comparison: common.h
common.h
- changeset 29
- b4e09ae24bf1
- parent 27
- 15c06a191f9b
- child 32
- d11a034aabfd
equal
deleted
inserted
replaced
| 28:fb46d3d40064 | 29:b4e09ae24bf1 |
|---|---|
| 98 } | 98 } |
| 99 | 99 |
| 100 return r; | 100 return r; |
| 101 } | 101 } |
| 102 | 102 |
| 103 template <class T> unsigned char CharByte (T a, unsigned int b) { | |
| 104 if (b >= sizeof (T)) | |
| 105 error ("CharByte: tried to get byte %u out of a %u-byte %s\n", | |
| 106 b, sizeof (T), typeid(T).name()); | |
| 107 | |
| 108 unsigned long p1 = pow<unsigned long> (256, b); | |
| 109 unsigned long p2 = pow<unsigned long> (256, b+1); | |
| 110 unsigned long r = (a % p2) / p1; | |
| 111 | |
| 112 if (r > 256) | |
| 113 error ("result %lu too big!", r); | |
| 114 | |
| 115 unsigned char ur = static_cast<unsigned char> (r); | |
| 116 return ur; | |
| 117 } | |
| 118 | |
| 119 #endif // __COMMON_H__ | 103 #endif // __COMMON_H__ |
