gcc/ada/s-imgint.adb

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT RUN-TIME COMPONENTS                         --
   4 --                                                                          --
   5 --                       S Y S T E M . I M G _ I N T                        --
   6 --                                                                          --
   7 --                                 B o d y                                  --
   8 --                                                                          --
   9 --          Copyright (C) 1992-2015, Free Software Foundation, Inc.         --
  10 --                                                                          --
  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 package body System.Img_Int is
  33
  34    procedure Set_Digits
  35      (T : Integer;
  36       S : in out String;
  37       P : in out Natural);
  38    --  Set digits of absolute value of T, which is zero or negative. We work
  39    --  with the negative of the value so that the largest negative number is
  40    --  not a special case.
  41
  42    -------------------
  43    -- Image_Integer --
  44    -------------------
  45
  46    procedure Image_Integer
  47      (V : Integer;
  48       S : in out String;
  49       P : out Natural)
  50    is
  51       pragma Assert (S'First = 1);
  52
  53    begin
  54       if V >= 0 then
  55          S (1) := ' ';
  56          P := 1;
  57       else
  58          P := 0;
  59       end if;
  60
  61       Set_Image_Integer (V, S, P);
  62    end Image_Integer;
  63
  64    ----------------
  65    -- Set_Digits --
  66    ----------------
  67
  68    procedure Set_Digits
  69      (T : Integer;
  70       S : in out String;
  71       P : in out Natural)
  72    is
  73    begin
  74       if T <= -10 then
  75          Set_Digits (T / 10, S, P);
  76          P := P + 1;
  77          S (P) := Character'Val (48 - (T rem 10));
  78       else
  79          P := P + 1;
  80          S (P) := Character'Val (48 - T);
  81       end if;
  82    end Set_Digits;
  83
  84    -----------------------
  85    -- Set_Image_Integer --
  86    -----------------------
  87
  88    procedure Set_Image_Integer
  89      (V : Integer;
  90       S : in out String;
  91       P : in out Natural)
  92    is
  93    begin
  94       if V >= 0 then
  95          Set_Digits (-V, S, P);
  96       else
  97          P := P + 1;
  98          S (P) := '-';
  99          Set_Digits (V, S, P);
 100       end if;
 101    end Set_Image_Integer;
 102
 103 end System.Img_Int;