gecko-dev/xpcom/ds/nsStringImpl.cpp

138 строки
2.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; 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.
*/
/*
The default implementation for nsIString.
*/
#include "nsIString.h"
#include "nsStr.h"
////////////////////////////////////////////////////////////////////////
static NS_DEFINE_IID(kIStringIID, NS_ISTRING_IID);
////////////////////////////////////////////////////////////////////////
class nsStringImpl : public nsIString
{
protected:
nsStr mStr;
public:
nsStringImpl();
virtual ~nsStringImpl();
// nsISupports interface
NS_DECL_ISUPPORTS
// nsIString interface
NS_IMETHOD Init(eCharSize aCharSize);
NS_IMETHOD SetStr(nsStr* aStr);
NS_IMETHOD GetStr(nsStr* aStr);
NS_IMETHOD GetImmutableStr(const nsStr** aStr);
};
////////////////////////////////////////////////////////////////////////
nsStringImpl::nsStringImpl()
{
NS_INIT_REFCNT();
nsStr::Initialize(mStr, kDefaultCharSize);
}
nsStringImpl::~nsStringImpl()
{
nsStr::Destroy(mStr);
}
PR_IMPLEMENT(nsresult)
NS_NewString(nsIString** aString)
{
NS_PRECONDITION(aString != nsnull, "null ptr");
if (! aString)
return NS_ERROR_NULL_POINTER;
nsStringImpl* s = new nsStringImpl();
if (! s)
return NS_ERROR_OUT_OF_MEMORY;
NS_ADDREF(s);
*aString = s;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
// nsISupports interface
NS_IMPL_ADDREF(nsStringImpl);
NS_IMPL_RELEASE(nsStringImpl);
NS_IMPL_QUERY_INTERFACE(nsStringImpl, kIStringIID);
////////////////////////////////////////////////////////////////////////
NS_IMETHODIMP
nsStringImpl::Init(eCharSize aCharSize)
{
nsStr::Initialize(mStr, aCharSize);
return NS_OK;
}
NS_IMETHODIMP
nsStringImpl::SetStr(nsStr* aStr)
{
NS_PRECONDITION(aStr != nsnull, "null ptr");
if (! aStr)
return NS_ERROR_NULL_POINTER;
nsStr::Assign(mStr, *aStr, 0, aStr->mLength);
return NS_OK;
}
NS_IMETHODIMP
nsStringImpl::GetStr(nsStr* aStr)
{
NS_PRECONDITION(aStr != nsnull, "null ptr");
if (! aStr)
return NS_ERROR_NULL_POINTER;
nsStr::Assign(*aStr, mStr, 0, mStr.mLength);
return NS_OK;
}
NS_IMETHODIMP
nsStringImpl::GetImmutableStr(const nsStr** aImmutableStr)
{
NS_PRECONDITION(aImmutableStr != nsnull, "null ptr");
if (! aImmutableStr)
return NS_ERROR_NULL_POINTER;
*aImmutableStr = &mStr;
return NS_OK;
}