… | |
… | |
55 | #endif |
55 | #endif |
56 | |
56 | |
57 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
57 | // use C0X decltype for auto declarations until ISO C++ sanctifies them (if ever) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
58 | #define auto(var,expr) decltype(expr) var = (expr) |
59 | |
59 | |
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60 | #if cplusplus_does_not_suck |
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|
61 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
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62 | template<typename T, int N> |
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63 | static inline int array_length (const T (&arr)[N]) |
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64 | { |
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65 | return N; |
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66 | } |
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67 | #else |
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68 | #define array_length(name) (sizeof (name) / sizeof (name [0])) |
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69 | #endif |
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70 | |
60 | // very ugly macro that basically declares and initialises a variable |
71 | // very ugly macro that basically declares and initialises a variable |
61 | // that is in scope for the next statement only |
72 | // that is in scope for the next statement only |
62 | // works only for stuff that can be assigned 0 and converts to false |
73 | // works only for stuff that can be assigned 0 and converts to false |
63 | // (note: works great for pointers) |
74 | // (note: works great for pointers) |
64 | // most ugly macro I ever wrote |
75 | // most ugly macro I ever wrote |
… | |
… | |
93 | // sign returns -1 or +1 |
104 | // sign returns -1 or +1 |
94 | template<typename T> |
105 | template<typename T> |
95 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
106 | static inline T sign (T v) { return v < 0 ? -1 : +1; } |
96 | // relies on 2c representation |
107 | // relies on 2c representation |
97 | template<> |
108 | template<> |
98 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
109 | inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); } |
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110 | template<> |
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111 | inline sint16 sign (sint16 v) { return 1 - (sint16 (uint16 (v) >> 15) * 2); } |
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112 | template<> |
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113 | inline sint32 sign (sint32 v) { return 1 - (sint32 (uint32 (v) >> 31) * 2); } |
99 | |
114 | |
100 | // sign0 returns -1, 0 or +1 |
115 | // sign0 returns -1, 0 or +1 |
101 | template<typename T> |
116 | template<typename T> |
102 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
117 | static inline T sign0 (T v) { return v ? sign (v) : 0; } |
103 | |
118 | |
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|
119 | //clashes with C++0x |
104 | template<typename T, typename U> |
120 | template<typename T, typename U> |
105 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
121 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
106 | |
122 | |
107 | // div* only work correctly for div > 0 |
123 | // div* only work correctly for div > 0 |
108 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
124 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
109 | template<typename T> static inline T div (T val, T div) |
125 | template<typename T> static inline T div (T val, T div) |
110 | { |
126 | { |
111 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
127 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
112 | } |
128 | } |
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129 | |
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130 | template<> inline float div (float val, float div) { return val / div; } |
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131 | template<> inline double div (double val, double div) { return val / div; } |
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132 | |
113 | // div, round-up |
133 | // div, round-up |
114 | template<typename T> static inline T div_ru (T val, T div) |
134 | template<typename T> static inline T div_ru (T val, T div) |
115 | { |
135 | { |
116 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
136 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
117 | } |
137 | } |
… | |
… | |
410 | { |
430 | { |
411 | p->~Tp (); |
431 | p->~Tp (); |
412 | } |
432 | } |
413 | }; |
433 | }; |
414 | |
434 | |
