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List:       busybox
Subject:    Re: [PATCH] Bionic lacks transparent LFS migrations; provide a workaround
From:       Rich Felker <dalias () libc ! org>
Date:       2015-04-29 2:56:24
Message-ID: 20150429025624.GR17573 () brightrain ! aerifal ! cx
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On Tue, Apr 28, 2015 at 09:53:26PM -0400, Matt Whitlock wrote:
> On Wednesday, 29 April 2015, at 1:26 am, Tanguy Pruvot wrote:
> > For this case i generally cast the param to the biggest possible type.
> > 
> > printf("llu", (uint64_t) val);
> 
> You probably shouldn't assume that uint64_t is the largest possible
> integer type. In particular, off_t is not guaranteed to be <= 64
> bits.
> 
> #include <inttypes.h>
> printf("%"PRIuMAX, (uintmax_t) val);
> 
> But I hate the idea of involving all the nasty large-integer
> arithmetic machinery if it's not strictly necessary.

PRIuMAX is useless. There's a standard name for this, %ju.

Rich
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