diff options
| author | Harald Welte <laforge@gnumonks.org> | 2011-01-19 10:10:16 +0100 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2011-01-19 10:10:16 +0100 |
| commit | 2230c133a69e8f9660051aff61626996deba4ed8 (patch) | |
| tree | 9475e8a923355e5741ecebf5c8180005ca8b0d63 /include | |
| parent | c035ec63f509573408069340b4d40a906a40b8f7 (diff) | |
[BITS] introduce new packed/unpacked bit conversion routines
Diffstat (limited to 'include')
| -rw-r--r-- | include/osmocore/Makefile.am | 2 | ||||
| -rw-r--r-- | include/osmocore/bits.h | 27 |
2 files changed, 28 insertions, 1 deletions
diff --git a/include/osmocore/Makefile.am b/include/osmocore/Makefile.am index 2efaa96b..a3b12ef4 100644 --- a/include/osmocore/Makefile.am +++ b/include/osmocore/Makefile.am @@ -1,4 +1,4 @@ -osmocore_HEADERS = signal.h linuxlist.h timer.h select.h msgb.h \ +osmocore_HEADERS = signal.h linuxlist.h timer.h select.h msgb.h bits.h \ tlv.h bitvec.h comp128.h statistics.h gsm_utils.h utils.h \ gsmtap.h write_queue.h rsl.h gsm48.h rxlev_stat.h mncc.h \ gsm48_ie.h logging.h gsm0808.h rate_ctr.h gsmtap_util.h \ diff --git a/include/osmocore/bits.h b/include/osmocore/bits.h new file mode 100644 index 00000000..662c4a9d --- /dev/null +++ b/include/osmocore/bits.h @@ -0,0 +1,27 @@ +#ifndef _OSMO_BITS_H +#define _OSMO_BITS_H + +#include <stdint.h> + +typedef uint8_t sbit_t; /* soft bit (-127...127) */ +typedef uint8_t ubit_t; /* unpacked bit (0 or 1) */ +typedef uint8_t pbit_t; /* packed bis (8 bits in a byte) */ + +/* determine how many bytes we would need for 'num_bits' packed bits */ +static inline unsigned int osmo_pbit_bytesize(unsigned int num_bits) +{ + unsigned int pbit_bytesize = num_bits / 8; + + if (num_bits % 8) + pbit_bytesize++; + + return pbit_bytesize; +} + +/* convert unpacked bits to packed bits, return length in bytes */ +int osmo_ubit2pbit(pbit_t *out, const ubit_t *in, unsigned int num_bits); + +/* convert packed bits to unpacked bits, return length in bytes */ +int osmo_pbit2ubit(ubit_t *out, const pbit_t *in, unsigned int num_bits); + +#endif |