| … | |
… | |
| 53 | #include <glib.h> |
53 | #include <glib.h> |
| 54 | |
54 | |
| 55 | #include <shstr.h> |
55 | #include <shstr.h> |
| 56 | #include <traits.h> |
56 | #include <traits.h> |
| 57 | |
57 | |
| 58 | // use a gcc extension for auto declarations until ISO C++ sanctifies them |
58 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
| 59 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | #define auto(var,expr) decltype(expr) var = (expr) |
| 60 | |
60 | |
| 61 | // very ugly macro that basicaly declares and initialises a variable |
61 | // very ugly macro that basicaly declares and initialises a variable |
| 62 | // that is in scope for the next statement only |
62 | // that is in scope for the next statement only |
| 63 | // works only for stuff that can be assigned 0 and converts to false |
63 | // works only for stuff that can be assigned 0 and converts to false |
| 64 | // (note: works great for pointers) |
64 | // (note: works great for pointers) |
| 65 | // most ugly macro I ever wrote |
65 | // most ugly macro I ever wrote |
| 66 | #define declvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
66 | #define statementvar(type, name, value) if (type name = 0) { } else if (((name) = (value)), 1) |
| 67 | |
67 | |
| 68 | // in range including end |
68 | // in range including end |
| 69 | #define IN_RANGE_INC(val,beg,end) \ |
69 | #define IN_RANGE_INC(val,beg,end) \ |
| 70 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
70 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
| 71 | |
71 | |
| … | |
… | |
| 405 | { |
405 | { |
| 406 | return !strcmp (a, b); |
406 | return !strcmp (a, b); |
| 407 | } |
407 | } |
| 408 | }; |
408 | }; |
| 409 | |
409 | |
|
|
410 | // Mostly the same as std::vector, but insert/erase can reorder |
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411 | // the elements, making insret/remove O(1) instead of O(n). |
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412 | // |
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|
413 | // NOTE: only some forms of erase/insert are available |
| 410 | template<class T> |
414 | template<class T> |
| 411 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
415 | struct unordered_vector : std::vector<T, slice_allocator<T> > |
| 412 | { |
416 | { |
| 413 | typedef typename unordered_vector::iterator iterator; |
417 | typedef typename unordered_vector::iterator iterator; |
| 414 | |
418 | |
| … | |
… | |
| 424 | { |
428 | { |
| 425 | erase ((unsigned int )(i - this->begin ())); |
429 | erase ((unsigned int )(i - this->begin ())); |
| 426 | } |
430 | } |
| 427 | }; |
431 | }; |
| 428 | |
432 | |
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|
433 | // This container blends advantages of linked lists |
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434 | // (efficiency) with vectors (random access) by |
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435 | // by using an unordered vector and storing the vector |
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436 | // index inside the object. |
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437 | // |
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438 | // + memory-efficient on most 64 bit archs |
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439 | // + O(1) insert/remove |
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440 | // + free unique (but varying) id for inserted objects |
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441 | // + cache-friendly iteration |
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442 | // - only works for pointers to structs |
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443 | // |
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|
444 | // NOTE: only some forms of erase/insert are available |
| 429 | template<class T, int T::* index> |
445 | template<class T, int T::* index> |
| 430 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
446 | struct object_vector : std::vector<T *, slice_allocator<T *> > |
| 431 | { |
447 | { |
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|
448 | typedef typename object_vector::iterator iterator; |
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449 | |
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450 | bool contains (const T *obj) const |
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451 | { |
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452 | return obj->*index; |
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453 | } |
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454 | |
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455 | iterator find (const T *obj) |
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456 | { |
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457 | return obj->*index |
|
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458 | ? this->begin () + obj->*index - 1 |
|
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459 | : this->end (); |
|
|
460 | } |
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461 | |
| 432 | void insert (T *obj) |
462 | void insert (T *obj) |
| 433 | { |
463 | { |
| 434 | assert (!(obj->*index)); |
|
|
| 435 | push_back (obj); |
464 | push_back (obj); |
| 436 | obj->*index = this->size (); |
465 | obj->*index = this->size (); |
| 437 | } |
466 | } |
| 438 | |
467 | |
| 439 | void insert (T &obj) |
468 | void insert (T &obj) |
| … | |
… | |
| 441 | insert (&obj); |
470 | insert (&obj); |
| 442 | } |
471 | } |
| 443 | |
472 | |
| 444 | void erase (T *obj) |
473 | void erase (T *obj) |
| 445 | { |
474 | { |
| 446 | assert (obj->*index); |
|
|
| 447 | unsigned int pos = obj->*index; |
475 | unsigned int pos = obj->*index; |
| 448 | obj->*index = 0; |
476 | obj->*index = 0; |
| 449 | |
477 | |
| 450 | if (pos < this->size ()) |
478 | if (pos < this->size ()) |
| 451 | { |
479 | { |
