mirror of
https://github.com/mozilla/gecko-dev.git
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552 lines
13 KiB
C++
552 lines
13 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#define NS_IMPL_IDS
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#include "nsProperties.h"
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#include <iostream.h>
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////////////////////////////////////////////////////////////////////////////////
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nsProperties::nsProperties(nsISupports* outer)
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{
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NS_INIT_AGGREGATED(outer);
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}
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NS_METHOD
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nsProperties::Create(nsISupports *outer, REFNSIID aIID, void **aResult)
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{
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NS_ENSURE_ARG_POINTER(aResult);
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NS_ENSURE_PROPER_AGGREGATION(outer, aIID);
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nsProperties* props = new nsProperties(outer);
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if (props == NULL)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv = props->AggregatedQueryInterface(aIID, aResult);
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if (NS_FAILED(rv))
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delete props;
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return rv;
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}
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PRBool
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nsProperties::ReleaseValues(nsHashKey* key, void* data, void* closure)
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{
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nsISupports* value = (nsISupports*)data;
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NS_IF_RELEASE(value);
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return PR_TRUE;
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}
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nsProperties::~nsProperties()
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{
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Enumerate(ReleaseValues);
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}
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NS_IMPL_AGGREGATED(nsProperties);
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NS_METHOD
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nsProperties::AggregatedQueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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NS_ENSURE_ARG_POINTER(aInstancePtr);
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if (aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID()))
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*aInstancePtr = GetInner();
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else if (aIID.Equals(nsIProperties::GetIID()))
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*aInstancePtr = NS_STATIC_CAST(nsIProperties*, this);
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else {
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*aInstancePtr = nsnull;
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return NS_NOINTERFACE;
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}
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NS_ADDREF((nsISupports*)*aInstancePtr);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProperties::DefineProperty(const char* prop, nsISupports* initialValue)
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{
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nsStringKey key(prop);
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if (Exists(&key))
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return NS_ERROR_FAILURE;
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nsISupports* prevValue = (nsISupports*)Put(&key, initialValue);
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NS_ASSERTION(prevValue == NULL, "hashtable error");
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NS_IF_ADDREF(initialValue);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProperties::UndefineProperty(const char* prop)
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{
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nsStringKey key(prop);
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if (!Exists(&key))
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return NS_ERROR_FAILURE;
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nsISupports* prevValue = (nsISupports*)Remove(&key);
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NS_IF_RELEASE(prevValue);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProperties::GetProperty(const char* prop, nsISupports* *result)
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{
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nsStringKey key(prop);
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if (!Exists(&key))
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return NS_ERROR_FAILURE;
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nsISupports* value = (nsISupports*)Get(&key);
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NS_IF_ADDREF(value);
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*result = value;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProperties::SetProperty(const char* prop, nsISupports* value)
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{
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nsStringKey key(prop);
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if (!Exists(&key))
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return NS_ERROR_FAILURE;
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nsISupports* prevValue = (nsISupports*)Put(&key, value);
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NS_IF_RELEASE(prevValue);
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NS_IF_ADDREF(value);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsProperties::HasProperty(const char* prop, nsISupports* expectedValue)
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{
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nsISupports* value;
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nsresult rv = GetProperty(prop, &value);
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if (NS_FAILED(rv)) return NS_COMFALSE;
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rv = (value == expectedValue) ? NS_OK : NS_COMFALSE;
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NS_IF_RELEASE(value);
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return rv;
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}
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////////////////////////////////////////////////////////////////////////////////
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nsresult
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NS_NewIProperties(nsIProperties* *result)
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{
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return nsProperties::Create(NULL, nsIProperties::GetIID(), (void**)result);
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}
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////////////////////////////////////////////////////////////////////////////////
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// Persistent Properties (should go in a separate file)
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////////////////////////////////////////////////////////////////////////////////
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#include "nsID.h"
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#include "nsCRT.h"
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#include "nsIInputStream.h"
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#include "nsIProperties.h"
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#include "nsIUnicharInputStream.h"
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#include "nsProperties.h"
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#include "pratom.h"
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static PLHashNumber
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HashKey(const PRUnichar *aString)
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{
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return (PLHashNumber) nsCRT::HashValue(aString);
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}
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static PRIntn
