godot/drivers/windows/dir_access_windows.cpp
Samuele Panzeri 59f04e16b8 Support long path in file access on windows
Changed windows file access file to check for path length and use the \\?\ long format when needed
2023-05-05 10:04:39 +02:00

388 lines
11 KiB
C++

/**************************************************************************/
/* dir_access_windows.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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#if defined(WINDOWS_ENABLED)
#include "dir_access_windows.h"
#include "core/os/memory.h"
#include "core/string/print_string.h"
#include <stdio.h>
#include <wchar.h>
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
/*
[03:57] <reduz> yessopie, so i don't havemak to rely on unicows
[03:58] <yessopie> reduz- yeah, all of the functions fail, and then you can call GetLastError () which will return 120
[03:58] <drumstick> CategoryApl, hehe, what? :)
[03:59] <CategoryApl> didn't Verona lead to some trouble
[03:59] <yessopie> 120 = ERROR_CALL_NOT_IMPLEMENTED
[03:59] <yessopie> (you can use that constant if you include winerr.h)
[03:59] <CategoryApl> well answer with winning a compo
[04:02] <yessopie> if ( SetCurrentDirectoryW ( L"." ) == FALSE && GetLastError () == ERROR_CALL_NOT_IMPLEMENTED ) { use ANSI }
*/
struct DirAccessWindowsPrivate {
HANDLE h; //handle for findfirstfile
WIN32_FIND_DATA f;
WIN32_FIND_DATAW fu; //unicode version
};
String DirAccessWindows::fix_path(String p_path) const {
String r_path = DirAccess::fix_path(p_path);
if (r_path.is_absolute_path() && !r_path.is_network_share_path() && r_path.length() > MAX_PATH) {
r_path = "\\\\?\\" + r_path.replace("/", "\\");
}
return r_path;
}
// CreateFolderAsync
Error DirAccessWindows::list_dir_begin() {
_cisdir = false;
_cishidden = false;
list_dir_end();
p->h = FindFirstFileExW((LPCWSTR)(String(current_dir + "\\*").utf16().get_data()), FindExInfoStandard, &p->fu, FindExSearchNameMatch, nullptr, 0);
if (p->h == INVALID_HANDLE_VALUE) {
return ERR_CANT_OPEN;
}
return OK;
}
String DirAccessWindows::get_next() {
if (p->h == INVALID_HANDLE_VALUE) {
return "";
}
_cisdir = (p->fu.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY);
_cishidden = (p->fu.dwFileAttributes & FILE_ATTRIBUTE_HIDDEN);
String name = String::utf16((const char16_t *)(p->fu.cFileName));
if (FindNextFileW(p->h, &p->fu) == 0) {
FindClose(p->h);
p->h = INVALID_HANDLE_VALUE;
}
return name;
}
bool DirAccessWindows::current_is_dir() const {
return _cisdir;
}
bool DirAccessWindows::current_is_hidden() const {
return _cishidden;
}
void DirAccessWindows::list_dir_end() {
if (p->h != INVALID_HANDLE_VALUE) {
FindClose(p->h);
p->h = INVALID_HANDLE_VALUE;
}
}
int DirAccessWindows::get_drive_count() {
return drive_count;
}
String DirAccessWindows::get_drive(int p_drive) {
if (p_drive < 0 || p_drive >= drive_count) {
return "";
}
return String::chr(drives[p_drive]) + ":";
}
Error DirAccessWindows::change_dir(String p_dir) {
GLOBAL_LOCK_FUNCTION
p_dir = fix_path(p_dir);
WCHAR real_current_dir_name[2048];
GetCurrentDirectoryW(2048, real_current_dir_name);
String prev_dir = String::utf16((const char16_t *)real_current_dir_name);
SetCurrentDirectoryW((LPCWSTR)(current_dir.utf16().get_data()));
bool worked = (SetCurrentDirectoryW((LPCWSTR)(p_dir.utf16().get_data())) != 0);
String base = _get_root_path();
if (!base.is_empty()) {
GetCurrentDirectoryW(2048, real_current_dir_name);
String new_dir = String::utf16((const char16_t *)real_current_dir_name).replace("\\", "/");
if (!new_dir.begins_with(base)) {
worked = false;
}
}
if (worked) {
GetCurrentDirectoryW(2048, real_current_dir_name);
current_dir = String::utf16((const char16_t *)real_current_dir_name);
current_dir = current_dir.replace("\\", "/");
}
SetCurrentDirectoryW((LPCWSTR)(prev_dir.utf16().get_data()));
return worked ? OK : ERR_INVALID_PARAMETER;
}
Error DirAccessWindows::make_dir(String p_dir) {
GLOBAL_LOCK_FUNCTION
p_dir = fix_path(p_dir);
if (p_dir.is_relative_path()) {
p_dir = current_dir.path_join(p_dir);
p_dir = fix_path(p_dir);
}
p_dir = p_dir.simplify_path().replace("/", "\\");
bool success;
int err;
success = CreateDirectoryW((LPCWSTR)(p_dir.utf16().get_data()), nullptr);
err = GetLastError();
if (success) {
return OK;
}
if (err == ERROR_ALREADY_EXISTS || err == ERROR_ACCESS_DENIED) {
return ERR_ALREADY_EXISTS;
}
return ERR_CANT_CREATE;
}
String DirAccessWindows::get_current_dir(bool p_include_drive) const {
String base = _get_root_path();
