diff options
Diffstat (limited to 'CAN-binder/libs/bitfield-c/src/bitfield/bitfield.c')
-rw-r--r-- | CAN-binder/libs/bitfield-c/src/bitfield/bitfield.c | 74 |
1 files changed, 0 insertions, 74 deletions
diff --git a/CAN-binder/libs/bitfield-c/src/bitfield/bitfield.c b/CAN-binder/libs/bitfield-c/src/bitfield/bitfield.c deleted file mode 100644 index 795f020..0000000 --- a/CAN-binder/libs/bitfield-c/src/bitfield/bitfield.c +++ /dev/null @@ -1,74 +0,0 @@ -#include <bitfield/bitfield.h> -#include <limits.h> -#include <string.h> -#include <stddef.h> -#include <sys/param.h> - -uint64_t bitmask(const uint8_t bit_count) { - return (((uint64_t)0x1) << bit_count) - 1; -} - -uint8_t get_nibble(const uint8_t source[], const uint8_t source_length, - const uint8_t nibble_index) { - uint8_t byte_index = nibble_index / 2; - uint8_t result = get_byte(source, source_length, byte_index); - if(nibble_index % 2 == 0) { - result >>= NIBBLE_SIZE; - } - result &= bitmask(NIBBLE_SIZE); - return result; -} - -uint8_t get_byte(const uint8_t source[], const uint8_t source_length, - const uint8_t byte_index) { - if(byte_index < source_length) { - return source[byte_index]; - } - return 0; -} - -uint64_t get_bitfield(const uint8_t source[], const uint8_t source_length, - const uint16_t offset, const uint16_t bit_count) { - if(bit_count > 64 || bit_count < 1) { - // TODO error reporting? - return 0; - } - - ArrayOrBytes combined; - memset(combined.bytes, 0, sizeof(combined.bytes)); - if(copy_bits_right_aligned(source, source_length, offset, bit_count, - combined.bytes, sizeof(combined.bytes))) { - if(BYTE_ORDER == LITTLE_ENDIAN) { - combined.whole = __builtin_bswap64(combined.whole); - } - } else { - // debug("couldn't copy enough bits from source") - } - return combined.whole; -} - -bool set_nibble(const uint16_t nibble_index, const uint8_t value, - uint8_t* destination, const uint16_t destination_length) { - return copy_bits(&value, CHAR_BIT, NIBBLE_SIZE, NIBBLE_SIZE, destination, - destination_length, nibble_index * NIBBLE_SIZE); -} - -bool set_bitfield(const uint64_t value, const uint16_t offset, - const uint16_t bit_count, uint8_t destination[], - uint16_t destination_length) { - if(value > bitmask(bit_count)) { - return false; - } - - ArrayOrBytes combined = { - whole: value - }; - - if(BYTE_ORDER == LITTLE_ENDIAN) { - combined.whole = __builtin_bswap64(combined.whole); - } - - return copy_bits(combined.bytes, sizeof(combined.bytes), - sizeof(combined.bytes) * CHAR_BIT - bit_count, bit_count, - destination, destination_length, offset); -} |