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Re: CALL_EXTERNAL [message #31614 is a reply to message #1268]

Wed, 31 July 2002 07:35

zaygula
Messages: 2
Registered: July 2002

Junior Member

zaygula@med.miami.edu (Zakaria Aygula) wrote in message news:<c934bc5c.0207300643.123066ce@posting.google.com>...
> Hi all,
>
> I am not able to pass below strings from IDL 5.5 to c/c++ interface
> running on Red Hat Linux 7.3 2.96-110. The same code worked well on
> IDL 5.4 on solaris
> The fragment of the code is shown below.
>
> FUNCTION vgam_wrap_do_query, query, dest
> FORWARD_FUNCTION lib_name, lib_func_name
>
> IPaddress = 'localhost'
> DBname = 'gas'
> DBlogin = 'ziko'
> DBpasswd = 'tabes'
> rc = call_external(lib_name('gavaidl'), $
> lib_func_name('gava_idl_do_query'),$
> query, dest, n_elements(dest), $
> IPaddress, $
> DBname, $
> DBlogin, $
> DBpasswd, $
> /i_value, $
> /portable )
> return, rc
>
> end
>
> IDL>dest=strarr(16)
> IDL>query='SELECT * FROM table1'
> %Compiled module: LIB_NAME.
> %Compiled module: LIB_FUNC_NAME.
>
> printed results from c/c++ interface
>
> cout<<IPaddress[0].s<<endl; = (null) expected output 'localhost'
> cout<<DBname[0].s <<endl; = (null) expected output 'gas'
> cout<<DBlogin[0].s <<endl; = (null) expected output 'ziko'
> cout<<DBpasswd[0].s <<endl; = (null) expected output 'tabes'

After building up the shared object files with "export.h" of IDL_5.5,
then "cout<<IPaddress[0].slen<<endl; etc.. " gave correct string length
but "cout<<IPaddress[0].s<<endl; etc.." still gives "null" output.

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[Message index]

		CALL_EXTERNAL By: dean on Wed, 18 August 1993 09:38
		Re: Call_external By: Inigo Garcia on Thu, 12 June 1997 00:00
		Re: call_external By: Vap User on Wed, 05 August 1998 00:00
		Re: call_external By: rivers on Wed, 12 August 1998 00:00
		Re: CALL_EXTERNAL By: menakkis on Mon, 22 February 1999 00:00
		Re: CALL_EXTERNAL By: ashmall on Wed, 03 March 1999 00:00
		Re: CALL_EXTERNAL By: Nigel Wade on Mon, 22 July 2002 01:44
		Re: CALL_EXTERNAL By: ronn on Sat, 20 July 2002 06:25
		Re: CALL_EXTERNAL By: Craig Markwardt on Fri, 19 July 2002 15:00
		Re: CALL_EXTERNAL By: zaygula on Wed, 31 July 2002 07:35
		Re: CALL_EXTERNAL By: Mark Rivers on Tue, 30 July 2002 19:26
		Re: CALL_EXTERNAL By: Randall Skelton on Wed, 05 February 2003 00:47
		Re: Call_external By: Karl Schultz on Wed, 10 March 2004 11:02
		Re: Call_external By: Haje Korth on Wed, 10 March 2004 09:20
		Re: Call_external By: Dr Paul Ducksbury on Wed, 10 March 2004 06:39
		Re: Call_external By: scuaic on Thu, 11 March 2004 14:32
		Re: Call_external By: Haje Korth on Wed, 10 March 2004 05:11
		Re: Call_external By: Pepijn Kenter on Wed, 10 March 2004 05:19
		Re: Call_external By: Dr Paul Ducksbury on Wed, 10 March 2004 05:02
		Re: call_external By: Haje Korth on Sun, 17 February 2013 05:53
		Re: call_external By: Katerina Yakimenko on Thu, 07 March 2013 05:55
		Re: call_external By: David Fanning on Thu, 07 March 2013 06:42
		Re: call_external By: Katerina Yakimenko on Thu, 07 March 2013 06:23
		Re: call_external By: David Fanning on Thu, 07 March 2013 06:10

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