Re: Resend [PATCH] Make KOBJ_NAME_LEN match BUS_ID_SIZE

[Rogier Wolff <R.E.Wolff@BitWizard.nl>]

On Sat, May 24, 2003 at 08:52:53PM -0700, Linus Torvalds wrote:
> How about just adding a sane
> 
> 	int copy_string(char *dest, const char *src, int len)
> 	{
> 		int size;
> 
> 		if (!len)
> 			return 0;
> 		size = strlen(src);
> 		if (size >= len)
> 			size = len-1;
> 		memcpy(dest, src, size);
> 		dest[size] = '\0';
> 		return size;
> 	}

Just catching up... 

Most people will think: "But that's not efficient!" he first
determines the size using strlen, and only then does he start a
memcpy.

In fact most modern processors priming the cache and then doing the
copy is noticably faster or just a teeny little bit slower.

			Roger. 

-- 
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