This example illustrates how you can hook Go to a very simple C program containing a function and a global variable.
/* 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; }
/* File: example.i */ %module example extern int gcd(int x, int y); extern double Foo;
import "example"
(If there are name conflicts, you can use the %rename directive in the .i file or the -rename option to Go to rename one or the other symbol).g := example.Gcd(42,105)
a = example.GetFoo()