71 lines
1.8 KiB
C
71 lines
1.8 KiB
C
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/* A file to test imorting C modules for handling arrays to Python */
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/* Python.h includes <stdio.h>, <string.h>, <errno.h>, <limits.h>, and <stdlib.h> (if available)*/
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#include "Python.h"
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#include "arrayobject.h"
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#include "numpy_module.h"
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#include "sympowerit.h"
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#include <cblas.h>
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/* ==== Set up the methods table ====================== */
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static PyMethodDef _numpy_moduleMethods[] = {
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{"sym_powerit", sym_powerit, METH_VARARGS},
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{NULL, NULL} /* Sentinel - marks the end of this structure */
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};
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/* ==== Initialize the numpy_module functions =============== */
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// Module name must be _numpy_module in compile and linked
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void init_numpy_module() {
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(void) Py_InitModule("_numpy_module", _numpy_moduleMethods);
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import_array(); // Must be present for NumPy. Called first after above line.
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}
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/* =========== Power iteration on symmetric matrix ========== */
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static PyObject *sym_powerit(PyObject *self, PyObject *args)
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{
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PyArrayObject *X=NULL, *T=NULL, *E=NULL,*U=NULL;
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double *tin, *ein, tol;
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int amax, n, info, maxiter, verbose;
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int dims[2];
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/* Parse tuple of input arguments*/
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if (!PyArg_ParseTuple(args, "O!O!iidii",
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&PyArray_Type, &X,
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&PyArray_Type, &T,
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&n,
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&amax,
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&tol,
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&maxiter,
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&verbose)
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)
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return NULL;
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if (NULL == X) return NULL;
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/* Get the dimensions of the input */
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n = X->dimensions[0];
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/* Create output/ work arrays, no inplace calculations */
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dims[0] = n;
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dims[1] = amax;
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U = (PyArrayObject*) PyArray_NewCopy(T, NPY_CORDER);
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dims[1] = n;
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E = (PyArrayObject*) PyArray_NewCopy(X, NPY_CORDER);
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/* Get pointers to contigous data (row-major)*/
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ein = (double *)E->data;
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tin = (double *)U->data;
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/* Call sympower method */
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info = sympowerit (ein, n, tin, amax, tol, maxiter, verbose);
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Py_DECREF(E);
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return Py_BuildValue("Ni", U, info);
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}
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