| … | |
… | |
| 63 | |
63 | |
| 64 | // we shamelessly optimise for "simple" types. everything |
64 | // we shamelessly optimise for "simple" types. everything |
| 65 | // "not simple enough" will use the slow path. |
65 | // "not simple enough" will use the slow path. |
| 66 | static bool is_simple_enough () |
66 | static bool is_simple_enough () |
| 67 | { |
67 | { |
| 68 | return 1; // we are not there yet |
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| 69 | #if __cplusplus >= 201103L |
68 | #if __cplusplus >= 201103L |
| 70 | return std::is_trivially_assignable<T, T>::value |
69 | return std::is_trivially_assignable<T, T>::value |
| 71 | && std::is_trivially_constructable<T>::value |
70 | && std::is_trivially_constructable<T>::value |
| 72 | && std::is_trivially_copyable<T>::value |
71 | && std::is_trivially_copyable<T>::value |
| 73 | && std::is_trivially_destructible<T>::value; |
72 | && std::is_trivially_destructible<T>::value; |
| … | |
… | |
| 83 | |
82 | |
| 84 | static void construct (iterator a, size_type n = 1) |
83 | static void construct (iterator a, size_type n = 1) |
| 85 | { |
84 | { |
| 86 | if (!is_simple_enough ()) |
85 | if (!is_simple_enough ()) |
| 87 | while (n--) |
86 | while (n--) |
| 88 | new (*a++) T (); |
87 | new (a++) T (); |
| 89 | } |
88 | } |
| 90 | |
89 | |
| 91 | static void destruct (iterator a, size_type n = 1) |
90 | static void destruct (iterator a, size_type n = 1) |
| 92 | { |
91 | { |
| 93 | if (!is_simple_enough ()) |
92 | if (!is_simple_enough ()) |
| … | |
… | |
| 98 | template<class I> |
97 | template<class I> |
| 99 | static void cop_new (iterator a, I b) { new (a) T (*b); } |
98 | static void cop_new (iterator a, I b) { new (a) T (*b); } |
| 100 | template<class I> |
99 | template<class I> |
| 101 | static void cop_set (iterator a, I b) { *a = *b ; } |
100 | static void cop_set (iterator a, I b) { *a = *b ; } |
| 102 | |
101 | |
| 103 | static void copy_higher (iterator dst, iterator src, size_type n, void (*op)(iterator, iterator) = cop_new) |
102 | // MUST copy forwards |
| 104 | { |
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| 105 | if (is_simple_enough ()) |
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| 106 | memmove (dst, src, sizeof (T) * n); |
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| 107 | else |
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| 108 | while (n--) |
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| 109 | op (dst + n, src + n); |
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| 110 | } |
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| 111 | |
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| 112 | template<class I> |
103 | template<class I> |
| 113 | static void copy (iterator dst, I src, size_type n, void (*op)(iterator, I) = cop_new) |
104 | static void copy (iterator dst, I src, size_type n, void (*op)(iterator, I)) |
| 114 | { |
105 | { |
| 115 | while (n--) |
106 | while (n--) |
| 116 | op (dst++, src++); |
107 | op (dst++, src++); |
| 117 | } |
108 | } |
| 118 | |
109 | |
| 119 | static void copy (iterator dst, iterator src, size_type n, void (*op)(iterator, iterator) = cop_new) |
110 | static void copy (iterator dst, iterator src, size_type n, void (*op)(iterator, iterator)) |
| 120 | { |
111 | { |
| 121 | if (is_simple_enough ()) |
112 | if (is_simple_enough ()) |
| 122 | memcpy (dst, src, sizeof (T) * n); |
113 | memcpy (dst, src, sizeof (T) * n); |
| 123 | else |
114 | else |
| 124 | copy<iterator> (dst, src, n, op); |
115 | copy<iterator> (dst, src, n, op); |
| … | |
… | |
| 153 | dealloc (); |
144 | dealloc (); |
| 154 | buf = nbuf; |
145 | buf = nbuf; |
| 155 | } |
146 | } |
| 156 | |
147 | |
| 157 | construct (buf + sze, n); |
148 | construct (buf + sze, n); |
| 158 | copy_higher (buf + pos + n, buf + pos, sze - pos, cop_set); |
149 | |
| 159 | sze += n; |
150 | sze += n; |
