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users/17314: ensure an undo change number

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uniquely specifies a point in editing history by incrementing
the value returned by the variable.
This commit is contained in:
Peter Stephenson 2012-10-09 14:57:13 +00:00
parent 8d9cb7f42e
commit 0fda80344b
2 changed files with 22 additions and 11 deletions
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6
ChangeLog
View file

@ -1,5 +1,9 @@
2012-10-09 Peter Stephenson <pws@csr.com>
* users/17314: Src/Zle/zle_utils.c: ensure an undo change number
uniquely specifies a point in editing history by incrementing
the value returned by the variable.
* unposted: Src/builtin.c: fix trivial typo with "functions +T".
2012-10-07 Peter Stephenson <p.w.stephenson@ntlworld.com>
@ -248,5 +252,5 @@
*****************************************************
* This is used by the shell to define $ZSH_PATCHLEVEL
* $Revision: 1.5741 $
* $Revision: 1.5742 $
*****************************************************

27
Src/Zle/zle_utils.c
View file

@ -1520,23 +1520,25 @@ setlastline(void)
int
undo(char **args)
{
zlong last_change = (zlong)0;
zlong last_change;
if (*args)
{
last_change = zstrtol(*args, NULL, 0);
}
else
last_change = (zlong)-1;
handleundo();
do {
if(!curchange->prev)
struct change *prev = curchange->prev;
if(!prev)
return 1;
if (unapplychange(curchange->prev))
curchange = curchange->prev;
if (prev->changeno < last_change)
break;
if (unapplychange(prev))
curchange = prev;
else
break;
} while (*args ? curchange->changeno != last_change :
(curchange->flags & CH_PREV));
} while (last_change >= (zlong)0 || (curchange->flags & CH_PREV));
setlastline();
return 0;
}
@ -1660,6 +1662,11 @@ zlecallhook(char *name, char *arg)
zlong
get_undo_current_change(UNUSED(Param pm))
{
return undo_changeno;
/*
* 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;
}