| ------------------------------------------------------------------------------ |
| -- -- |
| -- GNAT COMPILER COMPONENTS -- |
| -- -- |
| -- P R J . U T I L -- |
| -- -- |
| -- S p e c -- |
| -- -- |
| -- $Revision$ |
| -- -- |
| -- 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. -- |
| -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- |
| -- -- |
| ------------------------------------------------------------------------------ |
| -- |
| -- Utilities when using project files. |
| |
| with GNAT.OS_Lib; use GNAT.OS_Lib; |
| with Types; use Types; |
| |
| package Prj.Util is |
| |
| function Value_Of |
| (Variable : Variable_Value; |
| Default : String) |
| return String; |
| -- Get the value of a single string variable. If Variable is |
| -- Nil_Variable_Value, is a string list or is defaulted, return Default. |
| |
| function Value_Of |
| (Index : Name_Id; |
| In_Array : Array_Element_Id) |
| return Name_Id; |
| -- Get a single string array component. |
| -- Returns No_Name if there is no component Index (case sensitive), |
| -- if In_Array is null, or if the component is a String list. |
| |
| function Value_Of |
| (Index : Name_Id; |
| In_Array : Array_Element_Id) |
| return Variable_Value; |
| -- Get a string array component (single String or String list). |
| -- Returns Nil_Variable_Value if there is no component Index |
| -- (case sensitive), or if In_Array is null. |
| |
| function Value_Of |
| (Name : Name_Id; |
| Attribute_Or_Array_Name : Name_Id; |
| In_Package : Package_Id) |
| return Variable_Value; |
| -- In a specific package, |
| -- - if there exists an array Variable_Or_Array_Name with an index |
| -- Name, returns the corresponding component, |
| -- - otherwise if there is a attribute Attribute_Or_Array_Name, |
| -- returns this attribute, |
| -- - otherwise, returns Nil_Variable_Value. |
| -- If In_Package is null, returns Nil_Variable_Value. |
| |
| function Value_Of |
| (Index : Name_Id; |
| In_Array : Name_Id; |
| In_Arrays : Array_Id) |
| return Name_Id; |
| -- Get a string array component in an array of an array list. |
| -- Returns No_Name if there is no component Index (case sensitive), |
| -- if In_Arrays is null, if In_Array is not found in In_Arrays, |
| -- or if the component is a String list. |
| |
| function Value_Of |
| (Name : Name_Id; |
| In_Arrays : Array_Id) |
| return Array_Element_Id; |
| -- Returns a specified array in an array list. Returns No_Array_Element |
| -- if In_Arrays is null or if Name is not the name of an array in |
| -- In_Arrays. The caller must ensure that Name is in lower case. |
| |
| function Value_Of |
| (Name : Name_Id; |
| In_Packages : Package_Id) |
| return Package_Id; |
| -- Returns a specified package in a package list. Returns No_Package |
| -- if In_Packages is null or if Name is not the name of a package in |
| -- Package_List. The caller must ensure that Name is in lower case. |
| |
| function Value_Of |
| (Variable_Name : Name_Id; |
| In_Variables : Variable_Id) |
| return Variable_Value; |
| -- Returns a specified variable in a variable list. Returns null if |
| -- In_Variables is null or if Variable_Name is not the name of a |
| -- variable in In_Variables. Caller must ensure that Name is lower case. |
| |
| procedure Write_Str |
| (S : String; |
| Max_Length : Positive; |
| Separator : Character); |
| -- Output string S using Output.Write_Str. If S is too long to fit in |
| -- one line of Max_Length, cut it in several lines, using Separator as |
| -- the last character of each line, if possible. |
| |
| type Text_File is limited private; |
| -- Represents a text file. Default is invalid text file. |
| |
| function Is_Valid (File : Text_File) return Boolean; |
| -- Returns True if File designates an open text file that |
| -- has not yet been closed. |
| |
| procedure Open (File : out Text_File; Name : String); |
| -- Open a text file. If this procedure fails, File is invalid. |
| |
| function End_Of_File (File : Text_File) return Boolean; |
| -- Returns True if the end of the text file File has been |
| -- reached. Fails if File is invalid. |
| |
| procedure Get_Line |
| (File : Text_File; |
| Line : out String; |
| Last : out Natural); |
| -- Reads a line from an open text file. Fails if File is invalid. |
| |
| procedure Close (File : in out Text_File); |
| -- Close an open text file. File becomes invalid. |
| -- Fails if File is already invalid. |
| |
| private |
| |
| type Text_File_Data is record |
| FD : File_Descriptor := Invalid_FD; |
| Buffer : String (1 .. 1_000); |
| Buffer_Len : Natural; |
| Cursor : Natural := 0; |
| End_Of_File_Reached : Boolean := False; |
| end record; |
| |
| type Text_File is access Text_File_Data; |
| |
| end Prj.Util; |
