Bits manipulation module for fast prototyping

Bits.c

#include "Bits.h"

void Bits_ByteDump(uint64_t value, uint8_t numberOfBytes) {
    int8_t i;
 
    for (i = numberOfBytes * 8 - 1; i >= 0; i--) {
        printf("%ld", (value >> i) & 1);

		if (i % 8 == 0) {
            printf(" ");
		}
    }
    printf("\n");
}

uint8_t Bits_ByteSlice(uint8_t byte, uint8_t start, uint8_t length) {
	uint8_t mask = (1 << length) - 1;
    return (byte >> (8 - start - length)) & mask;
}

uint64_t Bits_BufferSlice(const uint8_t* const buffer, uint16_t start, uint8_t length) {
	uint64_t result = 0;
	uint8_t byteIndexStart = start / 8;
	uint8_t bitIndexStart = start % 8;
	int8_t bitsToRead = length;

	while (bitsToRead > 0) {
		uint8_t currentBitsToRead = (bitsToRead < (8 - bitIndexStart)) ? bitsToRead : (8 - bitIndexStart);
		bitsToRead -= currentBitsToRead;
		result |= (Bits_ByteSlice(buffer[byteIndexStart], bitIndexStart, currentBitsToRead) << bitsToRead);
		byteIndexStart++;
		bitIndexStart = 0;
	}
	
	return result;
}

uint8_t Bits_ByteSet(uint8_t value, uint8_t position) {
    return (value | (1 << position));
}
 
uint8_t Bits_ByteClear(uint8_t value, uint8_t position) {
    return ~(1 << position) & value;
}
 
uint8_t Bits_ByteGet(uint8_t value, uint8_t position) {
    return ((1 << position) & value) >> position;
}

Bits.h

#ifndef _BITS_H_
#define _BITS_H_

/*********************************************
* @brief	Module enables easy byte manipulation
* @author	Darko Lukic <[email protected]>
* @hint		Function name pattern: Bits_[Byte|Buffer][Operation]
*
**********************************************/

#include <stdio.h>
#include <inttypes.h>


/**********************************************
* @brief	Print bits
* 
* @param	[in] value - value to print
* @param	[in] numberOfBytes - size of value in bytes
*
**********************************************/
void Bits_ByteDump(uint64_t value, uint8_t numberOfBytes);


/**********************************************
* @brief	Slice bits from byte
* @param 	[in] byte - Byte
* @param	[in] start - Index of start bit
* @param	[in] length - Number of bits to slice
*
* @return	Sliced bits
*
**********************************************/
uint8_t Bits_ByteSlice(uint8_t byte, uint8_t start, uint8_t length);


/**********************************************
* @brief	Slice bits from buffer
* @param 	[in] Buffer - Buffer
* @param	[in] start - Index of start bit
* @param	[in] length - Number of bits to slice
*
* @return	Sliced bits
*
**********************************************/
uint64_t Bits_BufferSlice(const uint8_t* const buffer, uint16_t start, uint8_t length);


uint8_t Bits_ByteSet(uint8_t value, uint8_t position);
uint8_t Bits_ByteClear(uint8_t value, uint8_t position);
uint8_t Bits_ByteGet(uint8_t value, uint8_t position);

#endif // _BITS_H_