bitroutines.h

来自「wcdma模型」· C头文件 代码 · 共 64 行

/*
 |
 | Copyright disclaimer:
 |   This software was developed at the National Institute of Standards
 |   and Technology by employees of the Federal Government in the course
 |   of their official duties. Pursuant to title 17 Section 105 of the
 |   United States Code this software is not subject to copyright
 |   protection and is in the public domain.
 |
 |   We would appreciate acknowledgement if the software is used.
 |
*/

/*
 | Project:	WCDMA simulation environment
 | Module:      Bit manipulation routines
 | Author:      Tommi Makelainen, NIST
 | Date:        January 6, 1999
 |
 | History:
 |              January 6, 1999 Tommi Makelainen
 |                      Initial version.
 |
 */

#include <stdio.h>
#include <math.h>


/* -------------------------------------------------------------------- */
/*
 * Function:	extract_bit_from_byte
 * Desc.:	Extract given single bit value from a given byte.
 *
 * Inputs:
 *   byte	input byte
 *   pos	bit position (7-0) 7 = leftmost, 0 = bit on the right
 * Returns:
 *              bit value (0 or 1)
 *
 * Note:	
 */
char extract_bit_from_byte(char byte, int pos);


/* -------------------------------------------------------------------- */
/*
 * Function:	set_bit_in_byte
 * Desc.:	Set a value of a single bit 'bit' in given
 *              position 'pos' in a byte 'byte'.
 *
 * Inputs:
 *   bit	input bit value
 *   pos	bit position to set
 * Outputs:
 *   byte	modified byte
 *
 * Note:	
 */
int set_bit_in_byte(char bit, int pos, char *byte);


/* -------------------------------------------------------------------- */