interfacing other languages

interfacing other languages

[David Eduardo Gomez Noguera]

Hello.

I have a pad im writing some libraries for, in C, that need to ba called
from java.

Can anyone direct me to a link or book to read on how to write such
interfaces?
It'd be usefull to know it for any other case, as in use those same
libraries from, say, perl, or some othere scripting or non scripting
language, if possible.

thanks.

Re: interfacing other languages

[Hemant Mohan]

C libraries can be called from Java using the java Native Interface (JNI) 
interface. There is a nice JNI tutorial at
http://java.sun.com/docs/books/tutorial/native1.1/index.html

hemant
On Friday 31 January 2003 08:10 am, linux-c-programming-owner@vger.kernel.org 
wrote:
> Hello.
>
> I have a pad im writing some libraries for, in C, that need to ba called
> from java.
>
> Can anyone direct me to a link or book to read on how to write such
> interfaces?
> It'd be usefull to know it for any other case, as in use those same
> libraries from, say, perl, or some othere scripting or non scripting
> language, if possible.
>
> thanks.
>
>
>
> -
> To unsubscribe from this list: send the line "unsubscribe
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> the body of a message to majordomo@vger.kernel.org
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Reading from pipe

[Alexi Jordanov]

Hello,

I'm using pipes at this moment and I try decrease
threads in my application. Therefore I need to know
whether there is a way to check if there are any
available bytes in pipe. I don't want to use blocking
read operation. Just to check and if there are then to
read them.

Regards, 
Alex

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Re: Reading from pipe

[Glynn Clements]

Alexi Jordanov wrote:

> I'm using pipes at this moment and I try decrease
> threads in my application. Therefore I need to know
> whether there is a way to check if there are any
> available bytes in pipe. I don't want to use blocking
> read operation. Just to check and if there are then to
> read them.

select() will indicate whether or not there is any data available; if
there is, then read() will read whatever data is available, up to a
maximum of the size of its buffer (it won't block trying to read the
specified number of bytes).

Alternatively, ioctl(FIONREAD) will return (in the int to which its
third argument points) the number of bytes currently available.

-- 
Glynn Clements <glynn.clements@virgin.net>

using perl regex engine from C ?

[J.]

Hello...

I was wondering if it is possible to access the perl regex engine from a
C program. Is there a interface to it? Have people done it ? I
guess so, but where should I start searching ? G00gle fails to coff up
anything usefull and I am not really perlological enlightend. 

Any pointers, thoughts or suggestions would be most welcomed.

Thnkx...

J.

Re: (F)using perl regex engine from C ?

[Steven Smith]

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> I was wondering if it is possible to access the perl regex engine from a
> C program. Is there a interface to it? Have people done it ? I
> guess so, but where should I start searching ?
It isn't the Perl regex engine, but libpcre (Perl Compatible Regular
Expressions) is fairly close.

Failing that, you'd probably need to either copy and paste chunks of
the Perl source code, or use libperl and run the regexps from embedded
Perl.

Of course, if you just need regular expressions, and aren't bothered
about the Perl-specific things, you could use the regex functions in
libc (regcomp, regexec, regerror, and regfree).

Steven Smith,
sos22@cam.ac.uk.

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Re: using perl regex engine from C ?

[J.]

On Thu, 13 Feb 2003, Steven Smith wrote:

> > I was wondering if it is possible to access the perl regex engine from a
> > C program. Is there a interface to it? Have people done it ? I
> > guess so, but where should I start searching ?

> It isn't the Perl regex engine, but libpcre (Perl Compatible Regular
> Expressions) is fairly close.

Ah, I have found all the information I need at:
http://www.pcre.org

Thank you,

> Steven Smith,
> sos22@cam.ac.uk.

J.