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core/byteorder: add uint16 from/to buffer funcs

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This commit is contained in:
Hauke Petersen 2018-06-06 13:18:48 +02:00
parent 59e18df6c8
commit f68b243dfc
1 changed files with 45 additions and 0 deletions
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45
core/include/byteorder.h
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@ -224,6 +224,31 @@ static inline uint32_t byteorder_swapl(uint32_t v);
*/
static inline uint64_t byteorder_swapll(uint64_t v);
/**
* @brief Read a little endian encoded unsigned integer from a buffer
* into host byte order encoded variable, 16-bit
*
* @note This function is agnostic to the alignment of the target
* value in the given buffer
*
* @param[in] buf position in a buffer holding the target value
*
* @return 16-bit unsigned integer in host byte order
*/
static inline uint16_t byteorder_lebuftohs(const uint8_t *buf);
/**
* @brief Write a host byte order encoded unsigned integer as little
* endian encoded value into a buffer, 16-bit
*
* @note This function is alignment agnostic and works with any given
* memory location of the buffer
*
* @param[out] buf target buffer, must be able to accept 2 bytes
* @param[in] val value written to the buffer, in host byte order
*/
static inline void byteorder_htolebufs(uint8_t *buf, uint16_t val);
/**
* @brief Convert from host byte order to network byte order, 16 bit.
* @see byteorder_htons()
@ -418,6 +443,26 @@ static inline uint64_t ntohll(uint64_t v)
return byteorder_ntohll(input);
}
static inline uint16_t byteorder_lebuftohs(const uint8_t *buf)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
return (uint16_t)((buf[0] << 8) | buf[1]);
#else
return (uint16_t)((buf[1] << 8) | buf[0]);
#endif
}
static inline void byteorder_htolebufs(uint8_t *buf, uint16_t val)
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
buf[0] = (uint8_t)(val >> 8);
buf[1] = (uint8_t)(val & 0xff);
#else
buf[0] = (uint8_t)(val & 0xff);
buf[1] = (uint8_t)(val >> 8);
#endif
}
#ifdef __cplusplus
}
#endif