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Re: [Xen-devel] [RFC] xen: Add .astylerc for automated style-formatting



On 01.08.19 14:16, Viktor Mitin wrote:
On Thu, Aug 1, 2019 at 10:40 AM Jan Beulich <JBeulich@xxxxxxxx> wrote:

On 31.07.2019 18:20, Viktor Mitin wrote:
How all those projects live without this issue?

Perhaps they don't care? I do.

What is the reason not to fix 'diff -p'? Is it not possible at all?

I have no idea, but I guess there's a reason for its current
behavior.

Jan, it seems it is not a good idea to modify the Xen coding style
without investigation of the issue first. It takes some effort to
automate every such (or similar) exceptional code formatting case. So
it looks we could find a better option, than just adding one more
exception to Xen coding style, at least worth to investigate it first.

Could you please share more details about the background of the issue
and examples?

What (further) background and what kind of examples are you after?

I expected you to have some arguments why it cannot be fixed in the
diff or other tools.

Changing diff upstream might be possible. Changing today's incarnations
in all distros out in the wild is barely doable.

Another question is whether we really want diff to be changed. The
current behavior is fine for assembly sources for example. A changed
diff would no longer present the last label for context.

The examples I meant are any real patches code examples to be used for
this investigation.

A snipplet from commit 57f8b13c724023c78fa15a80452d1de3e51a1418:

@@ -4096,14 +4097,12 @@ retry_transaction:
         goto out;

     if (target == NULL) {
-        libxl__xs_printf(gc, t, target_path, "%"PRIu32,
-                         (uint32_t) info.current_memkb);
-        *target_memkb = (uint32_t) info.current_memkb;
+ libxl__xs_printf(gc, t, target_path, "%"PRIu64, info.current_memkb);
+        *target_memkb = info.current_memkb;
     }
     if (staticmax == NULL) {
-        libxl__xs_printf(gc, t, max_path, "%"PRIu32,
-                         (uint32_t) info.max_memkb);
-        *max_memkb = (uint32_t) info.max_memkb;
+        libxl__xs_printf(gc, t, max_path, "%"PRIu64, info.max_memkb);
+        *max_memkb = info.max_memkb;
     }

     rc = 0;


Juergen


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