#include "pyutil.h"

#include <iostream>

#include <string>

namespace contrib

{

#if PY_MAJOR_VERSION >= 3

#define HG_FUZZER_PY3 1

PyMODINIT_FUNC PyInit_parsers(void);

#else

PyMODINIT_FUNC initparsers(void);

#endif

static char cpypath[8192] = "\0";

static PyObject *mainmod;

static PyObject *globals;

void initpy(const char *cselfpath)

{

#ifdef HG_FUZZER_PY3

	const std::string subdir = "/sanpy/lib/python3.8";

#else

	const std::string subdir = "/sanpy/lib/python2.7";

#endif

	/* HACK ALERT: we need a full Python installation built without

	   pymalloc and with ASAN, so we dump one in

	   $OUT/sanpy/lib/python2.7. This helps us wire that up. */

	std::string selfpath(cselfpath);

	std::string pypath;

	auto pos = selfpath.rfind("/");

	if (pos == std::string::npos) {

		char wd[8192];

		if (!getcwd(wd, 8192)) {

			std::cerr << "Failed to call getcwd: errno " << errno

			          << std::endl;

			exit(1);

		}

		pypath = std::string(wd) + subdir;

	} else {

		pypath = selfpath.substr(0, pos) + subdir;

	}

	strncpy(cpypath, pypath.c_str(), pypath.size());

	setenv("PYTHONPATH", cpypath, 1);

	setenv("PYTHONNOUSERSITE", "1", 1);

	/* prevent Python from looking up users in the fuzz environment */

	setenv("PYTHONUSERBASE", cpypath, 1);

#ifdef HG_FUZZER_PY3

	std::wstring wcpypath(pypath.begin(), pypath.end());

	Py_SetPythonHome(wcpypath.c_str());

#else

	Py_SetPythonHome(cpypath);

#endif

	Py_InitializeEx(0);

	mainmod = PyImport_AddModule("__main__");

	globals = PyModule_GetDict(mainmod);

#ifdef HG_FUZZER_PY3

	PyObject *mod = PyInit_parsers();

#else

	initparsers();

	PyObject *mod = PyImport_ImportModule("parsers");

#endif

	PyDict_SetItemString(globals, "parsers", mod);

}

PyObject *pyglobals()

{

	return globals;

}

} // namespace contrib