1 | /* |
1 | /* |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
2 | * This file is part of Deliantra, the Roguelike Realtime MMORPG. |
3 | * |
3 | * |
4 | * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
5 | * |
5 | * |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
6 | * Deliantra is free software: you can redistribute it and/or modify it under |
7 | * the terms of the Affero GNU General Public License as published by the |
7 | * the terms of the Affero GNU General Public License as published by the |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
8 | * Free Software Foundation, either version 3 of the License, or (at your |
9 | * option) any later version. |
9 | * option) any later version. |
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186 | int32_t d = b - a; |
186 | int32_t d = b - a; |
187 | d &= d >> 31; |
187 | d &= d >> 31; |
188 | return b - d; |
188 | return b - d; |
189 | } |
189 | } |
190 | |
190 | |
191 | // this is much faster than crossfires original algorithm |
191 | // this is much faster than crossfire's original algorithm |
192 | // on modern cpus |
192 | // on modern cpus |
193 | inline int |
193 | inline int |
194 | isqrt (int n) |
194 | isqrt (int n) |
195 | { |
195 | { |
196 | return (int)sqrtf ((float)n); |
196 | return (int)sqrtf ((float)n); |
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240 | absdir (int d) |
240 | absdir (int d) |
241 | { |
241 | { |
242 | return ((d - 1) & 7) + 1; |
242 | return ((d - 1) & 7) + 1; |
243 | } |
243 | } |
244 | |
244 | |
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245 | // avoid ctz name because netbsd or freebsd spams it's namespace with it |
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246 | #if GCC_VERSION(3,4) |
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247 | static inline int least_significant_bit (uint32_t x) |
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248 | { |
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249 | return __builtin_ctz (x); |
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250 | } |
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251 | #else |
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252 | int least_significant_bit (uint32_t x); |
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253 | #endif |
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254 | |
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255 | #define for_all_bits_sparse_32(mask, idxvar) \ |
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256 | for (uint32_t idxvar, mask_ = mask; \ |
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257 | mask_ && ((idxvar = least_significant_bit (mask_)), mask_ &= ~(1 << idxvar), 1);) |
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258 | |
245 | extern ssize_t slice_alloc; // statistics |
259 | extern ssize_t slice_alloc; // statistics |
246 | |
260 | |
247 | void *salloc_ (int n) throw (std::bad_alloc); |
261 | void *salloc_ (int n) throw (std::bad_alloc); |
248 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
262 | void *salloc_ (int n, void *src) throw (std::bad_alloc); |
249 | |
263 | |
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546 | typedef refptr<object> object_ptr; |
560 | typedef refptr<object> object_ptr; |
547 | typedef refptr<archetype> arch_ptr; |
561 | typedef refptr<archetype> arch_ptr; |
548 | typedef refptr<client> client_ptr; |
562 | typedef refptr<client> client_ptr; |
549 | typedef refptr<player> player_ptr; |
563 | typedef refptr<player> player_ptr; |
550 | |
564 | |
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565 | #define STRHSH_NULL 2166136261 |
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566 | |
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567 | static inline uint32_t |
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568 | strhsh (const char *s) |
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569 | { |
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570 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
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571 | // it is about twice as fast as the one-at-a-time one, |
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572 | // with good distribution. |
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573 | // FNV-1a is faster on many cpus because the multiplication |
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574 | // runs concurrently with the looping logic. |
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575 | uint32_t hash = STRHSH_NULL; |
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576 | |
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577 | while (*s) |
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578 | hash = (hash ^ *s++) * 16777619U; |
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579 | |
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580 | return hash; |
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581 | } |
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582 | |
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583 | static inline uint32_t |
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584 | memhsh (const char *s, size_t len) |
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585 | { |
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586 | uint32_t hash = STRHSH_NULL; |
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587 | |
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588 | while (len--) |
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589 | hash = (hash ^ *s++) * 16777619U; |
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590 | |
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591 | return hash; |
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592 | } |
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593 | |
551 | struct str_hash |
594 | struct str_hash |
552 | { |
595 | { |
553 | std::size_t operator ()(const char *s) const |
596 | std::size_t operator ()(const char *s) const |
554 | { |
597 | { |
555 | #if 0 |
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556 | uint32_t hash = 0; |
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557 | |
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558 | /* use the one-at-a-time hash function, which supposedly is |
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559 | * better than the djb2-like one used by perl5.005, but |
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560 | * certainly is better then the bug used here before. |
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561 | * see http://burtleburtle.net/bob/hash/doobs.html |
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562 | */ |
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563 | while (*s) |
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564 | { |
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565 | hash += *s++; |
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566 | hash += hash << 10; |
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567 | hash ^= hash >> 6; |
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568 | } |
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569 | |
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570 | hash += hash << 3; |
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571 | hash ^= hash >> 11; |
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572 | hash += hash << 15; |
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573 | #else |
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574 | // use FNV-1a hash (http://isthe.com/chongo/tech/comp/fnv/) |
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575 | // it is about twice as fast as the one-at-a-time one, |
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576 | // with good distribution. |
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577 | // FNV-1a is faster on many cpus because the multiplication |
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578 | // runs concurrent with the looping logic. |
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579 | uint32_t hash = 2166136261; |
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580 | |
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581 | while (*s) |
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582 | hash = (hash ^ *s++) * 16777619; |
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583 | #endif |
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584 | |
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585 | return hash; |
598 | return strhsh (s); |
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599 | } |
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600 | |
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601 | std::size_t operator ()(const shstr &s) const |
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602 | { |
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603 | return strhsh (s); |
586 | } |
604 | } |
587 | }; |
605 | }; |
588 | |
606 | |
589 | struct str_equal |
607 | struct str_equal |
590 | { |
608 | { |