Hi Eugeniu,
Am 05.03.2021 um 12:52 schrieb Eugeniu Rosca:
Hello Stefan,
On Fri, Mar 05, 2021 at 07:39:04AM +0000, Stefan Herbrechtsmeier wrote:
From: Stefan Herbrechtsmeier <stefan.herbrechtsme...@weidmueller.com>
The part number sub-command returns the hexadecimal value with a leading
0x.
That's to make sure that:
- users have clear and unequivocal feedback that '10'
returned by the command is really HEX 10, not DEC 10.
- other U-Boot commands which need to take '0x10' as input
will interpret it correctly, regardless of the way these
other commands implement ascii-to-integer conversion.
'Almost all U-Boot commands expect numbers to be entered in hexadecimal
input format.' [1]
The filesystem commands use `simple_strtoul(.., 16)` and interpret the
value as hexadecimal value.
The 0x suggests that a 10 will be interpreted as decimal value and this
isn't true.
This is inconsistent with other values in the command
It could be, but it is then better to fix the inconsistency in those
commands/sub-commands which add the ambiguity.
Normally you are right but U-Boot by design use hexadecimal values
without 0x. The env_set_hex functions doesn't use 0x.
and U-Boot uses hexadecimal values generally.
The key word is "generally", but not always. Some U-Boot commands will
process '10' as HEX 10 and some will process 10 as DEC 10. So, in order
to avoid these games, I vote for leaving the 0x in place.
You can avoid it only if you could mark decimal numbers and that is
impossible.
@Tom: Does U-Boot still expect numbers to be hexadecimal values?
[1] https://www.denx.de/wiki/DULG/UBootCommandLineInterface
Signed-off-by: Stefan Herbrechtsmeier <stefan.herbrechtsme...@weidmueller.com>
---
cmd/part.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/cmd/part.c b/cmd/part.c
index 3395c17b89..56e1852c66 100644
--- a/cmd/part.c
+++ b/cmd/part.c
@@ -152,7 +152,7 @@ static int do_part_info(int argc, char *const argv[], enum
cmd_part_info param)
snprintf(buf, sizeof(buf), LBAF, info.size);
break;
case CMD_PART_INFO_NUMBER:
- snprintf(buf, sizeof(buf), "0x%x", part);
+ snprintf(buf, sizeof(buf), "%x", part);