src/lib/gnat/s-imenne.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                  S Y S T E M . I M G _ E N U M _ N E W                   --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2000-2013, Free Software Foundation, Inc.         --
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  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 pragma Assertion_Policy (Statement_Assertions => Ignore);
  33
  34 with Ada.Unchecked_Conversion;
  35
  36 package body System.Img_Enum_New is
  37
  38    -------------------------
  39    -- Image_Enumeration_8 --
  40    -------------------------
  41
  42    procedure Image_Enumeration_8
  43      (Pos     : Natural;
  44       S       : in out String;
  45       P       : out Natural;
  46       Names   : String;
  47       Indexes : System.Address)
  48    is
  49       pragma Assert (S'First = 1);
  50
  51       type Natural_8 is range 0 .. 2 ** 7 - 1;
  52       type Index_Table is array (Natural) of Natural_8;
  53       type Index_Table_Ptr is access Index_Table;
  54
  55       function To_Index_Table_Ptr is
  56         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
  57
  58       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
  59
  60       Start : constant Natural := Natural (IndexesT (Pos));
  61       Next  : constant Natural := Natural (IndexesT (Pos + 1));
  62
  63    begin
  64       S (1 .. Next - Start) := Names (Start .. Next - 1);
  65       P := Next - Start;
  66    end Image_Enumeration_8;
  67
  68    --------------------------
  69    -- Image_Enumeration_16 --
  70    --------------------------
  71
  72    procedure Image_Enumeration_16
  73      (Pos     : Natural;
  74       S       : in out String;
  75       P       : out Natural;
  76       Names   : String;
  77       Indexes : System.Address)
  78    is
  79       pragma Assert (S'First = 1);
  80
  81       type Natural_16 is range 0 .. 2 ** 15 - 1;
  82       type Index_Table is array (Natural) of Natural_16;
  83       type Index_Table_Ptr is access Index_Table;
  84
  85       function To_Index_Table_Ptr is
  86         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
  87
  88       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
  89
  90       Start : constant Natural := Natural (IndexesT (Pos));
  91       Next  : constant Natural := Natural (IndexesT (Pos + 1));
  92
  93    begin
  94       S (1 .. Next - Start) := Names (Start .. Next - 1);
  95       P := Next - Start;
  96    end Image_Enumeration_16;
  97
  98    --------------------------
  99    -- Image_Enumeration_32 --
 100    --------------------------
 101
 102    procedure Image_Enumeration_32
 103      (Pos     : Natural;
 104       S       : in out String;
 105       P       : out Natural;
 106       Names   : String;
 107       Indexes : System.Address)
 108    is
 109       pragma Assert (S'First = 1);
 110
 111       type Natural_32 is range 0 .. 2 ** 31 - 1;
 112       type Index_Table is array (Natural) of Natural_32;
 113       type Index_Table_Ptr is access Index_Table;
 114
 115       function To_Index_Table_Ptr is
 116         new Ada.Unchecked_Conversion (System.Address, Index_Table_Ptr);
 117
 118       IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
 119
 120       Start : constant Natural := Natural (IndexesT (Pos));
 121       Next  : constant Natural := Natural (IndexesT (Pos + 1));
 122
 123    begin
 124       S (1 .. Next - Start) := Names (Start .. Next - 1);
 125       P := Next - Start;
 126    end Image_Enumeration_32;
 127
 128 end System.Img_Enum_New;