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CompareKeys(const PRUnichar *aStr1, const PRUnichar *aStr2)
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{
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return nsCRT::strcmp(aStr1, aStr2) == 0;
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}
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nsPersistentProperties::nsPersistentProperties()
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{
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NS_INIT_REFCNT();
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mIn = nsnull;
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mSubclass = NS_STATIC_CAST(nsIPersistentProperties*, this);
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mTable = PL_NewHashTable(8, (PLHashFunction) HashKey,
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(PLHashComparator) CompareKeys,
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(PLHashComparator) nsnull, nsnull, nsnull);
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}
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PR_STATIC_CALLBACK(PRIntn)
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FreeHashEntries(PLHashEntry* he, PRIntn i, void* arg)
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{
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nsCRT::free((PRUnichar*)he->key);
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nsCRT::free((PRUnichar*)he->value);
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return HT_ENUMERATE_REMOVE;
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}
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nsPersistentProperties::~nsPersistentProperties()
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{
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if (mTable) {
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// Free the PRUnicode* pointers contained in the hash table entries
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PL_HashTableEnumerateEntries(mTable, FreeHashEntries, 0);
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PL_HashTableDestroy(mTable);
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mTable = nsnull;
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}
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}
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NS_METHOD
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nsPersistentProperties::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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nsPersistentProperties* props = new nsPersistentProperties();
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if (props == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(props);
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nsresult rv = props->QueryInterface(aIID, aResult);
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NS_RELEASE(props);
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return rv;
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}
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NS_IMPL_ISUPPORTS2(nsPersistentProperties, nsIPersistentProperties, nsIProperties)
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NS_IMETHODIMP
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nsPersistentProperties::Load(nsIInputStream *aIn)
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{
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PRInt32 c;
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nsresult ret;
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nsAutoString uesc("x-u-escaped");
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ret = NS_NewConverterStream(&mIn, nsnull, aIn, 0, &uesc);
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if (ret != NS_OK) {
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#ifdef NS_DEBUG
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cout << "NS_NewConverterStream failed" << endl;
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#endif
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return NS_ERROR_FAILURE;
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}
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c = Read();
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while (1) {
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c = SkipWhiteSpace(c);
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if (c < 0) {
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break;
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}
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else if ((c == '#') || (c == '!')) {
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c = SkipLine(c);
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continue;
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}
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else {
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nsAutoString key("");
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while ((c >= 0) && (c != '=') && (c != ':')) {
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key.Append((PRUnichar) c);
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c = Read();
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}
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if (c < 0) {
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break;
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}
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char *trimThese = " \t";
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key.Trim(trimThese, PR_FALSE, PR_TRUE);
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c = Read();
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nsAutoString value("");
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while ((c >= 0) && (c != '\r') && (c != '\n')) {
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if (c == '\\') {
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c = Read();
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if ((c == '\r') || (c == '\n')) {
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c = SkipWhiteSpace(c);
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}
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else {
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value.Append('\\');
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}
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}
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value.Append((PRUnichar) c);
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c = Read();
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}
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value.Trim(trimThese, PR_TRUE, PR_TRUE);
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nsAutoString oldValue("");
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mSubclass->SetStringProperty(key, value, oldValue);
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}
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}
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mIn->Close();
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NS_RELEASE(mIn);
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NS_ASSERTION(!mIn, "unexpected remaining reference");
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPersistentProperties::SetStringProperty(const nsString& aKey, nsString& aNewValue,
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nsString& aOldValue)
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{
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// XXX The ToNewCString() calls allocate memory using "new" so this code
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// causes a memory leak...
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#if 0
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cout << "will add " << aKey.ToNewCString() << "=" << aNewValue.ToNewCString() << endl;
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#endif
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if (!mTable) {
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return NS_ERROR_FAILURE;
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}
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const PRUnichar *key = aKey.GetUnicode(); // returns internal pointer (not a copy)
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PRUint32 len;
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PRUint32 hashValue = nsCRT::HashValue(key, &len);
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PLHashEntry **hep = PL_HashTableRawLookup(mTable, hashValue, key);
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PLHashEntry *he = *hep;
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if (he) {
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// XXX should we copy the old value to aOldValue, and then remove it?
