New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45960 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 107 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                              T R E E _ I O                               --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.5 $                              --
+--                                                                          --
+--          Copyright (C) 1992-1999 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 the routines used to read and write the tree files
+--  used by ASIS. Only the actual read and write routines are here. The open,
+--  create and close routines are elsewhere (in Osint in the compiler, and in
+--  the tree read driver for the tree read interface).
+
+with GNAT.OS_Lib; use GNAT.OS_Lib;
+with System;      use System;
+with Types;       use Types;
+
+package Tree_IO is
+
+   Tree_Format_Error : exception;
+   --  Raised if a format error is detected in the input file
+
+   procedure Tree_Read_Initialize (Desc : File_Descriptor);
+   --  Called to initialize reading of a tree file. This call must be made
+   --  before calls to Tree_Read_xx. No calls to Tree_Write_xx are permitted
+   --  after this call.
+
+   procedure Tree_Read_Data (Addr : Address; Length : Int);
+   --  Checks that the Length provided is the same as what has been provided
+   --  to the corresponding Tree_Write_Data from the current tree file,
+   --  Tree_Format_Error is raised if it is not the case. If Length is
+   --  correct and non zero, reads Length bytes of information into memory
+   --  starting at Addr from the current tree file.
+
+   procedure Tree_Read_Bool (B : out Boolean);
+   --  Reads a single boolean value. The boolean value must have been written
+   --  with a call to the Tree_Write_Bool procedure.
+
+   procedure Tree_Read_Char (C : out Character);
+   --  Reads a single character. The character must have been written with a
+   --  call to the Tree_Write_Char procedure.
+
+   procedure Tree_Read_Int (N : out Int);
+   --  Reads a single integer value. The integer must have been written with
+   --  a call to the Tree_Write_Int procedure.
+
+   procedure Tree_Read_Str (S : out String_Ptr);
+   --  Read string, allocate on heap, and return pointer to allocated string
+   --  which always has a lower bound of 1.
+
+   procedure Tree_Read_Terminate;
+   --  Called after reading all data, checks that the buffer pointers is at
+   --  the end of file, raising Tree_Format_Error if not.
+
+   procedure Tree_Write_Initialize (Desc : File_Descriptor);
+   --  Called to initialize writing of a tree file. This call must be made
+   --  before calls to Tree_Write_xx. No calls to Tree_Read_xx are permitted
+   --  after this call.
+
+   procedure Tree_Write_Data (Addr : Address; Length : Int);
+   --  Writes Length then, if Length is not null, Length bytes of data
+   --  starting at Addr to current tree file
+
+   procedure Tree_Write_Bool (B : Boolean);
+   --  Writes a single boolean value to the current tree file
+
+   procedure Tree_Write_Char (C : Character);
+   --  Writes a single character to the current tree file
+
+   procedure Tree_Write_Int (N : Int);
+   --  Writes a single integer value to the current tree file
+
+   procedure Tree_Write_Str (S : String_Ptr);
+   --  Write out string value referenced by S. Low bound must be 1.
+
+   procedure Tree_Write_Terminate;
+   --  Terminates writing of the file (flushing the buffer), but does not
+   --  close the file (the caller is responsible for closing the file).
+
+end Tree_IO;