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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 | #include <cmath> |
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12 | #include <new> |
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13 | #include <vector> |
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14 | |
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15 | #include <glib.h> |
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16 | |
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17 | #include <shstr.h> |
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18 | #include <traits.h> |
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19 | |
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20 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
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21 | #define AUTODECL(var,expr) typeof(expr) var = (expr) |
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22 | |
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23 | // very ugly macro that basicaly declares and initialises a variable |
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24 | // that is in scope for the next statement only |
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25 | // works only for stuff that can be assigned 0 and converts to false |
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26 | // (note: works great for pointers) |
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27 | // most ugly macro I ever wrote |
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28 | #define declvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
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29 | |
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30 | // in range including end |
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31 | #define IN_RANGE_INC(val,beg,end) \ |
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32 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
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33 | |
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34 | // in range excluding end |
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35 | #define IN_RANGE_EXC(val,beg,end) \ |
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36 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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37 | |
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38 | // this is much faster than crossfires original algorithm |
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39 | // on modern cpus |
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40 | inline int |
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41 | isqrt (int n) |
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42 | { |
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43 | return (int)sqrtf ((float)n); |
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44 | } |
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45 | |
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46 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
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47 | #if 0 |
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48 | // and has a max. error of 6 in the range -100..+100. |
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49 | #else |
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50 | // and has a max. error of 9 in the range -100..+100. |
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51 | #endif |
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52 | inline int |
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53 | idistance (int dx, int dy) |
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54 | { |
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55 | unsigned int dx_ = abs (dx); |
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56 | unsigned int dy_ = abs (dy); |
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57 | |
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58 | #if 0 |
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59 | return dx_ > dy_ |
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60 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
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61 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
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62 | #else |
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63 | return dx + dy - min (dx, dy) * 5 / 8; |
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64 | #endif |
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65 | } |
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66 | |
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67 | /* |
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68 | * absdir(int): Returns a number between 1 and 8, which represent |
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69 | * the "absolute" direction of a number (it actually takes care of |
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70 | * "overflow" in previous calculations of a direction). |
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71 | */ |
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72 | inline int |
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73 | absdir (int d) |
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74 | { |
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75 | return ((d - 1) & 7) + 1; |
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76 | } |
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77 | |
10 | // makes dynamically allocated objects zero-initialised |
78 | // makes dynamically allocated objects zero-initialised |
11 | struct zero_initialised |
79 | struct zero_initialised |
12 | { |
80 | { |
13 | void *operator new (size_t s, void *); |
81 | void *operator new (size_t s, void *p) |
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82 | { |
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83 | memset (p, 0, s); |
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84 | return p; |
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85 | } |
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86 | |
14 | void *operator new (size_t s); |
87 | void *operator new (size_t s) |
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88 | { |
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89 | return g_slice_alloc0 (s); |
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90 | } |
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91 | |
15 | void *operator new [] (size_t s); |
92 | void *operator new[] (size_t s) |
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93 | { |
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94 | return g_slice_alloc0 (s); |
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95 | } |
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96 | |
16 | void operator delete (void *p, size_t s); |
97 | void operator delete (void *p, size_t s) |
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98 | { |
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99 | g_slice_free1 (s, p); |
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100 | } |
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101 | |
17 | void operator delete [] (void *p, size_t s); |
102 | void operator delete[] (void *p, size_t s) |
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103 | { |
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104 | g_slice_free1 (s, p); |
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105 | } |
18 | }; |
106 | }; |
19 | |
107 | |
20 | struct refcounted |
108 | void *salloc_ (int n) throw (std::bad_alloc); |
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109 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
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110 | |
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111 | // strictly the same as g_slice_alloc, but never returns 0 |
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112 | template<typename T> |
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113 | inline T *salloc (int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T)); } |
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114 | |
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115 | // also copies src into the new area, like "memdup" |
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116 | // if src is 0, clears the memory |
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117 | template<typename T> |
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118 | inline T *salloc (int n, T *src) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), (void *)src); } |
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119 | |
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120 | // clears the memory |
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121 | template<typename T> |
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122 | inline T *salloc0(int n = 1) throw (std::bad_alloc) { return (T *)salloc_ (n * sizeof (T), 0); } |
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123 | |
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124 | // for symmetry |
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125 | template<typename T> |
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126 | inline void sfree (T *ptr, int n = 1) throw () |
21 | { |
127 | { |
22 | mutable int refcnt; |
128 | g_slice_free1 (n * sizeof (T), (void *)ptr); |
23 | refcounted () : refcnt (0) { } |
129 | } |
24 | void refcnt_inc () { ++refcnt; } |
130 | |
25 | void refcnt_dec () { --refcnt; |
131 | // a STL-compatible allocator that uses g_slice |
26 | if (refcnt < 0)abort();}//D |
132 | // boy, this is verbose |
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133 | template<typename Tp> |
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134 | struct slice_allocator |
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135 | { |
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136 | typedef size_t size_type; |
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137 | typedef ptrdiff_t difference_type; |
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138 | typedef Tp *pointer; |
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139 | typedef const Tp *const_pointer; |
