Variable-length bit buffer for building compressed output. More...

#include "ccsds124.h"
#include <string.h>

Functions
Initialization Functions
This module provides a dynamically-growing bit buffer for constructing compressed output streams. Bits are appended sequentially using MSB-first ordering as required by CCSDS 124.0-B-1. Bit Ordering Bits are appended MSB-first within each byte: First bit appended goes to bit position 7 Second bit goes to position 6, etc. Authors Georges Labrèche georg.nosp@m.es@t.nosp@m.anagr.nosp@m.aspa.nosp@m.ce.co.nosp@m.m — https://georges.fyi Claude Code (Anthropic) norep.nosp@m.ly@a.nosp@m.nthro.nosp@m.pic..nosp@m.com See also https://ccsds.org/Pubs/124x0b1.pdf CCSDS 124.0-B-1 Standard
void	bitbuffer_init (bitbuffer_t *bb)
	Initialize bit buffer to empty state.

void	bitbuffer_clear (bitbuffer_t *bb)
	Clear bit buffer contents.

Bit Appending Functions
static void	bitbuffer_flush_acc (bitbuffer_t *bb)
	Flush accumulator to data buffer when it has 8+ bits.

int	bitbuffer_append_bit (bitbuffer_t *bb, int bit)
	Append a single bit to buffer.

int	bitbuffer_append_bits (bitbuffer_t bb, const uint8_t data, size_t num_bits)
	Append multiple bits from byte array.

int	bitbuffer_append_value (bitbuffer_t *bb, uint32_t value, size_t num_bits)
	Append multiple bits from a value in a single operation.

int	bitbuffer_append_bitvector (bitbuffer_t bb, const bitvector_t bv)
	Append all bits from a bit vector.

Query Functions
size_t	bitbuffer_size (const bitbuffer_t *bb)
	Get number of bits in buffer.

Byte Conversion Functions
size_t	bitbuffer_to_bytes (const bitbuffer_t bb, uint8_t data, size_t max_bytes)
	Convert bit buffer to byte array.

Detailed Description

Variable-length bit buffer for building compressed output.

Definition in file bitbuffer.c.

Function Documentation

◆ bitbuffer_flush_acc()

static void bitbuffer_flush_acc ( bitbuffer_t * bb )

static

Flush accumulator to data buffer when it has 8+ bits.

Parameters

[in,out] bb Bit buffer

Definition at line 66 of file bitbuffer.c.

References bitbuffer::acc, bitbuffer::acc_len, bitbuffer::data, and bitbuffer::num_bits.

Referenced by bitbuffer_append_bit(), and bitbuffer_append_value().

Functions

Detailed Description

Function Documentation

◆ bitbuffer_flush_acc()