+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNAT COMPILER COMPONENTS --
--- --
--- S I N P U T . P --
--- --
--- B o d y --
--- --
--- $Revision: 1.1.16.1 $
--- --
--- Copyright (C) 1992-2001 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. --
--- --
--- GNAT was originally developed by the GNAT team at New York University. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
-with Ada.Unchecked_Conversion;
-
-with GNAT.OS_Lib; use GNAT.OS_Lib;
-with Namet; use Namet;
-with Opt; use Opt;
-with System; use System;
-
-package body Sinput.P is
-
- First : Boolean := True;
- -- Flag used when Load_Project_File is called the first time,
- -- to set Main_Source_File.
- -- The flag is reset to False at the first call to Load_Project_File
-
- -----------------------
- -- Load_Project_File --
- -----------------------
-
- function Load_Project_File (Path : String) return Source_File_Index is
- Src : Source_Buffer_Ptr;
- X : Source_File_Index;
- Lo : Source_Ptr;
- Hi : Source_Ptr;
-
- Source_File_FD : File_Descriptor;
- -- The file descriptor for the current source file. A negative value
- -- indicates failure to open the specified source file.
-
- Len : Integer;
- -- Length of file. Assume no more than 2 gigabytes of source!
-
- Actual_Len : Integer;
-
- Path_Id : Name_Id;
- File_Id : Name_Id;
-
- begin
- if Path = "" then
- return No_Source_File;
- end if;
-
- Source_File.Increment_Last;
- X := Source_File.Last;
-
- if First then
- Main_Source_File := X;
- First := False;
- end if;
-
- if X = Source_File.First then
- Lo := First_Source_Ptr;
- else
- Lo := Source_File.Table (X - 1).Source_Last + 1;
- end if;
-
- Name_Len := Path'Length;
- Name_Buffer (1 .. Name_Len) := Path;
- Path_Id := Name_Find;
- Name_Buffer (Name_Len + 1) := ASCII.NUL;
-
- -- Open the source FD, note that we open in binary mode, because as
- -- documented in the spec, the caller is expected to handle either
- -- DOS or Unix mode files, and there is no point in wasting time on
- -- text translation when it is not required.
-
- Source_File_FD := Open_Read (Name_Buffer'Address, Binary);
-
- if Source_File_FD = Invalid_FD then
- Source_File.Decrement_Last;
- return No_Source_File;
-
- end if;
-
- Len := Integer (File_Length (Source_File_FD));
-
- -- Set Hi so that length is one more than the physical length,
- -- allowing for the extra EOF character at the end of the buffer
-
- Hi := Lo + Source_Ptr (Len);
-
- -- Do the actual read operation
-
- declare
- subtype Actual_Source_Buffer is Source_Buffer (Lo .. Hi);
- -- Physical buffer allocated
-
- type Actual_Source_Ptr is access Actual_Source_Buffer;
- -- This is the pointer type for the physical buffer allocated
-
- Actual_Ptr : Actual_Source_Ptr := new Actual_Source_Buffer;
- -- And this is the actual physical buffer
-
- begin
- -- Allocate source buffer, allowing extra character at end for EOF
-
- -- Some systems (e.g. VMS) have file types that require one
- -- read per line, so read until we get the Len bytes or until
- -- there are no more characters.
-
- Hi := Lo;
- loop
- Actual_Len := Read (Source_File_FD, Actual_Ptr (Hi)'Address, Len);
- Hi := Hi + Source_Ptr (Actual_Len);
- exit when Actual_Len = Len or Actual_Len <= 0;
- end loop;
-
- Actual_Ptr (Hi) := EOF;
-
- -- Now we need to work out the proper virtual origin pointer to
- -- return. This is exactly Actual_Ptr (0)'Address, but we have
- -- to be careful to suppress checks to compute this address.
-
- declare
- pragma Suppress (All_Checks);
-
- function To_Source_Buffer_Ptr is new
- Ada.Unchecked_Conversion (Address, Source_Buffer_Ptr);
-
- begin
- Src := To_Source_Buffer_Ptr (Actual_Ptr (0)'Address);
- end;
- end;
-
- -- Read is complete, get time stamp and close file and we are done
-
- Close (Source_File_FD);
-
- -- Get the file name, without path information
-
- declare
- Index : Positive := Path'Last;
-
- begin
- while Index > Path'First loop
- exit when Path (Index - 1) = '/';
- exit when Path (Index - 1) = Directory_Separator;
- Index := Index - 1;
- end loop;
-
- Name_Len := Path'Last - Index + 1;
- Name_Buffer (1 .. Name_Len) := Path (Index .. Path'Last);
- File_Id := Name_Find;
- end;
-
- declare
- S : Source_File_Record renames Source_File.Table (X);
-
- begin
- S := (Debug_Source_Name => Path_Id,
- File_Name => File_Id,
- First_Mapped_Line => No_Line_Number,
- Full_File_Name => Path_Id,
- Full_Ref_Name => Path_Id,
- Identifier_Casing => Unknown,
- Instantiation => No_Location,
- Keyword_Casing => Unknown,
- Last_Source_Line => 1,
- License => Unknown,
- Lines_Table => null,
- Lines_Table_Max => 1,
- Logical_Lines_Table => null,
- Num_SRef_Pragmas => 0,
- Reference_Name => File_Id,
- Sloc_Adjust => 0,
- Source_Checksum => 0,
- Source_First => Lo,
- Source_Last => Hi,
- Source_Text => Src,
- Template => No_Source_File,
- Time_Stamp => Empty_Time_Stamp);
-
- Alloc_Line_Tables (S, Opt.Table_Factor * Alloc.Lines_Initial);
- S.Lines_Table (1) := Lo;
- end;
-
- return X;
- end Load_Project_File;
-
- --------------------------------
- -- Restore_Project_Scan_State --
- --------------------------------
-
- procedure Restore_Project_Scan_State
- (Saved_State : in Saved_Project_Scan_State)
- is
- begin
- Restore_Scan_State (Saved_State.Scan_State);
- Source := Saved_State.Source;
- Current_Source_File := Saved_State.Current_Source_File;
- end Restore_Project_Scan_State;
-
- -----------------------------
- -- Save_Project_Scan_State --
- -----------------------------
-
- procedure Save_Project_Scan_State
- (Saved_State : out Saved_Project_Scan_State)
- is
- begin
- Save_Scan_State (Saved_State.Scan_State);
- Saved_State.Source := Source;
- Saved_State.Current_Source_File := Current_Source_File;
- end Save_Project_Scan_State;
-
-end Sinput.P;
projects / msp430-gcc.git / blobdiff