mirror of
https://github.com/DarkFlippers/unleashed-firmware
synced 2024-11-23 13:03:13 +00:00
d92b0a82cc
"A long time ago in a galaxy far, far away...." we started NFC subsystem refactoring. Starring: - @gornekich - NFC refactoring project lead, architect, senior developer - @gsurkov - architect, senior developer - @RebornedBrain - senior developer Supporting roles: - @skotopes, @DrZlo13, @hedger - general architecture advisors, code review - @Astrrra, @doomwastaken, @Hellitron, @ImagineVagon333 - quality assurance Special thanks: @bettse, @pcunning, @nxv, @noproto, @AloneLiberty and everyone else who has been helping us all this time and contributing valuable knowledges, ideas and source code.
325 lines
11 KiB
C
325 lines
11 KiB
C
#pragma once
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
#include <stdbool.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
typedef struct BitBuffer BitBuffer;
|
|
|
|
// Construction, deletion, reset
|
|
|
|
/**
|
|
* Allocate a BitBuffer instance.
|
|
*
|
|
* @param [in] capacity_bytes maximum buffer capacity, in bytes
|
|
* @return pointer to the allocated BitBuffer instance
|
|
*/
|
|
BitBuffer* bit_buffer_alloc(size_t capacity_bytes);
|
|
|
|
/**
|
|
* Delete a BitBuffer instance.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance
|
|
*/
|
|
void bit_buffer_free(BitBuffer* buf);
|
|
|
|
/**
|
|
* Clear all data from a BitBuffer instance.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance
|
|
*/
|
|
void bit_buffer_reset(BitBuffer* buf);
|
|
|
|
// Copy and write
|
|
|
|
/**
|
|
* Copy another BitBuffer instance's contents to this one, replacing
|
|
* all of the original data.
|
|
* The destination capacity must be no less than the source data size.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to copy into
|
|
* @param [in] other pointer to a BitBuffer instance to copy from
|
|
* @note
|
|
*/
|
|
void bit_buffer_copy(BitBuffer* buf, const BitBuffer* other);
|
|
|
|
/**
|
|
* Copy all BitBuffer instance's contents to this one, starting from start_index,
|
|
* replacing all of the original data.
|
|
* The destination capacity must be no less than the source data size
|
|
* counting from start_index.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to copy into
|
|
* @param [in] other pointer to a BitBuffer instance to copy from
|
|
* @param [in] start_index index to begin copying source data from
|
|
*/
|
|
void bit_buffer_copy_right(BitBuffer* buf, const BitBuffer* other, size_t start_index);
|
|
|
|
/**
|
|
* Copy all BitBuffer instance's contents to this one, ending with end_index,
|
|
* replacing all of the original data.
|
|
* The destination capacity must be no less than the source data size
|
|
* counting to end_index.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to copy into
|
|
* @param [in] other pointer to a BitBuffer instance to copy from
|
|
* @param [in] end_index index to end copying source data at
|
|
*/
|
|
void bit_buffer_copy_left(BitBuffer* buf, const BitBuffer* other, size_t end_index);
|
|
|
|
/**
|
|
* Copy a byte array to a BitBuffer instance, replacing all of the original data.
|
|
* The destination capacity must be no less than the source data size.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to copy into
|
|
* @param [in] data pointer to the byte array to be copied
|
|
* @param [in] size_bytes size of the data to be copied, in bytes
|
|
*/
|
|
void bit_buffer_copy_bytes(BitBuffer* buf, const uint8_t* data, size_t size_bytes);
|
|
|
|
/**
|
|
* Copy a byte array to a BitBuffer instance, replacing all of the original data.
|
|
* The destination capacity must be no less than the source data size.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to copy into
|
|
* @param [in] data pointer to the byte array to be copied
|
|
* @param [in] size_bits size of the data to be copied, in bits
|
|
*/
|
|
void bit_buffer_copy_bits(BitBuffer* buf, const uint8_t* data, size_t size_bits);
|
|
|
|
/**
|
|
* Copy a byte with parity array to a BitBuffer instance, replacing all of the original data.
|
|
* The destination capacity must be no less than the source data size.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to copy into
|
|
* @param [in] data pointer to the byte array to be copied
|
|
* @param [in] size_bitss size of the data to be copied, in bits
|
|
*/
|
|
void bit_buffer_copy_bytes_with_parity(BitBuffer* buf, const uint8_t* data, size_t size_bits);
|
|
|
|
/**
|
|
* Write a BitBuffer instance's entire contents to an arbitrary memory location.
