st.c: fix scrollback to only go to end of buffer, fix hist buffer

1 files changed, 7 insertions, 3 deletions

diff --git a/st.c b/st.c
index c765947..86cf5a3 100644
--- a/st.c
+++ b/st.c
@@ -1107,11 +1107,16 @@ kscrollup(const Arg* a)
 	if (n < 0)
 		n = term.row + n;
 
-	if (term.scr <= HISTSIZE-n) {
+        if (term.scr <= term.histi-n) {
 		term.scr += n;
 		selscroll(0, n);
 		tfulldirt();
-	}
+	} else {
+                n = term.histi - term.scr;
+                term.scr = term.histi;
+                selscroll(0, n);
+                tfulldirt();
+        }
 }
 
 void
@@ -1779,7 +1784,6 @@ csihandle(void)
 				tclearregion(0, term.c.y+1, term.col-1,
 						term.row-1);
 			}
-                        term.histi=0;
 			break;
 		case 1: /* above */
 			if (term.c.y > 1)