[PATCH 2/3] Add left circular shift function

--- include/osmocom/core/bits.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/osmocom/core/bits.h b/include/osmocom/core/bits.h index b1f4ed6..98a42f9 100644 --- a/include/osmocom/core/bits.h +++ b/include/osmocom/core/bits.h @@ -76,6 +76,15 @@ 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); +/*! \brief left circular shift + * \param[in] in The 16 bit unsigned integer to be rotated + * \param[in] shift Number of bits to shift \a in to + */ +static inline uint16_t osmo_rol16(uint16_t in, unsigned shift) +{ + return (in << shift) | (in >> (16 - shift)); +} + /*! @} */ #endif /* _OSMO_BITS_H */ -- 1.8.3.2