On Tue, Aug 09, 2011 at 09:37:58AM +0200, Denys Vlasenko wrote:
> #define isalnum(a) bb_ascii_isalnum(a)
> static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
> {
> unsigned char b = a - '0';
> if (b <= 9)
> return (b <= 9);
> b = (a|0x20) - 'a';
> return b <= 'z' - 'a';
> }
I'm scared to ask why this is written in such an obfuscated way rather
than just
return a-'0'<10U || (a|32)-'a'<26U;
Rich
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