both a and b must not have the most significant bit set |
123 |
|
|
static inline uint32_t |
124 |
|
|
upos_abs_diff (uint32_t a, uint32_t b) |
125 |
|
|
{ |
126 |
|
|
long d1 = b - a; |
127 |
|
|
long d2 = (d1 & (d1 >> 31)) << 1; |
128 |
|
|
|
129 |
|
|
return d1 - d2; // == (b - d) - (a + d); |
130 |
|
|
} |
131 |
|
|
|
132 |
|
|
// Both a and b must not have the most significant bit set |
133 |
|
|
static inline uint32_t |
134 |
|
|
upos_min (uint32_t a, uint32_t b) |
135 |
|
|
{ |
136 |
|
|
int32_t d = b - a; |
137 |
|
|
d &= d >> 31; |
138 |
|
|
return a + d; |
139 |
|
|
} |
140 |
|
|
|
141 |
|
|
// Both a and b must not have the most significant bit set |
142 |
|
|
static inline uint32_t |
143 |
|
|
upos_max (uint32_t a, uint32_t b) |
144 |
|
|
{ |
145 |
|
|
int32_t d = b - a; |
146 |
|
|
d &= d >> 31; |
147 |
|
|
return b - d; |
148 |
|
|
} |
149 |
|
|
|
150 |
root |
1.28 |
// this is much faster than crossfires original algorithm |
151 |
|
|
// on modern cpus |
152 |
|
|
inline int |
153 |
|
|
isqrt (int n) |
154 |
|
|
{ |
155 |
|
|
return (int)sqrtf ((float)n); |
156 |
|
|
} |
157 |
|
|
|
158 |
|
|
// this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
159 |
|
|
#if 0 |
160 |
|
|
// and has a max. error of 6 in the range -100..+100. |
161 |
|
|
#else |
162 |
|
|
// and has a max. error of 9 in the range -100..+100. |
163 |
|
|
#endif |
164 |
|
|
inline int |
165 |
|
|
idistance (int dx, int dy) |
166 |
|
|
{ |
167 |
|
|
unsigned int dx_ = abs (dx); |
168 |
|
|
unsigned int dy_ = abs (dy); |
169 |
|
|
|
170 |
|
|
#if 0 |
171 |
|
|
return dx_ > dy_ |
172 |
|
|
? (dx_ * 61685 + dy_ * 26870) >> 16 |
173 |
|
|
: (dy_ * 61685 + dx_ * 26870) >> 16; |
174 |
|
|
#else |
175 |
root |
1.30 |
return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
176 |
root |
1.28 |
#endif |
177 |
|
|
} |
178 |
|
|
|
179 |
root |
1.29 |
/* |
180 |
|
|
* absdir(int): Returns a number between 1 and 8, which represent |
181 |
|
|
* the "absolute" direction of a number (it actually takes care of |
182 |
|
|
* "overflow" in previous calculations of a direction). |
183 |
|
|
*/ |
184 |
|
|
inline int |
185 |
|
|
absdir (int d) |
186 |
|
|
{ |
187 |
|
|
return ((d - 1) & 7) + 1; |
188 |
|
|
} |
189 |
root |
1.28 |
|
190 |
root |
1.57 |
extern size_t slice_alloc; // statistics |
191 |
|
|
|
192 |
root |
1.1 |
// makes dynamically allocated objects zero-initialised |
193 |
|
|
struct zero_initialised |
194 |
|
|
{ |
195 |
root |
1.11 |
void *operator new (size_t s, void *p) |
196 |
|
|
{ |
197 |
|
|
memset (p, 0, s); |
198 |
|
|
return p; |
199 |
|
|
} |
200 |
|
|
|
201 |
|
|
void *operator new (size_t s) |
202 |
|
|
{ |
203 |
root |
1.57 |
slice_alloc += s; |
204 |
root |
1.11 |
return g_slice_alloc0 (s); |
205 |
|
|
} |
206 |
|
|
|
207 |
|
|
void *operator new[] (size_t s) |
208 |
|
|
{ |
209 |
root |
1.57 |
slice_alloc += s; |
210 |
root |
1.11 |
return g_slice_alloc0 (s); |
211 |
|
|
} |
212 |
|
|
|
213 |
|
|
void operator delete (void *p, size_t s) |
214 |
|
|
{ |
215 |
root |
1.57 |
slice_alloc -= s; |
216 |
root |
1.11 |
