gecko-dev/xpcom/base/nsID.h

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2.5 KiB
C

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#ifndef nsID_h__
#define nsID_h__
#include "prtypes.h"
#include "string.h"
#include "nsCom.h"
/**
* A "unique identifier". This is modeled after OSF DCE UUIDs.
*/
struct nsID {
/**
* @name Indentifier values
*/
//@{
PRUint32 m0;
PRUint16 m1;
PRUint16 m2;
PRUint8 m3[8];
//@}
/**
* @name Methods
*/
//@{
/**
* Equivalency method. Compares this nsID with another.
* @return <b>PR_TRUE</b> if they are the same, <b>PR_FALSE</b> if not.
*/
inline PRBool Equals(const nsID& other) const {
return (PRBool)
((((PRUint32*) &m0)[0] == ((PRUint32*) &other.m0)[0]) &&
(((PRUint32*) &m0)[1] == ((PRUint32*) &other.m0)[1]) &&
(((PRUint32*) &m0)[2] == ((PRUint32*) &other.m0)[2]) &&
(((PRUint32*) &m0)[3] == ((PRUint32*) &other.m0)[3]));
}
/**
* nsID Parsing method. Turns a {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
* string into an nsID
*/
NS_COM PRBool Parse(char *aIDStr);
/**
* nsID string encoder. Returns an allocated string in
* {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} format. Caller should free string.
*/
NS_COM char* ToString() const;
//@}
};
/**
* Declare an ID. If NS_IMPL_IDS is set, a variable <i>_name</i> is declared
* with the given values, otherwise <i>_name</i> is declared as an
* <tt>extern</tt> variable.
*/
#ifdef NS_IMPL_IDS
#define NS_DECLARE_ID(_name,m0,m1,m2,m30,m31,m32,m33,m34,m35,m36,m37) \
extern "C" const nsID _name = {m0,m1,m2,{m30,m31,m32,m33,m34,m35,m36,m37}}
#else
#define NS_DECLARE_ID(_name,m0,m1,m2,m30,m31,m32,m33,m34,m35,m36,m37) \
extern "C" const nsID _name
#endif
/*
* Class IDs
*/
typedef nsID nsCID;
// Define an CID
#define NS_DEFINE_CID(_name, _cidspec) \
const nsCID _name = _cidspec
#define REFNSCID const nsCID&
#endif