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#include <Python.h>

#include <windows.h>

#include <appmodel.h>

#include "helpers.h"

extern "C" {

PyObject *coinitialize(PyObject *, PyObject *args, PyObject *kwargs) {

HRESULT hr = CoInitializeEx(NULL, COINIT_APARTMENTTHREADED);

if (FAILED(hr)) {

PyErr_SetFromWindowsErr(hr);

return NULL;

}

Py_RETURN_NONE;

}

static void _invalid_parameter(

const wchar_t * expression,

const wchar_t * function,

const wchar_t * file,

unsigned int line,

uintptr_t pReserved

) { }

PyObject *fd_supports_vt100(PyObject *, PyObject *args, PyObject *kwargs) {

static const char * keywords[] = {"fd", NULL};

int fd;

if (!PyArg_ParseTupleAndKeywords(args, kwargs, "i:fd_supports_vt100", keywords, &fd)) {

return NULL;

}

PyObject *r = NULL;

HANDLE h;

DWORD mode;

const DWORD expect_flags = ENABLE_PROCESSED_OUTPUT | ENABLE_VIRTUAL_TERMINAL_PROCESSING;

auto handler = _set_thread_local_invalid_parameter_handler(_invalid_parameter);

h = (HANDLE)_get_osfhandle(fd);

_set_thread_local_invalid_parameter_handler(handler);

if (GetConsoleMode(h, &mode)) {

if ((mode & expect_flags) == expect_flags) {

r = Py_GetConstant(Py_CONSTANT_TRUE);

} else {

r = Py_GetConstant(Py_CONSTANT_FALSE);

}

} else {

PyErr_SetFromWindowsErr(0);

}

return r;

}

PyObject *date_as_str(PyObject *, PyObject *, PyObject *) {

wchar_t buffer[256];

DWORD cch = GetDateFormatEx(

LOCALE_NAME_INVARIANT,

NULL,

L"yyyyMMdd",

buffer,

sizeof(buffer) / sizeof(buffer[0]),

NULL

);

if (!cch) {

PyErr_SetFromWindowsErr(0);

return NULL;

}

return PyUnicode_FromWideChar(buffer, cch - 1);

}

PyObject *datetime_as_str(PyObject *, PyObject *, PyObject *) {

wchar_t buffer[256];

DWORD cch = GetDateFormatEx(

LOCALE_NAME_INVARIANT,

NULL,

L"yyyyMMdd",

buffer,

sizeof(buffer) / sizeof(buffer[0]),

NULL

);

if (!cch) {

PyErr_SetFromWindowsErr(0);

return NULL;

}

cch -= 1;

cch += GetTimeFormatEx(

LOCALE_NAME_INVARIANT,

NULL,

L"HHmmss",

&buffer[cch],

sizeof(buffer) / sizeof(buffer[0]) - cch

);

return PyUnicode_FromWideChar(buffer, cch - 1);

}

PyObject *reg_rename_key(PyObject *, PyObject *args, PyObject *kwargs) {

static const char * keywords[] = {"handle", "name1", "name2", NULL};

PyObject *handle_obj;

wchar_t *name1 = NULL;

wchar_t *name2 = NULL;

if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OO&O&:reg_rename_key", keywords,

&handle_obj, as_utf16, &name1, as_utf16, &name2)) {

return NULL;

}

PyObject *r = NULL;

HKEY h;

if (PyLong_AsNativeBytes(handle_obj, &h, sizeof(h), -1) >= 0) {

int err = (int)RegRenameKey(h, name1, name2);

if (!err) {

r = Py_GetConstant(Py_CONSTANT_NONE);

} else {

PyErr_SetFromWindowsErr(err);

}

PyMem_Free(name1);

PyMem_Free(name2);

return r;

}

PyObject *get_current_package(PyObject *, PyObject *, PyObject *) {

wchar_t package_name[256];

UINT32 cch = sizeof(package_name) / sizeof(package_name[0]);

int err = GetCurrentPackageFamilyName(&cch, package_name);

switch (err) {

case ERROR_SUCCESS:

return PyUnicode_FromWideChar(package_name, cch ? cch - 1 : 0);

case APPMODEL_ERROR_NO_PACKAGE:

return Py_GetConstant(Py_CONSTANT_NONE);

default:

