| 1 | /* GTK - The GIMP Toolkit |
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| 2 | * Copyright (C) 2011 Chun-wei Fan <fanc999@yahoo.com.tw> |
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| 3 | * |
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| 4 | * Author: Chun-wei Fan <fanc999@yahoo.com.tw> |
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| 5 | * |
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| 6 | * This library is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * This library is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with this library. If not, see <http://www.gnu.org/licenses/>. |
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| 18 | */ |
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| 19 | |
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| 20 | #include <math.h> |
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| 21 | |
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| 22 | /* Workaround for round() for non-GCC/non-C99 compilers */ |
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| 23 | #ifndef HAVE_ROUND |
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| 24 | static inline double |
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| 25 | round (double x) |
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| 26 | { |
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| 27 | if (x >= 0) |
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| 28 | return floor (x + 0.5); |
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| 29 | else |
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| 30 | return ceil (x - 0.5); |
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| 31 | } |
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| 32 | #endif |
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| 33 | |
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| 34 | /* Workaround for lrint() for non-GCC/non-C99 compilers */ |
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| 35 | #ifndef HAVE_LRINT |
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| 36 | static inline long |
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| 37 | lrint (double x) |
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| 38 | { |
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| 39 | if (ceil (x + 0.5) == floor (x + 0.5)) |
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| 40 | { |
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| 41 | if (x < 1 && x > -1) |
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| 42 | return 0; |
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| 43 | |
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| 44 | return (int) ceil (x) % 2 == 0 ? ceil (x) : floor (x); |
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| 45 | } |
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| 46 | else |
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| 47 | return x >= 0 ? floor (x + 0.5) : ceil (x - 0.5); |
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| 48 | } |
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| 49 | #endif |
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