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/* -*- Mode: C++; tab-width: 8; 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 embedding code.
*
* The Initial Developers of the Original Code are
* Benjamin Smedberg <bsmedberg@covad.net> and
* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>.
*
* Portions created by the Initial Developer are Copyright (C) 2003/2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either 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
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsEnvironment.h"
#include "prenv.h"
#include "prprf.h"
#include "nsAutoLock.h"
#include "nsBaseHashtable.h"
#include "nsHashKeys.h"
#include "nsPromiseFlatString.h"
#include "nsDependentString.h"
#include "nsNativeCharsetUtils.h"
NS_IMPL_THREADSAFE_ISUPPORTS1(nsEnvironment, nsIEnvironment)
NS_METHOD
nsEnvironment::Create(nsISupports *aOuter, REFNSIID aIID,
void **aResult)
{
nsresult rv;
*aResult = nsnull;
if (aOuter != nsnull) {
return NS_ERROR_NO_AGGREGATION;
}
nsEnvironment* obj = new nsEnvironment();
if (!obj) {
return NS_ERROR_OUT_OF_MEMORY;
}
obj->mLock = PR_NewLock();
if (!obj->mLock) {
delete obj;
return NS_ERROR_OUT_OF_MEMORY;
}
rv = obj->QueryInterface(aIID, aResult);
if (NS_FAILED(rv)) {
delete obj;
}
return rv;
}
nsEnvironment::~nsEnvironment()
{
if (mLock)
PR_DestroyLock(mLock);
}
NS_IMETHODIMP
nsEnvironment::Exists(const nsAString& aName, PRBool *aOutValue)
{
nsCAutoString nativeName;
nsresult rv = NS_CopyUnicodeToNative(aName, nativeName);
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString nativeVal;
#if defined(XP_UNIX)
/* For Unix/Linux platforms we follow the Unix definition:
* An environment variable exists when |getenv()| returns a non-NULL value.
* An environment variable does not exist when |getenv()| returns NULL.
*/
const char *value = PR_GetEnv(nativeName.get());
*aOutValue = (value)?(PR_TRUE):(PR_FALSE);
#else
/* For non-Unix/Linux platforms we have to fall back to a
* "portable" definition (which is incorrect for Unix/Linux!!!!)
* which simply checks whether the string returned by |Get()| is empty
* or not.
*/
nsAutoString value;
Get(aName, value);
*aOutValue = (value.IsEmpty())?(PR_FALSE):(PR_TRUE);
#endif /* XP_UNIX */
return NS_OK;
}
NS_IMETHODIMP
nsEnvironment::Get(const nsAString& aName, nsAString& aOutValue)
{
nsCAutoString nativeName;
nsresult rv = NS_CopyUnicodeToNative(aName, nativeName);
NS_ENSURE_SUCCESS(rv, rv);
nsCAutoString nativeVal;
const char *value = PR_GetEnv(nativeName.get());
if (value) {
rv = NS_CopyNativeToUnicode(nsDependentCString(value), aOutValue);
} else {
aOutValue.Truncate();
rv = NS_OK;
}
return rv;
}
/* Environment strings must have static duration; We're gonna leak all of this
* at shutdown: this is by design, caused how Unix/Linux implement environment
* vars.
*/
typedef nsBaseHashtableET<nsCStringHashKey,char*> EnvEntryType;
typedef nsTHashtable<EnvEntryType> EnvHashType;
static EnvHashType *gEnvHash = nsnull;
static PRBool
EnsureEnvHash()
{
if (gEnvHash)
return PR_TRUE;
gEnvHash = new EnvHashType;
if (!gEnvHash)
return PR_FALSE;
if(gEnvHash->Init())
return PR_TRUE;
delete gEnvHash;
gEnvHash = nsnull;
return PR_FALSE;
}
NS_IMETHODIMP
nsEnvironment::Set(const nsAString& aName, const nsAString& aValue)
{
nsCAutoString nativeName;
nsCAutoString nativeVal;
nsresult rv = NS_CopyUnicodeToNative(aName, nativeName);
NS_ENSURE_SUCCESS(rv, rv);
rv = NS_CopyUnicodeToNative(aValue, nativeVal);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoLock lock(mLock); // autolock unlocks automagically
if (!EnsureEnvHash()){
return NS_ERROR_UNEXPECTED;
}
EnvEntryType* entry = gEnvHash->PutEntry(nativeName);
if (!entry) {
return NS_ERROR_OUT_OF_MEMORY;
}
char* newData = PR_smprintf("%s=%s",
nativeName.get(),
nativeVal.get());
if (!newData) {
return NS_ERROR_OUT_OF_MEMORY;
}
PR_SetEnv(newData);
if (entry->mData) {
PR_smprintf_free(entry->mData);
}
entry->mData = newData;
return NS_OK;
}
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