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/* Main program when embedded in a UWP application on Windows */

#include "Python.h"

#include <string.h>

#define WIN32_LEAN_AND_MEAN

#include <Windows.h>

#include <shellapi.h>

#include <shlobj.h>

#include <string>

#include <appmodel.h>

#include <winrt\Windows.ApplicationModel.h>

#include <winrt\Windows.Storage.h>

#ifdef PYTHONW

#ifdef _DEBUG

const wchar_t *PROGNAME = L"pythonw_d.exe";

#else

const wchar_t *PROGNAME = L"pythonw.exe";

#endif

#else

#ifdef _DEBUG

const wchar_t *PROGNAME = L"python_d.exe";

#else

const wchar_t *PROGNAME = L"python.exe";

#endif

static std::wstring

get_package_family()

{

try {

UINT32 nameLength = MAX_PATH;

std::wstring name;

name.resize(nameLength);

DWORD rc = GetCurrentPackageFamilyName(&nameLength, name.data());

if (rc == ERROR_SUCCESS) {

name.resize(nameLength - 1);

return name;

}

else if (rc != ERROR_INSUFFICIENT_BUFFER) {

throw rc;

}

name.resize(nameLength);

rc = GetCurrentPackageFamilyName(&nameLength, name.data());

if (rc != ERROR_SUCCESS) {

throw rc;

}

name.resize(nameLength - 1);

return name;

}

catch (...) {

}

return std::wstring();

}

static std::wstring

get_user_base()

{

try {

const auto appData = winrt::Windows::Storage::ApplicationData::Current();

if (appData) {

const auto localCache = appData.LocalCacheFolder();

if (localCache) {

std::wstring path { localCache.Path().c_str() };

if (!path.empty()) {

return path + L"\\local-packages";

}

} catch (...) {

}

return std::wstring();

}

static std::wstring

get_package_home()

{

try {

UINT32 pathLength = MAX_PATH;

std::wstring path;

path.resize(pathLength);

DWORD rc = GetCurrentPackagePath(&pathLength, path.data());

if (rc == ERROR_SUCCESS) {

path.resize(pathLength - 1);

return path;

}

else if (rc != ERROR_INSUFFICIENT_BUFFER) {

throw rc;

}

path.resize(pathLength);

rc = GetCurrentPackagePath(&pathLength, path.data());

if (rc != ERROR_SUCCESS) {

throw rc;

}

path.resize(pathLength - 1);

return path;

}

catch (...) {

}

return std::wstring();

}

static PyStatus

set_process_name(PyConfig *config)

{

PyStatus status = PyStatus_Ok();

std::wstring executable;

const auto home = get_package_home();

const auto family = get_package_family();

if (!family.empty()) {

PWSTR localAppData;

if (SUCCEEDED(SHGetKnownFolderPath(FOLDERID_LocalAppData, 0,

NULL, &localAppData))) {

executable = std::wstring(localAppData)

+ L"\\Microsoft\\WindowsApps\\"

+ family

+ L"\\"

+ PROGNAME;

CoTaskMemFree(localAppData);

}

/* Only use module filename if we don't have a home */

if (home.empty() && executable.empty()) {

executable.resize(MAX_PATH);

while (true) {

DWORD len = GetModuleFileNameW(

NULL, executable.data(), (DWORD)executable.size());

if (len == 0) {

executable.clear();

break;

} else if (len == executable.size() &&

GetLastError() == ERROR_INSUFFICIENT_BUFFER) {

executable.resize(len * 2);

} else {

executable.resize(len);

break;

}

size_t i = executable.find_last_of(L"/\\");

if (i == std::wstring::npos) {

executable = PROGNAME;

} else {

executable.replace(i + 1, std::wstring::npos, PROGNAME);

}

if (!home.empty()) {

status = PyConfig_SetString(config, &config->home, home.c_str());

if (PyStatus_Exception(status)) {

return status;

}

const wchar_t *launcherPath = _wgetenv(L"__PYVENV_LAUNCHER__");

if (launcherPath) {

if (!executable.empty()) {

status = PyConfig_SetString(config, &config->base_executable,

executable.c_str());

if (PyStatus_Exception(status)) {

return status;

}

status = PyConfig_SetString(

config, &config->executable, launcherPath);

/* bpo-35873: Clear the environment variable to avoid it being

* inherited by child processes. */

_wputenv_s(L"__PYVENV_LAUNCHER__", L"");

} else if (!executable.empty()) {

status = PyConfig_SetString(

config, &config->executable, executable.c_str());

}

return status;

}

int

wmain(int argc, wchar_t **argv)

{

PyStatus status;

PyPreConfig preconfig;

PyConfig config;

const wchar_t *moduleName = NULL;

const wchar_t *p = wcsrchr(argv[0], L'\\');

if (!p) {

p = argv[0];

}

if (p) {

if (*p == L'\\') {

p++;

}

if (wcsnicmp(p, L"pip", 3) == 0) {

moduleName = L"pip";

} else if (wcsnicmp(p, L"idle", 4) == 0) {

moduleName = L"idlelib";

}

PyPreConfig_InitPythonConfig(&preconfig);

if (!moduleName) {

status = Py_PreInitializeFromArgs(&preconfig, argc, argv);

if (PyStatus_Exception(status)) {

goto fail_without_config;

}

PyConfig_InitPythonConfig(&config);

status = PyConfig_SetArgv(&config, argc, argv);

if (PyStatus_Exception(status)) {

goto fail;

}

if (moduleName) {

config.parse_argv = 0;

}

status = set_process_name(&config);

if (PyStatus_Exception(status)) {

goto fail;

}

p = _wgetenv(L"PYTHONUSERBASE");

if (!p || !*p) {

_wputenv_s(L"PYTHONUSERBASE", get_user_base().c_str());

}

if (moduleName) {

status = PyConfig_SetString(&config, &config.run_module, moduleName);

if (PyStatus_Exception(status)) {

goto fail;

}

status = PyConfig_SetString(&config, &config.run_filename, NULL);

if (PyStatus_Exception(status)) {

goto fail;

}

status = PyConfig_SetString(&config, &config.run_command, NULL);

if (PyStatus_Exception(status)) {

goto fail;

}

status = Py_InitializeFromConfig(&config);

if (PyStatus_Exception(status)) {

goto fail;

}

PyConfig_Clear(&config);

return Py_RunMain();

fail:

PyConfig_Clear(&config);

fail_without_config:

if (PyStatus_IsExit(status)) {

return status.exitcode;

}

assert(PyStatus_Exception(status));

Py_ExitStatusException(status);

/* Unreachable code */

return 0;

}

#ifdef PYTHONW

int WINAPI wWinMain(

HINSTANCE hInstance, /* handle to current instance */

HINSTANCE hPrevInstance, /* handle to previous instance */

LPWSTR lpCmdLine, /* pointer to command line */

int nCmdShow /* show state of window */

)

{

return wmain(__argc, __wargv);

}

#endif

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