aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.8.3/gcc/ada/s-imgwiu.adb
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.8.3/gcc/ada/s-imgwiu.adb')
-rw-r--r--gcc-4.8.3/gcc/ada/s-imgwiu.adb134
1 files changed, 134 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/s-imgwiu.adb b/gcc-4.8.3/gcc/ada/s-imgwiu.adb
new file mode 100644
index 000000000..62dd9c135
--- /dev/null
+++ b/gcc-4.8.3/gcc/ada/s-imgwiu.adb
@@ -0,0 +1,134 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- S Y S T E M . I M G _ W I U --
+-- --
+-- B o d y --
+-- --
+-- Copyright (C) 1992-2009, 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 3, 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. --
+-- --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
+-- --
+-- 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_WIU is
+
+ -----------------------------
+ -- Set_Image_Width_Integer --
+ -----------------------------
+
+ procedure Set_Image_Width_Integer
+ (V : Integer;
+ 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_Width_Unsigned (Unsigned (V), 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_Width_Unsigned (Unsigned (-V), 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_Width_Integer;
+
+ ------------------------------
+ -- Set_Image_Width_Unsigned --
+ ------------------------------
+
+ procedure Set_Image_Width_Unsigned
+ (V : Unsigned;
+ W : Integer;
+ S : out String;
+ P : in out Natural)
+ is
+ Start : constant Natural := P;
+ F, T : Natural;
+
+ procedure Set_Digits (T : Unsigned);
+ -- Set digits of absolute value of T
+
+ procedure Set_Digits (T : Unsigned) is
+ begin
+ if T >= 10 then
+ Set_Digits (T / 10);
+ P := P + 1;
+ S (P) := Character'Val (T mod 10 + Character'Pos ('0'));
+ else
+ P := P + 1;
+ S (P) := Character'Val (T + Character'Pos ('0'));
+ end if;
+ end Set_Digits;
+
+ -- Start of processing for Set_Image_Width_Unsigned
+
+ begin
+ Set_Digits (V);
+
+ -- Add leading spaces if required by width parameter
+
+ if P - Start < W then
+ F := P;
+ P := P + (W - (P - Start));
+ 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_Width_Unsigned;
+
+end System.Img_WIU;