gecko-dev/xpcom/ds/nsProperties.cpp

116 lines
2.7 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"
#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);
Put(prop, value);
return NS_OK;
}
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, bool *result)
{
NS_ENSURE_ARG(prop);
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 *key, nsISupports* data,
void *arg)
{
GetKeysEnumData *gkedp = (GetKeysEnumData *)arg;
gkedp->keys[gkedp->next] = 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(uint32_t *count, char ***keys)
{
NS_ENSURE_ARG(count);
NS_ENSURE_ARG(keys);
uint32_t 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);
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;
}
*count = n;
*keys = k;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////////////