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| 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 | |
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10 | #include <cstddef> |
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11 | |
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12 | #include <glib.h> |
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13 | |
| 10 | // makes dynamically allocated objects zero-initialised |
14 | // makes dynamically allocated objects zero-initialised |
| 11 | struct zero_initialised |
15 | struct zero_initialised |
| 12 | { |
16 | { |
| 13 | void *operator new (size_t s, void *); |
17 | void *operator new (size_t s, void *p) |
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18 | { |
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19 | memset (p, 0, s); |
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20 | return p; |
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21 | } |
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22 | |
| 14 | void *operator new (size_t s); |
23 | void *operator new (size_t s) |
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24 | { |
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25 | return g_slice_alloc0 (s); |
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26 | } |
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27 | |
| 15 | void *operator new [] (size_t s); |
28 | void *operator new[] (size_t s) |
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29 | { |
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30 | return g_slice_alloc0 (s); |
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31 | } |
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32 | |
| 16 | void operator delete (void *p, size_t s); |
33 | void operator delete (void *p, size_t s) |
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34 | { |
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35 | g_slice_free1 (s, p); |
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36 | } |
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37 | |
| 17 | void operator delete [] (void *p, size_t s); |
38 | void operator delete[] (void *p, size_t s) |
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39 | { |
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40 | g_slice_free1 (s, p); |
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41 | } |
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42 | }; |
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43 | |
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44 | // strictly the same as g_slice_alloc, but never returns 0 |
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45 | void *alloc (int s) throw (std::bad_alloc); |
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46 | // for symmetry |
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47 | inline void dealloc (void *p, int s) throw () |
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48 | { |
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49 | g_slice_free1 (s, p); |
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50 | } |
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51 | |
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52 | // a STL-compatible allocator that uses g_slice |
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53 | // boy, this is verbose |
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54 | template<typename Tp> |
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55 | struct slice_allocator |
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56 | { |
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57 | typedef size_t size_type; |
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58 | typedef ptrdiff_t difference_type; |
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59 | typedef Tp *pointer; |
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60 | typedef const Tp *const_pointer; |
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61 | typedef Tp &reference; |
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62 | typedef const Tp &const_reference; |
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63 | typedef Tp value_type; |
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64 | |
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65 | template <class U> |
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66 | struct rebind |
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67 | { |
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68 | typedef slice_allocator<U> other; |
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69 | }; |
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70 | |
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71 | slice_allocator () throw () { } |
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72 | slice_allocator (const slice_allocator &o) throw () { } |
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73 | template<typename Tp2> |
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74 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
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75 | |
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76 | ~slice_allocator () { } |
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77 | |
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78 | pointer address (reference x) const { return &x; } |
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79 | const_pointer address (const_reference x) const { return &x; } |
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80 | |
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81 | pointer allocate (size_type n, const_pointer = 0) |
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82 | { |
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83 | return static_cast<pointer>(alloc (n * sizeof (Tp))); |
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84 | } |
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85 | |
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86 | void deallocate (pointer p, size_type n) |
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87 | { |
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88 | dealloc (static_cast<void *>(p), n); |
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89 | } |
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90 | |
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91 | size_type max_size ()const throw () |
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92 | { |
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93 | return size_t (-1) / sizeof (Tp); |
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94 | } |
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95 | |
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96 | void construct (pointer p, const Tp &val) |
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97 | { |
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98 | ::new (p) Tp (val); |
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99 | } |
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100 | |
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101 | void destroy (pointer p) |
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102 | { |
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103 | p->~Tp (); |
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104 | } |
| 18 | }; |
105 | }; |
| 19 | |
106 | |
| 20 | struct refcounted |
107 | struct refcounted |
| 21 | { |
108 | { |
| 22 | mutable int refcnt; |
109 | mutable int refcnt; |
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| 92 | }; |
179 | }; |
| 93 | |
180 | |
| 94 | #include <vector> |
181 | #include <vector> |
| 95 | |
182 | |
| 96 | template<class obj> |
183 | template<class obj> |
| 97 | struct unordered_vector : std::vector<obj> |
184 | struct unordered_vector : std::vector<obj, slice_allocator<obj> > |
| 98 | { |
185 | { |
| 99 | typedef typename std::vector<obj>::iterator iterator; |
186 | typedef typename unordered_vector::iterator iterator; |
| 100 | |
187 | |
| 101 | void erase (unsigned int pos) |
188 | void erase (unsigned int pos) |
| 102 | { |
189 | { |
| 103 | if (pos < this->size () - 1) |
190 | if (pos < this->size () - 1) |
| 104 | (*this)[pos] = (*this)[this->size () - 1]; |
191 | (*this)[pos] = (*this)[this->size () - 1]; |
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| 116 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
203 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
| 117 | template<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; } |
204 | template<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; } |
| 118 | |
205 | |
| 119 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
206 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
| 120 | |
207 | |
| 121 | // basically does what strncpy should do |
208 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
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209 | void assign (char *dst, const char *src, int maxlen); |
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210 | |
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211 | // type-safe version of assign |
| 122 | template<int N> |
212 | template<int N> |
| 123 | inline void assign (char (&dst)[N], const char *src) |
213 | inline void assign (char (&dst)[N], const char *src) |
| 124 | { |
214 | { |
| 125 | // should be optimised at some point, maybe should also add "..." |
215 | assign ((char *)&dst, src, N); |
| 126 | // when buffer is too small. |
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| 127 | snprintf (dst, N, "%s", src); |
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| 128 | } |
216 | } |
| 129 | |
217 | |
| 130 | #endif |
218 | #endif |
| 131 | |
219 | |
