/*
 * 16 bit ole functions
 *
 * Copyright 1995 Martin von Loewis
 * Copyright 1998 Justin Bradford
 * Copyright 1999 Francis Beaudet
 * Copyright 1999 Sylvain St-Germain
 * Copyright 2002 Marcus Meissner
 *
 * 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 "config.h"

#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "windef.h"
#include "winbase.h"
#include "winuser.h"
#include "objbase.h"
#include "ole2.h"
#include "rpc.h"
#include "winerror.h"
#include "winreg.h"
#include "wownt32.h"
#include "wtypes.h"
#include "wine/unicode.h"
#include "wine/winbase16.h"
#include "compobj_private.h"
#include "ifs.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(ole);

static HTASK16 hETask = 0;
static WORD Table_ETask[62];

static LPMALLOC16 currentMalloc16=NULL;

/* --- IMalloc16 implementation */


typedef struct
{
        /* IUnknown fields */
        const IMalloc16Vtbl    *lpVtbl;
        DWORD                   ref;
        /* IMalloc16 fields */
} IMalloc16Impl;

/******************************************************************************
 *		IMalloc16_QueryInterface	[COMPOBJ.500]
 */
HRESULT CDECL IMalloc16_fnQueryInterface(IMalloc16* iface,REFIID refiid,LPVOID *obj) {
        IMalloc16Impl *This = (IMalloc16Impl *)iface;

	TRACE("(%p)->QueryInterface(%s,%p)\n",This,debugstr_guid(refiid),obj);
	if (	!memcmp(&IID_IUnknown,refiid,sizeof(IID_IUnknown)) ||
		!memcmp(&IID_IMalloc,refiid,sizeof(IID_IMalloc))
	) {
		*obj = This;
		return 0;
	}
	return OLE_E_ENUM_NOMORE;
}

/******************************************************************************
 *		IMalloc16_AddRef	[COMPOBJ.501]
 */
ULONG CDECL IMalloc16_fnAddRef(IMalloc16* iface) {
        IMalloc16Impl *This = (IMalloc16Impl *)iface;
	TRACE("(%p)->AddRef()\n",This);
	return 1; /* cannot be freed */
}

/******************************************************************************
 *		IMalloc16_Release	[COMPOBJ.502]
 */
ULONG CDECL IMalloc16_fnRelease(IMalloc16* iface) {
        IMalloc16Impl *This = (IMalloc16Impl *)iface;
	TRACE("(%p)->Release()\n",This);
	return 1; /* cannot be freed */
}

/******************************************************************************
 * IMalloc16_Alloc [COMPOBJ.503]
 */
SEGPTR CDECL IMalloc16_fnAlloc(IMalloc16* iface,DWORD cb) {
        IMalloc16Impl *This = (IMalloc16Impl *)iface;
	TRACE("(%p)->Alloc(%d)\n",This,cb);
        return MapLS( HeapAlloc( GetProcessHeap(), 0, cb ) );
}

/******************************************************************************
 * IMalloc16_Free [COMPOBJ.505]
 */
VOID CDECL IMalloc16_fnFree(IMalloc16* iface,SEGPTR pv)
{
    void *ptr = MapSL(pv);
    IMalloc16Impl *This = (IMalloc16Impl *)iface;
    TRACE("(%p)->Free(%08x)\n",This,pv);
    UnMapLS(pv);
    HeapFree( GetProcessHeap(), 0, ptr );
}

/******************************************************************************
 * IMalloc16_Realloc [COMPOBJ.504]
 */
SEGPTR CDECL IMalloc16_fnRealloc(IMalloc16* iface,SEGPTR pv,DWORD cb)
{
    SEGPTR ret;
    IMalloc16Impl *This = (IMalloc16Impl *)iface;
    TRACE("(%p)->Realloc(%08x,%d)\n",This,pv,cb);
    if (!pv) 
	ret = IMalloc16_fnAlloc(iface, cb);
    else if (cb) {
        ret = MapLS( HeapReAlloc( GetProcessHeap(), 0, MapSL(pv), cb ) );
        UnMapLS(pv);
    } else {
	IMalloc16_fnFree(iface, pv);
	ret = 0;
    }
    return ret;
}

