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Comparing deliantra/server/include/util.h (file contents):
Revision 1.72 by root, Wed Apr 30 16:26:28 2008 UTC vs.
Revision 1.79 by root, Fri Dec 19 22:47:29 2008 UTC

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 Marc Alexander Lehmann / Robin Redeker / the Deliantra team 4 * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
5 * 5 *
6 * Deliantra is free software: you can redistribute it and/or modify 6 * Deliantra is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by 7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or 8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version. 9 * (at your option) any later version.
… …
96// as a is often a constant while b is the variable. it is still a bug, though. 96// as a is often a constant while b is the variable. it is still a bug, though.
97template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } 97template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; }
98template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } 98template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; }
99template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; } 99template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? (T)a : v >(T)b ? (T)b : v; }
100 100
101template<typename T> static inline void min_it (T &v, T m) { v = min (v, m); }
102template<typename T> static inline void max_it (T &v, T m) { v = max (v, m); }
103template<typename T> static inline void clamp_it (T &v, T a, T b) { v = clamp (v, a, b); }
104
101template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } 105template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
102 106
103template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); } 107template<typename T, typename U, typename V> static inline T min (T a, U b, V c) { return min (a, min (b, c)); }
104template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); } 108template<typename T, typename U, typename V> static inline T max (T a, U b, V c) { return max (a, max (b, c)); }
105 109
110// sign returns -1 or +1
111template<typename T>
112static inline T sign (T v) { return v < 0 ? -1 : +1; }
113// relies on 2c representation
114template<>
115inline sint8 sign (sint8 v) { return 1 - (sint8 (uint8 (v) >> 7) * 2); }
116
117// sign0 returns -1, 0 or +1
118template<typename T>
119static inline T sign0 (T v) { return v ? sign (v) : 0; }
120
121// div, with correct rounding (< 0.5 downwards, >=0.5 upwards)
122template<typename T> static inline T div (T val, T div) { return (val + div / 2) / div; }
123// div, round-up
124template<typename T> static inline T div_ru (T val, T div) { return (val + div - 1) / div; }
125// div, round-down
126template<typename T> static inline T div_rd (T val, T div) { return (val ) / div; }
127
106template<typename T> 128template<typename T>
107static inline T 129static inline T
108lerp (T val, T min_in, T max_in, T min_out, T max_out) 130lerp (T val, T min_in, T max_in, T min_out, T max_out)
109{ 131{
110 return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; 132 return min_out + div <T> ((val - min_in) * (max_out - min_out), max_in - min_in);
133}
134
135// lerp, round-down
136template<typename T>
137static inline T
138lerp_rd (T val, T min_in, T max_in, T min_out, T max_out)
139{
140 return min_out + div_rd<T> ((val - min_in) * (max_out - min_out), max_in - min_in);
141}
142
143// lerp, round-up
144template<typename T>
145static inline T
146lerp_ru (T val, T min_in, T max_in, T min_out, T max_out)
147{
148 return min_out + div_ru<T> ((val - min_in) * (max_out - min_out), max_in - min_in);
111} 149}
112 150
113// lots of stuff taken from FXT 151// lots of stuff taken from FXT
114 152
115/* Rotate right. This is used in various places for checksumming */ 153/* Rotate right. This is used in various places for checksumming */
… …
262 { 300 {
263 sfree ((char *)p, s); 301 sfree ((char *)p, s);
264 } 302 }
265}; 303};
266 304
305// makes dynamically allocated objects zero-initialised
306struct slice_allocated
307{
308 void *operator new (size_t s, void *p)
309 {
310 return p;
311 }
312
313 void *operator new (size_t s)
314 {
315 return salloc<char> (s);
316 }
317
318 void *operator new[] (size_t s)
319 {
320 return salloc<char> (s);
321 }
322
323 void operator delete (void *p, size_t s)
324 {
325 sfree ((char *)p, s);
326 }
327
328 void operator delete[] (void *p, size_t s)
329 {
330 sfree ((char *)p, s);
331 }
332};
333
267// a STL-compatible allocator that uses g_slice 334// a STL-compatible allocator that uses g_slice
268// boy, this is verbose 335// boy, this is verbose
269template<typename Tp> 336template<typename Tp>
270struct slice_allocator 337struct slice_allocator
271{ 338{
… …
336 } 403 }
337 404
338 void seed (uint32_t seed); 405 void seed (uint32_t seed);
339 uint32_t next (); 406 uint32_t next ();
340 407
341 // uniform distribution 408 // uniform distribution, 0 .. max (0, num - 1)
342 uint32_t operator ()(uint32_t num) 409 uint32_t operator ()(uint32_t num)
343 { 410 {
344 return is_constant (num) 411 return is_constant (num)
345 ? (next () * (uint64_t)num) >> 32U 412 ? (next () * (uint64_t)num) >> 32U
346 : get_range (num); 413 : get_range (num);
… …
364 int get_range (int r_min, int r_max); 431 int get_range (int r_min, int r_max);
365}; 432};
366 433
367typedef tausworthe_random_generator rand_gen; 434typedef tausworthe_random_generator rand_gen;
368 435
369extern rand_gen rndm; 436extern rand_gen rndm, rmg_rndm;
370 437
371INTERFACE_CLASS (attachable) 438INTERFACE_CLASS (attachable)
372struct refcnt_base 439struct refcnt_base
373{ 440{
374 typedef int refcnt_t; 441 typedef int refcnt_t;

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