| … | |
… | |
| 6 | #else |
6 | #else |
| 7 | # define is_constant(c) 0 |
7 | # define is_constant(c) 0 |
| 8 | #endif |
8 | #endif |
| 9 | |
9 | |
| 10 | #include <cstddef> |
10 | #include <cstddef> |
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|
11 | #include <cmath> |
| 11 | #include <new> |
12 | #include <new> |
| 12 | #include <vector> |
13 | #include <vector> |
| 13 | |
14 | |
| 14 | #include <glib.h> |
15 | #include <glib.h> |
| 15 | |
16 | |
| … | |
… | |
| 31 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
32 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
| 32 | |
33 | |
| 33 | // in range excluding end |
34 | // in range excluding end |
| 34 | #define IN_RANGE_EXC(val,beg,end) \ |
35 | #define IN_RANGE_EXC(val,beg,end) \ |
| 35 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
36 | ((unsigned int)(val) - (unsigned int)(beg) < (unsigned int)(end) - (unsigned int)(beg)) |
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37 | |
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38 | void fork_abort (const char *msg); |
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39 | |
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40 | // this is much faster than crossfires original algorithm |
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41 | // on modern cpus |
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42 | inline int |
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43 | isqrt (int n) |
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44 | { |
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45 | return (int)sqrtf ((float)n); |
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46 | } |
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47 | |
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48 | // this is only twice as fast as naive sqrtf (dx*dy+dy*dy) |
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49 | #if 0 |
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50 | // and has a max. error of 6 in the range -100..+100. |
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51 | #else |
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52 | // and has a max. error of 9 in the range -100..+100. |
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53 | #endif |
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54 | inline int |
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55 | idistance (int dx, int dy) |
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56 | { |
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57 | unsigned int dx_ = abs (dx); |
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58 | unsigned int dy_ = abs (dy); |
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59 | |
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60 | #if 0 |
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61 | return dx_ > dy_ |
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62 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
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63 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
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64 | #else |
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65 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
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66 | #endif |
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67 | } |
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68 | |
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69 | /* |
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70 | * absdir(int): Returns a number between 1 and 8, which represent |
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71 | * the "absolute" direction of a number (it actually takes care of |
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72 | * "overflow" in previous calculations of a direction). |
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73 | */ |
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74 | inline int |
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75 | absdir (int d) |
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76 | { |
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77 | return ((d - 1) & 7) + 1; |
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78 | } |
| 36 | |
79 | |
| 37 | // makes dynamically allocated objects zero-initialised |
80 | // makes dynamically allocated objects zero-initialised |
| 38 | struct zero_initialised |
81 | struct zero_initialised |
| 39 | { |
82 | { |
| 40 | void *operator new (size_t s, void *p) |
83 | void *operator new (size_t s, void *p) |
