Function cv_undo

extern/editline/src/chared.c:58–77

cv_undo(): * Handle state for the vi undo command */

 *	Handle state for the vi undo command
 */
protected void
cv_undo(EditLine *el)
{
	c_undo_t *vu = &el->el_chared.c_undo;
	c_redo_t *r = &el->el_chared.c_redo;
	size_t size;

	/* Save entire line for undo */
	size = (size_t)(el->el_line.lastchar - el->el_line.buffer);
	vu->len = (ssize_t)size;
	vu->cursor = (int)(el->el_line.cursor - el->el_line.buffer);
	(void)memcpy(vu->buf, el->el_line.buffer, size * sizeof(*vu->buf));

	/* save command info for redo */
	r->count = el->el_state.doingarg ? el->el_state.argument : 0;
	r->action = el->el_chared.c_vcmd.action;
	r->pos = r->buf;
	r->cmd = el->el_state.thiscmd;
	r->ch = el->el_state.thisch;
}

/* cv_yank():
 *	Save yank/delete data for paste