gecko-dev/xpcom/ds/nsProperties.cpp

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4.2 KiB
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/* -*- Mode: C++; tab-width: 2; 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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
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*
* ***** END LICENSE BLOCK ***** */
#include "nsProperties.h"
#include "nsString.h"
#include "nsCRT.h"
////////////////////////////////////////////////////////////////////////////////
NS_IMPL_AGGREGATED(nsProperties)
NS_INTERFACE_MAP_BEGIN_AGGREGATED(nsProperties)
NS_INTERFACE_MAP_ENTRY(nsIProperties)
NS_INTERFACE_MAP_END
NS_IMETHODIMP
nsProperties::Get(const char* prop, const nsIID & uuid, void* *result)
{
NS_ENSURE_ARG(prop);
nsCOMPtr<nsISupports> value;
if (!nsProperties_HashBase::Get(prop, getter_AddRefs(value))) {
return NS_ERROR_FAILURE;
}
return (value) ? value->QueryInterface(uuid, result) : NS_ERROR_NO_INTERFACE;
}
NS_IMETHODIMP
nsProperties::Set(const char* prop, nsISupports* value)
{
NS_ENSURE_ARG(prop);
return Put(prop, value) ? NS_OK : NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsProperties::Undefine(const char* prop)
{
NS_ENSURE_ARG(prop);
nsCOMPtr<nsISupports> value;
if (!nsProperties_HashBase::Get(prop, getter_AddRefs(value)))
return NS_ERROR_FAILURE;
Remove(prop);
return NS_OK;
}
NS_IMETHODIMP
nsProperties::Has(const char* prop, PRBool *result)
{
NS_ENSURE_ARG(prop);
nsCOMPtr<nsISupports> value;
*result = nsProperties_HashBase::Get(prop,
getter_AddRefs(value));
return NS_OK;
}
struct GetKeysEnumData
{
char **keys;
PRUint32 next;
nsresult res;
};
PR_CALLBACK PLDHashOperator
GetKeysEnumerate(const char *key, nsISupports* data,
void *arg)
{
GetKeysEnumData *gkedp = (GetKeysEnumData *)arg;
gkedp->keys[gkedp->next] = nsCRT::strdup(key);
if (!gkedp->keys[gkedp->next]) {
gkedp->res = NS_ERROR_OUT_OF_MEMORY;
return PL_DHASH_STOP;
}
gkedp->next++;
return PL_DHASH_NEXT;
}
NS_IMETHODIMP
nsProperties::GetKeys(PRUint32 *count, char ***keys)
{
NS_ENSURE_ARG(count);
NS_ENSURE_ARG(keys);
PRUint32 n = Count();
char ** k = (char **) nsMemory::Alloc(n * sizeof(char *));
NS_ENSURE_TRUE(k, NS_ERROR_OUT_OF_MEMORY);
GetKeysEnumData gked;
gked.keys = k;
gked.next = 0;
gked.res = NS_OK;
EnumerateRead(GetKeysEnumerate, &gked);
if (NS_FAILED(gked.res)) {
// Free 'em all
for (PRUint32 i = 0; i < gked.next; i++)
nsMemory::Free(k[i]);
nsMemory::Free(k);
return gked.res;
}
*count = n;
*keys = k;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////