convert hexa to decimal values

[mobidyc]

Hello,

i'm trying to convert an hexadicimal value to decimal but it seems impossible with my knowledge. ;)

that's what i tried (under ksh).
HPUX B.11.00:
# echo 0xfffff000=D |adb
-4096
# printf "%d\n" 0xfffff000
printf: Error converting 0xfffff000
2147483647
# print - $((16#fffff000))
-4096
# echo "obase=86 0xfffff000" |bc -l
syntax error on line 1, /usr/lib/lib.b
# echo "obase=86 ; fffff000" |bc
syntax error on line 1
# echo "fffff000" |tr "[[:xdigit:]]" "[[:digit:]]"
tr: String2 contains an invalid character class.

i've the same errors in HP-UX B.11.11/B.11.23

i need to convert these values for a script so, do you have advice for it ?

Regards,
Cedrick Gaillard

[Dennis Handly]

You can use this one liner:
$ typeset -i10 x=16#fffff000; echo $x
(This returns an unsigned int for 11.23 and 11.31 ksh. sh returns -4096.)

What was wrong with your adb and $(( )) solutions?

[James R. Ferguson]

Hi:

There's nothing wrong with your methodology, only that your numbers exceed 32-bit integers.

Regards!

...JRF...

[mobidyc]

thanks for your answers,

i know now that this is because my numbers exceed 32-bit integers.

do you have a solution for convert these values correctly ?
my system is 64bits, is there a 64bit binary who can calculate the result?

the result of 0xfffff000 would be 4294963200, not -4096

and why

[Bill Hassell]

bc is your friend. Although ksh93 does exist on HP-UX (skillfully hidden away in /usr/dt/bin/dtksh) it is also limited to 32 bit numbers. bc can handle large numbers:

$ echo "4294963200*1234.234"|bc
5300989610188.800

[James R. Ferguson · Accepted solution]

Hi (again) Cedrick:

In the shell, using 'bc' is an easy way:

# echo "obase=10;ibase=16;FFFFF000"|bc

...note the uppercase hexadecimal digits.

Regards!

...JRF...

[mobidyc]

Hello,

as indicated behind, i've tried bc, maybe with a wrong syntax:

# echo "obase=86 ; fffff000/1024/1024" |bc
syntax error on line 1,

i've just looking something, at home i've a linux, it have a 32bit processor however, it can convert without problem so, where is the limitation ?

$> uname -s ; printf "%d\n" 0xfffff000
Linux
4294963200

# uname -s ; printf "%d\n" 0xfffff000
HP-UX
printf: Error converting 0xfffff000
2147483647

Regards,
Cedrick Gaillard

[James R. Ferguson]

Hi (again) Cedrick:

Use UPPERCASE hexadecimal digits with 'bc' as I showed above.

Regards!

...JRF...

[mobidyc]

Big thanks James,

the uppercase letter give me no errors from bc now and correct my [io]base variables has gived to me a good result.

problem is solved, thanks ;)

Regards,
Cedrick Gaillard

[Dennis Handly]

>at home i've a linux, it have a 32bit processor however, it can convert without problem so, where is the limitation?

Does it handle arbitrary 64 bit numbers? Like the 11.23 ksh?

I guess it depends on the standard and whether it is worth it to extend it to long longs.