/******************************************************************************
 * IMalloc16_GetSize [COMPOBJ.506]
 */
DWORD CDECL IMalloc16_fnGetSize(IMalloc16* iface,SEGPTR pv)
{
	IMalloc16Impl *This = (IMalloc16Impl *)iface;
        TRACE("(%p)->GetSize(%08x)\n",This,pv);
        return HeapSize( GetProcessHeap(), 0, MapSL(pv) );
}

/******************************************************************************
 * IMalloc16_DidAlloc [COMPOBJ.507]
 */
INT16 CDECL IMalloc16_fnDidAlloc(IMalloc16* iface,LPVOID pv) {
        IMalloc16 *This = iface;
	TRACE("(%p)->DidAlloc(%p)\n",This,pv);
	return (INT16)-1;
}

/******************************************************************************
 * IMalloc16_HeapMinimize [COMPOBJ.508]
 */
LPVOID CDECL IMalloc16_fnHeapMinimize(IMalloc16* iface) {
        IMalloc16Impl *This = (IMalloc16Impl *)iface;
	TRACE("(%p)->HeapMinimize()\n",This);
	return NULL;
}

/******************************************************************************
 * IMalloc16_Constructor [VTABLE]
 */
LPMALLOC16
IMalloc16_Constructor(void)
{
    static IMalloc16Vtbl vt16;
    static SEGPTR msegvt16;
    IMalloc16Impl* This;
    HMODULE16 hcomp = GetModuleHandle16("COMPOBJ");

    This = HeapAlloc( GetProcessHeap(), 0, sizeof(IMalloc16Impl) );
    if (!msegvt16)
    {
#define VTENT(x) vt16.x = (void*)GetProcAddress16(hcomp,"IMalloc16_"#x);assert(vt16.x)
        VTENT(QueryInterface);
        VTENT(AddRef);
        VTENT(Release);
        VTENT(Alloc);
        VTENT(Realloc);
        VTENT(Free);
        VTENT(GetSize);
        VTENT(DidAlloc);
        VTENT(HeapMinimize);
#undef VTENT
        msegvt16 = MapLS( &vt16 );
    }
    This->lpVtbl = (const IMalloc16Vtbl*)msegvt16;
    This->ref = 1;
    return (LPMALLOC16)MapLS( This );
}


/***********************************************************************
 *           CoGetMalloc    [COMPOBJ.4]
 *
 * Retrieve the current win16 IMalloc interface.
 *
 * RETURNS
 *	The current win16 IMalloc
 */
HRESULT WINAPI CoGetMalloc16(
	DWORD dwMemContext,	/* [in] unknown */
	LPMALLOC16 * lpMalloc	/* [out] current win16 malloc interface */
) {
    if(!currentMalloc16)
	currentMalloc16 = IMalloc16_Constructor();
    *lpMalloc = currentMalloc16;
    return S_OK;
}

/***********************************************************************
 *           CoCreateStandardMalloc [COMPOBJ.71]
 */
HRESULT WINAPI CoCreateStandardMalloc16(DWORD dwMemContext,
					  LPMALLOC16 *lpMalloc)
{
    /* FIXME: docu says we shouldn't return the same allocator as in
     * CoGetMalloc16 */
    *lpMalloc = IMalloc16_Constructor();
    return S_OK;
}

/******************************************************************************
 *		CoInitialize	[COMPOBJ.2]
 * Set the win16 IMalloc used for memory management
 */
HRESULT WINAPI CoInitialize16(
	LPVOID lpReserved	/* [in] pointer to win16 malloc interface */
) {
    currentMalloc16 = (LPMALLOC16)lpReserved;
    return S_OK;
}

