gecko/xpcom/ds/nsStaticAtom.h

84 lines
3.1 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Static Atom classes.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp.
* Portions created by the Initial Developer are Copyright (C) 2003
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Alec Flett <alecf@netscape.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsStaticAtom_h__
#define nsStaticAtom_h__
#include "nsIAtom.h"
#include "nsStringBuffer.h"
#include "prlog.h"
#if defined(HAVE_CPP_CHAR16_T)
#define NS_STATIC_ATOM_USE_WIDE_STRINGS
typedef char16_t nsStaticAtomStringType;
#elif defined(HAVE_CPP_2BYTE_WCHAR_T)
#define NS_STATIC_ATOM_USE_WIDE_STRINGS
typedef wchar_t nsStaticAtomStringType;
#else
typedef char nsStaticAtomStringType;
#endif
#define NS_STATIC_ATOM(buffer_name, atom_ptr) { (nsStringBuffer*) &buffer_name, atom_ptr }
#define NS_STATIC_ATOM_BUFFER(buffer_name, str_data) static nsFakeStringBuffer< sizeof(str_data) > buffer_name = { 1, sizeof(str_data) * sizeof(nsStaticAtomStringType), NS_L(str_data) };
/**
* Holds data used to initialize large number of atoms during startup. Use
* the above macros to initialize these structs. They should never be accessed
* directly other than from AtomTable.cpp
*/
struct nsStaticAtom {
nsStringBuffer* mStringBuffer;
nsIAtom ** mAtom;
};
/**
* This is a struct with the same binary layout as a nsStringBuffer.
*/
template <PRUint32 size>
struct nsFakeStringBuffer {
PRInt32 mRefCnt;
PRUint32 mSize;
nsStaticAtomStringType mStringData[size];
};
// Register static atoms with the atom table
NS_COM nsresult
NS_RegisterStaticAtoms(const nsStaticAtom*, PRUint32 aAtomCount);
#endif