| 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 (©) 2005,2006,2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann / Robin Redeker / the Deliantra team |
4 | * Copyright (©) 2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016 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. |
| … | |
… | |
| 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 | |
| 60 | #if cplusplus_does_not_suck |
60 | #if cplusplus_does_not_suck /* still sucks in codesize with gcc 6, although local types work now */ |
| 61 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
61 | // does not work for local types (http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm) |
| 62 | template<typename T, int N> |
62 | template<typename T, int N> |
| 63 | static inline int array_length (const T (&arr)[N]) |
63 | static inline int array_length (const T (&arr)[N]) |
| 64 | { |
64 | { |
| 65 | return N; |
65 | return N; |
| … | |
… | |
| 237 | #if 0 |
237 | #if 0 |
| 238 | // and has a max. error of 6 in the range -100..+100. |
238 | // and has a max. error of 6 in the range -100..+100. |
| 239 | #else |
239 | #else |
| 240 | // and has a max. error of 9 in the range -100..+100. |
240 | // and has a max. error of 9 in the range -100..+100. |
| 241 | #endif |
241 | #endif |
| 242 | inline int |
242 | inline int |
| 243 | idistance (int dx, int dy) |
243 | idistance (int dx, int dy) |
| 244 | { |
244 | { |
| 245 | unsigned int dx_ = abs (dx); |
245 | unsigned int dx_ = abs (dx); |
| 246 | unsigned int dy_ = abs (dy); |
246 | unsigned int dy_ = abs (dy); |
| 247 | |
247 | |
| 248 | #if 0 |
248 | #if 0 |
| 249 | return dx_ > dy_ |
249 | return dx_ > dy_ |
| … | |
… | |
| 407 | typedef const Tp *const_pointer; |
407 | typedef const Tp *const_pointer; |
| 408 | typedef Tp &reference; |
408 | typedef Tp &reference; |
| 409 | typedef const Tp &const_reference; |
409 | typedef const Tp &const_reference; |
| 410 | typedef Tp value_type; |
410 | typedef Tp value_type; |
| 411 | |
411 | |
| 412 | template <class U> |
412 | template <class U> |
| 413 | struct rebind |
413 | struct rebind |
| 414 | { |
414 | { |
| 415 | typedef slice_allocator<U> other; |
415 | typedef slice_allocator<U> other; |
| 416 | }; |
416 | }; |
| 417 | |
417 | |
| … | |
… | |
| 597 | // with good distribution. |
597 | // with good distribution. |
| 598 | // FNV-1a is faster on many cpus because the multiplication |
598 | // FNV-1a is faster on many cpus because the multiplication |
| 599 | // runs concurrently with the looping logic. |
599 | // runs concurrently with the looping logic. |
| 600 | // we modify the hash a bit to improve its distribution |
600 | // we modify the hash a bit to improve its distribution |
| 601 | uint32_t hash = STRHSH_NULL; |
601 | uint32_t hash = STRHSH_NULL; |
| 602 | |
602 | |
| 603 | while (*s) |
603 | while (*s) |
| 604 | hash = (hash ^ *s++) * 16777619U; |
604 | hash = (hash ^ *s++) * 16777619U; |
| 605 | |
605 | |
| 606 | return hash ^ (hash >> 16); |
606 | return hash ^ (hash >> 16); |
| 607 | } |
607 | } |
| 608 | |
608 | |
| 609 | static inline uint32_t |
609 | static inline uint32_t |
| 610 | memhsh (const char *s, size_t len) |
610 | memhsh (const char *s, size_t len) |
| 611 | { |
611 | { |
| 612 | uint32_t hash = STRHSH_NULL; |
612 | uint32_t hash = STRHSH_NULL; |
| 613 | |
613 | |
| 614 | while (len--) |
614 | while (len--) |
| 615 | hash = (hash ^ *s++) * 16777619U; |
615 | hash = (hash ^ *s++) * 16777619U; |
| 616 | |
616 | |
| 617 | return hash; |
617 | return hash; |
| 618 | } |
618 | } |
