/*
 *  REGDB.C
 *
 *  Functions to query the registration database
 *
 *  OleStdGetMiscStatusOfClass
 *  OleStdGetDefaultFileFormatOfClass
 *  OleStdGetAuxUserType
 *  OleStdGetUserTypeOfClass
 *
 *    (c) Copyright Microsoft Corp. 1992-1993 All Rights Reserved
 *
 */

#define STRICT  1
#include "ole2ui.h"
#include "common.h"
#include <ctype.h>

OLEDBGDATA


// Replacement for stdlib atol,
// which didn't work and doesn't take far pointers.
// Must be tolerant of leading spaces.
//
//
static LONG Atol(LPSTR lpsz)
{
	signed int sign = +1;
	UINT base = 10;
	LONG l = 0;

	if (NULL==lpsz)
	{
		OleDbgAssert (0);
		return 0;
	}
	while (isspace(*lpsz))
		lpsz++;

	if (*lpsz=='-')
	{
		lpsz++;
		sign = -1;
	}
	if (lpsz[0]=='0' && lpsz[1]=='x')
	{
		base = 16;
		lpsz+=2;
	}

	if (base==10)
	{
		while (isdigit(*lpsz))
		{
			l = l * base + *lpsz - '0';
			lpsz++;
		}
	}
	else
	{
		OleDbgAssert (base==16);
		while (isxdigit(*lpsz))
		{
			l = l * base + isdigit(*lpsz) ? *lpsz - '0' : toupper(*lpsz) - 'A' + 10;
			lpsz++;
		}
	}
	return l * sign;
}



/*
 * OleStdGetUserTypeOfClass(REFCLSID, LPSTR, UINT, HKEY)
 *
 * Purpose:
 *  Returns the user type (human readable class name) of the specified class.
 *
 * Parameters:
 *  rclsid          pointer to the clsid to retrieve user type of.
 *  lpszUserType    pointer to buffer to return user type in.
 *  cch             length of buffer pointed to by lpszUserType
 *  hKey            hKey for reg db - if this is NULL, then we
 *                   open and close the reg db within this function.  If it
 *                   is non-NULL, then we assume it's a valid key to the
 *                   \ root and use it without closing it. (useful
 *                   if you're doing lots of reg db stuff).
 *
 * Return Value:
 *  UINT            Number of characters in returned string.  0 on error.
 *
 */
STDAPI_(UINT) OleStdGetUserTypeOfClass(REFCLSID rclsid, LPSTR lpszUserType, UINT cch, HKEY hKey)
{

   LONG     dw;
   LONG     lRet;
   LPSTR    lpszCLSID, lpszProgID;
   BOOL     fFreeProgID = FALSE;
   BOOL     bCloseRegDB = FALSE;
   char     szKey[128];
   LPMALLOC lpIMalloc;

   if (!lpszUserType)
	   return 0;

   *lpszUserType = '\0';
   if (hKey == NULL)
   {

	 //Open up the root key.
	 lRet=RegOpenKey(HKEY_CLASSES_ROOT, NULL, &hKey);

	 if ((LONG)ERROR_SUCCESS!=lRet)
	   return (UINT)FALSE;

	 bCloseRegDB = TRUE;
   }

   // Get a string containing the class name
   StringFromCLSID(rclsid, &lpszCLSID);

   wsprintf(szKey, "CLSID\\%s", lpszCLSID);


   dw=cch;
   lRet = RegQueryValue(hKey, szKey, lpszUserType, &dw);

   if ((LONG)ERROR_SUCCESS!=lRet) {
	   // Load 'Unknown Source' and 'Unknown Type' strings
	   dw = (LONG)LoadString(ghInst, (UINT)IDS_PSUNKNOWNTYPE, lpszUserType, cch);
   }

   if ( ((LONG)ERROR_SUCCESS!=lRet) && (CoIsOle1Class(rclsid)) )
   {
	  // We've got an OLE 1.0 class, so let's try to get the user type
	  // name from the ProgID entry.

	  ProgIDFromCLSID(rclsid, &lpszProgID);
	  fFreeProgID = TRUE;

	  dw = cch;
	  lRet = RegQueryValue(hKey, lpszProgID, lpszUserType, &dw);

	  if ((LONG)ERROR_SUCCESS != lRet)
		dw = 0;
   }


   if (NOERROR == CoGetMalloc(MEMCTX_TASK, &lpIMalloc))
   {
	   if (fFreeProgID)
		 lpIMalloc->lpVtbl->Free(lpIMalloc, (LPVOID)lpszProgID);

	   lpIMalloc->lpVtbl->Free(lpIMalloc, (LPVOID)lpszCLSID);
	   lpIMalloc->lpVtbl->Release(lpIMalloc);
   }

   if (bCloseRegDB)
	  RegCloseKey(hKey);

   return (UINT)dw;

