bitfuncs.c
| 1 | #include <cutils/bitfuncs.h> |
| 2 | |
| 3 | char* _bitstring(size_t size, uintmax_t value) |
| 4 | { |
| 5 | char* ret = NULL; |
| 6 | size_t i, pos; |
| 7 | |
| 8 | bool leading_zero = true; |
| 9 | for(i = 1, pos = 0; i <= size; i++) |
| 10 | { |
| 11 | byte tmp = (byte)((value & ((uintmax_t)1 << (size-i))) >> (size-i)); |
| 12 | if(tmp && leading_zero) |
| 13 | { |
| 14 | leading_zero = false; |
| 15 | ret = malloc(size-i); |
| 16 | ret[size-i-1] = '\0'; |
| 17 | } |
| 18 | if(!leading_zero) |
| 19 | ret[pos++] = tmp ? '1' : '0'; |
| 20 | } |
| 21 | return ret; |
| 22 | } |
| 23 |