[hackers] [st][PATCH] Do not mark as invalid UTF8 control codes

From: Roberto E. Vargas Caballero <k0ga_AT_shike2.com>
Date: Mon, 17 Aug 2015 11:29:34 +0200

wcwidth() returns -1 in all the non visible characters, but it doesn't
mind that they are incorrect. It only means that they are not printable.

---
 st.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/st.c b/st.c
index 1df4fde..35a840b 100644
--- a/st.c
+++ b/st.c
_AT_@ -2895,15 +2895,15 @@ tputc(Rune u)
 	int width, len;
 	Glyph *gp;
 
+	control = ISCONTROL(u);
 	len = utf8encode(u, c);
-	if ((width = wcwidth(u)) == -1) {
+	if (!control && (width = wcwidth(u)) == -1) {
 		memcpy(c, "\357\277\275", 4); /* UTF_INVALID */
 		width = 1;
 	}
 
 	if (IS_SET(MODE_PRINT))
 		tprinter(c, len);
-	control = ISCONTROL(u);
 
 	/*
 	 * STR sequence must be checked before anything else
-- 
2.1.4

Received on Mon Aug 17 2015 - 11:29:34 CEST