/* ***** 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.
 *
 * The Initial Developer of the Original Code is IBM Corporation.
 * Portions created by IBM Corporation are Copyright (C) 2004
 * IBM Corporation. All Rights Reserved.
 *
 * Contributor(s):
 *   Darin Fisher <darin@meer.net>
 *   Benjamin Smedberg <bsmedberg@covad.net>
 *
 * 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 "nsXPCOM.h"
#include "nsXPCOMPrivate.h"
#include "nsStringAPI.h"

#include <string.h>

static const XPCOMFunctions kFrozenFunctions = {
    XPCOM_GLUE_VERSION,
    sizeof(XPCOMFunctions),
    &NS_InitXPCOM2_P,
    &NS_ShutdownXPCOM_P,
    &NS_GetServiceManager_P,
    &NS_GetComponentManager_P,
    &NS_GetComponentRegistrar_P,
    &NS_GetMemoryManager_P,
    &NS_NewLocalFile_P,
    &NS_NewNativeLocalFile_P,
    &NS_RegisterXPCOMExitRoutine_P,
    &NS_UnregisterXPCOMExitRoutine_P,

    // these functions were added post 1.4
    &NS_GetDebug_P,
    &NS_GetTraceRefcnt_P,

    // these functions were added post 1.6
    &NS_StringContainerInit,
    &NS_StringContainerFinish,
    &NS_StringGetData,
    &NS_StringSetData,
    &NS_StringSetDataRange,
    &NS_StringCopy,
    &NS_CStringContainerInit,
    &NS_CStringContainerFinish,
    &NS_CStringGetData,
    &NS_CStringSetData,
    &NS_CStringSetDataRange,
    &NS_CStringCopy,
    &NS_CStringToUTF16,
    &NS_UTF16ToCString,
    &NS_StringCloneData,
    &NS_CStringCloneData,

    // these functions were added post 1.7 (post Firefox 1.0)
    &NS_Alloc_P,
    &NS_Realloc_P,
    &NS_Free_P,
    &NS_StringContainerInit2,
    &NS_CStringContainerInit2
};  

extern "C" NS_EXPORT nsresult
NS_GetFrozenFunctions(XPCOMFunctions *functions, const char* /* libraryPath */)
{
    if (!functions)
        return NS_ERROR_OUT_OF_MEMORY;

    if (functions->version != XPCOM_GLUE_VERSION)
        return NS_ERROR_FAILURE;

    PRUint32 size = functions->size;
    if (size > sizeof(XPCOMFunctions))
        size = sizeof(XPCOMFunctions);

    size -= offsetof(XPCOMFunctions, init);

    memcpy(&functions->init, &kFrozenFunctions.init, size);

    return NS_OK;
}

/*
 * Stubs for nsXPCOM.h
 */

#undef NS_InitXPCOM2
extern "C" NS_EXPORT nsresult
NS_InitXPCOM2(nsIServiceManager **result,
              nsIFile *binDirectory,
              nsIDirectoryServiceProvider *dirProvider)
{
  return NS_InitXPCOM2_P(result, binDirectory, dirProvider);
}

#undef NS_ShutdownXPCOM
extern "C" NS_EXPORT nsresult
NS_ShutdownXPCOM(nsIServiceManager *svcMgr)
{
  return NS_ShutdownXPCOM_P(svcMgr);
}

#undef NS_GetServiceManager
extern "C" NS_EXPORT nsresult
NS_GetServiceManager(nsIServiceManager* *result)
{
  return NS_GetServiceManager_P(result);
}

#undef NS_GetComponentManager
extern "C" NS_EXPORT nsresult
NS_GetComponentManager(nsIComponentManager* *result)
{
  return NS_GetComponentManager_P(result);
}

#undef NS_GetComponentRegistrar
extern "C" NS_EXPORT nsresult
NS_GetComponentRegistrar(nsIComponentRegistrar* *result)
{
  return NS_GetComponentRegistrar_P(result);
}

#undef NS_GetMemoryManager
extern "C" NS_EXPORT nsresult
NS_GetMemoryManager(nsIMemory* *result)
{
  return NS_GetMemoryManager_P(result);
}

#undef NS_NewLocalFile
extern "C" NS_EXPORT nsresult
NS_NewLocalFile(const nsAString &path,
                PRBool followLinks,
                nsILocalFile **result)
{
  return NS_NewLocalFile_P(path, followLinks, result);
}

#undef NS_NewNativeLocalFile
extern "C" NS_EXPORT nsresult
NS_NewNativeLocalFile(const nsACString &path,
                      PRBool followLinks,
                      nsILocalFile **result)
{
  return NS_NewNativeLocalFile_P(path, followLinks, result);
}

#undef NS_GetDebug
extern "C" NS_EXPORT nsresult
NS_GetDebug(nsIDebug **result)
{
  return NS_GetDebug_P(result);
}

#undef NS_GetTraceRefcnt
extern "C" NS_EXPORT nsresult
NS_GetTraceRefcnt(nsITraceRefcnt **result)
{
  return NS_GetTraceRefcnt_P(result);
}

/*
 * Stubs for nsXPCOMPrivate.h
 */

#undef NS_RegisterXPCOMExitRoutine
extern "C" NS_EXPORT nsresult
NS_RegisterXPCOMExitRoutine(XPCOMExitRoutine exitRoutine, PRUint32 priority)
{
  return NS_RegisterXPCOMExitRoutine_P(exitRoutine, priority);
}

#undef NS_UnregisterXPCOMExitRoutine
extern "C" NS_EXPORT nsresult
NS_UnregisterXPCOMExitRoutine(XPCOMExitRoutine exitRoutine)
{
  return NS_UnregisterXPCOMExitRoutine_P(exitRoutine);
}

#undef NS_Alloc
extern "C" NS_EXPORT void*
NS_Alloc(PRSize size)
{
  return NS_Alloc_P(size);
}

#undef NS_Realloc
extern "C" NS_EXPORT void*
NS_Realloc(void* ptr, PRSize size)
{
  return NS_Realloc_P(ptr, size);
}

#undef NS_Free
extern "C" NS_EXPORT void
NS_Free(void* ptr)
{
  NS_Free_P(ptr);
}