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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . I M G _ L L B --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2005 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, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, 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. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with System.Unsigned_Types; use System.Unsigned_Types;
package body System.Img_LLB is
---------------------------------------
-- Set_Image_Based_Long_Long_Integer --
---------------------------------------
procedure Set_Image_Based_Long_Long_Integer
(V : Long_Long_Integer;
B : Natural;
W : Integer;
S : out String;
P : in out Natural)
is
Start : Natural;
begin
-- Positive case can just use the unsigned circuit directly
if V >= 0 then
Set_Image_Based_Long_Long_Unsigned
(Long_Long_Unsigned (V), B, W, S, P);
-- Negative case has to set a minus sign. Note also that we have to be
-- careful not to generate overflow with the largest negative number.
else
P := P + 1;
S (P) := ' ';
Start := P;
declare
pragma Suppress (Overflow_Check);
pragma Suppress (Range_Check);
begin
Set_Image_Based_Long_Long_Unsigned
(Long_Long_Unsigned (-V), B, W - 1, S, P);
end;
-- Set minus sign in last leading blank location. Because of the
-- code above, there must be at least one such location.
while S (Start + 1) = ' ' loop
Start := Start + 1;
end loop;
S (Start) := '-';
end if;
end Set_Image_Based_Long_Long_Integer;
----------------------------------------
-- Set_Image_Based_Long_Long_Unsigned --
----------------------------------------
procedure Set_Image_Based_Long_Long_Unsigned
(V : Long_Long_Unsigned;
B : Natural;
W : Integer;
S : out String;
P : in out Natural)
is
Start : constant Natural := P;
F, T : Natural;
BU : constant Long_Long_Unsigned := Long_Long_Unsigned (B);
Hex : constant array
(Long_Long_Unsigned range 0 .. 15) of Character :=
"0123456789ABCDEF";
procedure Set_Digits (T : Long_Long_Unsigned);
-- Set digits of absolute value of T
procedure Set_Digits (T : Long_Long_Unsigned) is
begin
if T >= BU then
Set_Digits (T / BU);
P := P + 1;
S (P) := Hex (T mod BU);
else
P := P + 1;
S (P) := Hex (T);
end if;
end Set_Digits;
-- Start of processing for Set_Image_Based_Long_Long_Unsigned
begin
if B >= 10 then
P := P + 1;
S (P) := '1';
end if;
P := P + 1;
S (P) := Character'Val (Character'Pos ('0') + B mod 10);
P := P + 1;
S (P) := '#';
Set_Digits (V);
P := P + 1;
S (P) := '#';
-- Add leading spaces if required by width parameter
if P - Start < W then
F := P;
P := Start + W;
T := P;
while F > Start loop
S (T) := S (F);
T := T - 1;
F := F - 1;
end loop;
for J in Start + 1 .. T loop
S (J) := ' ';
end loop;
end if;
end Set_Image_Based_Long_Long_Unsigned;
end System.Img_LLB;
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