gcc/ada/prj-util.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                         GNAT COMPILER COMPONENTS                         --
   4 --                                                                          --
   5 --                              P R J . U T I L                             --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2001-2007, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 2,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
  17 -- for  more details.  You should have  received  a copy of the GNU General --
  18 -- Public License  distributed with GNAT;  see file COPYING.  If not, write --
  19 -- to  the  Free Software Foundation,  51  Franklin  Street,  Fifth  Floor, --
  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- GNAT was originally developed  by the GNAT team at  New York University. --
  23 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  24 --                                                                          --
  25 ------------------------------------------------------------------------------
  26
  27 --  Utilities for use in processing project files
  28
  29 package Prj.Util is
  30
  31    function Executable_Of
  32      (Project  : Project_Id;
  33       In_Tree  : Project_Tree_Ref;
  34       Main     : File_Name_Type;
  35       Index    : Int;
  36       Ada_Main : Boolean := True) return File_Name_Type;
  37    --  Return the value of the attribute Builder'Executable for file Main in
  38    --  the project Project, if it exists. If there is no attribute Executable
  39    --  for Main, remove the suffix from Main; then, if the attribute
  40    --  Executable_Suffix is specified, add this suffix, otherwise add the
  41    --  standard executable suffix for the platform.
  42
  43    function Value_Of
  44      (Variable : Variable_Value;
  45       Default  : String) return String;
  46    --  Get the value of a single string variable. If Variable is
  47    --  Nil_Variable_Value, is a string list or is defaulted, return Default.
  48
  49    function Value_Of
  50      (Index    : Name_Id;
  51       In_Array : Array_Element_Id;
  52       In_Tree  : Project_Tree_Ref) return Name_Id;
  53    --  Get a single string array component. Returns No_Name if there is no
  54    --  component Index, if In_Array is null, or if the component is a String
  55    --  list. Depending on the attribute (only attributes may be associative
  56    --  arrays) the index may or may not be case sensitive. If the index is not
  57    --  case sensitive, it is first set to lower case before the search in the
  58    --  associative array.
  59
  60    function Value_Of
  61      (Index     : Name_Id;
  62       Src_Index : Int := 0;
  63       In_Array  : Array_Element_Id;
  64       In_Tree   : Project_Tree_Ref) return Variable_Value;
  65    --  Get a string array component (single String or String list). Returns
  66    --  Nil_Variable_Value if no component Index or if In_Array is null.
  67    --
  68    --  Depending on the attribute (only attributes may be associative arrays)
  69    --  the index may or may not be case sensitive. If the index is not case
  70    --  sensitive, it is first set to lower case before the search in the
  71    --  associative array.
  72
  73    function Value_Of
  74      (Name                    : Name_Id;
  75       Index                   : Int := 0;
  76       Attribute_Or_Array_Name : Name_Id;
  77       In_Package              : Package_Id;
  78       In_Tree                 : Project_Tree_Ref) return Variable_Value;
  79    --  In a specific package,
  80    --   - if there exists an array Attribute_Or_Array_Name with an index Name,
  81    --     returns the corresponding component (depending on the attribute, the
  82    --     index may or may not be case sensitive, see previous function),
  83    --   - otherwise if there is a single attribute Attribute_Or_Array_Name,
  84    --     returns this attribute,
  85    --   - otherwise, returns Nil_Variable_Value.
  86    --  If In_Package is null, returns Nil_Variable_Value.
  87
  88    function Value_Of
  89      (Index     : Name_Id;
  90       In_Array  : Name_Id;
  91       In_Arrays : Array_Id;
  92       In_Tree   : Project_Tree_Ref) return Name_Id;
  93    --  Get a string array component in an array of an array list. Returns
  94    --  No_Name if there is no component Index, if In_Arrays is null, if
  95    --  In_Array is not found in In_Arrays or if the component is a String list.
  96
  97    function Value_Of
  98      (Name      : Name_Id;
  99       In_Arrays : Array_Id;
 100       In_Tree   : Project_Tree_Ref) return Array_Element_Id;
 101    --  Returns a specified array in an array list. Returns No_Array_Element
 102    --  if In_Arrays is null or if Name is not the name of an array in
 103    --  In_Arrays. The caller must ensure that Name is in lower case.
 104
 105    function Value_Of
 106      (Name        : Name_Id;
 107       In_Packages : Package_Id;
 108       In_Tree     : Project_Tree_Ref) return Package_Id;
 109    --  Returns a specified package in a package list. Returns No_Package if
 110    --  In_Packages is null or if Name is not the name of a package in
 111    --  Package_List. The caller must ensure that Name is in lower case.
 112
 113    function Value_Of
 114      (Variable_Name : Name_Id;
 115       In_Variables  : Variable_Id;
 116       In_Tree       : Project_Tree_Ref) return Variable_Value;
 117    --  Returns a specified variable in a variable list. Returns null if
 118    --  In_Variables is null or if Variable_Name is not the name of a
 119    --  variable in In_Variables. Caller must ensure that Name is lower case.
 120
 121    procedure Write_Str
 122      (S          : String;
 123       Max_Length : Positive;
 124       Separator  : Character);
 125    --  Output string S using Output.Write_Str. If S is too long to fit in
 126    --  one line of Max_Length, cut it in several lines, using Separator as
 127    --  the last character of each line, if possible.
 128
 129    type Text_File is limited private;
 130    --  Represents a text file. Default is invalid text file
 131
 132    function Is_Valid (File : Text_File) return Boolean;
 133    --  Returns True if File designates an open text file that
 134    --  has not yet been closed.
 135
 136    procedure Open (File : out Text_File; Name : String);
 137    --  Open a text file. If this procedure fails, File is invalid
 138
 139    function End_Of_File (File : Text_File) return Boolean;
 140    --  Returns True if the end of the text file File has been reached. Fails if
 141    --  File is invalid.
 142
 143    procedure Get_Line
 144      (File : Text_File;
 145       Line : out String;
 146       Last : out Natural);
 147    --  Reads a line from an open text file. Fails if File is invalid
 148
 149    procedure Close (File : in out Text_File);
 150    --  Close an open text file. File becomes invalid. Fails if File is already
 151    --  invalid.
 152
 153 private
 154
 155    type Text_File_Data is record
 156       FD                  : File_Descriptor := Invalid_FD;
 157       Buffer              : String (1 .. 1_000);
 158       Buffer_Len          : Natural;
 159       Cursor              : Natural := 0;
 160       End_Of_File_Reached : Boolean := False;
 161    end record;
 162
 163    type Text_File is access Text_File_Data;
 164
 165 end Prj.Util;