add INPUT/OUTPUT support

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/branches/gsoc2009-sploving@11325 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/scilab/pointer/example.c

@@ -0,0 +1,16 @@
+/* File : example.c */
+
+void add(int *x, int *y, int *result) {
+  *result = *x + *y;
+}
+
+void sub(int *x, int *y, int *result) {
+  *result = *x - *y;
+}
+
+int divide(int n, int d, int *r) {
+   int q;
+   q = n/d;
+   *r = n - q*d;
+   return q;
+}

Examples/scilab/pointer/example.i

@@ -0,0 +1,30 @@
+/* File : example.i */
+%module example
+
+%{
+extern void add(int *, int *, int *);
+extern void sub(int *, int *, int *);
+extern int divide(int, int, int *);
+%}
+
+/* This example illustrates a couple of different techniques
+   for manipulating C pointers */
+
+/* First we'll use the pointer library 
+extern void add(int *x, int *y, int *result);
+%include cpointer.i
+%pointer_functions(int, intp);*/
+
+/* Next we'll use some typemaps */
+
+%include typemaps.i
+extern void sub(int *INPUT, int *INPUT, int *OUTPUT);
+
+/* Next we'll use typemaps and the %apply directive */
+
+%apply int *OUTPUT { int *r };
+extern int divide(int n, int d, int *r);
+
+
+
+

Examples/scilab/pointer/makefile

@@ -0,0 +1,15 @@
+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)' scilab
+
+clean::
+	$(MAKE) -f $(TOP)/Makefile scilab_clean
+	rm -f *.sce *.so lib*lib.c
+
+check: all

Examples/scilab/pointer/runme.sci

@@ -0,0 +1,20 @@
+// builder the *.so
+exec builder.sce
+
+//loader the *.so
+exec loader.sce
+
+//Now try the typemap library
+//This should be much easier. Now how it is no longer
+//necessary to manufacture pointers.
+
+printf("Trying the typemap library\n");
+r = sub(37,42);
+printf("     37 - 42 = %i\n",r);
+
+//Now try the version with multiple return values
+
+printf("Testing multiple return values\n");
+[q,r] = divide(42,37);
+printf("     42/37 = %d remainder %d\n",q,r);
+