Start on a second Python extension module...

...to wrap utility functions from libgps.a.  The first entry point
implemented is the geoidal separation calculator, because gssim needs
it.

1 files changed, 38 insertions, 0 deletions

diff --git a/gpslib.c b/gpslib.c
new file mode 100644
index 00000000..ddd4582e
--- /dev/null
+++ b/gpslib.c
@@ -0,0 +1,38 @@
+/* $Id$ */
+/*
+ * Python binding for the libgps library functions
+ */
+#include <Python.h>
+
+#include <stdio.h>
+#include "gps.h"
+
+static PyObject *
+gpslib_wgs84_separation(PyObject *self, PyObject *args)
+{
+    const double lat, lon;
+    double sep;
+
+    if (!PyArg_ParseTuple(args, "dd", &lat, &lon))
+        return NULL;
+    sep = wgs84_separation(lat, lon);
+    return Py_BuildValue("d", sep);
+}
+
+/* List of functions defined in the module */
+
+static PyMethodDef gpslib_methods[] = {
+    {"wgs84_separation",	gpslib_wgs84_separation,	METH_VARARGS,
+     PyDoc_STR("Return WGS85 geidetic separation in meters.")},
+    {NULL,		NULL}		/* sentinel */
+};
+
+PyDoc_STRVAR(module_doc,
+"Python binding of selected libgps library routines.\n\
+");
+
+PyMODINIT_FUNC
+initgpslib(void)
+{
+    Py_InitModule3("gpslib", gpslib_methods, module_doc);
+}