cex

commit fa9721fc35ae7afa230f86ed6fbb10ba6c12a4f1
parent 722b5b5a8ad5624adae64d7ee057343501a8c71a
Author: Wim Dupont <wim@wimdupont.com>
Date:   Sat,  4 Apr 2026 21:22:50 +0200

redraw optimization

Diffstat:
M
cex.c
 | 
21
++++++++++++++-------

1 file changed, 14 insertions(+), 7 deletions(-)
diff --git a/cex.c b/cex.c
@@ -30,6 +30,7 @@ typedef struct _win_file {
 	char d_name[256];
 	unsigned char d_type;
 	bool selected;
+	bool link_valid;
 } WinFile;
 
 typedef struct _dir_win {
@@ -454,6 +455,7 @@ set_win_files(DirWin *dirwin)
 {
 	struct dirent *ent;
 	size_t count = 0, cap = 16;
+	char linkpath[PATH_MAX];
 	DIR *dir;
 
 	free_dirwin(dirwin);
@@ -487,7 +489,13 @@ set_win_files(DirWin *dirwin)
 		cpstr(dirwin->winfiles[count].d_name, ent->d_name);
 		dirwin->winfiles[count].d_type = ent->d_type;
 		dirwin->winfiles[count].selected = is_selected(dirwin, count);
-		(count)++;
+		if (ent->d_type == DT_LNK) {
+			get_fullpath(linkpath, dirwin, count);
+			dirwin->winfiles[count].link_valid = (linkpath[0] != '\0'
+				&& access(linkpath, F_OK) == 0);
+		} else
+			dirwin->winfiles[count].link_valid = TRUE;
+		count++;
 	}
 	closedir(dir);
 
@@ -560,7 +568,7 @@ print_win(DirWin *dirwin)
 		return;
 
 	size_t cplen, size = dirwin->maxx;
-	char *subs, name[size+1], sbuf[size+1], pathbuf[PATH_MAX];
+	char *subs, name[size+1], sbuf[size+1];
 	int sindex, y = 0, x = 1;
 
 	werase(dirwin->window);
@@ -611,7 +619,7 @@ print_win(DirWin *dirwin)
 				wattroff(dirwin->window, COLOR_PAIR(DIR_COLOR));
 				wattroff(dirwin->window, A_BOLD);
 			} else if (dirwin->winfiles[i].d_type == DT_LNK) {
-				if (access(get_fullpath(pathbuf, dirwin, i), F_OK) == 0) {
+				if (dirwin->winfiles[i].link_valid) {
 					wattron(dirwin->window, COLOR_PAIR(LN_COLOR));
 					mvwaddstr(dirwin->window, y, x, name);
 					wattroff(dirwin->window, COLOR_PAIR(LN_COLOR));
@@ -1777,13 +1785,12 @@ get_fullpath(char *buf, DirWin *dirwin, size_t index)
 {
 	index = MIN(index, dirwin->filecount-1);
 	index = MAX(index, 0);
-	size_t len;
 
 	if (strcmp(dirwin->path, "/") == 0)
 		snprintf(buf, PATH_MAX, "/%s", dirwin->winfiles[index].d_name);
-	else {
-		len = PATH_MAX + arrlen(dirwin->winfiles[index].d_name);
-		snprintf(buf, len, "%s/%s", dirwin->path, dirwin->winfiles[index].d_name);
+	else if (snprintf(buf, PATH_MAX, "%s/%s", dirwin->path,
+			dirwin->winfiles[index].d_name) >= PATH_MAX) {
+			buf[0] = '\0';
 	}
 
 	return buf;