compat/fsmonitor/fsm-*-win32: support long paths

Update wchar_t buffers to use MAX_LONG_PATH instead of MAX_PATH and call
xutftowcs_long_path() in the Win32 backend source files.

Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com>

Author: jeffhostetler

compat/fsmonitor/fsm-health-win32.c

@@ -32,7 +32,7 @@ struct fsm_health_data
 
 	struct wt_moved
 	{
-		wchar_t wpath[MAX_PATH + 1];
+		wchar_t wpath[MAX_LONG_PATH + 1];
 		BY_HANDLE_FILE_INFORMATION bhfi;
 	} wt_moved;
 };
@@ -141,8 +141,8 @@ static int has_worktree_moved(struct fsmonitor_daemon_state *state,
 		return 0;
 
 	case CTX_INIT:
-		if (xutftowcs_path(data->wt_moved.wpath,
-				   state->path_worktree_watch.buf) < 0) {
+		if (xutftowcs_long_path(data->wt_moved.wpath,
+					state->path_worktree_watch.buf) < 0) {
 			error(_("could not convert to wide characters: '%s'"),
 			      state->path_worktree_watch.buf);
 			return -1;

compat/fsmonitor/fsm-listen-win32.c

@@ -25,7 +25,7 @@ struct one_watch
 	DWORD count;
 
 	struct strbuf path;
-	wchar_t wpath_longname[MAX_PATH + 1];
+	wchar_t wpath_longname[MAX_LONG_PATH + 1];
 	DWORD wpath_longname_len;
 
 	HANDLE hDir;
@@ -128,8 +128,8 @@ static int normalize_path_in_utf8(wchar_t *wpath, DWORD wpath_len,
  */
 static void check_for_shortnames(struct one_watch *watch)
 {
-	wchar_t buf_in[MAX_PATH + 1];
-	wchar_t buf_out[MAX_PATH + 1];
+	wchar_t buf_in[MAX_LONG_PATH + 1];
+	wchar_t buf_out[MAX_LONG_PATH + 1];
 	wchar_t *last;
 	wchar_t *p;
 
@@ -194,8 +194,8 @@ static enum get_relative_result get_relative_longname(
 	const wchar_t *wpath, DWORD wpath_len,
 	wchar_t *wpath_longname, size_t bufsize_wpath_longname)
 {
-	wchar_t buf_in[2 * MAX_PATH + 1];
-	wchar_t buf_out[MAX_PATH + 1];
+	wchar_t buf_in[2 * MAX_LONG_PATH + 1];
+	wchar_t buf_out[MAX_LONG_PATH + 1];
 	DWORD root_len;
 	DWORD out_len;
 
@@ -296,10 +296,10 @@ static struct one_watch *create_watch(struct fsmonitor_daemon_state *state,
 		FILE_SHARE_WRITE | FILE_SHARE_READ | FILE_SHARE_DELETE;
 	HANDLE hDir;
 	DWORD len_longname;
-	wchar_t wpath[MAX_PATH + 1];
-	wchar_t wpath_longname[MAX_PATH + 1];
+	wchar_t wpath[MAX_LONG_PATH + 1];
+	wchar_t wpath_longname[MAX_LONG_PATH + 1];
 
-	if (xutftowcs_path(wpath, path) < 0) {
+	if (xutftowcs_long_path(wpath, path) < 0) {
 		error(_("could not convert to wide characters: '%s'"), path);
 		return NULL;
 	}
@@ -544,7 +544,7 @@ static int process_worktree_events(struct fsmonitor_daemon_state *state)
 	struct string_list cookie_list = STRING_LIST_INIT_DUP;
 	struct fsmonitor_batch *batch = NULL;
 	const char *p = watch->buffer;
-	wchar_t wpath_longname[MAX_PATH + 1];
+	wchar_t wpath_longname[MAX_LONG_PATH + 1];
 
 	/*
 	 * If the kernel gets more events than will fit in the kernel

compat/fsmonitor/fsm-path-utils-win32.c

@@ -67,16 +67,16 @@ static int check_remote_protocol(wchar_t *wpath)
  */
 int fsmonitor__get_fs_info(const char *path, struct fs_info *fs_info)
 {
-	wchar_t wpath[MAX_PATH];
-	wchar_t wfullpath[MAX_PATH];
+	wchar_t wpath[MAX_LONG_PATH];
+	wchar_t wfullpath[MAX_LONG_PATH];
 	size_t wlen;
 	UINT driveType;
 
 	/*
 	 * Do everything in wide chars because the drive letter might be
 	 * a multi-byte sequence.  See win32_has_dos_drive_prefix().
 	 */
-	if (xutftowcs_path(wpath, path) < 0) {
+	if (xutftowcs_long_path(wpath, path) < 0) {
 		return -1;
 	}
 
@@ -95,7 +95,7 @@ int fsmonitor__get_fs_info(const char *path, struct fs_info *fs_info)
 	 * slashes to backslashes.  This is essential to get GetDriveTypeW()
 	 * correctly handle some UNC "\\server\share\..." paths.
 	 */
-	if (!GetFullPathNameW(wpath, MAX_PATH, wfullpath, NULL)) {
+	if (!GetFullPathNameW(wpath, MAX_LONG_PATH, wfullpath, NULL)) {
 		return -1;
 	}