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#include <Python.h>
#include <contrib/tools/python3/src/Include/internal/pycore_runtime.h> // _PyRuntime_Initialize()
#include <stdlib.h>
#include <string.h>
#include <locale.h>
void Py_InitArgcArgv(int argc, wchar_t **argv);
char* GetPyMain();
static const char* env_entry_point = "Y_PYTHON_ENTRY_POINT";
static const char* env_bytes_warning = "Y_PYTHON_BYTES_WARNING";
#ifdef _MSC_VER
extern char** environ;
void unsetenv(const char* name) {
const int n = strlen(name);
char** dst = environ;
for (char** src = environ; *src; src++)
if (strncmp(*src, name, n) || (*src)[n] != '=')
*dst++ = *src;
*dst = NULL;
}
#endif
static int RunModule(const char *modname)
{
PyObject *module, *runpy, *runmodule, *runargs, *result;
runpy = PyImport_ImportModule("runpy");
if (runpy == NULL) {
fprintf(stderr, "Could not import runpy module\n");
PyErr_Print();
return -1;
}
runmodule = PyObject_GetAttrString(runpy, "_run_module_as_main");
if (runmodule == NULL) {
fprintf(stderr, "Could not access runpy._run_module_as_main\n");
PyErr_Print();
Py_DECREF(runpy);
return -1;
}
module = PyUnicode_FromString(modname);
if (module == NULL) {
fprintf(stderr, "Could not convert module name to unicode\n");
PyErr_Print();
Py_DECREF(runpy);
Py_DECREF(runmodule);
return -1;
}
runargs = Py_BuildValue("(Oi)", module, 0);
if (runargs == NULL) {
fprintf(stderr,
"Could not create arguments for runpy._run_module_as_main\n");
PyErr_Print();
Py_DECREF(runpy);
Py_DECREF(runmodule);
Py_DECREF(module);
return -1;
}
result = PyObject_Call(runmodule, runargs, NULL);
if (result == NULL) {
PyErr_Print();
}
Py_DECREF(runpy);
Py_DECREF(runmodule);
Py_DECREF(module);
Py_DECREF(runargs);
if (result == NULL) {
return -1;
}
Py_DECREF(result);
return 0;
}
static int pymain(int argc, char** argv) {
PyStatus status = _PyRuntime_Initialize();
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
int i, sts = 1;
char* oldloc = NULL;
wchar_t** argv_copy = NULL;
/* We need a second copies, as Python might modify the first one. */
wchar_t** argv_copy2 = NULL;
char* entry_point_copy = NULL;
if (argc > 0) {
argv_copy = PyMem_RawMalloc(sizeof(wchar_t*) * argc);
argv_copy2 = PyMem_RawMalloc(sizeof(wchar_t*) * argc);
if (!argv_copy || !argv_copy2) {
fprintf(stderr, "out of memory\n");
goto error;
}
}
PyConfig config;
PyConfig_InitPythonConfig(&config);
config.pathconfig_warnings = 0; /* Suppress errors from getpath.c */
const char* bytes_warning = getenv(env_bytes_warning);
if (bytes_warning) {
config.bytes_warning = atoi(bytes_warning);
}
oldloc = _PyMem_RawStrdup(setlocale(LC_ALL, NULL));
if (!oldloc) {
fprintf(stderr, "out of memory\n");
goto error;
}
setlocale(LC_ALL, "");
for (i = 0; i < argc; i++) {
argv_copy[i] = Py_DecodeLocale(argv[i], NULL);
argv_copy2[i] = argv_copy[i];
if (!argv_copy[i]) {
fprintf(stderr, "Unable to decode the command line argument #%i\n",
i + 1);
argc = i;
goto error;
}
}
setlocale(LC_ALL, oldloc);
PyMem_RawFree(oldloc);
oldloc = NULL;
if (argc >= 1)
Py_SetProgramName(argv_copy[0]);
status = Py_InitializeFromConfig(&config);
PyConfig_Clear(&config);
if (PyStatus_Exception(status)) {
Py_ExitStatusException(status);
}
const char* entry_point = getenv(env_entry_point);
if (entry_point) {
entry_point_copy = strdup(entry_point);
if (!entry_point_copy) {
fprintf(stderr, "out of memory\n");
goto error;
}
} else {
entry_point_copy = GetPyMain();
}
if (entry_point_copy == NULL) {
fprintf(stderr, "No entry point, did you forget PY_MAIN?\n");
goto error;
}
if (entry_point_copy && !strcmp(entry_point_copy, ":main")) {
unsetenv(env_entry_point);
sts = Py_Main(argc, argv_copy);
free(entry_point_copy);
return sts;
}
Py_InitArgcArgv(argc, argv_copy);
PySys_SetArgv(argc, argv_copy);
{
PyObject* module = PyImport_ImportModule("library.python.runtime_py3.entry_points");
if (module == NULL) {
PyErr_Print();
} else {
PyObject* res = PyObject_CallMethod(module, "run_constructors", NULL);
if (res == NULL) {
PyErr_Print();
} else {
Py_DECREF(res);
}
Py_DECREF(module);
}
}
const char* module_name = entry_point_copy;
const char* func_name = NULL;
char *colon = strchr(entry_point_copy, ':');
if (colon != NULL) {
colon[0] = '\0';
func_name = colon + 1;
}
if (module_name[0] == '\0') {
module_name = "library.python.runtime_py3.entry_points";
}
if (!func_name) {
sts = RunModule(module_name);
} else {
PyObject* module = PyImport_ImportModule(module_name);
if (module == NULL) {
PyErr_Print();
} else {
PyObject* value = PyObject_CallMethod(module, func_name, NULL);
if (value == NULL) {
PyErr_Print();
} else {
Py_DECREF(value);
sts = 0;
}
Py_DECREF(module);
}
}
if (Py_FinalizeEx() < 0) {
sts = 120;
}
error:
free(entry_point_copy);
PyMem_RawFree(argv_copy);
if (argv_copy2) {
for (i = 0; i < argc; i++)
PyMem_RawFree(argv_copy2[i]);
PyMem_RawFree(argv_copy2);
}
PyMem_RawFree(oldloc);
return sts;
}
int (*mainptr)(int argc, char** argv) = pymain;
int main(int argc, char** argv) {
return mainptr(argc, argv);
}
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