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90 lines
3.6 KiB
Plaintext
90 lines
3.6 KiB
Plaintext
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla embedding code.
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*
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* The Initial Developers of the Original Code are
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* Benjamin Smedberg <bsmedberg@covad.net> and
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* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>.
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*
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* Portions created by the Initial Developer are Copyright (C) 2003/2004
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsISupports.idl"
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/**
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* Scriptable access to the current process environment.
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*
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*/
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[scriptable, uuid(101d5941-d820-4e85-a266-9a3469940807)]
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interface nsIEnvironment : nsISupports
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{
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/**
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* Set the value of an environment variable.
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*
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* @param aName the variable name to set.
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* @param aValue the value to set.
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*/
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void set(in AString aName, in AString aValue);
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/**
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* Get the value of an environment variable.
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*
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* @param aName the variable name to retrieve.
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* @return returns the value of the env variable. An empty string
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* will be returned when the env variable does not exist or
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* when the value itself is an empty string - please use
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* |exists()| to probe whether the env variable exists
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* or not.
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*/
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AString get(in AString aName);
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/**
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* Check the existence of an environment variable.
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* This method checks whether an environment variable is present in
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* the environment or not.
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*
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* - For Unix/Linux platforms we follow the Unix definition:
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* An environment variable exists when |getenv()| returns a non-NULL value.
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* An environment variable does not exist when |getenv()| returns NULL.
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* - For non-Unix/Linux platforms we have to fall back to a
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* "portable" definition (which is incorrect for Unix/Linux!!!!)
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* which simply checks whether the string returned by |Get()| is empty
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* or not.
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*
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* @param aName the variable name to probe.
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* @return if the variable has been set, the value returned is
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* PR_TRUE. If the variable was not defined in the
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* environment PR_FALSE will be returned.
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*/
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boolean exists(in AString aName);
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};
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