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#ifdef NS_DEBUG
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char buf[128];
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aKey.ToCString(buf, sizeof(buf));
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printf("warning: property %s already exists\n", buf);
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#endif
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return NS_OK;
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}
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PL_HashTableRawAdd(mTable, hep, hashValue, aKey.ToNewUnicode(),
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aNewValue.ToNewUnicode());
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Save(nsIOutputStream* aOut, const nsString& aHeader)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::Subclass(nsIPersistentProperties* aSubclass)
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{
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if (aSubclass) {
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mSubclass = aSubclass;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPersistentProperties::GetStringProperty(const nsString& aKey, nsString& aValue)
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{
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if (!mTable)
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return NS_ERROR_FAILURE;
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const PRUnichar *key = aKey.GetUnicode();
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if (!mTable) {
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return NS_ERROR_FAILURE;
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}
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PRUint32 len;
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PRUint32 hashValue = nsCRT::HashValue(key, &len);
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PLHashEntry **hep = PL_HashTableRawLookup(mTable, hashValue, key);
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PLHashEntry *he = *hep;
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if (he) {
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aValue = (const PRUnichar*)he->value;
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return NS_OK;
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}
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return NS_ERROR_FAILURE;
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}
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PR_STATIC_CALLBACK(PRIntn)
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AddElemToArray(PLHashEntry* he, PRIntn i, void* arg)
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{
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nsISupportsArray *propArray = (nsISupportsArray *) arg;
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nsString* keyStr = new nsString((PRUnichar*) he->key);
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nsString* valueStr = new nsString((PRUnichar*) he->value);
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nsPropertyElement *element = new nsPropertyElement();
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if (!element)
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return HT_ENUMERATE_STOP;
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NS_ADDREF(element);
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element->SetKey(keyStr);
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element->SetValue(valueStr);
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propArray->InsertElementAt(element, i);
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return HT_ENUMERATE_NEXT;
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}
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NS_IMETHODIMP
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nsPersistentProperties::EnumerateProperties(nsIBidirectionalEnumerator** aResult)
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{
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if (!mTable)
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return NS_ERROR_FAILURE;
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nsISupportsArray* propArray;
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nsresult rv = NS_NewISupportsArray(&propArray);
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if (rv != NS_OK)
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return rv;
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// Step through hash entries populating a transient array
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PRIntn n = PL_HashTableEnumerateEntries(mTable, AddElemToArray, (void *)propArray);
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if ( n < (PRIntn) mTable->nentries )
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return NS_ERROR_OUT_OF_MEMORY;
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// Convert array into enumerator
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rv = NS_NewISupportsArrayEnumerator(propArray, aResult);
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if (rv != NS_OK)
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return rv;
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return NS_OK;
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}
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PRInt32
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nsPersistentProperties::Read()
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{
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PRUnichar c;
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PRUint32 nRead;
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nsresult ret;
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ret = mIn->Read(&c, 0, 1, &nRead);
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if (ret == NS_OK && nRead == 1) {
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return c;
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}
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return -1;
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}
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#define IS_WHITE_SPACE(c) \
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(((c) == ' ') || ((c) == '\t') || ((c) == '\r') || ((c) == '\n'))
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PRInt32
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nsPersistentProperties::SkipWhiteSpace(PRInt32 c)
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{
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while ((c >= 0) && IS_WHITE_SPACE(c)) {
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c = Read();
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}
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return c;
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}
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PRInt32
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nsPersistentProperties::SkipLine(PRInt32 c)
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{
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while ((c >= 0) && (c != '\r') && (c != '\n')) {
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c = Read();
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}
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if (c == '\r') {
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c = Read();
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}
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if (c == '\n') {
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c = Read();
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}
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return c;
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}
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////////////////////////////////////////////////////////////////////////////////
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NS_IMETHODIMP
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nsPersistentProperties::DefineProperty(const char* prop, nsISupports* initialValue)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::UndefineProperty(const char* prop)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::GetProperty(const char* prop, nsISupports* *result)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::SetProperty(const char* prop, nsISupports* value)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsPersistentProperties::HasProperty(const char* prop, nsISupports* value)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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////////////////////////////////////////////////////////////////////////////////
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// PropertyElement
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////////////////////////////////////////////////////////////////////////////////
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nsPropertyElement::nsPropertyElement()
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{
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NS_INIT_REFCNT();
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mKey = nsnull;
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mValue = nsnull;
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}
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nsPropertyElement::~nsPropertyElement()
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{
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if (mKey)
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delete mKey;
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if (mValue)
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delete mValue;
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}
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NS_METHOD
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nsPropertyElement::Create(nsISupports *aOuter, REFNSIID aIID, void **aResult)
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{
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if (aOuter)
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return NS_ERROR_NO_AGGREGATION;
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nsPropertyElement* propElem = new nsPropertyElement();
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if (propElem == nsnull)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(propElem);
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nsresult rv = propElem->QueryInterface(aIID, aResult);
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NS_RELEASE(propElem);
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return rv;
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}
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NS_IMPL_ISUPPORTS1(nsPropertyElement, nsIPropertyElement)
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NS_IMETHODIMP
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nsPropertyElement::GetKey(nsString** aReturnKey)
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{
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if (aReturnKey)
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{
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*aReturnKey = mKey;
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return NS_OK;
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}
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return NS_ERROR_INVALID_POINTER;
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}
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NS_IMETHODIMP
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nsPropertyElement::GetValue(nsString** aReturnValue)
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{
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if (aReturnValue)
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{
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*aReturnValue = mValue;
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return NS_OK;
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}
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return NS_ERROR_INVALID_POINTER;
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}
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NS_IMETHODIMP
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nsPropertyElement::SetKey(nsString* aKey)
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{
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mKey = aKey;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsPropertyElement::SetValue(nsString* aValue)
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{
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mValue = aValue;
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return NS_OK;
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}
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////////////////////////////////////////////////////////////////////////////////
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