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//
// This SWIG module shows how you can create a Python array class in C++
// and catch C++ exceptions.
%module darray
%{
// Exception class
class RangeError { };
%}
// This defines a SWIG exception handler. This code will be inserted
// into the wrapper code generated by SWIG. The variable '$function' is
// substituted with the *real* C++ function call.
%except(python) {
try {
$function
}
catch (RangeError) {
PyErr_SetString(PyExc_IndexError,"index out-of-bounds");
return NULL;
}
}
// Just define our class in-line since it has been specifically designed
// for Python anyways.
%inline %{
class DoubleArray {
private:
int n;
double *ptr;
int isslice;
public:
// Create a new array of fixed size
DoubleArray(int size) {
ptr = new double[size];
n = size;
isslice = 0;
}
// Create a slice (used internally)
#ifndef SWIG
DoubleArray(double *pt,int size) {
ptr = pt;
n = size;
isslice = 1;
}
#endif
// Destroy an array
~DoubleArray() {
if (!isslice)
delete [] ptr;
}
// Return the length of the array
int __len__() {
return n;
}
// Get an item from the array and perform bounds checking.
double __getitem__(int i) {
if ((i >= 0) && (i < n))
return ptr[i];
else
throw RangeError();
return 0;
}
// Set an item in the array and perform bounds checking.
void __setitem__(int i, double val) {
if ((i >= 0) && (i < n))
ptr[i] = val;
else {
throw RangeError();
}
}
// Return a slice of this array.
DoubleArray __getslice__(int low,int high) {
int i;
if (low < 0) low = 0;
if (low >= n) high = n;
if (high < 0) high = 0;
if (high >= n) high = n;
if (low > high) low = high;
return DoubleArray(ptr+low,high-low);
}
};
%}
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