/***********************************************************************
 *           CoUninitialize   [COMPOBJ.3]
 * Don't know what it does.
 * 3-Nov-98 -- this was originally misspelled, I changed it to what I
 *   believe is the correct spelling
 */
void WINAPI CoUninitialize16(void)
{
  TRACE("()\n");
  CoFreeAllLibraries();
}

/***********************************************************************
 *           IsEqualGUID [COMPOBJ.18]
 *
 * Compares two Unique Identifiers.
 *
 * RETURNS
 *	TRUE if equal
 */
BOOL16 WINAPI IsEqualGUID16(
	GUID* g1,	/* [in] unique id 1 */
	GUID* g2)	/* [in] unique id 2 */
{
    return !memcmp( g1, g2, sizeof(GUID) );
}

/******************************************************************************
 *		CLSIDFromString	[COMPOBJ.20]
 * Converts a unique identifier from its string representation into
 * the GUID struct.
 *
 * Class id: DWORD-WORD-WORD-BYTES[2]-BYTES[6]
 *
 * RETURNS
 *	the converted GUID
 */
HRESULT WINAPI CLSIDFromString16(
	LPCOLESTR16 idstr,	/* [in] string representation of guid */
	CLSID *id)		/* [out] GUID converted from string */
{
  const BYTE *s;
  int	i;
  BYTE table[256];

  if (!idstr) {
    memset( id, 0, sizeof (CLSID) );
    return S_OK;
  }

  /* validate the CLSID string */
  if (strlen(idstr) != 38)
    return CO_E_CLASSSTRING;

  s = (const BYTE *) idstr;
  if ((s[0]!='{') || (s[9]!='-') || (s[14]!='-') || (s[19]!='-') || (s[24]!='-') || (s[37]!='}'))
    return CO_E_CLASSSTRING;

  for (i=1; i<37; i++) {
    if ((i == 9)||(i == 14)||(i == 19)||(i == 24)) continue;
    if (!(((s[i] >= '0') && (s[i] <= '9'))  ||
          ((s[i] >= 'a') && (s[i] <= 'f'))  ||
          ((s[i] >= 'A') && (s[i] <= 'F'))))
       return CO_E_CLASSSTRING;
  }

  TRACE("%s -> %p\n", s, id);

  /* quick lookup table */
  memset(table, 0, 256);

  for (i = 0; i < 10; i++) {
    table['0' + i] = i;
  }
  for (i = 0; i < 6; i++) {
    table['A' + i] = i+10;
    table['a' + i] = i+10;
  }

  /* in form {XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX} */

  id->Data1 = (table[s[1]] << 28 | table[s[2]] << 24 | table[s[3]] << 20 | table[s[4]] << 16 |
               table[s[5]] << 12 | table[s[6]] << 8  | table[s[7]] << 4  | table[s[8]]);
  id->Data2 = table[s[10]] << 12 | table[s[11]] << 8 | table[s[12]] << 4 | table[s[13]];
  id->Data3 = table[s[15]] << 12 | table[s[16]] << 8 | table[s[17]] << 4 | table[s[18]];

  /* these are just sequential bytes */
  id->Data4[0] = table[s[20]] << 4 | table[s[21]];
  id->Data4[1] = table[s[22]] << 4 | table[s[23]];
  id->Data4[2] = table[s[25]] << 4 | table[s[26]];
  id->Data4[3] = table[s[27]] << 4 | table[s[28]];
  id->Data4[4] = table[s[29]] << 4 | table[s[30]];
  id->Data4[5] = table[s[31]] << 4 | table[s[32]];
  id->Data4[6] = table[s[33]] << 4 | table[s[34]];
  id->Data4[7] = table[s[35]] << 4 | table[s[36]];

  return S_OK;
}

/******************************************************************************
 *		_xmalloc16	[internal]
 * Allocates size bytes from the standard ole16 allocator.
 *
 * RETURNS
 *	the allocated segmented pointer and a HRESULT
 */
static HRESULT
_xmalloc16(DWORD size, SEGPTR *ptr) {
  LPMALLOC16 mllc;
  DWORD args[2];

