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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- G N A T . C G I . D E B U G --
-- --
-- B o d y --
-- --
-- Copyright (C) 2000-2022, AdaCore --
-- --
-- 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Strings.Unbounded;
package body GNAT.CGI.Debug is
use Ada.Strings.Unbounded;
-- Define the abstract type which act as a template for all debug IO modes.
-- To create a new IO mode you must:
-- 1. create a new package spec
-- 2. create a new type derived from IO.Format
-- 3. implement all the abstract routines in IO
package IO is
type Format is abstract tagged null record;
function Output (Mode : Format'Class) return String;
function Variable
(Mode : Format;
Name : String;
Value : String) return String is abstract;
-- Returns variable Name and its associated value
function New_Line (Mode : Format) return String is abstract;
-- Returns a new line such as this concatenated between two strings
-- will display the strings on two lines.
function Title (Mode : Format; Str : String) return String is abstract;
-- Returns Str as a Title. A title must be alone and centered on a
-- line. Next output will be on the following line.
function Header
(Mode : Format;
Str : String) return String is abstract;
-- Returns Str as an Header. An header must be alone on its line. Next
-- output will be on the following line.
end IO;
----------------------
-- IO for HTML Mode --
----------------------
package HTML_IO is
-- See IO for comments about these routines
type Format is new IO.Format with null record;
function Variable
(IO : Format;
Name : String;
Value : String) return String;
function New_Line (IO : Format) return String;
function Title (IO : Format; Str : String) return String;
function Header (IO : Format; Str : String) return String;
end HTML_IO;
----------------------------
-- IO for Plain Text Mode --
----------------------------
package Text_IO is
-- See IO for comments about these routines
type Format is new IO.Format with null record;
function Variable
(IO : Format;
Name : String;
Value : String) return String;
function New_Line (IO : Format) return String;
function Title (IO : Format; Str : String) return String;
function Header (IO : Format; Str : String) return String;
end Text_IO;
--------------
-- Debug_IO --
--------------
package body IO is
------------
-- Output --
------------
function Output (Mode : Format'Class) return String is
Result : Unbounded_String;
begin
Result :=
To_Unbounded_String
(Title (Mode, "CGI complete runtime environment")
& Header (Mode, "CGI parameters:")
& New_Line (Mode));
for K in 1 .. Argument_Count loop
Result := Result
& Variable (Mode, Key (K), Value (K))
& New_Line (Mode);
end loop;
Result := Result
& New_Line (Mode)
& Header (Mode, "CGI environment variables (Metavariables):")
& New_Line (Mode);
for P in Metavariable_Name'Range loop
if Metavariable_Exists (P) then
Result := Result
& Variable (Mode,
Metavariable_Name'Image (P),
Metavariable (P))
& New_Line (Mode);
end if;
end loop;
return To_String (Result);
end Output;
end IO;
-------------
-- HTML_IO --
-------------
package body HTML_IO is
NL : constant String := [ASCII.LF];
function Bold (S : String) return String;
-- Returns S as an HTML bold string
function Italic (S : String) return String;
-- Returns S as an HTML italic string
----------
-- Bold --
----------
function Bold (S : String) return String is
begin
return "<b>" & S & "</b>";
end Bold;
------------
-- Header --
------------
function Header (IO : Format; Str : String) return String is
pragma Unreferenced (IO);
begin
return "<h2>" & Str & "</h2>" & NL;
end Header;
------------
-- Italic --
------------
function Italic (S : String) return String is
begin
return "<i>" & S & "</i>";
end Italic;
--------------
-- New_Line --
--------------
function New_Line (IO : Format) return String is
pragma Unreferenced (IO);
begin
return "<br>" & NL;
end New_Line;
-----------
-- Title --
-----------
function Title (IO : Format; Str : String) return String is
pragma Unreferenced (IO);
begin
return "<p align=center><font size=+2>" & Str & "</font></p>" & NL;
end Title;
--------------
-- Variable --
--------------
function Variable
(IO : Format;
Name : String;
Value : String) return String
is
pragma Unreferenced (IO);
begin
return Bold (Name) & " = " & Italic (Value);
end Variable;
end HTML_IO;
-------------
-- Text_IO --
-------------
package body Text_IO is
------------
-- Header --
------------
function Header (IO : Format; Str : String) return String is
begin
return "*** " & Str & New_Line (IO);
end Header;
--------------
-- New_Line --
--------------
function New_Line (IO : Format) return String is
pragma Unreferenced (IO);
begin
return String'(1 => ASCII.LF);
end New_Line;
-----------
-- Title --
-----------
function Title (IO : Format; Str : String) return String is
Spaces : constant Natural := (80 - Str'Length) / 2;
Indent : constant String (1 .. Spaces) := [others => ' '];
begin
return Indent & Str & New_Line (IO);
end Title;
--------------
-- Variable --
--------------
function Variable
(IO : Format;
Name : String;
Value : String) return String
is
pragma Unreferenced (IO);
begin
return " " & Name & " = " & Value;
end Variable;
end Text_IO;
-----------------
-- HTML_Output --
-----------------
function HTML_Output return String is
HTML : HTML_IO.Format;
begin
return IO.Output (Mode => HTML);
end HTML_Output;
-----------------
-- Text_Output --
-----------------
function Text_Output return String is
Text : Text_IO.Format;
begin
return IO.Output (Mode => Text);
end Text_Output;
end GNAT.CGI.Debug;
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