RE: JNI in Java 1.6
- From: "Ken Perry" <whistler@xxxxxxxxxxxxx>
- To: <programmingblind@xxxxxxxxxxxxx>
- Date: Tue, 4 Jan 2011 12:58:07 -0500
The following shows how. Note the "...." operator in the function
definition.
/************************************************************************
*
* Purpose: Program to demonstrate functions that have a variable
* number of parameters.
* Author: M J Leslie.
* Date: 28-Mar-94
*
************************************************************************/
#include <stdio.h>
#include <stdarg.h> /* va_list, va_arg, va_end */
int set(char *item, int num, ...); /* Declare the function. */
/************************************************************************/
main()
{
char *item="pear";
int Ret;
Ret = set (item,4, "apple", "pear", "banana", "grape");
if (Ret)
{
printf ("%s found\n", item);
}
else
{
printf("%s not found\n", item);
}
}
/************************************************************************/
int set(char *item, int num, ...)
{
va_list ap; /* define 'ap' It acts as a
* pointer to the undefined
* variables. */
int Ret=0;
int Inc=0; /* Assume the worst. */
va_start(ap, num); /* seed 'ap' */
do
{
if ( item == va_arg(ap, char *))
{
Ret = 1;
}
} while ( Ret==0 && ++Inc < num);
va_end(ap); /* tidy up. */
return (Ret);
}
-----Original Message-----
From: programmingblind-bounce@xxxxxxxxxxxxx
[mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Andreas Stefik
Sent: Tuesday, January 04, 2011 11:41 AM
To: programmingblind@xxxxxxxxxxxxx
Subject: Re: JNI in Java 1.6
If it is possible to do that in C, I have never done so. When I want
such behavior, I usually pass an array/vector/list instead.
Stefik
On Sat, Jan 1, 2011 at 10:01 AM, John J. Boyer
<john.boyer@xxxxxxxxxxxxxxxxx> wrote:
> Thanks. I found a way to generate the curly braces for functions using
> find and replace. Is there a way to refer to the parameters of a C
> function by position in the argumennt list rather than giving them
> names?
>
> Thanks,
> John
>
> On Sat, Jan 01, 2011 at 09:36:11AM -0600, Andreas Stefik wrote:
>> Hi John,
>>
>> QuentinC is correct. I would add one more thing, in that JNI has been
>> in the JDK for a very long time, and to my knowledge there should not
>> be any significant difference (if any) between 1.5 and 1.6 in relation
>> to it.
>>
>> My team, for example, has used a ton of JNI code both on 1.5 platforms
>> and 1.6, with no changes.
>>
>> Stefik
>>
>> On Sat, Jan 1, 2011 at 4:20 AM, QuentinC <quentinc@xxxxxxxxxxx> wrote:
>> > Hello,
>> > Try javah with only the full class name. It should generate an header
called
>> > something like java_package_subpackage_classname.h.
>> > Note, I would rather advise JNA for most projects, except if the
binding has
>> > to be very quick. IN JNA you don't have to write any C/C++ binding
code, the
>> > DLL is directly loaded.
>> >
>> >
>> > __________
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>> >
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>
> --
> John J. Boyer; President, Chief Software Developer
> Abilitiessoft, Inc.
> http://www.abilitiessoft.com
> Madison, Wisconsin USA
> Developing software for people with disabilities
>
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