  if (CoGetMalloc16(0,&mllc))
    return E_OUTOFMEMORY;

  args[0] = (DWORD)mllc;
  args[1] = size;
  /* No need for a Callback entry, we have WOWCallback16Ex which does
   * everything we need.
   */
  if (!WOWCallback16Ex(
      (DWORD)((const IMalloc16Vtbl*)MapSL(
	  (SEGPTR)((LPMALLOC16)MapSL((SEGPTR)mllc))->lpVtbl  )
      )->Alloc,
      WCB16_CDECL,
      2*sizeof(DWORD),
      (LPVOID)args,
      (LPDWORD)ptr
  )) {
      ERR("CallTo16 IMalloc16 (%d) failed\n",size);
      return E_FAIL;
  }
  return S_OK;
}

/******************************************************************************
 *		StringFromCLSID	[COMPOBJ.19]
 * Converts a GUID into the respective string representation.
 * The target string is allocated using the OLE IMalloc.
 *
 * RETURNS
 *	the string representation and HRESULT
 */

HRESULT WINAPI StringFromCLSID16(
  REFCLSID id,		/* [in] the GUID to be converted */
  LPOLESTR16 *idstr	/* [out] a pointer to a to-be-allocated segmented pointer pointing to the resulting string */

) {
  HRESULT ret;

  ret = _xmalloc16(40,(SEGPTR*)idstr);
  if (ret != S_OK)
    return ret;
  return WINE_StringFromCLSID(id,MapSL((SEGPTR)*idstr));
}

/******************************************************************************
 * ProgIDFromCLSID [COMPOBJ.62]
 *
 * Converts a class id into the respective Program ID. (By using a registry lookup)
 *
 * RETURNS
 *  S_OK on success
 *  riid associated with the progid
 */
HRESULT WINAPI ProgIDFromCLSID16(
  REFCLSID clsid, /* [in] class id as found in registry */
  LPOLESTR16 *lplpszProgID/* [out] associated Program ID */
) {
  static const WCHAR wszProgID[] = {'P','r','o','g','I','D',0};
  HKEY     hkey;
  HRESULT  ret;
  LONG     len;
  char    *buffer;

  ret = COM_OpenKeyForCLSID(clsid, wszProgID, KEY_READ, &hkey);
  if (FAILED(ret))
    return ret;
  
  if (RegQueryValueA(hkey, NULL, NULL, &len))
    ret = REGDB_E_READREGDB;

  if (ret == S_OK)
  {
    buffer = HeapAlloc(GetProcessHeap(), 0, len);
    if (RegQueryValueA(hkey, NULL, buffer, &len))
      ret = REGDB_E_READREGDB;

    if (ret == S_OK)
    {
      ret = _xmalloc16(len, (SEGPTR*)lplpszProgID);
      if (ret == S_OK)
        strcpy(MapSL((SEGPTR)*lplpszProgID),buffer);
    }
    HeapFree(GetProcessHeap(), 0, buffer);
  }
  RegCloseKey(hkey);
  return ret;
}

/***********************************************************************
 *           LookupETask (COMPOBJ.94)
 */
HRESULT WINAPI LookupETask16(HTASK16 *hTask,LPVOID p) {
	FIXME("(%p,%p),stub!\n",hTask,p);
	if ((*hTask = GetCurrentTask()) == hETask) {
		memcpy(p, Table_ETask, sizeof(Table_ETask));
	}
	return 0;
}

/***********************************************************************
 *           SetETask (COMPOBJ.95)
 */
HRESULT WINAPI SetETask16(HTASK16 hTask, LPVOID p) {
        FIXME("(%04x,%p),stub!\n",hTask,p);
	hETask = hTask;
	return 0;
}

