Bitfield manipulation in C

by

Bitfields are not quite as portable as you think, as “C gives no guarantee of the ordering of fields within machine words” (The C book)

Ignoring that, used correctly, either method is safe. Both methods also allow symbolic access to integral variables. You can argue that the bitfield method is easier to write, but it also means more code to review.

More Related Contents:

  1. Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
  2. Arithmetic bit-shift on a signed integer
  3. Are the shift operators () arithmetic or logical in C?
  4. What is Bit Masking?
  5. Rounding up to next power of 2
  6. Catch and compute overflow during multiplication of two large integers
  7. Find most significant bit (left-most) that is set in a bit array
  8. Fast computing of log2 for 64-bit integers
  9. Extracting bits with a single multiplication
  10. SIMD signed with unsigned multiplication for 64-bit * 64-bit to 128-bit
  11. Bitwise operators and “endianness”
  12. Explain this snippet which finds the maximum of two integers without using if-else or any other comparison operator?
  13. Casting float to int (bitwise) in C
  14. Compute fast log base 2 ceiling
  15. Finding consecutive bit string of 1 or 0
  16. Bitshift and integer promotion?
  17. Bit twiddling: which bit is set?
  18. Encoding int value as an IEEE-754 float (binary32)
  19. C reverse bits in unsigned integer
  20. How to define and work with an array of bits in C?
  21. Implementing Logical Right Shift in C
  22. How do I get bit-by-bit data from an integer value in C?
  23. Algorithm to generate bit mask
  24. How does this bitwise operation check for a power of 2?
  25. Check if a number is non zero using bitwise operators in C
  26. Decimal to Binary
  27. Bitwise shifting array of char’s
  28. How to implement Bitcount using only Bitwise operators?
  29. Order of fields when using a bit field in C
  30. What is bit masking?

Leave a Comment