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Comparing deliantra/server/include/util.h (file contents):
Revision 1.17 by root, Sat Dec 16 03:08:26 2006 UTC vs.
Revision 1.31 by root, Mon Jan 15 02:39:41 2007 UTC

… …
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>
11#include <cmath>
12#include <new>
13#include <vector>
11 14
12#include <glib.h> 15#include <glib.h>
16
17#include <shstr.h>
18#include <traits.h>
13 19
14// 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
15#define AUTODECL(var,expr) typeof(expr) var = (expr) 21#define AUTODECL(var,expr) typeof(expr) var = (expr)
16 22
23// very ugly macro that basicaly declares and initialises a variable
24// that is in scope for the next statement only
25// works only for stuff that can be assigned 0 and converts to false
26// (note: works great for pointers)
27// most ugly macro I ever wrote
28#define declvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1)
29
30// in range including end
31#define IN_RANGE_INC(val,beg,end) \
32 ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
33
34// in range excluding end
35#define IN_RANGE_EXC(val,beg,end) \
36 ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg))
37
38void fork_abort (const char *msg);
39
40// this is much faster than crossfires original algorithm
41// on modern cpus
42inline int
43isqrt (int n)
44{
45 return (int)sqrtf ((float)n);
46}
47
48// this is only twice as fast as naive sqrtf (dx*dy+dy*dy)
49#if 0
50// and has a max. error of 6 in the range -100..+100.
51#else
52// and has a max. error of 9 in the range -100..+100.
53#endif
54inline int
55idistance (int dx, int dy)
56{
57 unsigned int dx_ = abs (dx);
58 unsigned int dy_ = abs (dy);
59
60#if 0
61 return dx_ > dy_
62 ? (dx_ * 61685 + dy_ * 26870) >> 16
63 : (dy_ * 61685 + dx_ * 26870) >> 16;
64#else
65 return dx_ + dy_ - min (dx_, dy_) * 5 / 8;
66#endif
67}
68
69/*
70 * absdir(int): Returns a number between 1 and 8, which represent
71 * the "absolute" direction of a number (it actually takes care of
72 * "overflow" in previous calculations of a direction).
73 */
74inline int
75absdir (int d)
76{
77 return ((d - 1) & 7) + 1;
78}
79
17// makes dynamically allocated objects zero-initialised 80// makes dynamically allocated objects zero-initialised
18struct zero_initialised 81struct zero_initialised
19{ 82{
20 void *operator new (size_t s, void *p) 83 void *operator new (size_t s, void *p)
21 { 84 {
… …
42 { 105 {
43 g_slice_free1 (s, p); 106 g_slice_free1 (s, p);
44 } 107 }
45}; 108};
46 109
110void *salloc_ (int n) throw (std::bad_alloc);
111void *salloc_ (int n, void *src) throw (std::bad_alloc);
112
47// strictly the same as g_slice_alloc, but never returns 0 113// strictly the same as g_slice_alloc, but never returns 0
48void *salloc (int size) throw (std::bad_alloc); 114template<typename T>
115inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); }
116
49// also copies src into the new area, like "memdup" 117// also copies src into the new area, like "memdup"
50void *salloc (int size, void *src) throw (std::bad_alloc); 118// if src is 0, clears the memory
119template<typename T>
120inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); }
121
122// clears the memory
123template<typename T>
124inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); }
125
51// for symmetry 126// for symmetry
127template<typename T>
52inline void sfree (void *ptr, int size) throw () 128inline void sfree (T *ptr, int n = 1) throw ()
53{ 129{
54 g_slice_free1 (size, ptr); 130 g_slice_free1 (n * sizeof (T), (void *)ptr);
55} 131}
56 132
57// a STL-compatible allocator that uses g_slice 133// a STL-compatible allocator that uses g_slice
58// boy, this is verbose 134// boy, this is verbose
59template<typename Tp> 135template<typename Tp>
… …
83 pointer address (reference x) const { return &x; } 159 pointer address (reference x) const { return &x; }