g_slice_free1 (s, p); |
217 |
|
|
} |
218 |
|
|
|
219 |
|
|
void operator delete[] (void *p, size_t s) |
220 |
|
|
{ |
221 |
root |
1.57 |
slice_alloc -= s; |
222 |
root |
1.11 |
g_slice_free1 (s, p); |
223 |
|
|
} |
224 |
|
|
}; |
225 |
|
|
|
226 |
root |
1.20 |
void *salloc_ (int n) throw (std::bad_alloc); |
227 |
|
|
void *salloc_ (int n, void *src) throw (std::bad_alloc); |
228 |
|
|
|
229 |
root |
1.12 |
// strictly the same as g_slice_alloc, but never returns 0 |
230 |
root |
1.20 |
template<typename T> |
231 |
|
|
inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
232 |
|
|
|
233 |
root |
1.17 |
// also copies src into the new area, like "memdup" |
234 |
root |
1.18 |
// if src is 0, clears the memory |
235 |
|
|
template<typename T> |
236 |
root |
1.20 |
inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
237 |
root |
1.18 |
|
238 |
root |
1.21 |
// clears the memory |
239 |
|
|
template<typename T> |
240 |
|
|
inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
241 |
|
|
|
242 |
root |
1.12 |
// for symmetry |
243 |
root |
1.18 |
template<typename T> |
244 |
root |
1.20 |
inline void sfree (T *ptr, int n = 1) throw () |
245 |
root |
1.12 |
{ |
246 |
root |
1.36 |
#ifdef PREFER_MALLOC |
247 |
|
|
free (ptr); |
248 |
|
|
#else |
249 |
root |
1.57 |
slice_alloc -= n * sizeof (T); |
250 |
root |
1.20 |
g_slice_free1 (n * sizeof (T), (void *)ptr); |
251 |
root |
1.36 |
#endif |
252 |
root |
1.12 |
} |
253 |
root |
1.11 |
|
254 |
|
|
// a STL-compatible allocator that uses g_slice |
255 |
|
|
// boy, this is verbose |
256 |
|
|
template<typename Tp> |
257 |
|
|
struct slice_allocator |
258 |
|
|
{ |
259 |
|
|
typedef size_t size_type; |
260 |
|
|
typedef ptrdiff_t difference_type; |
261 |
|
|
typedef Tp *pointer; |
262 |
|
|
typedef const Tp *const_pointer; |
263 |
|
|
typedef Tp &reference; |
264 |
|
|
typedef const Tp &const_reference; |
265 |
|
|
typedef Tp value_type; |
266 |
|
|
|
267 |
|
|
template <class U> |
268 |
|
|
struct rebind |
269 |
|
|
{ |
270 |
|
|
typedef slice_allocator<U> other; |
271 |
|
|
}; |
272 |
|
|
|
273 |
|
|
slice_allocator () throw () { } |
274 |
|
|
slice_allocator (const slice_allocator &o) throw () { } |
275 |
|
|
template<typename Tp2> |
276 |
|
|
slice_allocator (const slice_allocator<Tp2> &) throw () { } |
277 |
|
|
|
278 |
|
|
~slice_allocator () { } |
279 |
|
|
|
280 |
|
|
pointer address (reference x) const { return &x; } |
281 |
|
|
const_pointer address (const_reference x) const { return &x; } |
282 |
|
|
|
283 |
|
|
pointer allocate (size_type n, const_pointer = 0) |
284 |
|
|
{ |
285 |
root |
1.18 |
return salloc<Tp> (n); |
286 |
root |
1.11 |
} |
287 |
|
|
|
288 |
|
|
void deallocate (pointer p, size_type n) |
289 |
|
|
{ |
290 |
root |
1.19 |
sfree<Tp> (p, n); |
291 |
root |
1.11 |
} |
292 |
|
|
|
293 |
|
|
size_type max_size ()const throw () |
294 |
|
|
{ |
295 |
|
|
return size_t (-1) / sizeof (Tp); |
296 |
|
|
} |
297 |
|
|
|
298 |
|
|
void construct (pointer p, const Tp &val) |
299 |
|
|
{ |
300 |
|
|
::new (p) Tp (val); |
301 |
|
|
} |
302 |
|
|
|
303 |
|
