| … | |
… | |
| 58 | #if 0 |
58 | #if 0 |
| 59 | return dx_ > dy_ |
59 | return dx_ > dy_ |
| 60 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
60 | ? (dx_ * 61685 + dy_ * 26870) >> 16 |
| 61 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
61 | : (dy_ * 61685 + dx_ * 26870) >> 16; |
| 62 | #else |
62 | #else |
| 63 | return dx + dy - min (dx, dy) * 5 / 8; |
63 | return dx_ + dy_ - min (dx_, dy_) * 5 / 8; |
| 64 | #endif |
64 | #endif |
| 65 | } |
65 | } |
| 66 | |
66 | |
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67 | /* |
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68 | * absdir(int): Returns a number between 1 and 8, which represent |
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69 | * the "absolute" direction of a number (it actually takes care of |
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70 | * "overflow" in previous calculations of a direction). |
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71 | */ |
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72 | inline int |
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73 | absdir (int d) |
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74 | { |
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75 | return ((d - 1) & 7) + 1; |
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76 | } |
| 67 | |
77 | |
| 68 | // makes dynamically allocated objects zero-initialised |
78 | // makes dynamically allocated objects zero-initialised |
| 69 | struct zero_initialised |
79 | struct zero_initialised |
| 70 | { |
80 | { |
| 71 | void *operator new (size_t s, void *p) |
81 | void *operator new (size_t s, void *p) |
