Re: [PATCH] strings: helper for maximum decimal encoding of anunsigned integer

[Jan Engelhardt]

On Friday 2012-09-14 11:17, Bernd Petrovitsch wrote:
>Shouldn't that have been
>----  snip ----
>#define base10len(i) ((const int[]){1,3,5,8,10,13,15,17,20}[sizeof(i)])
>----  snip ----
Yeah.

>A pure K&R-C version would use a string:
>#define base10len(i) "\0x1\0x3\0x5\0x8\0x0A\0x0D\0x0F\0x11\0x14"[sizeof(i)]
>(if I converted them properly into hexadecimal)
The syntax is \x01\x03\x05...

>and that gives a "char"
>which is happily promoted to whatever one needs in that place.

So just convert it; there are no less than two ways to do so
 ((const unsigned char *)"\x01\x03...")[sizeof(i)]
 (boatfloating_t)("\x01\x03..."[sizeof(i)])
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/