| … | |
… | |
| 6 | |
6 | |
| 7 | #define PP_CONCAT_(a, b) a ## b |
7 | #define PP_CONCAT_(a, b) a ## b |
| 8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
8 | #define PP_CONCAT(a, b) PP_CONCAT_(a, b) |
| 9 | #define PP_STRINGIFY_(a) #a |
9 | #define PP_STRINGIFY_(a) #a |
| 10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
10 | #define PP_STRINGIFY(a) PP_STRINGIFY_(a) |
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11 | |
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12 | // actually, some gcc-3.x versions work, too |
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13 | #define HAVE_GCC_BUILTINS (__GNUC__ >= 4) |
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14 | #define HAVE_GCC_BUILTINS 0 |
| 11 | |
15 | |
| 12 | extern class byteorder { |
16 | extern class byteorder { |
| 13 | static unsigned int e; // at least 32 bits |
17 | static unsigned int e; // at least 32 bits |
| 14 | public: |
18 | public: |
| 15 | byteorder (); |
19 | byteorder (); |
| … | |
… | |
| 28 | |
32 | |
| 29 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
33 | template<typename T, typename U, typename V> static inline T clamp (T v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; } |
| 30 | template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = v < (T)a ? a : v >(T)b ? b : v; } |
34 | template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) { v = v < (T)a ? a : v >(T)b ? b : v; } |
| 31 | |
35 | |
| 32 | template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; } |
36 | 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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37 | |
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38 | // linear interpolation |
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39 | template<typename T, typename U, typename P> |
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40 | static inline |
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41 | T lerp (T a, U b, P p) |
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42 | { |
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43 | return (int(a) * int(p) + int(b) * int(100 - p)) / 100; |
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44 | } |
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45 | |
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46 | // some bit functions, xft fuck me plenty |
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47 | #if HAVE_GCC_BUILTINS |
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48 | static inline int ctz (unsigned int x) { return __builtin_ctz (x); } |
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49 | static inline int popcount (unsigned int x) { return __builtin_popcount (x); } |
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50 | #else |
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51 | // count trailing zero bits and count # of one bits |
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52 | int ctz (unsigned int x); |
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53 | int popcount (unsigned int x); |
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54 | #endif |
| 33 | |
55 | |
| 34 | // in range including end |
56 | // in range including end |
| 35 | #define IN_RANGE_INC(val,beg,end) \ |
57 | #define IN_RANGE_INC(val,beg,end) \ |
| 36 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
58 | ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg)) |
| 37 | |
59 | |
