New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45957 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 158 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                      S Y S T E M . V A L _ E N U M                       --
+--                                                                          --
+--                                 B o d y                                  --
+--                                                                          --
+--                            $Revision: 1.12 $
+--                                                                          --
+--          Copyright (C) 1992-2000, Free Software Foundation, Inc.         --
+--                                                                          --
+-- GNAT is free software;  you can  redistribute it  and/or modify it under --
+-- terms of the  GNU General Public License as published  by the Free Soft- --
+-- ware  Foundation;  either version 2,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
+-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, USA.                                                      --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+with Unchecked_Conversion;
+with System.Val_Util; use System.Val_Util;
+
+package body System.Val_Enum is
+
+   -------------------------
+   -- Value_Enumeration_8 --
+   -------------------------
+
+   function Value_Enumeration_8
+     (Names   : String;
+      Indexes : System.Address;
+      Num     : Natural;
+      Str     : String)
+      return    Natural
+   is
+      F : Natural;
+      L : Natural;
+      S : String (Str'Range) := Str;
+
+      type Natural_8 is range 0 .. 2 ** 7 - 1;
+      type Index_Table is array (Natural) of Natural_8;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+   begin
+      Normalize_String (S, F, L);
+
+      for J in 0 .. Num loop
+         if Names
+           (Natural (IndexesT (J)) ..
+            Natural (IndexesT (J + 1)) - 1) = S (F .. L)
+         then
+            return J;
+         end if;
+      end loop;
+
+      raise Constraint_Error;
+   end Value_Enumeration_8;
+
+   --------------------------
+   -- Value_Enumeration_16 --
+   --------------------------
+
+   function Value_Enumeration_16
+     (Names   : String;
+      Indexes : System.Address;
+      Num     : Natural;
+      Str     : String)
+      return    Natural
+   is
+      F : Natural;
+      L : Natural;
+      S : String (Str'Range) := Str;
+
+      type Natural_16 is range 0 .. 2 ** 15 - 1;
+      type Index_Table is array (Natural) of Natural_16;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+   begin
+      Normalize_String (S, F, L);
+
+      for J in 0 .. Num loop
+         if Names
+           (Natural (IndexesT (J)) ..
+            Natural (IndexesT (J + 1)) - 1) = S (F .. L)
+         then
+            return J;
+         end if;
+      end loop;
+
+      raise Constraint_Error;
+   end Value_Enumeration_16;
+
+   --------------------------
+   -- Value_Enumeration_32 --
+   --------------------------
+
+   function Value_Enumeration_32
+     (Names   : String;
+      Indexes : System.Address;
+      Num     : Natural;
+      Str     : String)
+      return    Natural
+   is
+      F : Natural;
+      L : Natural;
+      S : String (Str'Range) := Str;
+
+      type Natural_32 is range 0 .. 2 ** 31 - 1;
+      type Index_Table is array (Natural) of Natural_32;
+      type Index_Table_Ptr is access Index_Table;
+
+      function To_Index_Table_Ptr is
+        new Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+      IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+   begin
+      Normalize_String (S, F, L);
+
+      for J in 0 .. Num loop
+         if Names
+           (Natural (IndexesT (J)) ..
+            Natural (IndexesT (J + 1)) - 1) = S (F .. L)
+         then
+            return J;
+         end if;
+      end loop;
+
+      raise Constraint_Error;
+   end Value_Enumeration_32;
+
+end System.Val_Enum;