Fixed Set_Log_Levels on big-endian platforms.version_1.6

1 files changed, 23 insertions, 16 deletions

diff --git a/system_log.adb b/system_log.adb
index 2755501..e77c95d 100644
--- a/system_log.adb
+++ b/system_log.adb
@@ -1,5 +1,5 @@
 -- System_Log, a binding to the Unix syslog functions
--- Copyright 2009 - 2013 B. Persson, Bjorn@Rombobeorn.se
+-- Copyright 2009 - 2017 B. Persson, Bjorn@Rombobeorn.se
 --
 -- This library is free software: you can redistribute it and/or modify it
 -- under the terms of the GNU General Public License version 3, as published
@@ -7,12 +7,13 @@
 
 
 with Interfaces.C.Strings; use Interfaces.C; use Interfaces.C.Strings;
-with Ada.Unchecked_Conversion;
 
 package body System_Log is
 
 
-   Facility_Numbers : constant array(Log_Facility) of int :=
+   subtype Facility_Number is int range 0 .. 23 * 8;
+
+   Facility_Numbers : constant array(Log_Facility) of Facility_Number :=
       (Kernel   =>  0 * 8,   -- LOG_KERN
        User     =>  1 * 8,   -- LOG_USER
        Mail     =>  2 * 8,   -- LOG_MAIL
@@ -33,7 +34,9 @@ package body System_Log is
        Local6   => 22 * 8,   -- LOG_LOCAL6
        Local7   => 23 * 8);  -- LOG_LOCAL7
 
-   Level_Numbers : constant array(Log_Level) of int :=
+   subtype Level_Number is Natural range 0 .. 7;
+
+   Level_Numbers : constant array(Log_Level) of Level_Number :=
       (Emergency => 0,   -- LOG_EMERG
        Alert     => 1,   -- LOG_ALERT
        Critical  => 2,   -- LOG_CRIT
@@ -98,17 +101,21 @@ package body System_Log is
       function setlogmask(mask : int) return int;
       pragma Import(C, setlogmask, "setlogmask");
 
-      Bits : constant := Log_Level'Pos(Log_Level'Last) + 1;
-      type Mask is range 0 .. 2 ** Bits - 1;
-      for Mask'Size use Bits;
-      function To_Mask is new Ada.Unchecked_Conversion(Source => Log_Levels,
-                                                       Target => Mask);
-      function To_Levels is new Ada.Unchecked_Conversion(Source => Mask,
-                                                         Target => Log_Levels);
+      New_Mask : int := 0;
+      Old_Mask : unsigned;
    begin
-      -- Convert the input array of Boolean to a number, pass that to
-      -- setlogmask, and convert the output in the other direction.
-      Old_Levels := To_Levels(Mask(setlogmask(int(To_Mask(New_Levels)))));
+      -- Convert the input array of Boolean to a number.
+      for L in Log_Levels'Range loop
+         if New_Levels(L) then
+            New_Mask := New_Mask + 2 ** Level_Numbers(L);
+         end if;
+      end loop;
+      -- Pass that number to setlogmask and get the previous mask back.
+      Old_Mask := unsigned(setlogmask(New_Mask));
+      -- Convert the output number to an array of Boolean.
+      for L in Log_Levels'Range loop
+         Old_Levels(L) := (Old_Mask and 2 ** Level_Numbers(L)) /= 0;
+      end loop;
    end Set_Log_Levels;
 
 
@@ -131,7 +138,7 @@ package body System_Log is
 
    procedure Log(Level : in Log_Level; Message : in String) is
    begin
-      syslog(Level_Numbers(Level), Simple_Format, To_C(Message));
+      syslog(int(Level_Numbers(Level)), Simple_Format, To_C(Message));
    end Log;
 
 
@@ -140,7 +147,7 @@ package body System_Log is
                  Message  : in String)
    is
    begin
-      syslog(Facility_Numbers(Facility) + Level_Numbers(Level),
+      syslog(Facility_Numbers(Facility) + int(Level_Numbers(Level)),
              Simple_Format, To_C(Message));
    end Log;