84 const_pointer address (const_reference x) const { return &x; } 160 const_pointer address (const_reference x) const { return &x; }
85 161
86 pointer allocate (size_type n, const_pointer = 0) 162 pointer allocate (size_type n, const_pointer = 0)
87 { 163 {
88 return static_cast<pointer>(salloc (n * sizeof (Tp))); 164 return salloc<Tp> (n);
89 } 165 }
90 166
91 void deallocate (pointer p, size_type n) 167 void deallocate (pointer p, size_type n)
92 { 168 {
93 sfree (static_cast<void *>(p), n * sizeof (Tp)); 169 sfree<Tp> (p, n);
94 } 170 }
95 171
96 size_type max_size ()const throw () 172 size_type max_size ()const throw ()
97 { 173 {
98 return size_t (-1) / sizeof (Tp); 174 return size_t (-1) / sizeof (Tp);
… …
105 181
106 void destroy (pointer p) 182 void destroy (pointer p)
107 { 183 {
108 p->~Tp (); 184 p->~Tp ();
109 } 185 }
110};
111
112struct refcounted
113{
114 refcounted () : refcnt (0) { }
115// virtual ~refcounted ();
116 void refcnt_inc () { ++refcnt; }
117 void refcnt_dec () { --refcnt; }
118 bool dead () { return refcnt == 0; }
119 mutable int refcnt;
120#if 0
121private:
122 static refcounted *rc_first;
123 refcounted *rc_next;
124#endif
125}; 186};
126 187
127template<class T> 188template<class T>
128struct refptr 189struct refptr
129{ 190{
… …
152 T &operator * () const { return *p; } 213 T &operator * () const { return *p; }
153 T *operator ->() const { return p; } 214 T *operator ->() const { return p; }
154 215
155 operator T *() const { return p; } 216 operator T *() const { return p; }
156}; 217};
218
219typedef refptr<maptile> maptile_ptr;
220typedef refptr<object> object_ptr;
221typedef refptr<archetype> arch_ptr;
222typedef refptr<client> client_ptr;
223typedef refptr<player> player_ptr;
157 224
158struct str_hash 225struct str_hash
159{ 226{
160 std::size_t operator ()(const char *s) const 227 std::size_t operator ()(const char *s) const
161 { 228 {
… …
187 { 254 {
188 return !strcmp (a, b); 255 return !strcmp (a, b);
189 } 256 }
190}; 257};
191 258
192#include <vector>
193
194template<class obj> 259template<class T>
195struct unordered_vector : std::vector<obj, slice_allocator<obj> > 260struct unordered_vector : std::vector<T, slice_allocator<T> >
196{ 261{
197 typedef typename unordered_vector::iterator iterator; 262 typedef typename unordered_vector::iterator iterator;
198 263
199 void erase (unsigned int pos) 264 void erase (unsigned int pos)
200 { 265 {
… …
205 } 270 }
206 271
207 void erase (iterator i) 272 void erase (iterator i)
208 { 273 {
209 erase ((unsigned int )(i - this->begin ())); 274 erase ((unsigned int )(i - this->begin ()));
275 }
276};
277
278template<class T, int T::* index>
279struct object_vector : std::vector<T *, slice_allocator<T *> >
280{
281 void insert (T *obj)
282 {
283 assert (!(obj->*index));
284 push_back (obj);
285 obj->*index = this->size ();
286 }
287
288 void insert (T &obj)
289 {
290 insert (&obj);
291 }
292
293 void erase (T *obj)
294 {
295 assert (obj->*index);
296 int pos = obj->*index;
297 obj->*index = 0;
298
299 if (pos < this->size ())
300 {
301 (*this)[pos - 1] = (*this)[this->size () - 1];
302 (*this)[pos - 1]->*index = pos;
303 }
304
305 this->pop_back ();
306 }
307
308 void erase (T &obj)
309 {
310 errase (&obj);
210 } 311 }
211}; 312};
212 313
213template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } 314template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
214template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } 315template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
… …
229typedef double tstamp; 330typedef double tstamp;
230 331
231// return current time as timestampe 332// return current time as timestampe
232tstamp now (); 333tstamp now ();
233 334
335int similar_direction (int a, int b);
336
234#endif 337#endif
235 338

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