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Support long path in file access on windows

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Changed windows file access file to check for path length and use the \\?\ long format when needed
This commit is contained in:
Samuele Panzeri
2023-05-05 02:12:55 +02:00
parent d023e51363
commit 59f04e16b8
6 changed files with 23 additions and 8 deletions
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15
drivers/windows/dir_access_windows.cpp
View File

@ -59,6 +59,14 @@ struct DirAccessWindowsPrivate {
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() {
@ -158,6 +166,7 @@ Error DirAccessWindows::make_dir(String p_dir) {
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("/", "\\");
@ -165,12 +174,6 @@ Error DirAccessWindows::make_dir(String p_dir) {
bool success;
int err;
if (!p_dir.is_network_share_path()) {
p_dir = "\\\\?\\" + p_dir;
// Add "\\?\" to the path to extend max. path length past 248, if it's not a network share UNC path.
// See https://msdn.microsoft.com/en-us/library/windows/desktop/aa363855(v=vs.85).aspx
}
success = CreateDirectoryW((LPCWSTR)(p_dir.utf16().get_data()), nullptr);
err = GetLastError();

3
drivers/windows/dir_access_windows.h
View File

@ -53,6 +53,9 @@ class DirAccessWindows : public DirAccess {
bool _cisdir = false;
bool _cishidden = false;
protected:
virtual String fix_path(String p_path) const override;
public:
virtual Error list_dir_begin() override; ///< This starts dir listing
virtual String get_next() override;

8
drivers/windows/file_access_windows.cpp
View File

@ -68,6 +68,14 @@ bool FileAccessWindows::is_path_invalid(const String &p_path) {
return invalid_files.has(fname);
}
String FileAccessWindows::fix_path(const String &p_path) const {
String r_path = FileAccess::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;
}
Error FileAccessWindows::open_internal(const String &p_path, int p_mode_flags) {
if (is_path_invalid(p_path)) {
#ifdef DEBUG_ENABLED

1
drivers/windows/file_access_windows.h
View File

@ -54,6 +54,7 @@ class FileAccessWindows : public FileAccess {
static HashSet<String> invalid_files;
public:
virtual String fix_path(const String &p_path) const override;
virtual Error open_internal(const String &p_path, int p_mode_flags) override; ///< open a file
virtual bool is_open() const override; ///< true when file is open