source: sasview/src/sas/sascalc/calculator/c_extensions/sld2i_module.cpp @ 25dd9c9

/**
  SLD2I module to perform point and I calculations
 */
#include <Python.h>
#include <stdio.h>
#include <sld2i.hh>

// Utilities
#define INVECTOR(obj,buf,len)                                                                           \
    do { \
        int err = PyObject_AsReadBuffer(obj, (const void **)(&buf), &len); \
        if (err < 0) return NULL; \
        len /= sizeof(*buf); \
    } while (0)

#define OUTVECTOR(obj,buf,len) \
    do { \
        int err = PyObject_AsWriteBuffer(obj, (void **)(&buf), &len); \
        if (err < 0) return NULL; \
        len /= sizeof(*buf); \
    } while (0)


/**
 * Delete a GenI object
 */
void del_sld2i(void *ptr){
        GenI* sld2i = static_cast<GenI *>(ptr);
        delete sld2i;
        return;
}

/**
 * Create a GenI as a python object by supplying arrays
 */
PyObject * new_GenI(PyObject *, PyObject *args) {
        PyObject *x_val_obj;
        PyObject *y_val_obj;
        PyObject *z_val_obj;
        PyObject *sldn_val_obj;
        PyObject *mx_val_obj;
        PyObject *my_val_obj;
        PyObject *mz_val_obj;
        PyObject *vol_pix_obj;
        Py_ssize_t n_x;
        //PyObject rlimit_obj;
        //PyObject npoints_obj;
        //PyObject nrbins_obj;
        //PyObject nphibins_obj;
        int n_pix;
        double* x_val;
        double* y_val;
        double* z_val;
        double* sldn_val;
        double* mx_val;
        double* my_val;
        double* mz_val;
        double* vol_pix;
        double inspin;
        double outspin;
        double stheta;

        if (!PyArg_ParseTuple(args, "iOOOOOOOOddd", &n_pix, &x_val_obj, &y_val_obj, &z_val_obj, &sldn_val_obj, &mx_val_obj, &my_val_obj, &mz_val_obj, &vol_pix_obj, &inspin, &outspin, &stheta)) return NULL;
        OUTVECTOR(x_val_obj, x_val, n_x);
        OUTVECTOR(y_val_obj, y_val, n_x);
        OUTVECTOR(z_val_obj, z_val, n_x);
        OUTVECTOR(sldn_val_obj, sldn_val, n_x);
        OUTVECTOR(mx_val_obj, mx_val, n_x);
        OUTVECTOR(my_val_obj, my_val, n_x);
        OUTVECTOR(mz_val_obj, mz_val, n_x);
        OUTVECTOR(vol_pix_obj, vol_pix, n_x);
        GenI* sld2i = new GenI(n_pix,x_val,y_val,z_val,sldn_val,mx_val,my_val,mz_val,vol_pix,inspin,outspin,stheta);
        return PyCObject_FromVoidPtr(sld2i, del_sld2i);
}

/**
 * GenI the given input (2D) according to a given object
 */
PyObject * genicom_inputXY(PyObject *, PyObject *args) {
        int npoints;
        PyObject *qx_obj;
        double *qx;
        PyObject *qy_obj;
        double *qy;
        PyObject *I_out_obj;
        Py_ssize_t n_out;
        double *I_out;
        PyObject *gen_obj;

        if (!PyArg_ParseTuple(args, "OiOOO",  &gen_obj, &npoints, &qx_obj, &qy_obj, &I_out_obj)) return NULL;
        OUTVECTOR(qx_obj, qx, n_out);
        OUTVECTOR(qy_obj, qy, n_out);
        OUTVECTOR(I_out_obj, I_out, n_out);

        // Sanity check
        //if(n_in!=n_out) return Py_BuildValue("i",-1);

        // Set the array pointers
        void *temp = PyCObject_AsVoidPtr(gen_obj);
        GenI* s = static_cast<GenI *>(temp);

        s->genicomXY(npoints, qx, qy, I_out);
        //return PyCObject_FromVoidPtr(s, del_genicom);
        return Py_BuildValue("i",1);
}

/**
 * GenI the given 1D input according to a given object
 */
PyObject * genicom_input(PyObject *, PyObject *args) {
        int npoints;
        PyObject *q_obj;
        double *q;
        PyObject *I_out_obj;
        Py_ssize_t n_out;
        double *I_out;
        PyObject *gen_obj;

        if (!PyArg_ParseTuple(args, "OiOO",  &gen_obj, &npoints, &q_obj, &I_out_obj)) return NULL;
        OUTVECTOR(q_obj, q, n_out);
        OUTVECTOR(I_out_obj, I_out, n_out);

        // Sanity check
        //if(n_in!=n_out) return Py_BuildValue("i",-1);

        // Set the array pointers
        void *temp = PyCObject_AsVoidPtr(gen_obj);
        GenI* s = static_cast<GenI *>(temp);

        s->genicom(npoints, q, I_out);
        //return PyCObject_FromVoidPtr(s, del_genicom);
        return Py_BuildValue("i",1);
}

/**
 * Define module methods
 */
static PyMethodDef module_methods[] = {
        {"new_GenI", (PyCFunction)new_GenI, METH_VARARGS,
                  "Create a new GenI object"},
        {"genicom",(PyCFunction)genicom_input, METH_VARARGS,
                  "genicom the given 1d input arrays"},
        {"genicomXY",(PyCFunction)genicom_inputXY, METH_VARARGS,
                  "genicomXY the given 2d input arrays"},
    {NULL}
};


#ifndef PyMODINIT_FUNC  /* declarations for DLL import/export */
#define PyMODINIT_FUNC void
#endif
PyMODINIT_FUNC
initsld2i(void)
{
    Py_InitModule3("sld2i", module_methods, "Sld2i module");
}