05-15-2008
fuction return in perl
Hi All,
I have a perl script(1.pl) that calls a c function defined in another file sample.c
#!/usr/bin/perl
my $re = 1;
my @s = `/home/PERL_SCRIPTING/Rough/sample pline $re 10`;
print "$_" foreach(@s);
The sample.c is as bwlow:
# include <stdio.h>
int pline(int, int);
main(int argc,char *argv[])
{
int i,j;
printf("Wow Entered main\n");
printf(" %s ", argv[1]);
printf(" %s ", argv[2]);
printf(" %s ", argv[3]);
if(strcmp(argv[1],"pline") == 0)
{
int i,j,k;
i = atoi(argv[2]);
j = atoi(argv[3]);
printf("value of i is %d \n",i);
k = pline(i,j);
printf("%d",k);
}
}
int pline( int x, int y)
{
x = x + 20;
printf("value of x : %d", x);
printf("\n");
return(x);
}
I can call the c function and values are printing. But i need only the value of k to be stored in a variable in the perl script so that i can use it later in teh script.
Is their any solution for this??
Thanks in advance
JS
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LEARN ABOUT DEBIAN
plack::app::cgibin
Plack::App::CGIBin(3pm) User Contributed Perl Documentation Plack::App::CGIBin(3pm)
NAME
Plack::App::CGIBin - cgi-bin replacement for Plack servers
SYNOPSIS
use Plack::App::CGIBin;
use Plack::Builder;
my $app = Plack::App::CGIBin->new(root => "/path/to/cgi-bin")->to_app;
builder {
mount "/cgi-bin" => $app;
};
# Or from the command line
plackup -MPlack::App::CGIBin -e 'Plack::App::CGIBin->new(root => "/path/to/cgi-bin")->to_app'
DESCRIPTION
Plack::App::CGIBin allows you to load CGI scripts from a directory and convert them into a PSGI application.
This would give you the extreme easiness when you have bunch of old CGI scripts that is loaded using cgi-bin of Apache web server.
HOW IT WORKS
This application checks if a given file path is a perl script and if so, uses CGI::Compile to compile a CGI script into a sub (like
ModPerl::Registry) and then run it as a persistent application using CGI::Emulate::PSGI.
If the given file is not a perl script, it executes the script just like a normal CGI script with fork & exec. This is like a normal web
server mode and no performance benefit is achieved.
The default mechanism to determine if a given file is a Perl script is as follows:
o Check if the filename ends with ".pl". If yes, it is a Perl script.
o Open the file and see if the shebang (first line of the file) contains the word "perl" (like "#!/usr/bin/perl"). If yes, it is a Perl
script.
You can customize this behavior by passing "exec_cb" callback, which takes a file path to its first argument.
For example, if your perl-based CGI script uses lots of global variables and such and are not ready to run on a persistent environment, you
can do:
my $app = Plack::App::CGIBin->new(
root => "/path/to/cgi-bin",
exec_cb => sub { 1 },
)->to_app;
to always force the execute option for any files.
AUTHOR
Tatsuhiko Miyagawa
SEE ALSO
Plack::App::File CGI::Emulate::PSGI CGI::Compile Plack::App::WrapCGI
See also Plack::App::WrapCGI if you compile one CGI script into a PSGI application without serving CGI scripts from a directory, to remove
overhead of filesystem lookups, etc.
perl v5.14.2 2011-11-02 Plack::App::CGIBin(3pm)