下面这个函数TX_memset4是什么意思了?

最新推荐文章于 2024-01-22 20:37:04 发布

nicklgw

最新推荐文章于 2024-01-22 20:37:04 发布

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CC 4.0 BY-SA版权

文章标签： dst include

本文链接：https://blog.youkuaiyun.com/w_ww_w/article/details/7030104

#include <iostream>
using namespace std;

void TX_memset4(void *dst, unsigned int val, unsigned int len) 
{                                  
	unsigned int  __count = (len);                 
	unsigned int __nTimes = (__count + 3) / 4;    
	unsigned int *__p = (unsigned int*)dst;         
	unsigned int __val = (val);         
	
	if (len == 0) 
	{
		return;             
	}
	
	switch (__count % 4)                
	{                                  
		case 0:                        
		do                             
		{                              
					*__p++ = __val;   
			case 3: *__p++ = __val;    
			case 2: *__p++ = __val;    
			case 1: *__p++ = __val;           
		}while(--__nTimes); 
	}                                 
}

int main(int argc, char *argv[])
{
	unsigned int iArr[10];
	TX_memset4(iArr, 7, 10);
	
	return 0;
}