Merge tag 'zsh-5.0.8-test-2' into debian

1 files changed, 28 insertions, 23 deletions

diff --git a/Src/Zle/zle_utils.c b/Src/Zle/zle_utils.c
index e4ab97a54..d1d320613 100644
--- a/Src/Zle/zle_utils.c
+++ b/Src/Zle/zle_utils.c
@@ -1288,7 +1288,7 @@ showmsg(char const *msg)
     p = unmetafy(umsg, &ulen);
     memset(&mbs, 0, sizeof mbs);
 
-    mb_metacharinit();
+    mb_charinit();
     while (ulen > 0) {
 	char const *n;
 	if (*p == '\n') {
@@ -1405,9 +1405,9 @@ static struct change *nextchanges, *endnextchanges;
 /**/
 zlong undo_changeno;
 
-/* If non-zero, the last increment to undo_changeno was for the variable */
+/* If positive, don't undo beyond this point */
 
-static int undo_set_by_variable;
+zlong undo_limitno;
 
 /**/
 void
@@ -1418,8 +1418,7 @@ initundo(void)
     curchange->prev = curchange->next = NULL;
     curchange->del = curchange->ins = NULL;
     curchange->dell = curchange->insl = 0;
-    curchange->changeno = undo_changeno = 0;
-    undo_set_by_variable = 0;
+    curchange->changeno = undo_changeno = undo_limitno = 0;
     lastline = zalloc((lastlinesz = linesz) * ZLE_CHAR_SIZE);
     ZS_memcpy(lastline, zleline, (lastll = zlell));
     lastcs = zlecs;
@@ -1545,7 +1544,6 @@ mkundoent(void)
 	ch->prev = NULL;
     }
     ch->changeno = ++undo_changeno;
-    undo_set_by_variable = 0;
     endnextchanges = ch;
 }
 
@@ -1580,12 +1578,13 @@ undo(char **args)
 	struct change *prev = curchange->prev;
 	if(!prev)
 	    return 1;
-	if (prev->changeno < last_change)
-	    break;
-	if (unapplychange(prev))
-	    curchange = prev;
-	else
+	if (prev->changeno <= last_change)
 	    break;
+	if (prev->changeno <= undo_limitno && !*args)
+	    return 1;
+	if (!unapplychange(prev) && last_change >= 0)
+	    unapplychange(prev);
+	curchange = prev;
     } while (last_change >= (zlong)0 || (curchange->flags & CH_PREV));
     setlastline();
     return 0;
@@ -1735,16 +1734,22 @@ zlecallhook(char *name, char *arg)
 zlong
 get_undo_current_change(UNUSED(Param pm))
 {
-    if (undo_set_by_variable) {
-	/* We were the last to increment this, doesn't need another one. */
-	return undo_changeno;
-    }
-    undo_set_by_variable = 1;
-    /*
-     * Increment the number in case a change is in progress;
-     * we don't want to back off what's already been done when
-     * we return to this change number.  This eliminates any
-     * problem about the point where a change is numbered.
-     */
-    return ++undo_changeno;
+    /* add entry for any pending changes */
+    mkundoent();
+    setlastline();
+    return undo_changeno;
+}
+
+/**/
+zlong
+get_undo_limit_change(UNUSED(Param pm))
+{
+    return undo_limitno;
+}
+
+/**/
+void
+set_undo_limit_change(UNUSED(Param pm), zlong value)
+{
+    undo_limitno = value;
 }