/***********************************************************************
 *           CALLOBJECTINWOW (COMPOBJ.201)
 */
HRESULT WINAPI CallObjectInWOW(LPVOID p1,LPVOID p2) {
	FIXME("(%p,%p),stub!\n",p1,p2);
	return 0;
}

/******************************************************************************
 *		CoRegisterClassObject	[COMPOBJ.5]
 *
 * Don't know where it registers it ...
 */
HRESULT WINAPI CoRegisterClassObject16(
	REFCLSID rclsid,
	LPUNKNOWN pUnk,
	DWORD dwClsContext, /* [in] CLSCTX flags indicating the context in which to run the executable */
	DWORD flags,        /* [in] REGCLS flags indicating how connections are made */
	LPDWORD lpdwRegister
) {
	FIXME("(%s,%p,0x%08x,0x%08x,%p),stub\n",
		debugstr_guid(rclsid),pUnk,dwClsContext,flags,lpdwRegister
	);
	return 0;
}

/******************************************************************************
 *      CoRevokeClassObject [COMPOBJ.6]
 *
 */
HRESULT WINAPI CoRevokeClassObject16(DWORD dwRegister) /* [in] token on class obj */
{
    FIXME("(0x%08x),stub!\n", dwRegister);
    return 0;
}

/******************************************************************************
 *      CoFileTimeToDosDateTime [COMPOBJ.30]
 */
BOOL16 WINAPI CoFileTimeToDosDateTime16(const FILETIME *ft, LPWORD lpDosDate, LPWORD lpDosTime)
{
    return FileTimeToDosDateTime(ft, lpDosDate, lpDosTime);
}

/******************************************************************************
 *      CoDosDateTimeToFileTime [COMPOBJ.31]
 */
BOOL16 WINAPI CoDosDateTimeToFileTime16(WORD wDosDate, WORD wDosTime, FILETIME *ft)
{
    return DosDateTimeToFileTime(wDosDate, wDosTime, ft);
}

/******************************************************************************
 *		CoRegisterMessageFilter	[COMPOBJ.27]
 */
HRESULT WINAPI CoRegisterMessageFilter16(
	LPMESSAGEFILTER lpMessageFilter,
	LPMESSAGEFILTER *lplpMessageFilter
) {
	FIXME("(%p,%p),stub!\n",lpMessageFilter,lplpMessageFilter);
	return 0;
}

/******************************************************************************
 *		CoLockObjectExternal	[COMPOBJ.63]
 */
HRESULT WINAPI CoLockObjectExternal16(
    LPUNKNOWN pUnk,		/* [in] object to be locked */
    BOOL16 fLock,		/* [in] do lock */
    BOOL16 fLastUnlockReleases	/* [in] ? */
) {
    FIXME("(%p,%d,%d),stub!\n",pUnk,fLock,fLastUnlockReleases);
    return S_OK;
}

/***********************************************************************
 *           CoGetState [COMPOBJ.115]
 */
HRESULT WINAPI CoGetState16(LPDWORD state)
{
    FIXME("(%p),stub!\n", state);

    *state = 0;
    return S_OK;
}

/***********************************************************************
 *      DllEntryPoint                   [COMPOBJ.116]
 *
 *    Initialization code for the COMPOBJ DLL
 *
 * RETURNS:
 */
BOOL WINAPI COMPOBJ_DllEntryPoint(DWORD Reason, HINSTANCE16 hInst, WORD ds, WORD HeapSize, DWORD res1, WORD res2)
{
        TRACE("(%08x, %04x, %04x, %04x, %08x, %04x)\n", Reason, hInst, ds, HeapSize, res1, res2);
        return TRUE;
}

/***********************************************************************
 *           CoMemAlloc [COMPOBJ.151]
 */
SEGPTR WINAPI CoMemAlloc(DWORD size, DWORD dwMemContext, DWORD x) {
	HRESULT		hres;
	SEGPTR		segptr;

