Commit 4d14d97

Rian Hunter <rian+suckless-dev@thelig.ht>
2015-01-29 18:06:43
Fix crash due to wide characters
In tputc(), when a character wasn't large enough to fit on the current line, we would call tnewline() to place it on the next line. Unfortunately, we weren't resetting our glyph pointer and this caused memory corruption when a wide character (width == 2) was being written. This patch resets our glyph pointer after calls to tnewline().
master
1 parent 708b697
Changed files (1)
st.c
st.c
@@ -2673,13 +2673,16 @@ tputc(char *c, int len) {
 	if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
 		gp->mode |= ATTR_WRAP;
 		tnewline(1);
+		gp = &term.line[term.c.y][term.c.x];
 	}
 
 	if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col)
 		memmove(gp+1, gp, (term.col - term.c.x - 1) * sizeof(Glyph));
 
-	if(term.c.x+width > term.col)
+	if(term.c.x+width > term.col) {
 		tnewline(1);
+		gp = &term.line[term.c.y][term.c.x];
+	}
 
 	tsetchar(c, &term.c.attr, term.c.x, term.c.y);