|
void destroy (pointer p) |
304 |
|
|
{ |
305 |
|
|
p->~Tp (); |
306 |
|
|
} |
307 |
root |
1.1 |
}; |
308 |
|
|
|
309 |
root |
1.32 |
// P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
310 |
|
|
// http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
311 |
|
|
// http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
312 |
|
|
struct tausworthe_random_generator |
313 |
|
|
{ |
314 |
root |
1.34 |
// generator |
315 |
root |
1.32 |
uint32_t state [4]; |
316 |
|
|
|
317 |
root |
1.34 |
void operator =(const tausworthe_random_generator &src) |
318 |
|
|
{ |
319 |
|
|
state [0] = src.state [0]; |
320 |
|
|
state [1] = src.state [1]; |
321 |
|
|
state [2] = src.state [2]; |
322 |
|
|
state [3] = src.state [3]; |
323 |
|
|
} |
324 |
|
|
|
325 |
|
|
void seed (uint32_t seed); |
326 |
root |
1.32 |
uint32_t next (); |
327 |
|
|
|
328 |
root |
1.34 |
// uniform distribution |
329 |
root |
1.42 |
uint32_t operator ()(uint32_t num) |
330 |
root |
1.32 |
{ |
331 |
root |
1.42 |
return is_constant (num) |
332 |
|
|
? (next () * (uint64_t)num) >> 32U |
333 |
|
|
: get_range (num); |
334 |
root |
1.32 |
} |
335 |
|
|
|
336 |
|
|
// return a number within (min .. max) |
337 |
|
|
int operator () (int r_min, int r_max) |
338 |
|
|
{ |
339 |
root |
1.42 |
return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
340 |
|
|
? r_min + operator ()(r_max - r_min + 1) |
341 |
root |
1.34 |
: get_range (r_min, r_max); |
342 |
root |
1.32 |
} |
343 |
|
|
|
344 |
|
|
double operator ()() |
345 |
|
|
{ |
346 |
root |
1.34 |
return this->next () / (double)0xFFFFFFFFU; |
347 |
root |
1.32 |
} |
348 |
root |
1.34 |
|
349 |
|
|
protected: |
350 |
|
|
uint32_t get_range (uint32_t r_max); |
351 |
|
|
int get_range (int r_min, int r_max); |
352 |
root |
1.32 |
}; |
353 |
|
|
|
354 |
|
|
typedef tausworthe_random_generator rand_gen; |
355 |
|
|
|
356 |
|
|
extern rand_gen rndm; |
357 |
|
|
|
358 |
root |
1.54 |
INTERFACE_CLASS (attachable) |
359 |
|
|
struct refcnt_base |
360 |
|
|
{ |
361 |
|
|
typedef int refcnt_t; |
362 |
|
|
mutable refcnt_t ACC (RW, refcnt); |
363 |
|
|
|
364 |
|
|
MTH void refcnt_inc () const { ++refcnt; } |
365 |
|
|
MTH void refcnt_dec () const { --refcnt; } |
366 |
|
|
|
367 |
|
|
refcnt_base () : refcnt (0) { } |
368 |
|
|
}; |
369 |
|
|
|
370 |
root |
1.56 |
// to avoid branches with more advanced compilers |
371 |
root |
1.54 |
extern refcnt_base::refcnt_t refcnt_dummy; |
372 |
|
|
|
373 |
root |
1.7 |
template<class T> |
374 |
|
|
struct refptr |
375 |
|
|
{ |
376 |
root |
1.54 |
// p if not null |
377 |
|
|
refcnt_base::refcnt_t *refcnt_ref () { return p ? &p->refcnt : &refcnt_dummy; } |
378 |
|
|
|
379 |
|
|
void refcnt_dec () |
380 |
|
|
{ |
381 |
|
|
if (!is_constant (p)) |
382 |
|
|
--*refcnt_ref (); |
383 |
|
|
else if (p) |
384 |
|
|
--p->refcnt; |
385 |
|
|
} |
386 |
|
|
|
387 |
|
|
void refcnt_inc () |
388 |
|
|
{ |
389 |
|
|
if (!is_constant (p)) |
390 |
|
|
++*refcnt_ref (); |
391 |
|
|
else if (p) |
392 |
|
|
++p->refcnt; |
393 |
|
|
} |
394 |
|
|
|
395 |
root |
1.7 |
T *p; |
396 |
|
|
|
397 |
