diff options
Diffstat (limited to 'include/osmocom/core/bits.h')
| -rw-r--r-- | include/osmocom/core/bits.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/osmocom/core/bits.h b/include/osmocom/core/bits.h index ab4cf773..b541b9ce 100644 --- a/include/osmocom/core/bits.h +++ b/include/osmocom/core/bits.h @@ -46,6 +46,33 @@ int osmo_pbit2ubit_ext(ubit_t *out, unsigned int out_ofs, const pbit_t *in, unsigned int in_ofs, unsigned int num_bits, int lsb_mode); + +/* BIT REVERSAL */ + +/*! \brief bit-reversal mode for osmo_bit_reversal() */ +enum osmo_br_mode { + /*! \brief reverse all bits in a 32bit dword */ + OSMO_BR_BITS_IN_DWORD = 31, + /*! \brief reverse byte order in a 32bit dword */ + OSMO_BR_BYTES_IN_DWORD = 24, + /*! \brief reverse bits of each byte in a 32bit dword */ + OSMO_BR_BITS_IN_BYTE = 7, + /*! \brief swap the two 16bit words in a 32bit dword */ + OSMO_BR_WORD_SWAP = 16, +}; + +/*! \brief generic bit reversal function */ +uint32_t osmo_bit_reversal(uint32_t x, enum osmo_br_mode k); + +/* \brief reverse the bits within each byte of a 32bit word */ +uint32_t osmo_revbytebits_32(uint32_t x); + +/* \brief reverse the bits within a byte */ +uint32_t osmo_revbytebits_8(uint8_t x); + +/* \brief reverse the bits of each byte in a given buffer */ +void osmo_revbytebits_buf(uint8_t *buf, int len); + /*! }@ */ #endif /* _OSMO_BITS_H */ |