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140 | typedef Tp &reference; |
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141 | typedef const Tp &const_reference; |
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142 | typedef Tp value_type; |
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143 | |
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144 | template <class U> |
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145 | struct rebind |
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146 | { |
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147 | typedef slice_allocator<U> other; |
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148 | }; |
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149 | |
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150 | slice_allocator () throw () { } |
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151 | slice_allocator (const slice_allocator &o) throw () { } |
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152 | template<typename Tp2> |
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153 | slice_allocator (const slice_allocator<Tp2> &) throw () { } |
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154 | |
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155 | ~slice_allocator () { } |
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156 | |
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157 | pointer address (reference x) const { return &x; } |
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158 | const_pointer address (const_reference x) const { return &x; } |
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159 | |
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160 | pointer allocate (size_type n, const_pointer = 0) |
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161 | { |
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162 | return salloc<Tp> (n); |
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163 | } |
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164 | |
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165 | void deallocate (pointer p, size_type n) |
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166 | { |
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167 | sfree<Tp> (p, n); |
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168 | } |
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169 | |
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170 | size_type max_size ()const throw () |
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171 | { |
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172 | return size_t (-1) / sizeof (Tp); |
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173 | } |
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174 | |
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175 | void construct (pointer p, const Tp &val) |
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176 | { |
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177 | ::new (p) Tp (val); |
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178 | } |
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179 | |
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180 | void destroy (pointer p) |
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181 | { |
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182 | p->~Tp (); |
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183 | } |
27 | }; |
184 | }; |
28 | |
185 | |
29 | template<class T> |
186 | template<class T> |
30 | struct refptr |
187 | struct refptr |
31 | { |
188 | { |
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54 | T &operator * () const { return *p; } |
211 | T &operator * () const { return *p; } |
55 | T *operator ->() const { return p; } |
212 | T *operator ->() const { return p; } |
56 | |
213 | |
57 | operator T *() const { return p; } |
214 | operator T *() const { return p; } |
58 | }; |
215 | }; |
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216 | |
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217 | typedef refptr<maptile> maptile_ptr; |
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218 | typedef refptr<object> object_ptr; |
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219 | typedef refptr<archetype> arch_ptr; |
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220 | typedef refptr<client> client_ptr; |
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221 | typedef refptr<player> player_ptr; |
59 | |
222 | |
60 | struct str_hash |
223 | struct str_hash |
61 | { |
224 | { |
62 | std::size_t operator ()(const char *s) const |
225 | std::size_t operator ()(const char *s) const |
63 | { |
226 | { |
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89 | { |
252 | { |
90 | return !strcmp (a, b); |
253 | return !strcmp (a, b); |
91 | } |
254 | } |
92 | }; |
255 | }; |
93 | |
256 | |
94 | #include <vector> |
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95 | |
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96 | template<class obj> |
257 | template<class T> |
97 | struct unordered_vector : std::vector<obj> |
258 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
98 | { |
259 | { |
99 | typedef typename std::vector<obj>::iterator iterator; |
260 | typedef typename unordered_vector::iterator iterator; |
100 | |
261 | |
101 | void erase (unsigned int pos) |
262 | void erase (unsigned int pos) |
102 | { |
263 | { |
103 | if (pos < this->size () - 1) |
264 | if (pos < this->size () - 1) |
104 | (*this)[pos] = (*this)[this->size () - 1]; |
265 | (*this)[pos] = (*this)[this->size () - 1]; |
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107 | } |
268 | } |
108 | |
269 | |
109 | void erase (iterator i) |
270 | void erase (iterator i) |
110 | { |
271 | { |
111 | erase ((unsigned int )(i - this->begin ())); |
272 | erase ((unsigned int )(i - this->begin ())); |
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273 | } |
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274 | }; |
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275 | |
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276 | template<class T, int T::* index> |
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277 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
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278 | { |
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279 | void insert (T *obj) |
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280 | { |
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281 | assert (!(obj->*index)); |
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282 | push_back (obj); |
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283 | obj->*index = this->size (); |
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284 | } |
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285 | |
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286 | void insert (T &obj) |
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287 | { |
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288 | insert (&obj); |
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289 | } |
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290 | |
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291 | void erase (T *obj) |
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292 | { |
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293 | assert (obj->*index); |
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294 | int pos = obj->*index; |
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295 | obj->*index = 0; |
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296 | |
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297 | if (pos < this->size ()) |
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298 | { |
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299 | (*this)[pos - 1] = (*this)[this->size () - 1]; |
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300 | (*this)[pos - 1]->*index = pos; |
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301 | } |
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302 | |
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303 | this->pop_back (); |
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304 | } |
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305 | |
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306 | void erase (T &obj) |
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307 | { |
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308 | errase (&obj); |
112 | } |
309 | } |
113 | }; |
310 | }; |
114 | |
311 | |
115 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
312 | template<typename T, typename U> static inline T min (T a, U b) { return a < (T)b ? a : (T)b; } |
116 | template<typename T, typename U> static inline T max (T a, U b) { return a > (T)b ? a : (T)b; } |
313 | 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; } |
314 | 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 | |
315 | |
119 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
316 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
120 | |
317 | |
121 | // basically does what strncpy should do |
318 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
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319 | void assign (char *dst, const char *src, int maxlen); |
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320 | |
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321 | // type-safe version of assign |
122 | template<int N> |
322 | template<int N> |
123 | inline void assign (char (&dst)[N], const char *src) |
323 | inline void assign (char (&dst)[N], const char *src) |
124 | { |
324 | { |
125 | // should be optimised at some point, maybe should also add "..." |
325 | 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 | } |
326 | } |
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327 | |
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328 | typedef double tstamp; |
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329 | |
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330 | // return current time as timestampe |
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331 | tstamp now (); |
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332 | |
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333 | int similar_direction (int a, int b); |
129 | |
334 | |
130 | #endif |
335 | #endif |
131 | |
336 | |