gecko-dev/xpcom/ds/nsProperties.cpp

152 строки
3.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*
* The contents of this file are subject to the Netscape 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/NPL/
*
* 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 mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* IBM Corp.
*/
#define NS_IMPL_IDS
#include "nsProperties.h"
//#include <iostream.h>
////////////////////////////////////////////////////////////////////////////////
nsProperties::nsProperties(nsISupports* outer)
{
NS_INIT_AGGREGATED(outer);
}
NS_METHOD
nsProperties::Create(nsISupports *outer, REFNSIID aIID, void **aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
NS_ENSURE_PROPER_AGGREGATION(outer, aIID);
nsProperties* props = new nsProperties(outer);
if (props == NULL)
return NS_ERROR_OUT_OF_MEMORY;
nsresult rv = props->AggregatedQueryInterface(aIID, aResult);
if (NS_FAILED(rv))
delete props;
return rv;
}
PRBool PR_CALLBACK
nsProperties::ReleaseValues(nsHashKey* key, void* data, void* closure)
{
nsISupports* value = (nsISupports*)data;
NS_IF_RELEASE(value);
return PR_TRUE;
}
nsProperties::~nsProperties()
{
Enumerate(ReleaseValues);
}
NS_IMPL_AGGREGATED(nsProperties);
NS_METHOD
nsProperties::AggregatedQueryInterface(const nsIID& aIID, void** aInstancePtr)
{
NS_ENSURE_ARG_POINTER(aInstancePtr);
if (aIID.Equals(NS_GET_IID(nsISupports)))
*aInstancePtr = GetInner();
else if (aIID.Equals(NS_GET_IID(nsIProperties)))
*aInstancePtr = NS_STATIC_CAST(nsIProperties*, this);
else {
*aInstancePtr = nsnull;
return NS_NOINTERFACE;
}
NS_ADDREF((nsISupports*)*aInstancePtr);
return NS_OK;
}
NS_IMETHODIMP
nsProperties::Define(const char* prop, nsISupports* initialValue)
{
nsCStringKey key(prop);
if (Exists(&key))
return NS_ERROR_FAILURE;
nsISupports* prevValue = (nsISupports*)Put(&key, initialValue);
NS_ASSERTION(prevValue == NULL, "hashtable error");
NS_IF_ADDREF(initialValue);
return NS_OK;
}
NS_IMETHODIMP
nsProperties::Undefine(const char* prop)
{
nsCStringKey key(prop);
if (!Exists(&key))
return NS_ERROR_FAILURE;
nsISupports* prevValue = (nsISupports*)Remove(&key);
NS_IF_RELEASE(prevValue);
return NS_OK;
}
NS_IMETHODIMP
nsProperties::Get(const char* prop, const nsIID & uuid, void* *result)
{
nsresult rv;
nsCStringKey key(prop);
nsISupports* value = (nsISupports*)nsHashtable::Get(&key);
if (value) {
rv = value->QueryInterface(uuid, result);
}
else {
rv = NS_ERROR_FAILURE;
}
return rv;
}
NS_IMETHODIMP
nsProperties::Set(const char* prop, nsISupports* value)
{
nsCStringKey key(prop);
if (!Exists(&key))
return NS_ERROR_FAILURE;
nsISupports* prevValue = (nsISupports*)Put(&key, value);
NS_RELEASE(prevValue);
NS_IF_ADDREF(value);
return NS_OK;
}
NS_IMETHODIMP
nsProperties::Has(const char* prop, PRBool *result)
{
nsCStringKey key(prop);
nsISupports* value = (nsISupports*)nsHashtable::Get(&key);
// XXX this is bogus because it doesn't distinguish between properties
// defined with a value NULL, and undefined properties, but we'll fix
// it later if it becomes a problem
*result = value != nsnull;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////