utility.c

来自「wcdma模型」· C语言 代码 · 共 63 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.
 |
*/

#include <stdlib.h>
#include <math.h>
#include <stdio.h>
#include <ctype.h> 
#include <string.h>
#include "utility.h"


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

int IntPower( int k, int m)

{
  int ival, i;
  ival=1;
  for(i=1; i<=m;i++) ival *=k;
  return(ival);
};                


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

unsigned short int LongParity(unsigned long int long_word)
{
  unsigned short int parity,i;
  parity = 0;
  for(i=1;i<=32;i++) {
	parity=parity^(unsigned short int)(long_word%2);
	long_word/=2;
  }
  return(parity);
}                         


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

unsigned short int Parity(unsigned short int short_word)
{
  unsigned short int parity,i;
  parity = 0;
  for(i=1;i<=16;i++) {
	parity=parity^(unsigned short int)(short_word%2);
	short_word/=2;
  }
  return(parity);
}                         


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