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Re: CALL_EXTERNAL [message #31625 is a reply to message #1268]

Tue, 30 July 2002 19:26

Mark Rivers
Messages: 49
Registered: February 2000

Member

Zakaria Aygula <zaygula@med.miami.edu> 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

The way IDL passes strings to CALL_EXTERNAL has changed between IDL 5.4 and
IDL 5.5, because the definition of an IDL_STRING structure in export.h has
changed. This is the IDL 5.5 definition:
typedef int IDL_STRING_SLEN_T;
#define IDL_STRING_MAX_SLEN 2147483647
typedef struct { /* Define string descriptor */
IDL_STRING_SLEN_T slen; /* Length of string, 0 for null */
short stype; /* type of string, static or dynamic */
char *s; /* Addr of string */
} IDL_STRING;

In IDL 5.4 IDL_STRING_SLEN_T was "short", now it is "int", so strings can be
much longer now. CALL_EXTERNAL will still work, but you need to recompile
your shareable library with the new version of export.h

Mark Rivers

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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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