PyErr_SetFromWindowsErr(err);

return NULL;

}

PyObject *read_alias_package(PyObject *, PyObject *args, PyObject *kwargs) {

static const char * keywords[] = {"path", NULL};

wchar_t *path = NULL;

if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O&:read_alias_package", keywords,

as_utf16, &path)) {

return NULL;

}

HANDLE h = CreateFileW(path, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,

FILE_FLAG_OPEN_REPARSE_POINT | FILE_FLAG_BACKUP_SEMANTICS, NULL);

PyMem_Free(path);

if (h == INVALID_HANDLE_VALUE) {

PyErr_SetFromWindowsErr(0);

return NULL;

}

struct {

DWORD tag;

DWORD _reserved1;

DWORD _reserved2;

wchar_t package_name[256];

wchar_t nul;

} buffer;

DWORD nread;

if (!DeviceIoControl(h, FSCTL_GET_REPARSE_POINT, NULL, 0,

&buffer, sizeof(buffer), &nread, NULL)

// we expect our buffer to be too small, but we only want the package

&& GetLastError() != ERROR_MORE_DATA) {

PyErr_SetFromWindowsErr(0);

CloseHandle(h);

return NULL;

}

CloseHandle(h);

if (buffer.tag != IO_REPARSE_TAG_APPEXECLINK) {

return Py_GetConstant(Py_CONSTANT_NONE);

}

buffer.nul = 0;

return PyUnicode_FromWideChar(buffer.package_name, -1);

}

typedef LRESULT (*PSendMessageTimeoutW)(

HWND hWnd,

UINT Msg,

WPARAM wParam,

LPARAM lParam,

UINT fuFlags,

UINT uTimeout,

PDWORD_PTR lpdwResult

);

PyObject *broadcast_settings_change(PyObject *, PyObject *, PyObject *) {

// Avoid depending on user32 because it's so slow

HMODULE user32 = LoadLibraryExW(L"user32.dll", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);

if (!user32) {

PyErr_SetFromWindowsErr(0);

return NULL;

}

PSendMessageTimeoutW sm = (PSendMessageTimeoutW)GetProcAddress(user32, "SendMessageTimeoutW");

if (!sm) {

PyErr_SetFromWindowsErr(0);

FreeLibrary(user32);

return NULL;

}

// SendMessageTimeout needs special error handling

SetLastError(0);

LPARAM lParam = (LPARAM)L"Environment";

if (!(*sm)(

HWND_BROADCAST,

WM_SETTINGCHANGE,

NULL,

lParam,

SMTO_ABORTIFHUNG,

50,

NULL

)) {

int err = GetLastError();

if (!err) {

PyErr_SetString(PyExc_OSError, "Unspecified error");

} else {

PyErr_SetFromWindowsErr(err);

}

FreeLibrary(user32);

return NULL;

}

FreeLibrary(user32);

return Py_GetConstant(Py_CONSTANT_NONE);

}

// We load IsWow64Process2 dynamically to avoid breaking on earlier OS than we

// officially support. If the API doesn't exist, then we assume -64.

typedef BOOL (*PIsWow64Process2)(HANDLE, USHORT*, USHORT*);

PyObject *get_processor_architecture(PyObject *, PyObject *, PyObject *) {

USHORT dummy, machine = IMAGE_FILE_MACHINE_AMD64;

HMODULE kernel32 = GetModuleHandleW(L"kernel32.dll");

if (kernel32) {

PIsWow64Process2 isWow64Process2 = (PIsWow64Process2)GetProcAddress(kernel32, "IsWow64Process2");

if (!isWow64Process2 || !isWow64Process2(0, &dummy, &machine)) {

machine = IMAGE_FILE_MACHINE_AMD64;

}

switch (machine) {

case IMAGE_FILE_MACHINE_I386: return PyUnicode_FromString("-32");

case IMAGE_FILE_MACHINE_ARM64: return PyUnicode_FromString("-arm64");

}

return PyUnicode_FromString("-64");

}

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