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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

(cherry picked from commit 59f04e16b8)
This commit is contained in:
Samuele Panzeri 2023-05-05 02:12:55 +02:00 committed by Rémi Verschelde
parent a37f79124f
commit cf0bd389cc
No known key found for this signature in database
GPG Key ID: C3336907360768E1
6 changed files with 23 additions and 8 deletions
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2
core/io/dir_access.h
View File

@ -68,7 +68,7 @@ protected:
virtual String _get_root_string() const;
AccessType get_access_type() const;
String fix_path(String p_path) const;
virtual String fix_path(String p_path) const;
template <class T>
static Ref<DirAccess> _create_builtin() {

2
core/io/file_access.h
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@ -80,7 +80,7 @@ protected:
static void _bind_methods();
AccessType get_access_type() const;
String fix_path(const String &p_path) const;
virtual String fix_path(const String &p_path) const;
virtual Error open_internal(const String &p_path, int p_mode_flags) = 0; ///< open a file
virtual uint64_t _get_modified_time(const String &p_file) = 0;
virtual void _set_access_type(AccessType p_access);

15
drivers/windows/dir_access_windows.cpp
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@ -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