415 | // P. L'Ecuyer, “Maximally Equidistributed Combined Tausworthe Generators”, Mathematics of Computation, 65, 213 (1996), 203–213. |
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416 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme.ps |
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417 | // http://www.iro.umontreal.ca/~lecuyer/myftp/papers/tausme2.ps |
|
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418 | struct tausworthe_random_generator |
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419 | { |
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420 | uint32_t state [4]; |
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421 | |
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422 | void operator =(const tausworthe_random_generator &src) |
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423 | { |
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424 | state [0] = src.state [0]; |
|
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425 | state [1] = src.state [1]; |
|
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426 | state [2] = src.state [2]; |
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427 | state [3] = src.state [3]; |
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428 | } |
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429 | |
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430 | void seed (uint32_t seed); |
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431 | uint32_t next (); |
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432 | }; |
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433 | |
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434 | // Xorshift RNGs, George Marsaglia |
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435 | // http://www.jstatsoft.org/v08/i14/paper |
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436 | // this one is about 40% faster than the tausworthe one above (i.e. not much), |
|
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437 | // despite the inlining, and has the issue of only creating 2**32-1 numbers. |
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438 | // see also http://www.iro.umontreal.ca/~lecuyer/myftp/papers/xorshift.pdf |
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439 | struct xorshift_random_generator |
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440 | { |
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441 | uint32_t x, y; |
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442 | |
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443 | void operator =(const xorshift_random_generator &src) |
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444 | { |
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445 | x = src.x; |
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446 | y = src.y; |
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447 | } |
|
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448 | |
|
|
449 | void seed (uint32_t seed) |
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450 | { |
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451 | x = seed; |
|
|
452 | y = seed * 69069U; |
|
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453 | } |
|
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454 | |
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455 | uint32_t next () |
|
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456 | { |
|
|
457 | uint32_t t = x ^ (x << 10); |
|
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458 | x = y; |
|
|
459 | y = y ^ (y >> 13) ^ t ^ (t >> 10); |
|
|
460 | return y; |
|
|
461 | } |
|
|
462 | }; |
|
|
463 | |
|
|
464 | template<class generator> |
|
|
465 | struct random_number_generator : generator |
|
|
466 | { |
|
|
467 | // uniform distribution, 0 .. max (0, num - 1) |
|
|
468 | uint32_t operator ()(uint32_t num) |
|
|
469 | { |
|
|
470 | return !is_constant (num) ? get_range (num) // non-constant |
|
|
471 | : num & (num - 1) ? (this->next () * (uint64_t)num) >> 32U // constant, non-power-of-two |
|
|
472 | : this->next () & (num - 1); // constant, power-of-two |
|
|
473 | } |
|
|
474 | |
|
|
475 | // return a number within the closed interval [min .. max] |
|
|
476 | int operator () (int r_min, int r_max) |
|
|
477 | { |
|
|
478 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
|
|
479 | ? r_min + operator ()(r_max - r_min + 1) |
|
|
480 | : get_range (r_min, r_max); |
|
|
481 | } |
|
|
482 | |
|
|
483 | // return a number within the closed interval [0..1] |
|
|
484 | double operator ()() |
|
|
485 | { |
|
|
486 | return this->next () / (double)0xFFFFFFFFU; |
|
|
487 | } |
|
|
488 | |
|
|
489 | protected: |
