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Diffstat (limited to '')
| -rw-r--r-- | src/libs/xpcom18a4/xpcom/threads/nsEnvironment.cpp | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/threads/nsEnvironment.cpp b/src/libs/xpcom18a4/xpcom/threads/nsEnvironment.cpp new file mode 100644 index 00000000..139b24a6 --- /dev/null +++ b/src/libs/xpcom18a4/xpcom/threads/nsEnvironment.cpp @@ -0,0 +1,202 @@ +/* -*- 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; +} + + |