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lightning-sunbird  0.9+nobinonly
nsStringBuffer.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* vim:set ts=2 sw=2 sts=2 et cindent: */
00003 /* ***** BEGIN LICENSE BLOCK *****
00004  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00005  *
00006  * The contents of this file are subject to the Mozilla Public License Version
00007  * 1.1 (the "License"); you may not use this file except in compliance with
00008  * the License. You may obtain a copy of the License at
00009  * http://www.mozilla.org/MPL/
00010  *
00011  * Software distributed under the License is distributed on an "AS IS" basis,
00012  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00013  * for the specific language governing rights and limitations under the
00014  * License.
00015  *
00016  * The Original Code is Mozilla.
00017  *
00018  * The Initial Developer of the Original Code is IBM Corporation.
00019  * Portions created by IBM Corporation are Copyright (C) 2003
00020  * IBM Corporation. All Rights Reserved.
00021  *
00022  * Contributor(s):
00023  *   Darin Fisher <darin@meer.net>
00024  *
00025  * Alternatively, the contents of this file may be used under the terms of
00026  * either the GNU General Public License Version 2 or later (the "GPL"), or
00027  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00028  * in which case the provisions of the GPL or the LGPL are applicable instead
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00036  *
00037  * ***** END LICENSE BLOCK ***** */
00038 
00039 #ifndef nsStringBuffer_h__
00040 #define nsStringBuffer_h__
00041 
00051 class nsStringBuffer
00052   {
00053     private:
00054 
00055       PRInt32  mRefCount;
00056       PRUint32 mStorageSize;
00057 
00058     public:
00059       
00074       NS_COM static nsStringBuffer* Alloc(size_t storageSize);
00075 
00087       NS_COM static nsStringBuffer* Realloc(nsStringBuffer* buf, size_t storageSize);
00088 
00092       NS_COM void NS_FASTCALL AddRef();
00093 
00098       NS_COM void NS_FASTCALL Release();
00099 
00105       static nsStringBuffer* FromData(void* data)
00106         {
00107           return (nsStringBuffer*) ( ((char*) data) - sizeof(nsStringBuffer) );
00108         }
00109 
00113       void* Data() const
00114         {
00115           return (void*) ( ((char*) this) + sizeof(nsStringBuffer) );
00116         }
00117 
00123       PRUint32 StorageSize() const
00124         {
00125           return mStorageSize;
00126         }
00127 
00136       PRBool IsReadonly() const
00137         {
00138           return mRefCount > 1;
00139         }
00140 
00149       NS_COM static nsStringBuffer* FromString(const nsAString &str);
00150       NS_COM static nsStringBuffer* FromString(const nsACString &str);
00151 
00166       NS_COM void ToString(PRUint32 len, nsAString &str);
00167       NS_COM void ToString(PRUint32 len, nsACString &str);
00168   };
00169 
00170 #endif /* !defined(nsStringBuffer_h__ */