gecko-dev/xpcom/ds/nsProperties.cpp

122 строки
2.6 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsProperties.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)
{
if (NS_WARN_IF(!prop)) {
return NS_ERROR_INVALID_ARG;
}
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)
{
if (NS_WARN_IF(!prop)) {
return NS_ERROR_INVALID_ARG;
}
Put(prop, value);
return NS_OK;
}
NS_IMETHODIMP
nsProperties::Undefine(const char* prop)
{
if (NS_WARN_IF(!prop)) {
return NS_ERROR_INVALID_ARG;
}
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, bool* result)
{
if (NS_WARN_IF(!prop)) {
return NS_ERROR_INVALID_ARG;
}
nsCOMPtr<nsISupports> value;
*result = nsProperties_HashBase::Get(prop, getter_AddRefs(value));
return NS_OK;
}
struct GetKeysEnumData
{
char** keys;
uint32_t next;
nsresult res;
};
PLDHashOperator
GetKeysEnumerate(const char* aKey, nsISupports* aData, void* aArg)
{
GetKeysEnumData* gkedp = (GetKeysEnumData*)aArg;
gkedp->keys[gkedp->next] = strdup(aKey);
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(uint32_t* aCount, char*** aKeys)
{
if (NS_WARN_IF(!aCount) || NS_WARN_IF(!aKeys)) {
return NS_ERROR_INVALID_ARG;
}
uint32_t n = Count();
char** k = (char**)nsMemory::Alloc(n * sizeof(char*));
GetKeysEnumData gked;
gked.keys = k;
gked.next = 0;
gked.res = NS_OK;
EnumerateRead(GetKeysEnumerate, &gked);
nsresult rv = gked.res;
if (NS_FAILED(rv)) {
// Free 'em all
for (uint32_t i = 0; i < gked.next; i++) {
nsMemory::Free(k[i]);
}
nsMemory::Free(k);
return rv;
}
*aCount = n;
*aKeys = k;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////