|
|
490 | uint32_t get_range (uint32_t r_max); |
|
|
491 | int get_range (int r_min, int r_max); |
|
|
492 | }; |
|
|
493 | |
|
|
494 | typedef random_number_generator<tausworthe_random_generator> rand_gen; |
|
|
495 | |
|
|
496 | extern rand_gen rndm, rmg_rndm; |
|
|
497 | |
|
|
498 | INTERFACE_CLASS (attachable) |
435 | INTERFACE_CLASS (attachable) |
499 | struct refcnt_base |
436 | struct refcnt_base |
500 | { |
437 | { |
501 | typedef int refcnt_t; |
438 | typedef int refcnt_t; |
502 | mutable refcnt_t ACC (RW, refcnt); |
439 | mutable refcnt_t ACC (RW, refcnt); |
… | |
… | |
563 | typedef refptr<maptile> maptile_ptr; |
500 | typedef refptr<maptile> maptile_ptr; |
564 | typedef refptr<object> object_ptr; |
501 | typedef refptr<object> object_ptr; |
565 | typedef refptr<archetype> arch_ptr; |
502 | typedef refptr<archetype> arch_ptr; |
566 | typedef refptr<client> client_ptr; |
503 | typedef refptr<client> client_ptr; |
567 | typedef refptr<player> player_ptr; |
504 | typedef refptr<player> player_ptr; |
|
|
505 | typedef refptr<region> region_ptr; |
568 | |
506 | |
569 | #define STRHSH_NULL 2166136261 |
507 | #define STRHSH_NULL 2166136261 |
570 | |
508 | |
571 | static inline uint32_t |
509 | static inline uint32_t |
572 | strhsh (const char *s) |
510 | strhsh (const char *s) |
… | |
… | |
574 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
512 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
575 | // it is about twice as fast as the one-at-a-time one, |
513 | // it is about twice as fast as the one-at-a-time one, |
576 | // with good distribution. |
514 | // with good distribution. |
577 | // FNV-1a is faster on many cpus because the multiplication |
515 | // FNV-1a is faster on many cpus because the multiplication |
578 | // runs concurrently with the looping logic. |
516 | // runs concurrently with the looping logic. |
|
|
517 | // we modify the hash a bit to improve its distribution |
579 | uint32_t hash = STRHSH_NULL; |
518 | uint32_t hash = STRHSH_NULL; |
580 | |
519 | |
581 | while (*s) |
520 | while (*s) |
582 | hash = (hash ^ *s++) * 16777619U; |
521 | hash = (hash ^ *s++) * 16777619U; |
583 | |
522 | |
584 | return hash; |
523 | return hash ^ (hash >> 16); |
585 | } |
524 | } |
586 | |
525 | |
587 | static inline uint32_t |
526 | static inline uint32_t |
588 | memhsh (const char *s, size_t len) |
527 | memhsh (const char *s, size_t len) |
589 | { |
528 | { |
… | |
… | |
704 | { |
643 | { |
705 | erase (&obj); |
644 | erase (&obj); |
706 | } |
645 | } |
707 | }; |
646 | }; |
708 | |
647 | |
|
|
648 | ///////////////////////////////////////////////////////////////////////////// |
|
|
649 | |
|
|
650 | // something like a vector or stack, but without |
|
|
651 | // out of bounds checking |
|
|
652 | template<typename T> |
|
|
653 | struct fixed_stack |
|
|
654 | { |
|
|
655 | T *data; |
|
|
656 | int size; |
|
|
657 | int max; |
|
|
658 | |
|
|
659 | fixed_stack () |
|
|
660 | : size (0), data (0) |
|
|
661 | { |
|
|
662 | } |
|
|
663 | |
|
|
664 | fixed_stack (int max) |
|
|
665 | : size (0), max (max) |
|
|
666 | { |
|
|
667 | data = salloc<T> (max); |
|
|
668 | } |
|
|
669 | |
|
|
670 | void reset (int new_max) |
|
|
671 | { |
|
|
672 | sfree (data, max); |
|
|
673 | size = 0; |
|
|
674 | max = new_max; |
|
|
675 | data = salloc<T> (max); |
|
|
676 | } |
|
|
677 | |
|
|
678 | void free () |
|
|
679 | { |
|
|
680 | sfree (data, max); |
|
|
681 | data = 0; |
|
|
682 | } |
|
|
683 | |
|
|
684 | ~fixed_stack () |
|
|
685 | { |
|
|
686 | sfree (data, max); |
|
|
687 | } |
|
|
688 | |
|
|
689 | T &operator[](int idx) |
|
|
690 | { |
|
|
691 | return data [idx]; |
|
|
692 | } |
|
|
693 | |
|
|
694 | void push (T v) |
|
|
695 | { |
|
|
696 | data [size++] = v; |
|
|
697 | } |
|
|
698 | |
|
|
699 | T &pop () |
|
|
700 | { |
|
|
701 | return data [--size]; |
|
|
702 | } |
|
|
703 | |
|
|
704 | T remove (int idx) |
|
|
705 | { |
|
|
706 | T v = data [idx]; |
|
|
707 | |
|
|
708 | data [idx] = data [--size]; |
|
|
709 | |
|
|
710 | return v; |
|
|
711 | } |
|
|
712 | }; |
|
|
713 | |
|
|
714 | ///////////////////////////////////////////////////////////////////////////// |
|
|
715 | |
709 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
716 | // basically does what strncpy should do, but appends "..." to strings exceeding length |
710 | // returns the number of bytes actually used (including \0) |
717 | // returns the number of bytes actually used (including \0) |
711 | int assign (char *dst, const char *src, int maxsize); |
718 | int assign (char *dst, const char *src, int maxsize); |
712 | |
719 | |
713 | // type-safe version of assign |
720 | // type-safe version of assign |