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151 | |
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152 | iterator src = buf + pos; |
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153 | if (is_simple_enough ()) |
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154 | memmove (src + n, src, sizeof (T) * n); |
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155 | else |
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156 | for (size_type i = n; i--; ) |
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157 | cop_set (src + n + i, src + i); |
| 160 | } |
158 | } |
| 161 | |
159 | |
| 162 | public: |
160 | public: |
| 163 | size_type capacity () const { return res; } |
161 | size_type capacity () const { return res; } |
| 164 | size_type size () const { return sze; } |
162 | size_type size () const { return sze; } |
| … | |
… | |
| 184 | return; |
182 | return; |
| 185 | |
183 | |
| 186 | sz = good_size (sz); |
184 | sz = good_size (sz); |
| 187 | T *nbuf = alloc (sz); |
185 | T *nbuf = alloc (sz); |
| 188 | |
186 | |
| 189 | copy (nbuf, begin (), sze); |
187 | copy (nbuf, begin (), sze, cop_new); |
| 190 | dealloc (); |
188 | dealloc (); |
| 191 | |
189 | |
| 192 | buf = nbuf; |
190 | buf = nbuf; |
| 193 | res = sz; |
191 | res = sz; |
| 194 | } |
192 | } |
| … | |
… | |
| 223 | template<class I> |
221 | template<class I> |
| 224 | simplevec (I first, I last) |
222 | simplevec (I first, I last) |
| 225 | { |
223 | { |
| 226 | sze = res = last - first; |
224 | sze = res = last - first; |
| 227 | buf = alloc (sze); |
225 | buf = alloc (sze); |
| 228 | copy (buf, first, sze); |
226 | copy (buf, first, sze, cop_new); |
| 229 | } |
227 | } |
| 230 | |
228 | |
| 231 | simplevec (const simplevec<T> &v) |
229 | simplevec (const simplevec<T> &v) |
| 232 | : sze(0), res(0), buf(0) |
230 | : sze(0), res(0), buf(0) |
| 233 | { |
231 | { |
| 234 | sze = res = v.size (); |
232 | sze = res = v.size (); |
| 235 | buf = alloc (sze); |
233 | buf = alloc (sze); |
| 236 | copy (buf, v.begin (), sze); |
234 | copy (buf, v.begin (), sze, cop_new); |
| 237 | } |
235 | } |
| 238 | |
236 | |
| 239 | ~simplevec () |
237 | ~simplevec () |
| 240 | { |
238 | { |
| 241 | dealloc (); |
239 | dealloc (); |
| … | |
… | |
| 320 | *i++ = t; |
318 | *i++ = t; |
| 321 | |
319 | |
| 322 | return buf + at; |
320 | return buf + at; |
| 323 | } |
321 | } |
| 324 | |
322 | |
| 325 | void erase (iterator first, iterator last) |
323 | iterator erase (iterator first, iterator last) |
| 326 | { |
324 | { |
| 327 | size_t n = last - first; |
325 | size_t n = last - first; |
| 328 | |
326 | |
| 329 | if (is_simple_enough ()) |
327 | if (is_simple_enough ()) |
| 330 | memmove (first, last, sizeof (T) * n); |
328 | memmove (first, last, sizeof (T) * n); |
| 331 | else |
329 | else |
| 332 | copy<iterator> (first, last, n, cop_new); |
330 | copy<iterator> (first, last, n, cop_set); |
| 333 | |
331 | |
| 334 | sze -= n; |
332 | sze -= n; |
| 335 | destruct (buf + sze, n); |
333 | destruct (buf + sze, n); |
| 336 | } |
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| 337 | |
334 | |
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335 | return first; |
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|
336 | } |
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337 | |
| 338 | void erase (iterator pos) |
338 | iterator erase (iterator pos) |
| 339 | { |
339 | { |
| 340 | if (pos != end ()) |
340 | if (pos != end ()) |
| 341 | erase (pos, pos + 1); |
341 | erase (pos, pos + 1); |
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342 | |
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343 | return pos; |
| 342 | } |
344 | } |
| 343 | }; |
345 | }; |
| 344 | |
346 | |
| 345 | template<class T> |
347 | template<class T> |
| 346 | bool operator ==(const simplevec<T> &v1, const simplevec<T> &v2) |
348 | bool operator ==(const simplevec<T> &v1, const simplevec<T> &v2) |
