--|
--|Item: Ada PCTE Binding
--|$Revision: 0.2 $
--|$State: Prototype $
--|
--|The Version Description Document (VDD) included with this release provides
--|detailed information regarding the condition of the software.  The "User 
--|Feedback" section of the VDD describes how to obtain additional information.
--|
--|Distribution Statement "A", per DoD Directive 5230.24
--|Authorized for public release; distribution is unlimited.
--|
--|Copyright (c) 1992, Paramax Systems Corporation, Reston, Virginia 
--|Copyright is assigned to the U.S. Government, upon delivery thereto, 
--|in accordance with the DFAR Special Works Clause.
--|
--|Developed by:  Paramax Systems Corporation,
--|
--|This software, developed under the Software Technology for Adaptable,
--|Reliable Systems (STARS) program, is approved for release under 
--|Distribution "A" of the Scientific and Technical Information Program 
--|Classification Scheme (DoD Directive 5230.24) unless otherwise indicated.  
--|Sponsored by the U.S. Defense Advanced Research Projects Agency (DARPA) 
--|under contract F19628-88-D-0031, the STARS program is supported by the 
--|military services, SEI, and MITRE, with the U.S. Air Force as the executive 
--|contracting agent.
--|
--|Permission to use, copy, modify, and comment on this software and its
--|documentation for purposes stated under Distribution "A" and without fee
--|is hereby granted, provided that this notice appears in each whole or
--|partial copy.  This software retains Contractor indemnification to
--|the Government regarding copyrights pursuant to the above referenced
--|STARS contract.  The Government disclaims all responsibility against
--|liability, including costs and expenses for violation of proprietary
--|rights, or copyrights arising out of the creation or use of this
--|software.
--|
--|In addition, the Government, Paramax, and its subcontractors disclaim all 
--|warranties with regard to this software, including all implied warranties 
--|of merchantability and fitness, and in no event shall the Government, 
--|Paramax, or its subcontractor(s) be liable for any special, indirect or 
--|consequential damages or any damages whatsoever resulting from the loss of 
--|use, data, or profits, whether in action of contract, negligence or other 
--|tortious action, arising in connection with the use or performance of this 
--|software.
--|
--|$Log $
--|
--                         Version Information
--                         ^^^^^^^^^^^^^^^^^^^
--
-- PCTE - Ada Language Interface.
-- Version: 0.2.
-- Release Date: November 30, 1992.
-- Compiled under SUN OS 4.1.2 using SunAda 1.0
--
--
--                         General Information
--                         ^^^^^^^^^^^^^^^^^^^
--
-- This is an alpha release of the Paramax STARS Ada binding to Emeraude's
-- PCTE 1.5 using the ECMA PCTE Ada binding specifications.  The binding
-- is incomplete in this release.  See the Version Description Document
-- provided with this alpha release for information on which interfaces
-- have been implemented.  It is expected that future releases will
-- expand the number of interfaces implemented.  The interfaces defined
-- herein are subject to change.
--
-- For further information, contact the authors:
--
--
--                   Robert Smith
--                   Paramax Systems Corp.
--                   Valley Forge Labs
--                   70 E. Swedesford Road
--                   Paoli, PA. 19301
--                   smith@prc.unisys.com (current)
--                   smith@vfl.paramax.com (future)
--                   +1 215 648-2402
--
--                   Michael Horton
--                   Paramax Systems Corp.
--                   Valley Forge Labs
--                   70 E. Swedesford Road
--                   Paoli, PA. 19301
--                   horton@prc.unisys.com (current)
--                   horton@vfl.paramax.com (future)
--                   +1 215 648-2527
--
--
with Pcte;
with Pcte_discretionary;

package emer_conversion is

   -- This package contains common conversion routines for mapping
   -- ECMA Pcte data structures to Emeraude data structures.

   function emer_access_mode (
      ecma_access_rights : in Pcte_discretionary.object.access_rights)
       return standard.integer;

end emer_conversion;

package body emer_conversion is

   function emer_access_mode (
      ecma_access_rights : in Pcte_discretionary.object.access_rights)
      return standard.integer is

      use Pcte_discretionary.object;

      mode : standard.integer := 0;

   begin
      if ecma_access_rights (READ_ATTRIBUTES) = GRANTED or
         ecma_access_rights (READ_CONTENTS)   = GRANTED or
         ecma_access_rights (READ_LINKS)      = GRANTED or
         ecma_access_rights (NAVIGATE)        = GRANTED then

         -- ECMA does not seem to have the ability to distinguish
         -- group and other permissions from owner permissions, so
         -- we turn them all on.
         mode := 8#00400# +  -- owner read
                 8#00040# +  -- group read
                 8#00004#;   -- others read
      end if;

      if ecma_access_rights (APPEND_LINKS)     = GRANTED or
         ecma_access_rights (APPEND_IMPLICIT)  = GRANTED or
         ecma_access_rights (APPEND_CONTENTS)  = GRANTED or
         ecma_access_rights (WRITE_IMPLICIT)   = GRANTED or
         ecma_access_rights (WRITE_ATTRIBUTES) = GRANTED or
         ecma_access_rights (WRITE_LINKS)      = GRANTED or
         ecma_access_rights (WRITE_CONTENTS)   = GRANTED then

         -- this is probably not the correct setting; owner only write?
         mode := mode +
                 8#00200# +  -- owner write
                 8#00020# +  -- group write
                 8#00002#;   -- others write
      end if;

      if ecma_access_rights (EXECUTE)          = GRANTED or
         ecma_access_rights (EXPLOIT_SCHEMA)   = GRANTED then

         mode := mode +
                 8#00100# +
                 8#00010# +
                 8#00001#;
      end if;

      return mode;

   end emer_access_mode;

end emer_conversion;