------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- P R J . U T I L -- -- -- -- B o d y -- -- -- -- -- -- Copyright (C) 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_Deallocation; with Namet; use Namet; with Osint; with Output; use Output; with Stringt; use Stringt; package body Prj.Util is procedure Free is new Ada.Unchecked_Deallocation (Text_File_Data, Text_File); ----------- -- Close -- ----------- procedure Close (File : in out Text_File) is begin if File = null then Osint.Fail ("Close attempted on an invalid Text_File"); end if; Close (File.FD); Free (File); end Close; ----------------- -- End_Of_File -- ----------------- function End_Of_File (File : Text_File) return Boolean is begin if File = null then Osint.Fail ("End_Of_File attempted on an invalid Text_File"); end if; return File.End_Of_File_Reached; end End_Of_File; -------------- -- Get_Line -- -------------- procedure Get_Line (File : Text_File; Line : out String; Last : out Natural) is C : Character; procedure Advance; ------------- -- Advance -- ------------- procedure Advance is begin if File.Cursor = File.Buffer_Len then File.Buffer_Len := Read (FD => File.FD, A => File.Buffer'Address, N => File.Buffer'Length); if File.Buffer_Len = 0 then File.End_Of_File_Reached := True; return; else File.Cursor := 1; end if; else File.Cursor := File.Cursor + 1; end if; end Advance; -- Start of processing for Get_Line begin if File = null then Osint.Fail ("Get_Line attempted on an invalid Text_File"); end if; Last := Line'First - 1; if not File.End_Of_File_Reached then loop C := File.Buffer (File.Cursor); exit when C = ASCII.CR or else C = ASCII.LF; Last := Last + 1; Line (Last) := C; Advance; if File.End_Of_File_Reached then return; end if; exit when Last = Line'Last; end loop; if C = ASCII.CR or else C = ASCII.LF then Advance; if File.End_Of_File_Reached then return; end if; end if; if C = ASCII.CR and then File.Buffer (File.Cursor) = ASCII.LF then Advance; end if; end if; end Get_Line; -------------- -- Is_Valid -- -------------- function Is_Valid (File : Text_File) return Boolean is begin return File /= null; end Is_Valid; ---------- -- Open -- ---------- procedure Open (File : out Text_File; Name : in String) is FD : File_Descriptor; File_Name : String (1 .. Name'Length + 1); begin File_Name (1 .. Name'Length) := Name; File_Name (File_Name'Last) := ASCII.NUL; FD := Open_Read (Name => File_Name'Address, Fmode => GNAT.OS_Lib.Text); if FD = Invalid_FD then File := null; else File := new Text_File_Data; File.FD := FD; File.Buffer_Len := Read (FD => FD, A => File.Buffer'Address, N => File.Buffer'Length); if File.Buffer_Len = 0 then File.End_Of_File_Reached := True; else File.Cursor := 1; end if; end if; end Open; -------------- -- Value_Of -- -------------- function Value_Of (Variable : Variable_Value; Default : String) return String is begin if Variable.Kind /= Single or else Variable.Default or else Variable.Value = No_String then return Default; else String_To_Name_Buffer (Variable.Value); return Name_Buffer (1 .. Name_Len); end if; end Value_Of; function Value_Of (Index : Name_Id; In_Array : Array_Element_Id) return Name_Id is Current : Array_Element_Id := In_Array; Element : Array_Element; begin while Current /= No_Array_Element loop Element := Array_Elements.Table (Current); if Index = Element.Index then exit when Element.Value.Kind /= Single; exit when String_Length (Element.Value.Value) = 0; String_To_Name_Buffer (Element.Value.Value); return Name_Find; else Current := Element.Next; end if; end loop; return No_Name; end Value_Of; function Value_Of (Index : Name_Id; In_Array : Array_Element_Id) return Variable_Value is Current : Array_Element_Id := In_Array; Element : Array_Element; begin while Current /= No_Array_Element loop Element := Array_Elements.Table (Current); if Index = Element.Index then return Element.Value; else Current := Element.Next; end if; end loop; return Nil_Variable_Value; end Value_Of; function Value_Of (Name : Name_Id; Attribute_Or_Array_Name : Name_Id; In_Package : Package_Id) return Variable_Value is The_Array : Array_Element_Id; The_Attribute : Variable_Value := Nil_Variable_Value; begin if In_Package /= No_Package then -- First, look if there is an array element that fits The_Array := Value_Of (Name => Attribute_Or_Array_Name, In_Arrays => Packages.Table (In_Package).Decl.Arrays); The_Attribute := Value_Of (Index => Name, In_Array => The_Array); -- If there is no array element, look for a variable if The_Attribute = Nil_Variable_Value then The_Attribute := Value_Of (Variable_Name => Attribute_Or_Array_Name, In_Variables => Packages.Table (In_Package).Decl.Attributes); end if; end if; return The_Attribute; end Value_Of; function Value_Of (Index : Name_Id; In_Array : Name_Id; In_Arrays : Array_Id) return Name_Id is Current : Array_Id := In_Arrays; The_Array : Array_Data; begin while Current /= No_Array loop The_Array := Arrays.Table (Current); if The_Array.Name = In_Array then return Value_Of (Index, In_Array => The_Array.Value); else Current := The_Array.Next; end if; end loop; return No_Name; end Value_Of; function Value_Of (Name : Name_Id; In_Arrays : Array_Id) return Array_Element_Id is Current : Array_Id := In_Arrays; The_Array : Array_Data; begin while Current /= No_Array loop The_Array := Arrays.Table (Current); if The_Array.Name = Name then return The_Array.Value; else Current := The_Array.Next; end if; end loop; return No_Array_Element; end Value_Of; function Value_Of (Name : Name_Id; In_Packages : Package_Id) return Package_Id is Current : Package_Id := In_Packages; The_Package : Package_Element; begin while Current /= No_Package loop The_Package := Packages.Table (Current); exit when The_Package.Name /= No_Name and then The_Package.Name = Name; Current := The_Package.Next; end loop; return Current; end Value_Of; function Value_Of (Variable_Name : Name_Id; In_Variables : Variable_Id) return Variable_Value is Current : Variable_Id := In_Variables; The_Variable : Variable; begin while Current /= No_Variable loop The_Variable := Variable_Elements.Table (Current); if Variable_Name = The_Variable.Name then return The_Variable.Value; else Current := The_Variable.Next; end if; end loop; return Nil_Variable_Value; end Value_Of; --------------- -- Write_Str -- --------------- procedure Write_Str (S : String; Max_Length : Positive; Separator : Character) is First : Positive := S'First; Last : Natural := S'Last; begin -- Nothing to do for empty strings if S'Length > 0 then -- Start on a new line if current line is already longer than -- Max_Length. if Positive (Column) >= Max_Length then Write_Eol; end if; -- If length of remainder is longer than Max_Length, we need to -- cut the remainder in several lines. while Positive (Column) + S'Last - First > Max_Length loop -- Try the maximum length possible Last := First + Max_Length - Positive (Column); -- Look for last Separator in the line while Last >= First and then S (Last) /= Separator loop Last := Last - 1; end loop; -- If we do not find a separator, we output the maximum length -- possible. if Last < First then Last := First + Max_Length - Positive (Column); end if; Write_Line (S (First .. Last)); -- Set the beginning of the new remainder First := Last + 1; end loop; -- What is left goes to the buffer, without EOL Write_Str (S (First .. S'Last)); end if; end Write_Str; end Prj.Util;