diff options
Diffstat (limited to 'src/bitfield/bitfield.h')
| -rw-r--r-- | src/bitfield/bitfield.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/bitfield/bitfield.h b/src/bitfield/bitfield.h index a080c866..b3c30f02 100644 --- a/src/bitfield/bitfield.h +++ b/src/bitfield/bitfield.h @@ -168,6 +168,22 @@ bool copy_bytes_right_aligned(const uint8_t source[], const uint16_t source_leng bool set_nibble(const uint16_t nibble_index, const uint8_t value, uint8_t* destination, const uint16_t destination_length); +/* Public: Set the bit field in the given data array to the new value. + * + * value - the value to set in the bit field. + * offset - the starting index of the bit field (beginning from 0). + * bit_count - the number of bits to set in the data. + * destination - the destination array. + * destination_length - the total length of the destination array in bytes, + * for range checking. + * + * Returns true if the bit_count is enough to fully represent the value, and + * false if it will not fit. + */ +bool set_bitfield(const uint64_t value, const uint16_t offset, + const uint16_t bit_count, uint8_t destination[], + uint16_t destination_length); + /* Private: */ uint16_t bits_to_bytes(uint32_t bits); @@ -178,6 +194,13 @@ uint16_t bits_to_bytes(uint32_t bits); */ uint64_t bitmask(const uint8_t bit_count); +/* Private: A union to assist swapping between uint64_t and a uint8_t array. + */ +typedef union { + uint64_t whole; + uint8_t bytes[sizeof(uint64_t)]; +} ArrayOrBytes; + #ifdef __cplusplus } #endif |