common.c

来自「ertfs文件系统里面既有完整ucos程序」· C语言 代码 · 共 64 行

/*********************************************************************** 
 * $Workfile:   common.c  $ 
 * $Revision: 1.1.1.1 $ 
 * $Author: meterchen $ 
 * $Date: 2003/11/10 17:00:55 $ 
 * 
 * Project:     NAND FLASH MANAGEMENT
 * 
 * Description: 
 *        
 *
 * Revision History: 
 * 
 *********************************************************************** 
 * 
 *  Copyright (c) 2003 CHENMENG
 * 
 *  All rights reserved 
 * 
 **********************************************************************/

/***************************************************************************/
#define SUCCESS 0 /* SUCCESS */
#define ERROR -1 /* ERROR */
/***************************************************************************/
char Bit$Count(unsigned char);
char Bit$CountWord(unsigned short);
void StringCopy(char *, char *, int);
int StringCmp(char *, char *, int);
/***************************************************************************
Common Subroutine
***************************************************************************/
char Bit$Count(unsigned char cdata)
{
	unsigned short bitcount=0;
	while(cdata) {
		bitcount+=(unsigned short)(cdata &0x01);
		cdata /=2;
	}
	return((char)bitcount);
}
char Bit$CountWord(unsigned short cdata)
{
	unsigned short bitcount=0;
	while(cdata) {
		bitcount+=(cdata &0x01);
		cdata /=2;
	}
	return((char)bitcount);
}
/***************************************************************************/
void StringCopy(char *stringA, char *stringB, int count)
{
	int i;
	for(i=0; i<count; i++)
		*stringA++ = *stringB++;
}
int StringCmp(char *stringA, char *stringB, int count)
{
	int i;
	for (i=0;i<count;i++)
		if (*stringA++ != *stringB++) return(ERROR);
	return(SUCCESS);
}