jyapayne/swig
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

More examples

Browse source 
git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@491 626c5289-ae23-0410-ae9c-e8d60b6d4f22
This commit is contained in:
Dave Beazley 2000-06-17 23:46:23 +00:00
commit e560c1d445
10 changed files with 326 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

1
Examples/perl5/simple/README
View file

@ -1 +0,0 @@
Simple example from users manual.

30
Examples/perl5/simple/example.c
View file

@ -1,24 +1,18 @@
/* Simple example from documentation */
/* File : example.c */
#include <time.h>
/* A global variable */
double Foo = 3.0;
double My_variable = 3.0;
/* Compute factorial of n */
int fact(int n) {
if (n <= 1) return 1;
else return n*fact(n-1);
}
/* Compute n mod m */
int my_mod(int n, int m) {
return (n % m);
/* Compute the greatest common divisor of positive integers */
int gcd(int x, int y) {
int g;
g = y;
while (x > 0) {
g = x;
x = y % x;
y = g;
}
return g;
}
char *get_time() {
long ltime;
time(&ltime);
return ctime(&ltime);
}

10
Examples/perl5/simple/example.i
View file

@ -1,11 +1,5 @@
/* File : example.i */
%module example
%{
/* Put headers and other declarations here */
%}
extern double My_variable;
extern int fact(int);
%name(mod) extern int my_mod(int n, int m);
extern char *get_time();
extern int gcd(int x, int y);
extern double Foo;

28
Examples/perl5/simple/example.pl
View file

@ -2,22 +2,22 @@
# Perl5 script for testing simple example
use example;
package example;
print get_time();
print "My Variable = $My_variable","\n";
for ($i = 0; $i < 14; $i++) {
$n = fact($i);
print "$i factorial is $n\n";
}
# Call our gcd() function
for ($i = 1; $i < 250; $i++) {
for ($j = 1; $j < 250; $j++) {
$n = mod($i,$j);
$My_variable = $My_variable + $n;
}
}
$x = 42;
$y = 105;
$g = example::gcd($x,$y);
print "The gcd of $x and $y is $g\n";
print "My_variable = ", $My_variable, "\n";
# Manipulate the Foo global variable
# Output its current value
print "Foo = $example::Foo\n";
# Change its value
$example::Foo = 3.1415926;
# See if the change took effect
print "Foo = $example::Foo\n";

101
Examples/perl5/simple/index.html Normal file
View file

@ -0,0 +1,101 @@
<html>
<head>
<title>SWIG:Examples:perl5:simple</title>
</head>
<body bgcolor="#ffffff">
<tt>SWIG/Examples/perl5/simple/</tt>
<hr>
<H2>Simple Perl5 Example</H2>
<tt>$Header$</tt><br>
<p>
This example illustrates how you can hook Perl to a very simple C program containing
a function and a global variable.
<h2>The C Code</h2>
Suppose you have the following C code:
<blockquote>
<pre>
/* File : example.c */
/* A global variable */
double Foo = 3.0;
/* Compute the greatest common divisor of positive integers */
int gcd(int x, int y) {
int g;
g = y;
while (x > 0) {
g = x;
x = y % x;
y = g;
}
return g;
}
</pre>
</blockquote>
<h2>The SWIG interface</h2>
Here is a simple SWIG interface file:
<blockquote>
<pre>
/* File: example.i */
%module example
extern int gcd(int x, int y);
extern double Foo;
</pre>
</blockquote>
<h2>Compilation</h2>
<ol>
<li><tt>swig -perl5 <a href="example.i">example.i</a></tt>
<p>
<li>This produces two files: <tt><a href="example_wrap.c">example_wrap.c</a></tt> and <tt><a href="example.pm">example.pm</a></tt>.
<p>
<li>Compile <tt><a href="example_wrap.c">example_wrap.c</a></tt> and <tt><a href="example.c">example.c</a></tt>
to create the extension <tt>example.so</tt>.
</ol>
<h2>Using the extension</h2>
Click <a href="example.pl">here</a> to see a script that calls our C functions from Perl.
<h2>Key points</h2>
<ul>
<li>Use the <tt>use</tt> statement to load your extension module from Perl. For example:
<blockquote>
<pre>
use example;
</pre>
</blockquote>
<li>C functions work just like Perl functions. For example:
<blockquote>
<pre>
$g = example::gcd(42,105);
</pre>
</blockquote>
<li>C global variables are accessed like ordinary Perl variables. For example:
<blockquote>
<pre>
$a = $example::Foo;
</pre>
</blockquote>
</ul>
<hr>
</body>
</html>