Re: Converting packed decimal to a char array

Thanks, Jon.

Well, by now I found these editing function and got the following:

decimal (15,0) A = 125678D ;
char szTemp[256], szOutput[256], EditMask[256], ZeroFill[1] ;
int n, m, MaskLen, RcvLen ;
Qus_EC_t error_code ;

n = digitsof(A) ;
m = precisionof(A) ;

QECCVTEC(EditMask, &MaskLen, &RcvLen, ZeroFill, "P", " ", n, m,
&error_code) ;

QECEDT(szTemp, RcvLen, &A, "*PACKED ", n, EditMask, MaskLen, "0",
&error_code) ;
memcpy(szOutput, szTemp, RcvLen) ;
szOutput[RcvLen] = 0x00 ;
printf("After conversion A: !%s!\n", szOutput) ;


It produces the following:
After conversion A: ! 125678!
What I expected is a number padded with zeros in the left.
I have to check if the receiver program will accept the changed input...

Is it what you meant in your advise?

You asked what for do I need it.
I have a big set of API-s on iSeries that are called via RPC from PC
environment. The input and outputs are both data buffers that are
effectively packed structures - that is data fields without any
separators with known widths. This is as infrastructure and I cannot
change it. Packed numbers are always returned as char arrays - and it
is also part of the infrastructure....



On Fri, Jan 9, 2015 at 5:47 PM, Jon Paris <jon.paris@xxxxxxxxxxxxxx> wrote:

It would help to know why you are trying to do this (editing the number for example?).

Have you looked at the various editing and conversion capabilities available in the surfaced MI functions (https://publib.boulder.ibm.com/iseries/v5r1/ic2924/books/c0924180.pdf) as well as the C/C++ library extensions? (http://www-01.ibm.com/support/knowledgecenter/#!/ssw_ibm_i_72/rtref/rtrefmain.htm).

Everything you could need is there.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On Jan 9, 2015, at 4:00 AM, Jevgeni Astanovski <jevgeniast@xxxxxxxxx> wrote:

Hi all,

spend a lot of time and feeling like I run into a dead cycle with a
problem, that looks trivial.

I have packed decimals in my C programs that I need to convert to a
char array, representing the number (not zero terminated string).

For example:

decimal (15,9) A ;
char szTemp[32], sField[16] ;

sprintf(szTemp, "%016D(15,9)", A) ;
memcpy(sField, szTemp, 16) ;

What I want to achieve is get a function, that receives A and returns sField.
Of course it must support any types of decimal - not only decimal
(15,9) but others like decimal(11,7), decimal (15,0), decimal (5,0)
and so on. And, of course, decimal can be positive or negative...


Any ideas?

Jevgeni.
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