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1 | /* |
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2 | * This file is part of Crossfire TRT, the Multiplayer Online Role Playing Game. |
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3 | * |
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4 | * Copyright (©) 2005,2006,2007 Marc Alexander Lehmann / Robin Redeker / the Crossfire TRT team |
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5 | * |
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6 | * Crossfire TRT is free software; you can redistribute it and/or modify it |
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7 | * under the terms of the GNU General Public License as published by the Free |
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8 | * Software Foundation; either version 2 of the License, or (at your option) |
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9 | * any later version. |
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10 | * |
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11 | * This program is distributed in the hope that it will be useful, but |
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12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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14 | * for more details. |
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15 | * |
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16 | * You should have received a copy of the GNU General Public License along |
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17 | * with Crossfire TRT; if not, write to the Free Software Foundation, Inc. 51 |
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18 | * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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19 | * |
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20 | * The authors can be reached via e-mail to <crossfire@schmorp.de> |
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21 | */ |
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22 | |
| 1 | #ifndef UTIL_H__ |
23 | #ifndef UTIL_H__ |
| 2 | #define UTIL_H__ |
24 | #define UTIL_H__ |
| 3 | |
25 | |
| 4 | //#define PREFER_MALLOC |
26 | //#define PREFER_MALLOC |
| 5 | |
27 | |
| 6 | #if __GNUC__ >= 3 |
28 | #if __GNUC__ >= 3 |
| 7 | # define is_constant(c) __builtin_constant_p (c) |
29 | # define is_constant(c) __builtin_constant_p (c) |
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30 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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31 | # define prefetch(addr,rw,locality) __builtin_prefetch (addr, rw, locality) |
| 8 | #else |
32 | #else |
| 9 | # define is_constant(c) 0 |
33 | # define is_constant(c) 0 |
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34 | # define expect(expr,value) (expr) |
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35 | # define prefetch(addr,rw,locality) |
| 10 | #endif |
36 | #endif |
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37 | |
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38 | // put into ifs if you are very sure that the expression |
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39 | // is mostly true or mosty false. note that these return |
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40 | // booleans, not the expression. |
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41 | #define expect_false(expr) expect ((expr) != 0, 0) |
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42 | #define expect_true(expr) expect ((expr) != 0, 1) |
| 11 | |
43 | |
| 12 | #include <cstddef> |
44 | #include <cstddef> |
| 13 | #include <cmath> |
45 | #include <cmath> |
| 14 | #include <new> |
46 | #include <new> |
| 15 | #include <vector> |
47 | #include <vector> |
| … | |
… | |
| 44 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
76 | template<typename T, typename U> static inline T min (T a, U b) { return (U)a < b ? (U)a : b; } |
| 45 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
77 | template<typename T, typename U> static inline T max (T a, U b) { return (U)a > b ? (U)a : b; } |
| 46 | template<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; } |
78 | template<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; } |
| 47 | |
79 | |
| 48 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
80 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
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81 | |
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82 | template<typename T> |
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83 | static inline T |
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84 | lerp (T val, T min_in, T max_in, T min_out, T max_out) |
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85 | { |
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86 | return (val - min_in) * (max_out - min_out) / (max_in - min_in) + min_out; |
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87 | } |
| 49 | |
88 | |
| 50 | // lots of stuff taken from FXT |
89 | // lots of stuff taken from FXT |
| 51 | |
90 | |
| 52 | /* Rotate right. This is used in various places for checksumming */ |
91 | /* Rotate right. This is used in various places for checksumming */ |
| 53 | //TODO: that sucks, use a better checksum algo |
92 | //TODO: that sucks, use a better checksum algo |
| … | |
… | |
| 434 | // return current time as timestampe |
473 | // return current time as timestampe |
| 435 | tstamp now (); |
474 | tstamp now (); |
| 436 | |
475 | |
| 437 | int similar_direction (int a, int b); |
476 | int similar_direction (int a, int b); |
| 438 | |
477 | |
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478 | // like printf, but returns a std::string |
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479 | const std::string format (const char *format, ...); |
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480 | |
| 439 | #endif |
481 | #endif |
| 440 | |
482 | |
