Merge pull request #91100 from bruvzg/x_finks

Add symlink API support for Windows, expose symlink methods.

2 files changed, 63 insertions, 3 deletions

diff --git a/drivers/windows/dir_access_windows.cpp b/drivers/windows/dir_access_windows.cpp
index 43dd62cdf6..63ba6a6c96 100644
--- a/drivers/windows/dir_access_windows.cpp
+++ b/drivers/windows/dir_access_windows.cpp
@@ -396,6 +396,66 @@ bool DirAccessWindows::is_case_sensitive(const String &p_path) const {
 	}
 }
 
+bool DirAccessWindows::is_link(String p_file) {
+	String f = p_file;
+
+	if (!f.is_absolute_path()) {
+		f = get_current_dir().path_join(f);
+	}
+	f = fix_path(f);
+
+	DWORD attr = GetFileAttributesW((LPCWSTR)(f.utf16().get_data()));
+	if (attr == INVALID_FILE_ATTRIBUTES) {
+		return false;
+	}
+
+	return (attr & FILE_ATTRIBUTE_REPARSE_POINT);
+}
+
+String DirAccessWindows::read_link(String p_file) {
+	String f = p_file;
+
+	if (!f.is_absolute_path()) {
+		f = get_current_dir().path_join(f);
+	}
+	f = fix_path(f);
+
+	HANDLE hfile = CreateFileW((LPCWSTR)(f.utf16().get_data()), GENERIC_READ, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, nullptr);
+	if (hfile == INVALID_HANDLE_VALUE) {
+		return f;
+	}
+
+	DWORD ret = GetFinalPathNameByHandleW(hfile, nullptr, 0, VOLUME_NAME_DOS | FILE_NAME_NORMALIZED);
+	if (ret == 0) {
+		return f;
+	}
+	Char16String cs;
+	cs.resize(ret + 1);
+	GetFinalPathNameByHandleW(hfile, (LPWSTR)cs.ptrw(), ret, VOLUME_NAME_DOS | FILE_NAME_NORMALIZED);
+	CloseHandle(hfile);
+
+	return String::utf16((const char16_t *)cs.ptr(), ret).trim_prefix(R"(\\?\)");
+}
+
+Error DirAccessWindows::create_link(String p_source, String p_target) {
+	if (p_target.is_relative_path()) {
+		p_target = get_current_dir().path_join(p_target);
+	}
+
+	p_source = fix_path(p_source);
+	p_target = fix_path(p_target);
+
+	DWORD file_attr = GetFileAttributesW((LPCWSTR)(p_source.utf16().get_data()));
+	bool is_dir = (file_attr & FILE_ATTRIBUTE_DIRECTORY);
+
+	DWORD flags = ((is_dir) ? SYMBOLIC_LINK_FLAG_DIRECTORY : 0) | SYMBOLIC_LINK_FLAG_ALLOW_UNPRIVILEGED_CREATE;
+	if (CreateSymbolicLinkW((LPCWSTR)p_target.utf16().get_data(), (LPCWSTR)p_source.utf16().get_data(), flags) != 0) {
+		return OK;
+	} else {
+		return FAILED;
+	}
+}
+
 DirAccessWindows::DirAccessWindows() {
 	p = memnew(DirAccessWindowsPrivate);
 	p->h = INVALID_HANDLE_VALUE;
diff --git a/drivers/windows/dir_access_windows.h b/drivers/windows/dir_access_windows.h
index 576ba18d9a..46755cbf33 100644
--- a/drivers/windows/dir_access_windows.h
+++ b/drivers/windows/dir_access_windows.h
@@ -77,9 +77,9 @@ public:
 	virtual Error rename(String p_path, String p_new_path) override;
 	virtual Error remove(String p_path) override;
 
-	virtual bool is_link(String p_file) override { return false; };
-	virtual String read_link(String p_file) override { return p_file; };
-	virtual Error create_link(String p_source, String p_target) override { return FAILED; };
+	virtual bool is_link(String p_file) override;
+	virtual String read_link(String p_file) override;
+	virtual Error create_link(String p_source, String p_target) override;
 
 	uint64_t get_space_left() override;