Informix Forum - Read-only Archive

Re: Help: Calling 4GL from C code

Posted By: Jonathan Leffler
Date: Thursday, 6 April 2006, at 12:27 a.m.

On 4/4/06, informix-forum@iiug.org <informix-forum@iiug.org> wrote:
> #105: Help: Calling 4GL from c code (THANARAJ KA....)

> MESSAGE: (#105) Help: Calling 4GL from c code
> <http://www.iiug.org/forums/informix-forum/index.cgi?rev=105>
> AUTHOR: THANARAJ KA....
> DATE: Tuesday, 4 April 2006, at 7:29 a.m.
>
> i get segmentation fault while using poping character string from argument
> stack, i know this is with pointer conversion type
>
> i dont know where exactly is the problem
> ------------------------------------------------------------------
> well i am working on Redhat Linux platform
>
> **************************C code ***************************************
>
> #include<fglapi.h>
> #include<fglsys.h>
> #include<stdio.h>
> #include<varchar.h>
>
> main()
> {
> long cust_id,cust_age,cust_result;
>
> char cust_name[30];
>
> printf("Enter customer ID:");
>
> scanf("%ld",&cust_id);
>
> printf("Enter customer Name:");
>
> scanf("%s", cust_name);
>
> printf("Enter customer Age:");
>
> scanf("%ld",&cust_age);
>
> pushlong(cust_id);
>
> ////////////////////////////////////////////Error happens when i pop
>
> pushvchar( cust_name , len);
>
> /////////////////////////////////////////////
>
> pushlong( cust_age );
>
> fgl_call(customer_insert,3);
>
> poplong(&cust_result);
>
> if(cust_result == 1)
>
> printf("Insertion into customer table successful");
>
> else
>
> printf("Insertion into customer table failed");
>
> break;

Syntax error - not in a loop or switch.

> default:

Probably not a syntax error - C is a funny language.

> exit();

Exit expects a value - you should provided it with a small integer
(conventionally zero for success and non-zero for failure).
> }
>
> }

Syntax error - not in a function (any more).

> fgl_end();
> }

More syntax errors - if you strip code before posting, please do it
more carefully, leaving syntactically valid code.

Q: You included fgl_end(), but why not the initialization code -
fgl_start() IIRC?

>********************************* 4GL *********************************
>
>FUNCTION customer_insert(id,age,name)
>
>DEFINE id,result,age INTEGER,
>
>name CHAR(40)

Q: You pushed the values on the stack in order - don't you have to pop
them off in the reverse order? That's my recollection, though I'm
rusty enough that I could be misremembering.

--
Jonathan Leffler #include <disclaimer.h>
Email: jleffler@earthlink.net, jleffler@us.ibm.com
Guardian of DBD::Informix v2005.02 -- http://dbi.perl.org/

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