aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.2.1/gcc/ada/s-widenu.adb
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-widenu.adb')
-rw-r--r--gcc-4.2.1/gcc/ada/s-widenu.adb137
1 files changed, 137 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-widenu.adb b/gcc-4.2.1/gcc/ada/s-widenu.adb
new file mode 100644
index 000000000..9110c107c
--- /dev/null
+++ b/gcc-4.2.1/gcc/ada/s-widenu.adb
@@ -0,0 +1,137 @@
+------------------------------------------------------------------------------
+-- --
+-- GNAT RUN-TIME COMPONENTS --
+-- --
+-- S Y S T E M . W I D _ E N U M --
+-- --
+-- 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 Unchecked_Conversion;
+
+package body System.Wid_Enum is
+
+ -------------------------
+ -- Width_Enumeration_8 --
+ -------------------------
+
+ function Width_Enumeration_8
+ (Names : String;
+ Indexes : System.Address;
+ Lo, Hi : Natural)
+ return Natural
+ is
+ pragma Warnings (Off, Names);
+
+ W : Natural;
+
+ type Natural_8 is range 0 .. 2 ** 7 - 1;
+ type Index_Table is array (Natural) of Natural_8;
+ type Index_Table_Ptr is access Index_Table;
+
+ function To_Index_Table_Ptr is
+ new Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+ begin
+ W := 0;
+
+ for J in Lo .. Hi loop
+ W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J)));
+ end loop;
+
+ return W;
+ end Width_Enumeration_8;
+
+ --------------------------
+ -- Width_Enumeration_16 --
+ --------------------------
+
+ function Width_Enumeration_16
+ (Names : String;
+ Indexes : System.Address;
+ Lo, Hi : Natural)
+ return Natural
+ is
+ pragma Warnings (Off, Names);
+
+ W : Natural;
+
+ type Natural_16 is range 0 .. 2 ** 15 - 1;
+ type Index_Table is array (Natural) of Natural_16;
+ type Index_Table_Ptr is access Index_Table;
+
+ function To_Index_Table_Ptr is
+ new Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+ begin
+ W := 0;
+
+ for J in Lo .. Hi loop
+ W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J)));
+ end loop;
+
+ return W;
+ end Width_Enumeration_16;
+
+ --------------------------
+ -- Width_Enumeration_32 --
+ --------------------------
+
+ function Width_Enumeration_32
+ (Names : String;
+ Indexes : System.Address;
+ Lo, Hi : Natural)
+ return Natural
+ is
+ pragma Warnings (Off, Names);
+
+ W : Natural;
+
+ type Natural_32 is range 0 .. 2 ** 31 - 1;
+ type Index_Table is array (Natural) of Natural_32;
+ type Index_Table_Ptr is access Index_Table;
+
+ function To_Index_Table_Ptr is
+ new Unchecked_Conversion (System.Address, Index_Table_Ptr);
+
+ IndexesT : constant Index_Table_Ptr := To_Index_Table_Ptr (Indexes);
+
+ begin
+ W := 0;
+
+ for J in Lo .. Hi loop
+ W := Natural'Max (W, Natural (IndexesT (J + 1) - IndexesT (J)));
+ end loop;
+
+ return W;
+ end Width_Enumeration_32;
+
+end System.Wid_Enum;