From: "Steve Simon" <steve@quintile.net>
To: 9fans@9fans.net
Subject: [9fans] compiler bug?
Date: Wed, 27 Nov 2013 16:03:52 +0000 [thread overview]
Message-ID: <1ebc06ba0079a91546444a93ab21bc65@quintile.net> (raw)
[-- Attachment #1: Type: text/plain, Size: 364 bytes --]
Whilst porting some code from the net I came across
the attached, rather obscure, code.
run as:
larch% 8c -D 'STATIC=static' t.c && 8l t.8 && 8.out
78780000
larch% 8c -D 'STATIC=' t.c && 8l t.8 && 8.out
0
I think it is tickling a bug in 8c, though
I may be just showing my lack of knowledge of
the C standard...
anyone any thoughts?
-Steve
[-- Attachment #2: t.c --]
[-- Type: text/plain, Size: 479 bytes --]
#include <u.h>
#include <libc.h>
static uint getdword_n(void *mem, int n)
{
STATIC uint tmp = 0;
switch (n)
{
case 3:
((uchar*)&tmp)[1] = ((uchar*)mem)[2];
case 2:
((uchar*)&tmp)[2] = ((uchar*)mem)[1];
case 1:
((uchar*)&tmp)[3] = ((uchar*)mem)[0];
default:
break;
}
return tmp;
}
void
main(void)
{
uint x;
char buf[] = "xxxx";
x = getdword_n(buf, 2);
print("%x\n", x);
}
next reply other threads:[~2013-11-27 16:03 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-27 16:03 Steve Simon [this message]
2013-11-27 16:31 ` erik quanstrom
2013-11-27 18:07 ` Skip Tavakkolian
2013-11-27 18:38 ` erik quanstrom
2013-11-27 19:24 ` Skip Tavakkolian
2013-11-27 20:34 ` Bakul Shah
2013-11-27 21:18 ` erik quanstrom
2013-11-27 21:29 ` Charles Forsyth
2013-11-27 21:35 ` erik quanstrom
2013-11-27 21:42 ` Charles Forsyth
2013-11-27 20:41 ` Steve Simon
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