| … | |
… | |
| 8 | #endif |
8 | #endif |
| 9 | |
9 | |
| 10 | // makes dynamically allocated objects zero-initialised |
10 | // makes dynamically allocated objects zero-initialised |
| 11 | struct zero_initialised |
11 | struct zero_initialised |
| 12 | { |
12 | { |
|
|
13 | void *operator new (size_t s, void *); |
| 13 | void *operator new (size_t s); |
14 | void *operator new (size_t s); |
| 14 | void *operator new [] (size_t s); |
15 | void *operator new [] (size_t s); |
| 15 | void operator delete (void *p, size_t s); |
16 | void operator delete (void *p, size_t s); |
| 16 | void operator delete [] (void *p, size_t s); |
17 | void operator delete [] (void *p, size_t s); |
| 17 | }; |
18 | }; |
| 18 | |
19 | |
|
|
20 | struct str_hash |
|
|
21 | { |
|
|
22 | std::size_t operator ()(const char *s) const |
|
|
23 | { |
|
|
24 | unsigned long hash = 0; |
|
|
25 | |
|
|
26 | /* use the one-at-a-time hash function, which supposedly is |
|
|
27 | * better than the djb2-like one used by perl5.005, but |
|
|
28 | * certainly is better then the bug used here before. |
|
|
29 | * see http://burtleburtle.net/bob/hash/doobs.html |
|
|
30 | */ |
|
|
31 | while (*s) |
|
|
32 | { |
|
|
33 | hash += *s++; |
|
|
34 | hash += hash << 10; |
|
|
35 | hash ^= hash >> 6; |
|
|
36 | } |
|
|
37 | |
|
|
38 | hash += hash << 3; |
|
|
39 | hash ^= hash >> 11; |
|
|
40 | hash += hash << 15; |
|
|
41 | |
|
|
42 | return hash; |
|
|
43 | } |
|
|
44 | }; |
|
|
45 | |
|
|
46 | struct str_equal |
|
|
47 | { |
|
|
48 | bool operator ()(const char *a, const char *b) const |
|
|
49 | { |
|
|
50 | return !strcmp (a, b); |
|
|
51 | } |
|
|
52 | }; |
|
|
53 | |
|
|
54 | #include <vector> |
|
|
55 | |
|
|
56 | template<class obj> |
|
|
57 | struct unordered_vector : std::vector<obj> |
|
|
58 | { |
|
|
59 | typedef typename std::vector<obj>::iterator iterator; |
|
|
60 | |
|
|
61 | void erase (unsigned int pos) |
|
|
62 | { |
|
|
63 | if (pos < this->size () - 1) |
|
|
64 | (*this)[pos] = (*this)[this->size () - 1]; |
|
|
65 | |
|
|
66 | this->pop_back (); |
|
|
67 | } |
|
|
68 | |
|
|
69 | void erase (iterator i) |
|
|
70 | { |
|
|
71 | erase ((unsigned int )(i - this->begin ())); |
|
|
72 | } |
|
|
73 | }; |
|
|
74 | |
| 19 | #endif |
75 | #endif |
| 20 | |
76 | |