	/* FIXME: check context handling */
	TRACE("(%d, 0x%08x, 0x%08x)\n", size, dwMemContext, x);
	hres = _xmalloc16(size, &segptr);
	if (hres != S_OK)
		return (SEGPTR)0;
	return segptr;
}

/******************************************************************************
 *		CLSIDFromProgID [COMPOBJ.61]
 *
 * Converts a program ID into the respective GUID.
 *
 * PARAMS
 *  progid       [I] program id as found in registry
 *  riid         [O] associated CLSID
 *
 * RETURNS
 *	Success: S_OK
 *  Failure: CO_E_CLASSSTRING - the given ProgID cannot be found.
 */
HRESULT WINAPI CLSIDFromProgID16(LPCOLESTR16 progid, LPCLSID riid)
{
	char	*buf,buf2[80];
	LONG	buf2len;
	HRESULT	err;
	HKEY	xhkey;

	buf = HeapAlloc(GetProcessHeap(),0,strlen(progid)+8);
	sprintf(buf,"%s\\CLSID",progid);
	if ((err=RegOpenKeyA(HKEY_CLASSES_ROOT,buf,&xhkey))) {
		HeapFree(GetProcessHeap(),0,buf);
                return CO_E_CLASSSTRING;
	}
	HeapFree(GetProcessHeap(),0,buf);
	buf2len = sizeof(buf2);
	if ((err=RegQueryValueA(xhkey,NULL,buf2,&buf2len))) {
		RegCloseKey(xhkey);
                return CO_E_CLASSSTRING;
	}
	RegCloseKey(xhkey);
	return CLSIDFromString16(buf2,riid);
}

/***********************************************************************
 *           CoGetClassObject [COMPOBJ.7]
 *
 */
HRESULT WINAPI CoGetClassObject16(
    REFCLSID rclsid, DWORD dwClsContext, COSERVERINFO *pServerInfo,
    REFIID iid, LPVOID *ppv)
{
    FIXME(", stub!\n\tCLSID:\t%s,\n\tIID:\t%s\n", debugstr_guid(rclsid), debugstr_guid(iid));

    if (pServerInfo) {
	FIXME("\tpServerInfo: name=%s\n",debugstr_w(pServerInfo->pwszName));
	FIXME("\t\tpAuthInfo=%p\n",pServerInfo->pAuthInfo);
    }
    return E_NOTIMPL;
}

/***********************************************************************
 *           CoCreateInstance [COMPOBJ.13]
 */
HRESULT WINAPI CoCreateInstance16(
	REFCLSID rclsid,
	LPUNKNOWN pUnkOuter,
	DWORD dwClsContext,
	REFIID iid,
	LPVOID *ppv)
{
  FIXME("(%s, %p, %x, %s, %p), stub!\n",
	debugstr_guid(rclsid), pUnkOuter, dwClsContext, debugstr_guid(iid),
	ppv
  );
  return E_NOTIMPL;
}

/***********************************************************************
 *           CoDisconnectObject [COMPOBJ.15]
 */
HRESULT WINAPI CoDisconnectObject16( LPUNKNOWN lpUnk, DWORD reserved )
{
  FIXME("(%p, 0x%08x): stub!\n", lpUnk, reserved);
  return E_NOTIMPL;
}

/***********************************************************************
 *           DllGetClassObject                          [OLE2.4]
 */
HRESULT WINAPI DllGetClassObject16(REFCLSID rclsid, REFIID iid, LPVOID *ppv)
{
  FIXME("(%s, %s, %p): stub\n", debugstr_guid(rclsid), debugstr_guid(iid), ppv);
  return E_NOTIMPL;
}

/******************************************************************************
 *		GetRunningObjectTable (OLE2.30)
 */
HRESULT WINAPI
GetRunningObjectTable16(DWORD reserved, LPRUNNINGOBJECTTABLE *pprot)
{
    FIXME("(%d,%p),stub!\n",reserved,pprot);
    return E_NOTIMPL;
}