|
|
refptr () : p(0) { } |
398 |
root |
1.54 |
refptr (const refptr<T> &p) : p(p.p) { refcnt_inc (); } |
399 |
|
|
refptr (T *p) : p(p) { refcnt_inc (); } |
400 |
|
|
~refptr () { refcnt_dec (); } |
401 |
root |
1.7 |
|
402 |
|
|
const refptr<T> &operator =(T *o) |
403 |
|
|
{ |
404 |
root |
1.54 |
// if decrementing ever destroys we need to reverse the order here |
405 |
|
|
refcnt_dec (); |
406 |
root |
1.7 |
p = o; |
407 |
root |
1.54 |
refcnt_inc (); |
408 |
root |
1.7 |
return *this; |
409 |
|
|
} |
410 |
|
|
|
411 |
root |
1.54 |
const refptr<T> &operator =(const refptr<T> &o) |
412 |
root |
1.7 |
{ |
413 |
|
|
*this = o.p; |
414 |
|
|
return *this; |
415 |
|
|
} |
416 |
|
|
|
417 |
|
|
T &operator * () const { return *p; } |
418 |
root |
1.54 |
T *operator ->() const { return p; } |
419 |
root |
1.7 |
|
420 |
|
|
operator T *() const { return p; } |
421 |
|
|
}; |
422 |
|
|
|
423 |
root |
1.24 |
typedef refptr<maptile> maptile_ptr; |
424 |
root |
1.22 |
typedef refptr<object> object_ptr; |
425 |
|
|
typedef refptr<archetype> arch_ptr; |
426 |
root |
1.24 |
typedef refptr<client> client_ptr; |
427 |
|
|
typedef refptr<player> player_ptr; |
428 |
root |
1.22 |
|
429 |
root |
1.4 |
struct str_hash |
430 |
|
|
{ |
431 |
|
|
std::size_t operator ()(const char *s) const |
432 |
|
|
{ |
433 |
|
|
unsigned long hash = 0; |
434 |
|
|
|
435 |
|
|
/* use the one-at-a-time hash function, which supposedly is |
436 |
|
|
* better than the djb2-like one used by perl5.005, but |
437 |
|
|
* certainly is better then the bug used here before. |
438 |
|
|
* see http://burtleburtle.net/bob/hash/doobs.html |
439 |
|
|
*/ |
440 |
|
|
while (*s) |
441 |
|
|
{ |
442 |
|
|
hash += *s++; |
443 |
|
|
hash += hash << 10; |
444 |
|
|
hash ^= hash >> 6; |
445 |
|
|
} |
446 |
|
|
|
447 |
|
|
hash += hash << 3; |
448 |
|
|
hash ^= hash >> 11; |
449 |
|
|
hash += hash << 15; |
450 |
|
|
|
451 |
|
|
return hash; |
452 |
|
|
} |
453 |
|
|
}; |
454 |
|
|
|
455 |
|
|
struct str_equal |
456 |
|
|
{ |
457 |
|
|
bool operator ()(const char *a, const char *b) const |
458 |
|
|
{ |
459 |
|
|
return !strcmp (a, b); |
460 |
|
|
} |
461 |
|
|
}; |
462 |
|
|
|
463 |
root |
1.49 |
// Mostly the same as std::vector, but insert/erase can reorder |
464 |
root |
1.52 |
// the elements, making append(=insert)/remove O(1) instead of O(n). |
465 |
root |
1.49 |
// |
466 |
root |
1.52 |
// NOTE: only some forms of erase are available |
467 |
root |
1.26 |
template<class T> |
468 |
|
|
struct unordered_vector : std::vector<T, slice_allocator<T> > |
469 |
root |
1.6 |
{ |
470 |
root |
1.11 |
typedef typename unordered_vector::iterator iterator; |
471 |
root |
1.6 |
|
472 |
|
|
void erase (unsigned int pos) |
473 |
|
|
{ |
474 |
|
|
if (pos < this->size () - 1) |
475 |
|
|
(*this)[pos] = (*this)[this->size () - 1]; |
476 |
|
|
|
477 |
|
|
this->pop_back (); |
478 |
|
|
} |
479 |
|
|
|
480 |
|
|
void erase (iterator i) |
481 |
|
|
{ |
482 |
|
|
erase ((unsigned int )(i - this->begin ())); |
483 |
|
|
} |
484 |
|
|
}; |
485 |
|
|
|
486 |
root |
1.49 |
