On Jun 19 11:09, Carl Fredrik Forsberg wrote:
> Hello again.
> I have performed a few more tests with the program below.
https://cygwin.com/ml/cygwin/2017-06/msg00032.html
Please check again with the latest developer snapshots from
https://cygwin.com/snapshots/
Thanks,
Corinna
--
Corinna Vins
Hello again.
I have performed a few more tests with the program below.
The lrint() family of functions I tested all appear tohave problems with
negative numbers. There seem to be an unsigned vs. signed integer problems.
I could not find cygwin/math/lrint.c on my Cygwin installation where patche
On May 24 07:33, Eric Blake wrote:
> On 05/24/2017 07:00 AM, Carl Fredrik Forsberg wrote:
> > type cast lrint(-1.0) = 4294967295
>
> Now that's an interesting one - it may be that cygwin1.dll actually has
> buggy behavior in lrint(). In the source code, cygwin/math/lrint.c is
> dropping down to a
On Wed, May 24, 2017 at 6:57 PM, Eric Blake wrote:
> On 05/24/2017 11:53 AM, Erik Bray wrote:
>
dropping down to assembly; it could very well be that the assembly code
is incorrectly truncating things at 32 bits (where it is just fine for
32-bit Cygwin, but wrong for 64-bit):
>>
On Thu, 25 May 2017 18:43:58, Steven Penny wrote:
Uh, have you actually tried this? It doesnt do anything:
$ cat alfa.c
#define __USE_MINGW_ANSI_STDIO 1
#include
int main() {
printf("%zi %zu %llu\n", __SIZE_MAX__, __SIZE_MAX__, __SIZE_MAX__);
}
$ x86_64-w64-mingw3
On Thu, 25 May 2017 13:17:30, Eric Blake wrote:
Correct. Newer gcc's -Wformat-signedness will flag the discrepency.
Uh, have you actually tried this? It doesnt do anything:
$ cat alfa.c
#define __USE_MINGW_ANSI_STDIO 1
#include
int main() {
printf("%zi %zu %llu\n", __SIZE_MA
On 05/24/2017 06:36 PM, Steven Penny wrote:
> On Wed, 24 May 2017 07:33:27, Eric Blake wrote:
>> Buggy. size_t should be printed with %zi, not %i (since size_t and int
>> are not necessarily the same type).
>
> Aren’t both wrong? By definition %i is a signed integer, and size_t is
> unsigned.
> S
On 2017-05-24 19:31, Steven Penny wrote:
> On Wed, 24 May 2017 16:36:03, Steven Penny wrote:
>> Aren’t both wrong? By definition %i is a signed integer, and size_t is
>> unsigned.
>> So %zu or %llu would be more correct:
>> http://wikipedia.org/wiki/C_data_types
>> They all seem to do the job thoug
On Wed, 24 May 2017 16:36:03, Steven Penny wrote:
Aren’t both wrong? By definition %i is a signed integer, and size_t is unsigned.
So %zu or %llu would be more correct:
http://wikipedia.org/wiki/C_data_types
They all seem to do the job though:
Correcting myself. Here is why you cannot use %zi
On Wed, 24 May 2017 07:33:27, Eric Blake wrote:
Buggy. size_t should be printed with %zi, not %i (since size_t and int
are not necessarily the same type).
Aren’t both wrong? By definition %i is a signed integer, and size_t is unsigned.
So %zu or %llu would be more correct:
http://wikipedia.or
int(-1.0) = 4294967295
lrint(1.0) = 1
llrint(1.0) = 1
Via sprintf: int -1 = -1
size of long long int: 8
size of long int: 8
size of int: 4
-Original Message-
From: cygwin-ow...@cygwin.com [mailto:cygwin-ow...@cygwin.com] On Behalf Of
Eric Blake
Sent: 24 May 2017 18:57
To: cygwin@cygwin.co
On 05/24/2017 11:53 AM, Erik Bray wrote:
>>> dropping down to assembly; it could very well be that the assembly code
>>> is incorrectly truncating things at 32 bits (where it is just fine for
>>> 32-bit Cygwin, but wrong for 64-bit):
>>>
>>> long lrint (double x)
>>> {
>>> long retval = 0L;
>>>
On Wed, May 24, 2017 at 5:55 PM, Erik Bray wrote:
> On Wed, May 24, 2017 at 2:33 PM, Eric Blake wrote:
>> On 05/24/2017 07:00 AM, Carl Fredrik Forsberg wrote:
>>> I am experiencing problems printing long int values under cygwin64
>>> installed on a Windows 10 machine.
>>>
>>> Below is a test prog
On Wed, May 24, 2017 at 2:33 PM, Eric Blake wrote:
> On 05/24/2017 07:00 AM, Carl Fredrik Forsberg wrote:
>> I am experiencing problems printing long int values under cygwin64 installed
>> on a Windows 10 machine.
>>
>> Below is a test program followed by its output to demonstrate the problem.
>>
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