|
|
* The destination memory must be allocated. Additionally, the destination
|
|
* capacity must be no less than the source data size.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to write from
|
|
* @param [out] dest pointer to the destination memory location
|
|
* @param [in] size_bytes maximum destination data size, in bytes
|
|
*/
|
|
void bit_buffer_write_bytes(const BitBuffer* buf, void* dest, size_t size_bytes);
|
|
|
|
/**
|
|
* Write a BitBuffer instance's entire contents to an arbitrary memory location.
|
|
* Additionally, place a parity bit after each byte.
|
|
* The destination memory must be allocated. Additionally, the destination
|
|
* capacity must be no less than the source data size plus parity.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to write from
|
|
* @param [out] dest pointer to the destination memory location
|
|
* @param [in] size_bytes maximum destination data size, in bytes
|
|
* @param [out] bits_written actual number of bits writen, in bits
|
|
*/
|
|
void bit_buffer_write_bytes_with_parity(
|
|
const BitBuffer* buf,
|
|
void* dest,
|
|
size_t size_bytes,
|
|
size_t* bits_written);
|
|
|
|
/**
|
|
* Write a slice of BitBuffer instance's contents to an arbitrary memory location.
|
|
* The destination memory must be allocated. Additionally, the destination
|
|
* capacity must be no less than the requested slice size.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to write from
|
|
* @param [out] dest pointer to the destination memory location
|
|
* @param [in] start_index index to begin copying source data from
|
|
* @param [in] size_bytes data slice size, in bytes
|
|
*/
|
|
void bit_buffer_write_bytes_mid(
|
|
const BitBuffer* buf,
|
|
void* dest,
|
|
size_t start_index,
|
|
size_t size_bytes);
|
|
|
|
// Checks
|
|
|
|
/**
|
|
* Check whether a BitBuffer instance contains a partial byte (i.e. the bit count
|
|
* is not divisible by 8).
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be checked
|
|
* @return true if the instance contains a partial byte, false otherwise
|
|
*/
|
|
bool bit_buffer_has_partial_byte(const BitBuffer* buf);
|
|
|
|
/**
|
|
* Check whether a BitBuffer instance's contents start with the designated byte.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be checked
|
|
* @param [in] byte byte value to be checked against
|
|
* @return true if data starts with designated byte, false otherwise
|
|
*/
|
|
bool bit_buffer_starts_with_byte(const BitBuffer* buf, uint8_t byte);
|
|
|
|
// Getters
|
|
|
|
/**
|
|
* Get a BitBuffer instance's capacity (i.e. the maximum possible amount of data), in bytes.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be queried
|
|
* @return capacity, in bytes
|
|
*/
|
|
size_t bit_buffer_get_capacity_bytes(const BitBuffer* buf);
|
|
|
|
/**
|
|
* Get a BitBuffer instance's data size (i.e. the amount of stored data), in bits.
|
|
* Might be not divisible by 8 (see bit_buffer_is_partial_byte).
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be queried
|
|
* @return data size, in bits.
|
|
*/
|
|
size_t bit_buffer_get_size(const BitBuffer* buf);
|
|
|
|
/**
|
|
* Get a BitBuffer instance's data size (i.e. the amount of stored data), in bytes.
|
|
* If a partial byte is present, it is also counted.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be queried
|
|
* @return data size, in bytes.
|
|
*/
|
|
size_t bit_buffer_get_size_bytes(const BitBuffer* buf);
|
|
|
|
/**
|
|
* Get a byte value at a specified index in a BitBuffer instance.
|
|
* The index must be valid (i.e. less than the instance's data size in bytes).
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be queried
|
|
* @param [in] index index of the byte in question
|
|
*/
|
|
uint8_t bit_buffer_get_byte(const BitBuffer* buf, size_t index);
|
|
|
|
/**
|
|
* Get a byte value starting from the specified bit index in a BitBuffer instance.
|
|
* The resulting byte might correspond to a single byte (if the index is a multiple
|
|
* of 8), or two overlapping bytes combined.
|
|
* The index must be valid (i.e. less than the instance's data size in bits).
