# HG changeset patch
# User Rik <rik@octave.org>
# Date 1362887038 28800
# Node ID 2a81ce01c383f6098a227c5b9a0ef01d61bfab37
# Parent  4ef7bd2d7e8d88401c2b6cbc7092940397478a93
Fix history() so that it shows all commands when called with no arguments.

* libinterp/interpfcn/oct-hist.cc(do_history): Correctly change input number
of history lines to display from negative value to positive value.  A negative
value is reserved for "display all".

diff -r 4ef7bd2d7e8d -r 2a81ce01c383 libinterp/interpfcn/oct-hist.cc
--- a/libinterp/interpfcn/oct-hist.cc	Sun Mar 10 02:39:06 2013 +0000
+++ b/libinterp/interpfcn/oct-hist.cc	Sat Mar 09 19:43:58 2013 -0800
@@ -141,7 +141,7 @@
 
   int nargin = args.length ();
 
-  // Number of history lines to show
+  // Number of history lines to show (-1 = all)
   int limit = -1;
 
   for (octave_idx_type i = 0; i < nargin; i++)
@@ -155,6 +155,8 @@
       else if (arg.is_numeric_type ())
         {
           limit = arg.int_value ();
+          if (limit < 0)
+            limit = -limit;
           continue;
         }
       else
@@ -210,7 +212,13 @@
           int tmp;
 
           if (sscanf (option.c_str (), "%d", &tmp) == 1)
-            limit = tmp;
+            {
+              if (tmp > 0)
+                limit = tmp;
+              else
+                limit = -tmp;
+            }
+          
           else
             {
               if (option.length () > 0 && option[0] == '-')
@@ -223,8 +231,8 @@
         }
     }
 
-  if (limit < 0)
-    limit = -limit;
+//  if (limit < 0)
+//    limit = -limit;
 
   hlist = command_history::list (limit, numbered_output);