if (!base.is_empty()) {
String bd = current_dir.replace("\\", "/").replace_first(base, "");
if (bd.begins_with("/")) {
return _get_root_string() + bd.substr(1, bd.length());
} else {
return _get_root_string() + bd;
}
}
if (p_include_drive) {
return current_dir;
} else {
if (_get_root_string().is_empty()) {
int pos = current_dir.find(":");
if (pos != -1) {
return current_dir.substr(pos + 1);
}
}
return current_dir;
}
}
bool DirAccessWindows::file_exists(String p_file) {
GLOBAL_LOCK_FUNCTION
if (!p_file.is_absolute_path()) {
p_file = get_current_dir().path_join(p_file);
}
p_file = fix_path(p_file);
DWORD fileAttr;
fileAttr = GetFileAttributesW((LPCWSTR)(p_file.utf16().get_data()));
if (INVALID_FILE_ATTRIBUTES == fileAttr) {
return false;
}
return !(fileAttr & FILE_ATTRIBUTE_DIRECTORY);
}
bool DirAccessWindows::dir_exists(String p_dir) {
GLOBAL_LOCK_FUNCTION
if (p_dir.is_relative_path()) {
p_dir = get_current_dir().path_join(p_dir);
}
p_dir = fix_path(p_dir);
DWORD fileAttr;
fileAttr = GetFileAttributesW((LPCWSTR)(p_dir.utf16().get_data()));
if (INVALID_FILE_ATTRIBUTES == fileAttr) {
return false;
}
return (fileAttr & FILE_ATTRIBUTE_DIRECTORY);
}
Error DirAccessWindows::rename(String p_path, String p_new_path) {
if (p_path.is_relative_path()) {
p_path = get_current_dir().path_join(p_path);
}
p_path = fix_path(p_path);
if (p_new_path.is_relative_path()) {
p_new_path = get_current_dir().path_join(p_new_path);
}
p_new_path = fix_path(p_new_path);
// If we're only changing file name case we need to do a little juggling
if (p_path.to_lower() == p_new_path.to_lower()) {
if (dir_exists(p_path)) {
// The path is a dir; just rename
return ::_wrename((LPCWSTR)(p_path.utf16().get_data()), (LPCWSTR)(p_new_path.utf16().get_data())) == 0 ? OK : FAILED;
}
// The path is a file; juggle
WCHAR tmpfile[MAX_PATH];
if (!GetTempFileNameW((LPCWSTR)(fix_path(get_current_dir()).utf16().get_data()), nullptr, 0, tmpfile)) {
return FAILED;
}
if (!::ReplaceFileW(tmpfile, (LPCWSTR)(p_path.utf16().get_data()), nullptr, 0, nullptr, nullptr)) {
DeleteFileW(tmpfile);
return FAILED;
}
return ::_wrename(tmpfile, (LPCWSTR)(p_new_path.utf16().get_data())) == 0 ? OK : FAILED;
} else {
if (file_exists(p_new_path)) {
if (remove(p_new_path) != OK) {
return FAILED;
}
}
return ::_wrename((LPCWSTR)(p_path.utf16().get_data()), (LPCWSTR)(p_new_path.utf16().get_data())) == 0 ? OK : FAILED;
}
}
Error DirAccessWindows::remove(String p_path) {
if (p_path.is_relative_path()) {
p_path = get_current_dir().path_join(p_path);
}
p_path = fix_path(p_path);
DWORD fileAttr;
fileAttr = GetFileAttributesW((LPCWSTR)(p_path.utf16().get_data()));
if (INVALID_FILE_ATTRIBUTES == fileAttr) {
return FAILED;
}
if ((fileAttr & FILE_ATTRIBUTE_DIRECTORY)) {
return ::_wrmdir((LPCWSTR)(p_path.utf16().get_data())) == 0 ? OK : FAILED;
} else {
return ::_wunlink((LPCWSTR)(p_path.utf16().get_data())) == 0 ? OK : FAILED;
}
}
uint64_t DirAccessWindows::get_space_left() {
uint64_t bytes = 0;
if (!GetDiskFreeSpaceEx(nullptr, (PULARGE_INTEGER)&bytes, nullptr, nullptr)) {
return 0;
}
// This is either 0 or a value in bytes.
return bytes;
}
String DirAccessWindows::get_filesystem_type() const {
String path = fix_path(const_cast<DirAccessWindows *>(this)->get_current_dir());
int unit_end = path.find(":");
ERR_FAIL_COND_V(unit_end == -1, String());
String unit = path.substr(0, unit_end + 1) + "\\";
if (path.is_network_share_path()) {
return "Network Share";
}
WCHAR szVolumeName[100];
WCHAR szFileSystemName[10];
DWORD dwSerialNumber = 0;
DWORD dwMaxFileNameLength = 0;
DWORD dwFileSystemFlags = 0;
if (::GetVolumeInformationW((LPCWSTR)(unit.utf16().get_data()),
szVolumeName,
sizeof(szVolumeName),
&dwSerialNumber,
&dwMaxFileNameLength,
&dwFileSystemFlags,
szFileSystemName,
sizeof(szFileSystemName)) == TRUE) {
return String::utf16((const char16_t *)szFileSystemName);
}
ERR_FAIL_V("");
}
DirAccessWindows::DirAccessWindows() {
p = memnew(DirAccessWindowsPrivate);
p->h = INVALID_HANDLE_VALUE;
current_dir = ".";
#ifdef UWP_ENABLED
Windows::Storage::StorageFolder ^ install_folder = Windows::ApplicationModel::Package::Current->InstalledLocation;
change_dir(install_folder->Path->Data());
#else
DWORD mask = GetLogicalDrives();
for (int i = 0; i < MAX_DRIVES; i++) {
if (mask & (1 << i)) { //DRIVE EXISTS
drives[drive_count] = 'A' + i;
drive_count++;
}
}
change_dir(".");
#endif
}
DirAccessWindows::~DirAccessWindows() {
list_dir_end();
memdelete(p);
}
#endif //windows DirAccess support