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Comparing deliantra/server/include/util.h (file contents):
Revision 1.5 by pippijn, Thu Sep 7 20:03:20 2006 UTC vs.
Revision 1.16 by root, Fri Nov 17 19:40:54 2006 UTC

… …
5# define is_constant(c) __builtin_constant_p (c) 5# define is_constant(c) __builtin_constant_p (c)
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>
11
12#include <glib.h>
13
14// use a gcc extension for auto declarations until ISO C++ sanctifies them
15#define AUTODECL(var,expr) typeof(expr) var = (expr)
16
10// makes dynamically allocated objects zero-initialised 17// makes dynamically allocated objects zero-initialised
11struct zero_initialised 18struct zero_initialised
12{ 19{
20 void *operator new (size_t s, void *p)
21 {
22 memset (p, 0, s);
23 return p;
24 }
25
13 void *operator new (size_t s); 26 void *operator new (size_t s)
27 {
28 return g_slice_alloc0 (s);
29 }
30
14 void *operator new [] (size_t s); 31 void *operator new[] (size_t s)
32 {
33 return g_slice_alloc0 (s);
34 }
35
15 void operator delete (void *p, size_t s); 36 void operator delete (void *p, size_t s)
37 {
38 g_slice_free1 (s, p);
39 }
40
16 void operator delete [] (void *p, size_t s); 41 void operator delete[] (void *p, size_t s)
42 {
43 g_slice_free1 (s, p);
44 }
45};
46
47// strictly the same as g_slice_alloc, but never returns 0
48void *alloc (int s) throw (std::bad_alloc);
49// for symmetry
50inline void dealloc (void *p, int s) throw ()
51{
52 g_slice_free1 (s, p);
53}
54
55// a STL-compatible allocator that uses g_slice
56// boy, this is verbose
57template<typename Tp>
58struct slice_allocator
59{
60 typedef size_t size_type;
61 typedef ptrdiff_t difference_type;
62 typedef Tp *pointer;
63 typedef const Tp *const_pointer;
64 typedef Tp &reference;
65 typedef const Tp &const_reference;
66 typedef Tp value_type;
67
68 template <class U>
69 struct rebind
70 {
71 typedef slice_allocator<U> other;
72 };
73
74 slice_allocator () throw () { }
75 slice_allocator (const slice_allocator &o) throw () { }
76 template<typename Tp2>
77 slice_allocator (const slice_allocator<Tp2> &) throw () { }
78
79 ~slice_allocator () { }
80
81 pointer address (reference x) const { return &x; }
82 const_pointer address (const_reference x) const { return &x; }
83
84 pointer allocate (size_type n, const_pointer = 0)
85 {
86 return static_cast<pointer>(alloc (n * sizeof (Tp)));
87 }
88
89 void deallocate (pointer p, size_type n)
90 {
91 dealloc (static_cast<void *>(p), n * sizeof (Tp));
92 }
93
94 size_type max_size ()const throw ()
95 {
96 return size_t (-1) / sizeof (Tp);
97 }
98
99 void construct (pointer p, const Tp &val)
100 {
101 ::new (p) Tp (val);
102 }
103
104 void destroy (pointer p)
105 {
106 p->~Tp ();
107 }
108};
109
110struct refcounted
111{
112 refcounted () : refcnt (0) { }
113// virtual ~refcounted ();
114 void refcnt_inc () { ++refcnt; }
115 void refcnt_dec () { --refcnt; }
116 bool dead () { return refcnt == 0; }
117 mutable int refcnt;
118#if 0
119private:
120 static refcounted *rc_first;
121 refcounted *rc_next;
122#endif
123};
124
125template<class T>
126struct refptr
127{
128 T *p;
129
130 refptr () : p(0) { }
131 refptr (const refptr<T> &p) : p(p.p) { if (p) p->refcnt_inc (); }
132 refptr (T *p) : p(p) { if (p) p->refcnt_inc (); }
133 ~refptr () { if (p) p->refcnt_dec (); }
134
135 const refptr<T> &operator =(T *o)
136 {
137 if (p) p->refcnt_dec ();
138 p = o;
139 if (p) p->refcnt_inc ();
140
141 return *this;
142 }
143
144 const refptr<T> &operator =(const refptr<T> o)
145 {
146 *this = o.p;
147 return *this;
148 }
149
150 T &operator * () const { return *p; }
151 T *operator ->() const { return p; }
152
153 operator T *() const { return p; }
17}; 154};
18 155
19struct str_hash 156struct str_hash
20{ 157{
21 std::size_t operator ()(const char *s) const 158 std::size_t operator ()(const char *s) const
… …
48 { 185 {
49 return !strcmp (a, b); 186 return !strcmp (a, b);
50 } 187 }
51}; 188};
52 189
190#include <vector>
191
192template<class obj>
193struct unordered_vector : std::vector<obj, slice_allocator<obj> >
194{
195 typedef typename unordered_vector::iterator iterator;
196
197 void erase (unsigned int pos)
198 {
199 if (pos < this->size () - 1)
200 (*this)[pos] = (*this)[this->size () - 1];
201
202 this->pop_back ();
203 }
204
205 void erase (iterator i)
206 {
207 erase ((unsigned int )(i - this->begin ()));
208 }
209};
210
211template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; }
212template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; }
213template<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; }
214
215template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
216
217// basically does what strncpy should do, but appends "..." to strings exceeding length
218void assign (char *dst, const char *src, int maxlen);
219
220// type-safe version of assign
221template<int N>
222inline void assign (char (&dst)[N], const char *src)
223{
224 assign ((char *)&dst, src, N);
225}
226
53#endif 227#endif
54 228

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