New Language: Ada

From-SVN: r45957

1 files changed, 78 insertions, 0 deletions

diff --git a/gcc/ada/s-vallli.ads b/gcc/ada/s-vallli.ads
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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                       S Y S T E M . V A L _ L L I                        --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.9 $                              --
+--                                                                          --
+--   Copyright (C) 1992,1993,1994,1995,1996 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,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, 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. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains routines for scanning signed Long_Long_Integer
+--  values for use in Text_IO.Integer_IO, and the Value attribute.
+
+package System.Val_LLI is
+pragma Pure (Val_LLI);
+
+   function Scan_Long_Long_Integer
+     (Str  : String;
+      Ptr  : access Integer;
+      Max  : Integer)
+      return Long_Long_Integer;
+   --  This function scans the string starting at Str (Ptr.all) for a valid
+   --  integer according to the syntax described in (RM 3.5(43)). The substring
+   --  scanned extends no further than Str (Max). There are three cases for the
+   --  return:
+   --
+   --  If a valid integer is found after scanning past any initial spaces, then
+   --  Ptr.all is updated past the last character of the integer (but trailing
+   --  spaces are not scanned out).
+   --
+   --  If no valid integer is found, then Ptr.all points either to an initial
+   --  non-digit character, or to Max + 1 if the field is all spaces and the
+   --  exception Constraint_Error is raised.
+   --
+   --  If a syntactically valid integer is scanned, but the value is out of
+   --  range, or, in the based case, the base value is out of range or there
+   --  is an out of range digit, then Ptr.all points past the integer, and
+   --  Constraint_Error is raised.
+   --
+   --  Note: these rules correspond to the requirements for leaving the pointer
+   --  positioned in Text_Io.Get
+   --
+   --  Note: if Str is null, i.e. if Max is less than Ptr, then this is a
+   --  special case of an all-blank string, and Ptr is unchanged, and hence
+   --  is greater than Max as required in this case.
+
+   function Value_Long_Long_Integer (Str : String) return Long_Long_Integer;
+   --  Used in computing X'Value (Str) where X is a signed integer type whose
+   --  base range exceeds the base range of Integer. Str is the string argument
+   --  of the attribute. Constraint_Error is raised if the string is malformed,
+   --  or if the value is out of range.
+
+end System.Val_LLI;