5 files changed, 86 insertions, 0 deletions
diff --git a/Examples/ruby/funcptr2/Makefile b/Examples/ruby/funcptr2/Makefile
new file mode 100644
index 0000000..8c4fe10
--- /dev/null
+++ b/Examples/ruby/funcptr2/Makefile
@@ -0,0 +1,18 @@
+TOP        = ../..
+SWIG       = $(TOP)/../preinst-swig
+SRCS       = example.c
+TARGET     = example
+INTERFACE  = example.i
+
+all::
+	$(MAKE) -f $(TOP)/Makefile SRCS='$(SRCS)' SWIG='$(SWIG)' \
+	TARGET='$(TARGET)' INTERFACE='$(INTERFACE)' ruby
+
+static::
+	$(MAKE) -f $(TOP)/Makefile SRCS='$(SRCS)' SWIG='$(SWIG)' \
+	TARGET='myruby' INTERFACE='$(INTERFACE)' ruby_static
+
+clean::
+	$(MAKE) -f $(TOP)/Makefile ruby_clean
+
+check: all
diff --git a/Examples/ruby/funcptr2/example.c b/Examples/ruby/funcptr2/example.c
new file mode 100644
index 0000000..5c4a3da
--- /dev/null
+++ b/Examples/ruby/funcptr2/example.c
@@ -0,0 +1,19 @@
+/* File : example.c */
+
+int do_op(int a, int b, int (*op)(int,int)) {
+  return (*op)(a,b);
+}
+
+int add(int a, int b) {
+  return a+b;
+}
+
+int sub(int a, int b) {
+  return a-b;
+}
+
+int mul(int a, int b) {
+  return a*b;
+}
+
+int (*funcvar)(int,int) = add;
diff --git a/Examples/ruby/funcptr2/example.h b/Examples/ruby/funcptr2/example.h
new file mode 100644
index 0000000..9936e24
--- /dev/null
+++ b/Examples/ruby/funcptr2/example.h
@@ -0,0 +1,9 @@
+/* file: example.h */
+
+extern int do_op(int,int, int (*op)(int,int));
+extern int add(int,int);
+extern int sub(int,int);
+extern int mul(int,int);
+
+extern int (*funcvar)(int,int);
+
diff --git a/Examples/ruby/funcptr2/example.i b/Examples/ruby/funcptr2/example.i
new file mode 100644
index 0000000..681775a
--- /dev/null
+++ b/Examples/ruby/funcptr2/example.i
@@ -0,0 +1,18 @@
+/* File : example.i */
+%module example
+%{
+#include "example.h"
+%}
+
+/* Wrap a function taking a pointer to a function */
+extern int  do_op(int a, int b, int (*op)(int, int));
+
+/* Now install a bunch of "ops" as constants */
+%callback("%(upper)s");
+int add(int, int);
+int sub(int, int);
+int mul(int, int);
+%nocallback;
+
+extern int (*funcvar)(int,int);
+
diff --git a/Examples/ruby/funcptr2/runme.rb b/Examples/ruby/funcptr2/runme.rb
new file mode 100644
index 0000000..99b9842
--- /dev/null
+++ b/Examples/ruby/funcptr2/runme.rb
@@ -0,0 +1,22 @@
+require 'example'
+
+a = 37
+b = 42
+
+# Now call our C function with a bunch of callbacks
+
+puts "Trying some C callback functions"
+puts "    a        = #{a}"
+puts "    b        = #{b}"
+puts "    ADD(a,b) = #{Example.do_op(a,b,Example::ADD)}"
+puts "    SUB(a,b) = #{Example.do_op(a,b,Example::SUB)}"
+puts "    MUL(a,b) = #{Example.do_op(a,b,Example::MUL)}"
+
+puts "Here is what the C callback function objects look like in Ruby"
+puts "    ADD      = #{Example::ADD}"
+puts "    SUB      = #{Example::SUB}"
+puts "    MUL      = #{Example::MUL}"
+
+puts "Call the functions directly..."
+puts "    add(a,b) = #{Example.add(a,b)}"
+puts "    sub(a,b) = #{Example.sub(a,b)}"