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be queried
|
|
* @param [in] index bit index of the byte in question
|
|
*/
|
|
uint8_t bit_buffer_get_byte_from_bit(const BitBuffer* buf, size_t index_bits);
|
|
|
|
/**
|
|
* Get the pointer to a BitBuffer instance's underlying data.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be queried
|
|
* @return pointer to the underlying data
|
|
*/
|
|
const uint8_t* bit_buffer_get_data(const BitBuffer* buf);
|
|
|
|
/**
|
|
* Get the pointer to a BitBuffer instance's underlying data.
|
|
*
|
|
* @param [in] buf pointer to a BitBuffer instance to be queried
|
|
* @return pointer to the underlying data
|
|
*/
|
|
const uint8_t* bit_buffer_get_parity(const BitBuffer* buf);
|
|
|
|
// Setters
|
|
|
|
/**
|
|
* Set byte value at a specified index in a BitBuffer instance.
|
|
* The index must be valid (i.e. less than the instance's data size in bytes).
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be modified
|
|
* @param [in] index index of the byte in question
|
|
* @param [in] byte byte value to be set at index
|
|
*/
|
|
void bit_buffer_set_byte(BitBuffer* buf, size_t index, uint8_t byte);
|
|
|
|
/**
|
|
* Set byte and parity bit value at a specified index in a BitBuffer instance.
|
|
* The index must be valid (i.e. less than the instance's data size in bytes).
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be modified
|
|
* @param [in] index index of the byte in question
|
|
* @param [in] byte byte value to be set at index
|
|
* @param [in] parity parity bit value to be set at index
|
|
*/
|
|
void bit_buffer_set_byte_with_parity(BitBuffer* buff, size_t index, uint8_t byte, bool parity);
|
|
|
|
/**
|
|
* Resize a BitBuffer instance to a new size, in bits.
|
|
* @warning May cause bugs. Use only if absolutely necessary.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be resized
|
|
* @param [in] new_size the new size of the buffer, in bits
|
|
*/
|
|
void bit_buffer_set_size(BitBuffer* buf, size_t new_size);
|
|
|
|
/**
|
|
* Resize a BitBuffer instance to a new size, in bytes.
|
|
* @warning May cause bugs. Use only if absolutely necessary.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be resized
|
|
* @param [in] new_size_bytes the new size of the buffer, in bytes
|
|
*/
|
|
void bit_buffer_set_size_bytes(BitBuffer* buf, size_t new_size_bytes);
|
|
|
|
// Modification
|
|
|
|
/**
|
|
* Append all BitBuffer's instance contents to this one. The destination capacity
|
|
* must be no less than its original data size plus source data size.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be appended to
|
|
* @param [in] other pointer to a BitBuffer instance to be appended
|
|
*/
|
|
void bit_buffer_append(BitBuffer* buf, const BitBuffer* other);
|
|
|
|
/**
|
|
* Append a BitBuffer's instance contents to this one, starting from start_index.
|
|
* The destination capacity must be no less than the source data size
|
|
* counting from start_index.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be appended to
|
|
* @param [in] other pointer to a BitBuffer instance to be appended
|
|
* @param [in] start_index index to begin copying source data from
|
|
*/
|
|
void bit_buffer_append_right(BitBuffer* buf, const BitBuffer* other, size_t start_index);
|
|
|
|
/**
|
|
* Append a byte to a BitBuffer instance.
|
|
* The destination capacity must be no less its original data size plus one.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be appended to
|
|
* @param [in] byte byte value to be appended
|
|
*/
|
|
void bit_buffer_append_byte(BitBuffer* buf, uint8_t byte);
|
|
|
|
/**
|
|
* Append a byte array to a BitBuffer instance.
|
|
* The destination capacity must be no less its original data size plus source data size.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be appended to
|
|
* @param [in] data pointer to the byte array to be appended
|
|
* @param [in] size_bytes size of the data to be appended, in bytes
|
|
*/
|
|
void bit_buffer_append_bytes(BitBuffer* buf, const uint8_t* data, size_t size_bytes);
|
|
|
|
/**
|
|
* Append a bit to a BitBuffer instance.
|
|
* The destination capacity must be sufficient to accomodate the additional bit.
|
|
*
|
|
* @param [in,out] buf pointer to a BitBuffer instance to be appended to
|
|
* @param [in] bit bit value to be appended
|
|
*/
|
|
void bit_buffer_append_bit(BitBuffer* buf, bool bit);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|