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+/* File : example.i */
+%module example
+
+%{
+extern int gcd(int x, int y);
+extern int gcdmain(int argc, char *argv[]);
+extern int count(char *bytes, int len, char c);
+extern void capitalize (char *str, int len);
+extern void circle (double cx, double cy);
+extern int squareCubed (int n, int *OUTPUT);
+%}
+
+%include exception.i
+%include typemaps.i
+
+extern int gcd(int x, int y);
+
+%typemap(in,fragment="t_output_helper") (int argc, char *argv[]) {
+ int i;
+ if (!PyList_Check($input)) {
+ SWIG_exception(SWIG_ValueError, "Expecting a list");
+ }
+ $1 = PyList_Size($input);
+ if ($1 == 0) {
+ SWIG_exception(SWIG_ValueError, "List must contain at least 1 element");
+ }
+ $2 = (char **) malloc(($1+1)*sizeof(char *));
+ for (i = 0; i < $1; i++) {
+ PyObject *s = PyList_GetItem($input,i);
+%#if PY_VERSION_HEX >= 0x03000000
+ if (!PyUnicode_Check(s))
+%#else
+ if (!PyString_Check(s))
+%#endif
+ {
+ free($2);
+ SWIG_exception(SWIG_ValueError, "List items must be strings");
+ }
+%#if PY_VERSION_HEX >= 0x03000000
+ {
+ int l;
+ $2[i] = PyUnicode_AsStringAndSize(s, &l);
+ }
+%#else
+ $2[i] = PyString_AsString(s);
+%#endif
+
+ }
+ $2[i] = 0;
+}
+
+extern int gcdmain(int argc, char *argv[]);
+
+%typemap(in) (char *bytes, int len) {
+
+%#if PY_VERSION_HEX >= 0x03000000
+ if (!PyUnicode_Check($input)) {
+ PyErr_SetString(PyExc_ValueError,"Expected a string");
+ return NULL;
+ }
+ $1 = PyUnicode_AsStringAndSize($input, &$2);
+%#else
+ if (!PyString_Check($input)) {
+ PyErr_SetString(PyExc_ValueError,"Expected a string");
+ return NULL;
+ }
+ $1 = PyString_AsString($input);
+ $2 = PyString_Size($input);
+%#endif
+}
+
+extern int count(char *bytes, int len, char c);
+
+
+/* This example shows how to wrap a function that mutates a string */
+
+/* Since str is modified, we make a copy of the Python object
+ so that we don't violate it's mutability */
+
+%typemap(in) (char *str, int len) {
+%#if PY_VERSION_HEX >= 0x03000000
+ $2 = PyUnicode_GetSize($input);
+ $1 = (char *) malloc($2+1);
+ memmove($1,PyUnicode_AsString($input),$2);
+%#else
+ $2 = PyString_Size($input);
+ $1 = (char *) malloc($2+1);
+ memmove($1,PyString_AsString($input),$2);
+%#endif
+}
+
+/* Return the mutated string as a new object. The t_output_helper
+ function takes an object and appends it to the output object
+ to create a tuple */
+
+%typemap(argout) (char *str, int len) {
+ PyObject *o;
+%#if PY_VERSION_HEX >= 0x03000000
+ o = PyUnicode_FromStringAndSize($1,$2);
+%#else
+ o = PyString_FromStringAndSize($1,$2);
+%#endif
+ $result = t_output_helper($result,o);
+ free($1);
+}
+
+extern void capitalize(char *str, int len);
+
+/* A multi-valued constraint. Force two arguments to lie
+ inside the unit circle */
+
+%typemap(check) (double cx, double cy) {
+ double a = $1*$1 + $2*$2;
+ if (a > 1.0) {
+ SWIG_exception(SWIG_ValueError,"$1_name and $2_name must be in unit circle");
+ }
+}
+
+extern void circle(double cx, double cy);
+
+