#include "Python.h"

#include "osdefs.h"

static char *prefix, *exec_prefix, *progpath, *module_search_path=NULL;

static void

calculate_path()

{ 

	char *pypath = getenv("Python$Path");

	if (pypath) {

		int pathlen = strlen(pypath);

		module_search_path = malloc(pathlen + 1);

		if (module_search_path) 

			strncpy(module_search_path, pypath, pathlen + 1);

		else {

			fprintf(stderr, 

				"Not enough memory for dynamic PYTHONPATH.\n"

				"Using default static PYTHONPATH.\n");

		}

	}

	if (!module_search_path) 

		module_search_path = "<Python$Dir>.Lib";

	prefix = "<Python$Dir>";

	exec_prefix = prefix;

	progpath = Py_GetProgramName();

}

/* External interface */

char *

Py_GetPath()

{

	if (!module_search_path)

		calculate_path();

	return module_search_path;

}

char *

Py_GetPrefix()

{

	if (!module_search_path)

		calculate_path();

	return prefix;

}

char *

Py_GetExecPrefix()

{

	if (!module_search_path)

		calculate_path();

	return exec_prefix;

}

char *

Py_GetProgramFullPath()

{

	if (!module_search_path)

		calculate_path();

	return progpath;

}