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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 |
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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; } |
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118 | |
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119 | template<typename T, typename U> |
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120 | static inline T copysign (T a, U b) { return a > 0 ? b : -b; } |
103 | |
121 | |
104 | // div* only work correctly for div > 0 |
122 | // div* only work correctly for div > 0 |
105 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
123 | // div, with correct rounding (< 0.5 downwards, >=0.5 upwards) |
106 | template<typename T> static inline T div (T val, T div) |
124 | template<typename T> static inline T div (T val, T div) |
107 | { |
125 | { |
108 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
126 | return expect_false (val < 0) ? - ((-val + (div - 1) / 2) / div) : (val + div / 2) / div; |
109 | } |
127 | } |
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128 | |
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129 | template<> inline float div (float val, float div) { return val / div; } |
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130 | template<> inline double div (double val, double div) { return val / div; } |
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131 | |
110 | // div, round-up |
132 | // div, round-up |
111 | template<typename T> static inline T div_ru (T val, T div) |
133 | template<typename T> static inline T div_ru (T val, T div) |
112 | { |
134 | { |
113 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
135 | return expect_false (val < 0) ? - ((-val ) / div) : (val + div - 1) / div; |
114 | } |
136 | } |
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459 | }; |
481 | }; |
460 | |
482 | |
461 | template<class generator> |
483 | template<class generator> |
462 | struct random_number_generator : generator |
484 | struct random_number_generator : generator |
463 | { |
485 | { |
464 | // uniform distribution, 0 .. max (0, num - 1) |
486 | // uniform distribution, [0 .. num - 1] |
465 | uint32_t operator ()(uint32_t num) |
487 | uint32_t operator ()(uint32_t num) |
466 | { |
488 | { |
467 | return !is_constant (num) ? get_range (num) // non-constant |
489 | return !is_constant (num) ? get_range (num) // non-constant |
468 | : num & (num - 1) ? (this->next () * (uint64_t)num) >> 32U // constant, non-power-of-two |
490 | : num & (num - 1) ? (this->next () * (uint64_t)num) >> 32U // constant, non-power-of-two |
469 | : this->next () & (num - 1); // constant, power-of-two |
491 | : this->next () & (num - 1); // constant, power-of-two |
470 | } |
492 | } |
471 | |
493 | |
472 | // return a number within (min .. max) |
494 | // return a number within the closed interval [min .. max] |
473 | int operator () (int r_min, int r_max) |
495 | int operator () (int r_min, int r_max) |
474 | { |
496 | { |
475 | return is_constant (r_min) && is_constant (r_max) && r_min <= r_max |
497 | return is_constant (r_min <= r_max) && r_min <= r_max |
476 | ? r_min + operator ()(r_max - r_min + 1) |
498 | ? r_min + operator ()(r_max - r_min + 1) |
477 | : get_range (r_min, r_max); |
499 | : get_range (r_min, r_max); |
478 | } |
500 | } |
479 | |
501 | |
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502 | // return a number within the half-open interval [0..1[ |
480 | double operator ()() |
503 | double operator ()() |
481 | { |
504 | { |
482 | return this->next () / (double)0xFFFFFFFFU; |
505 | return this->next () / (double)0x100000000; |
483 | } |
506 | } |
484 | |
507 | |
485 | protected: |
508 | protected: |
486 | uint32_t get_range (uint32_t r_max); |
509 | uint32_t get_range (uint32_t r_max); |
487 | int get_range (int r_min, int r_max); |
510 | int get_range (int r_min, int r_max); |
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559 | typedef refptr<maptile> maptile_ptr; |
582 | typedef refptr<maptile> maptile_ptr; |
560 | typedef refptr<object> object_ptr; |
583 | typedef refptr<object> object_ptr; |
561 | typedef refptr<archetype> arch_ptr; |
584 | typedef refptr<archetype> arch_ptr; |
562 | typedef refptr<client> client_ptr; |
585 | typedef refptr<client> client_ptr; |
563 | typedef refptr<player> player_ptr; |
586 | typedef refptr<player> player_ptr; |
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587 | typedef refptr<region> region_ptr; |
564 | |
588 | |
565 | #define STRHSH_NULL 2166136261 |
589 | #define STRHSH_NULL 2166136261 |
566 | |
590 | |
567 | static inline uint32_t |
591 | static inline uint32_t |
568 | strhsh (const char *s) |
592 | strhsh (const char *s) |
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573 | // FNV-1a is faster on many cpus because the multiplication |
597 | // FNV-1a is faster on many cpus because the multiplication |
574 | // runs concurrently with the looping logic. |
598 | // runs concurrently with the looping logic. |
575 | uint32_t hash = STRHSH_NULL; |
599 | uint32_t hash = STRHSH_NULL; |
576 | |
600 | |
577 | while (*s) |
601 | while (*s) |
578 | hash = (hash ^ *s++) * 16777619; |
602 | hash = (hash ^ *s++) * 16777619U; |
579 | |
603 | |
580 | return hash; |
604 | return hash; |
581 | } |
605 | } |
582 | |
606 | |
583 | static inline uint32_t |
607 | static inline uint32_t |
584 | memhsh (const char *s, size_t len) |
608 | memhsh (const char *s, size_t len) |
585 | { |
609 | { |
586 | uint32_t hash = STRHSH_NULL; |
610 | uint32_t hash = STRHSH_NULL; |
587 | |
611 | |
588 | while (len--) |
612 | while (len--) |
589 | hash = (hash ^ *s++) * 16777619; |
613 | hash = (hash ^ *s++) * 16777619U; |
590 | |
614 | |
591 | return hash; |
615 | return hash; |
592 | } |
616 | } |
593 | |
617 | |
594 | struct str_hash |
618 | struct str_hash |