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jeremybenn |
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . I M G _ I N T --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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package body System.Img_Int is
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-------------------
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-- Image_Integer --
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-------------------
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procedure Image_Integer
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(V : Integer;
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S : in out String;
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P : out Natural)
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is
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pragma Assert (S'First = 1);
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procedure Set_Digits (T : Integer);
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-- Set digits of absolute value of T, which is zero or negative. We work
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-- with the negative of the value so that the largest negative number is
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-- not a special case.
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----------------
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-- Set_Digits --
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----------------
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procedure Set_Digits (T : Integer) is
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begin
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if T <= -10 then
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Set_Digits (T / 10);
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P := P + 1;
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S (P) := Character'Val (48 - (T rem 10));
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else
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P := P + 1;
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S (P) := Character'Val (48 - T);
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end if;
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end Set_Digits;
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-- Start of processing for Image_Integer
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begin
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P := 1;
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if V >= 0 then
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S (P) := ' ';
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Set_Digits (-V);
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else
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S (P) := '-';
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Set_Digits (V);
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end if;
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end Image_Integer;
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-----------------------
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-- Set_Image_Integer --
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-----------------------
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procedure Set_Image_Integer
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(V : Integer;
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S : in out String;
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P : in out Natural)
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is
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procedure Set_Digits (T : Integer);
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-- Set digits of absolute value of T, which is zero or negative. We work
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-- with the negative of the value so that the largest negative number is
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-- not a special case.
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----------------
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-- Set_Digits --
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----------------
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procedure Set_Digits (T : Integer) is
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begin
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if T <= -10 then
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Set_Digits (T / 10);
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P := P + 1;
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S (P) := Character'Val (48 - (T rem 10));
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else
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P := P + 1;
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S (P) := Character'Val (48 - T);
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end if;
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end Set_Digits;
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-- Start of processing for Set_Image_Integer
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begin
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if V >= 0 then
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Set_Digits (-V);
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else
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P := P + 1;
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S (P) := '-';
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Set_Digits (V);
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end if;
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end Set_Image_Integer;
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end System.Img_Int;
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