/*
 * SHLWAPI initialisation
 *
 *  Copyright 1998 Marcus Meissner
 *  Copyright 1998 Juergen Schmied (jsch)
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include <stdarg.h>

#include "windef.h"
#include "winbase.h"
#include "winerror.h"
#include "wine/debug.h"
#define NO_SHLWAPI_REG
#define NO_SHLWAPI_STREAM
#include "shlwapi.h"

WINE_DEFAULT_DEBUG_CHANNEL(shell);

HINSTANCE shlwapi_hInstance = 0;
HMODULE SHLWAPI_hshell32 = 0;
HMODULE SHLWAPI_hwinmm = 0;
HMODULE SHLWAPI_hcomdlg32 = 0;
HMODULE SHLWAPI_hcomctl32 = 0;
HMODULE SHLWAPI_hmpr = 0;
HMODULE SHLWAPI_hmlang = 0;
HMODULE SHLWAPI_hurlmon = 0;
HMODULE SHLWAPI_hversion = 0;

DWORD SHLWAPI_ThreadRef_index = TLS_OUT_OF_INDEXES;

/*************************************************************************
 * SHLWAPI {SHLWAPI}
 *
 * The Shell Light-Weight Api dll provides a large number of utility functions
 * which are commonly required by Win32 programs. Originally distributed with
 * Internet Explorer as a free download, it became a core part of Windows when
 * Internet Explorer was 'integrated' into the O/S with the release of Win98.
 *
 * All functions exported by ordinal are undocumented by MS. The vast majority
 * of these are wrappers for Unicode functions that may not exist on early 16
 * bit platforms. The remainder perform various small tasks and presumably were
 * added to facilitate code reuse amongst the MS developers.
 */

/*************************************************************************
 * SHLWAPI DllMain
 *
 * NOTES
 *  calling oleinitialize here breaks sone apps.
 */
BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID fImpLoad)
{
	TRACE("%p 0x%lx %p\n", hinstDLL, fdwReason, fImpLoad);
	switch (fdwReason)
	{
	  case DLL_PROCESS_ATTACH:
            DisableThreadLibraryCalls(hinstDLL);
	    shlwapi_hInstance = hinstDLL;
	    SHLWAPI_ThreadRef_index = TlsAlloc();
	    break;
	  case DLL_PROCESS_DETACH:
	    if (SHLWAPI_hshell32)  FreeLibrary(SHLWAPI_hshell32);
	    if (SHLWAPI_hwinmm)    FreeLibrary(SHLWAPI_hwinmm);
	    if (SHLWAPI_hcomdlg32) FreeLibrary(SHLWAPI_hcomdlg32);
	    if (SHLWAPI_hcomctl32) FreeLibrary(SHLWAPI_hcomctl32);
	    if (SHLWAPI_hmpr)      FreeLibrary(SHLWAPI_hmpr);
	    if (SHLWAPI_hmlang)    FreeLibrary(SHLWAPI_hmlang);
	    if (SHLWAPI_hurlmon)   FreeLibrary(SHLWAPI_hurlmon);
	    if (SHLWAPI_hversion)  FreeLibrary(SHLWAPI_hversion);
	    if (SHLWAPI_ThreadRef_index != TLS_OUT_OF_INDEXES) TlsFree(SHLWAPI_ThreadRef_index);
	    break;
	}
	return TRUE;
}

/***********************************************************************
 * DllGetVersion [SHLWAPI.@]
 *
 * Retrieve "shlwapi.dll" version information.
 *
 * PARAMS
 *     pdvi [O] pointer to version information structure.
 *
 * RETURNS
 *     Success: S_OK. pdvi is updated with the version information
 *     Failure: E_INVALIDARG, if pdvi->cbSize is not set correctly.
 *
 * NOTES
 *     You may pass either a DLLVERSIONINFO of DLLVERSIONINFO2 structure
 *     as pdvi, provided that the size is set correctly.
 *     Returns version as shlwapi.dll from IE5.01.
 */
HRESULT WINAPI DllGetVersion (DLLVERSIONINFO *pdvi)
{
  DLLVERSIONINFO2 *pdvi2 = (DLLVERSIONINFO2*)pdvi;

  TRACE("(%p)\n",pdvi);

  switch (pdvi2->info1.cbSize)
  {
  case sizeof(DLLVERSIONINFO2):
    pdvi2->dwFlags = 0;
    pdvi2->ullVersion = MAKEDLLVERULL(5, 0, 2314, 0);
    /* Fall through */
  case sizeof(DLLVERSIONINFO):
    pdvi2->info1.dwMajorVersion = 5;
    pdvi2->info1.dwMinorVersion = 0;
    pdvi2->info1.dwBuildNumber = 2314;
    pdvi2->info1.dwPlatformID = 1000;
    return S_OK;
 }
 if (pdvi)
   WARN("pdvi->cbSize = %ld, unhandled\n", pdvi2->info1.cbSize);
 return E_INVALIDARG;
}