bit field

Thân thiện

A programmer sets a bit field to control device permissions.

Definition

1. Noun:
   • A data structure or storage unit: A "bit field" is a sequence of adjacent bits within a larger binary word, typically used to store multiple Boolean values or small integer values efficiently in computer memory.
   • A field containing only binary characters: In computing, it refers to a specific area of data composed exclusively of binary digits (bits, 0s and 1s).

Usage Examples

• Noun:
  • The program uses a 16-bit integer where the first four bits are a bit field representing user permissions.
  • To save memory, the developer packed several configuration flags into a single bit field.

Advanced Usage

• "to define a bit field": To declare a specific sequence of bits within a larger data type (like a struct in C/C++) for a particular purpose.
  • You can define a bit field in a C structure to control hardware registers.
• "to manipulate a bit field": To set, clear, or check the values of individual bits within the field using bitwise operations.
  • The algorithm manipulates the bit field to encode different states.

Variants and Related Words

• Bitmask (n): A value used with bitwise operations to test, set, or clear specific bits within a bit field or other binary number.
  • A bitmask is often applied to a bit field to isolate a particular flag.
• Flag (n): Often stored within a bit field, a flag is a single bit used to represent a Boolean condition (true/false, on/off).
  • Each flag in the status register occupies one bit of the bit field.

Synonyms

• Bit array: A data structure that compactly stores bits.
• Packed field: A field where data is stored in a compressed format, often using bits.

Related Phrases and Concepts

• "Bit field extraction": The process of isolating a specific subset of bits from a larger binary value.
  • Bit field extraction is necessary to read the error code from the packet header.
• "Bit field assignment": The act of storing a value into a specific bit field.
  • The driver performs a bit field assignment to enable the interrupt.

Related Idioms/Technical Jargon

• "To pack data into a bit field": To efficiently store multiple pieces of information by assigning them to specific bits within a single storage unit.
  • The protocol packs the priority and type information into a 3-bit bit field.
• "A bit field of length N": Specifies the number of consecutive bits that constitute the field.
  • The color attribute is stored in a bit field of length 4, allowing for 16 possible colors.

Học thuật

Noun

1. a field containing only binary characters