73 lines
3.3 KiB
Ada
73 lines
3.3 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- A D A . C O M M A N D _ L I N E . E N V I R O N M E N T --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1996-2009, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with System;
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package body Ada.Command_Line.Environment is
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-----------------------
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-- Environment_Count --
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-----------------------
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function Environment_Count return Natural is
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function Env_Count return Natural;
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pragma Import (C, Env_Count, "__gnat_env_count");
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begin
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return Env_Count;
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end Environment_Count;
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-----------------------
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-- Environment_Value --
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-----------------------
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function Environment_Value (Number : Positive) return String is
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procedure Fill_Env (E : System.Address; Env_Num : Integer);
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pragma Import (C, Fill_Env, "__gnat_fill_env");
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function Len_Env (Env_Num : Integer) return Integer;
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pragma Import (C, Len_Env, "__gnat_len_env");
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begin
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if Number > Environment_Count then
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raise Constraint_Error;
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end if;
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declare
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Env : aliased String (1 .. Len_Env (Number - 1));
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begin
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Fill_Env (Env'Address, Number - 1);
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return Env;
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end;
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end Environment_Value;
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end Ada.Command_Line.Environment;
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