| Harald Welte | 2230c13 | 2011-01-19 10:10:16 +0100 | [diff] [blame^] | 1 | #ifndef _OSMO_BITS_H |
| 2 | #define _OSMO_BITS_H |
| 3 | |
| 4 | #include <stdint.h> |
| 5 | |
| 6 | typedef uint8_t sbit_t; /* soft bit (-127...127) */ |
| 7 | typedef uint8_t ubit_t; /* unpacked bit (0 or 1) */ |
| 8 | typedef uint8_t pbit_t; /* packed bis (8 bits in a byte) */ |
| 9 | |
| 10 | /* determine how many bytes we would need for 'num_bits' packed bits */ |
| 11 | static inline unsigned int osmo_pbit_bytesize(unsigned int num_bits) |
| 12 | { |
| 13 | unsigned int pbit_bytesize = num_bits / 8; |
| 14 | |
| 15 | if (num_bits % 8) |
| 16 | pbit_bytesize++; |
| 17 | |
| 18 | return pbit_bytesize; |
| 19 | } |
| 20 | |
| 21 | /* convert unpacked bits to packed bits, return length in bytes */ |
| 22 | int osmo_ubit2pbit(pbit_t *out, const ubit_t *in, unsigned int num_bits); |
| 23 | |
| 24 | /* convert packed bits to unpacked bits, return length in bytes */ |
| 25 | int osmo_pbit2ubit(ubit_t *out, const pbit_t *in, unsigned int num_bits); |
| 26 | |
| 27 | #endif |