// This container blends advantages of linked lists |
487 |
|
|
// (efficiency) with vectors (random access) by |
488 |
|
|
// by using an unordered vector and storing the vector |
489 |
|
|
// index inside the object. |
490 |
|
|
// |
491 |
|
|
// + memory-efficient on most 64 bit archs |
492 |
|
|
// + O(1) insert/remove |
493 |
|
|
// + free unique (but varying) id for inserted objects |
494 |
|
|
// + cache-friendly iteration |
495 |
|
|
// - only works for pointers to structs |
496 |
|
|
// |
497 |
|
|
// NOTE: only some forms of erase/insert are available |
498 |
root |
1.50 |
typedef int object_vector_index; |
499 |
|
|
|
500 |
|
|
template<class T, object_vector_index T::*indexmember> |
501 |
root |
1.26 |
struct object_vector : std::vector<T *, slice_allocator<T *> > |
502 |
|
|
{ |
503 |
root |
1.48 |
typedef typename object_vector::iterator iterator; |
504 |
|
|
|
505 |
|
|
bool contains (const T *obj) const |
506 |
|
|
{ |
507 |
root |
1.50 |
return obj->*indexmember; |
508 |
root |
1.48 |
} |
509 |
|
|
|
510 |
|
|
iterator find (const T *obj) |
511 |
|
|
{ |
512 |
root |
1.50 |
return obj->*indexmember |
513 |
|
|
? this->begin () + obj->*indexmember - 1 |
514 |
root |
1.48 |
: this->end (); |
515 |
|
|
} |
516 |
|
|
|
517 |
root |
1.53 |
void push_back (T *obj) |
518 |
|
|
{ |
519 |
|
|
std::vector<T *, slice_allocator<T *> >::push_back (obj); |
520 |
|
|
obj->*indexmember = this->size (); |
521 |
|
|
} |
522 |
|
|
|
523 |
root |
1.26 |
void insert (T *obj) |
524 |
|
|
{ |
525 |
|
|
push_back (obj); |
526 |
|
|
} |
527 |
|
|
|
528 |
|
|
void insert (T &obj) |
529 |
|
|
{ |
530 |
|
|
insert (&obj); |
531 |
|
|
} |
532 |
|
|
|
533 |
|
|
void erase (T *obj) |
534 |
|
|
{ |
535 |
root |
1.50 |
unsigned int pos = obj->*indexmember; |
536 |
|
|
obj->*indexmember = 0; |
537 |
root |
1.26 |
|
538 |
|
|
if (pos < this->size ()) |
539 |
|
|
{ |
540 |
|
|
(*this)[pos - 1] = (*this)[this->size () - 1]; |
541 |
root |
1.50 |
(*this)[pos - 1]->*indexmember = pos; |
542 |
root |
1.26 |
} |
543 |
|
|
|
544 |
|
|
this->pop_back (); |
545 |
|
|
} |
546 |
|
|
|
547 |
|
|
void erase (T &obj) |
548 |
|
|
{ |
549 |
root |
1.50 |
erase (&obj); |
550 |
root |
1.26 |
} |
551 |
|
|
}; |
552 |
|
|
|
553 |
root |
1.10 |
// basically does what strncpy should do, but appends "..." to strings exceeding length |
554 |
|
|
void assign (char *dst, const char *src, int maxlen); |
555 |
|
|
|
556 |
|
|
// type-safe version of assign |
557 |
root |
1.9 |
template<int N> |
558 |
|
|
inline void assign (char (&dst)[N], const char *src) |
559 |
|
|
{ |
560 |
root |
1.10 |
assign ((char *)&dst, src, N); |
561 |
root |
1.9 |
} |
562 |
|
|
|
563 |
root |
1.17 |
typedef double tstamp; |
564 |
|
|
|
565 |
root |
1.59 |
// return current time as timestamp |
566 |
root |
1.17 |
tstamp now (); |
567 |
|
|
|
568 |
root |
1.25 |
int similar_direction (int a, int b); |
569 |
|
|
|
570 |
root |
1.55 |
// like sprintf, but returns a "static" buffer |
571 |
|
|
const char *format (const char *format, ...); |
572 |
root |
1.43 |
|
573 |
root |
1.1 |
#endif |
574 |
|
|
|