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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G E T _ S P A R K _ X R E F S --
-- --
-- S p e c --
-- --
-- Copyright (C) 2011-2013, 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. 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 COPYING3. If not, go to --
-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- This package contains the function used to read SPARK cross-reference
-- information from an ALI file and populate the tables defined in package
-- SPARK_Xrefs with the result.
generic
-- These subprograms provide access to the ALI file. Locating, opening and
-- providing access to the ALI file is the callers' responsibility.
with function Getc return Character is <>;
-- Get next character, positioning the ALI file ready to read the following
-- character (equivalent to calling Nextc, then Skipc). If the end of file
-- is encountered, the value Types.EOF is returned.
with function Nextc return Character is <>;
-- Look at the next character, and return it, leaving the position of the
-- file unchanged, so that a subsequent call to Getc or Nextc will return
-- this same character. If the file is positioned at the end of file, then
-- Types.EOF is returned.
with procedure Skipc is <>;
-- Skip past the current character (which typically was read with Nextc),
-- and position to the next character, which will be returned by the next
-- call to Getc or Nextc.
procedure Get_SPARK_Xrefs;
-- Load SPARK cross-reference information from ALI file text format into
-- internal SPARK tables (SPARK_Xrefs.SPARK_Xref_Table,
-- SPARK_Xrefs.SPARK_Scope_Table and SPARK_Xrefs.SPARK_File_Table). On entry
-- the input file is positioned to the initial 'F' of the first SPARK specific
-- line in the ALI file. On return, the file is positioned either to the end
-- of file, or to the first character of the line following the SPARK specific
-- information (which will never start with an 'F').
--
-- If a format error is detected in the input, then an exception is raised
-- (Ada.IO_Exceptions.Data_Error), with the file positioned to the error.
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