Re: [PATCH] Use FIX_UTF8_MAC to enable conversion from UTF8-MAC to UTF8

On Mon, 21 Jan 2008, Linus Torvalds wrote:

First off, the common case is that the filename likely has everything in 
plain 7-bit ascii. So rather than re-encoding by default, the first thing 
to do is to just see if it even needs re-encoding. Even if it's as simple 
as saying "does it have any high bits at all", that's going to be a *huge* 
performance win.

So start off with something like

	int is_usascii(const char *p)
	{
		char c;

		do {
			c = *p++;
		} while (c > 0);
		return !c;
	}

You need to use "signed char" here.  On ARM a char is unsigned by 
default.  That's the case on some other systems too.


Nicolas