}



/*
 * OleStdGetAuxUserType(RCLSID, WORD, LPSTR, int, HKEY)
 *
 * Purpose:
 *  Returns the specified AuxUserType from the reg db.
 *
 * Parameters:
 *  rclsid          pointer to the clsid to retrieve aux user type of.
 *  hKey            hKey for reg db - if this is NULL, then we
 *                   open and close the reg db within this function.  If it
 *                   is non-NULL, then we assume it's a valid key to the
 *                   \ root and use it without closing it. (useful
 *                   if you're doing lots of reg db stuff).
 *  wAuxUserType    which aux user type field to look for.  In 4/93 release
 *                  2 is short name and 3 is exe name.
 *  lpszUserType    pointer to buffer to return user type in.
 *  cch             length of buffer pointed to by lpszUserType
 *
 * Return Value:
 *  UINT            Number of characters in returned string.  0 on error.
 *
 */
STDAPI_(UINT) OleStdGetAuxUserType(REFCLSID rclsid,
								   UINT     wAuxUserType,
								   LPSTR    lpszAuxUserType,
								   int      cch,
								   HKEY     hKey)
{
   HKEY     hThisKey;
   BOOL     fCloseRegDB = FALSE;
   LONG     dw;
   LRESULT  lRet;
   LPSTR    lpszCLSID;
   LPMALLOC lpIMalloc;
   char     szKey[OLEUI_CCHKEYMAX];
   char     szTemp[32];

   lpszAuxUserType[0] = '\0';

   if (NULL == hKey)
   {
	  lRet = RegOpenKey(HKEY_CLASSES_ROOT, NULL, &hThisKey);

	  if (ERROR_SUCCESS != lRet)
		  return 0;
   }
   else
	  hThisKey = hKey;

   StringFromCLSID(rclsid, &lpszCLSID);

   lstrcpy(szKey, "CLSID\\");
   lstrcat(szKey, lpszCLSID);
   wsprintf(szTemp, "\\AuxUserType\\%d", wAuxUserType);
   lstrcat(szKey, szTemp);

   dw = cch;

   lRet = RegQueryValue(hThisKey, szKey, lpszAuxUserType, &dw);

   if (ERROR_SUCCESS != lRet) {
	 dw = 0;
	 lpszAuxUserType[0] = '\0';
   }


   if (fCloseRegDB)
	  RegCloseKey(hThisKey);

   if (NOERROR == CoGetMalloc(MEMCTX_TASK, &lpIMalloc))
   {
	   lpIMalloc->lpVtbl->Free(lpIMalloc, (LPVOID)lpszCLSID);
	   lpIMalloc->lpVtbl->Release(lpIMalloc);
   }

   return (UINT)dw;
}



/*
 * OleStdGetMiscStatusOfClass(REFCLSID, HKEY)
 *
 * Purpose:
 *  Returns the value of the misc status for the given clsid.
 *
 * Parameters:
 *  rclsid          pointer to the clsid to retrieve user type of.
 *  hKey            hKey for reg db - if this is NULL, then we
 *                   open and close the reg db within this function.  If it
 *                   is non-NULL, then we assume it's a valid key to the
 *                   \\CLSID root and use it without closing it. (useful
 *                   if you're doing lots of reg db stuff).
 *
 * Return Value:
 *  BOOL            TRUE on success, FALSE on failure.
 *
 */
STDAPI_(BOOL) OleStdGetMiscStatusOfClass(REFCLSID rclsid, HKEY hKey, DWORD FAR * lpdwValue)
{
   DWORD dw;
   LONG  lRet;
   LPSTR lpszCLSID;
   char  szKey[64];
   char  szMiscStatus[OLEUI_CCHKEYMAX];
   BOOL  bCloseRegDB = FALSE;

   if (hKey == NULL)
   {

	 //Open up the root key.
	 lRet=RegOpenKey(HKEY_CLASSES_ROOT, "CLSID", &hKey);

	 if ((LONG)ERROR_SUCCESS!=lRet)
	   return FALSE;

	 bCloseRegDB = TRUE;
   }

   // Get a string containing the class name
   StringFromCLSID(rclsid, &lpszCLSID);

   // Construct key
   lstrcpy(szKey, lpszCLSID);
   lstrcat(szKey, "\\MiscStatus");


   dw=OLEUI_CCHKEYMAX;
   lRet = RegQueryValue(hKey, szKey, (LPSTR)szMiscStatus, &dw);

   if ((LONG)ERROR_SUCCESS!=lRet)
   {
	   OleStdFreeString(lpszCLSID, NULL);

	   if (bCloseRegDB)
		  RegCloseKey(hKey);

	   return FALSE;

   }

   *lpdwValue = Atol((LPSTR)szMiscStatus);

   OleStdFreeString(lpszCLSID, NULL);

   if (bCloseRegDB)
	  RegCloseKey(hKey);

   return TRUE;


}


/*
 * CLIPFORMAT OleStdGetDefaultFileFormatOfClass(REFCLSID, HKEY)
 *
 * Purpose:
 *  Returns the default file format of the specified class.
 *  this is entered in REGDB as follows:
 *      CLSID\{...}\DataFormats\DefaultFile = <cfFmt>
 *
 * Parameters:
 *  rclsid          pointer to the clsid to retrieve user type of.
 *  hKey            hKey for reg db- if this is NULL, then we
 *                   open and close the reg db within this function.  If it
 *                   is non-NULL, then we assume it's a valid key to the
 *                   \ root and use it without closing it. (useful
 *                   if you're doing lots of reg db stuff).
 *
 * Return Value:
 *  cfFmt   -- DefaultFile format
 *  NULL    -- failed to get default file format
 *
 */
STDAPI_(CLIPFORMAT) OleStdGetDefaultFileFormatOfClass(
		REFCLSID        rclsid,
		HKEY            hKey
)
{
   CLIPFORMAT cfFmt = 0;
   DWORD dw;
   LONG  lRet;
   LPSTR lpszCLSID;
   BOOL  bCloseRegDB = FALSE;
   char  szKey[128];
   char  szDefaultFile[OLEUI_CCHKEYMAX];
   BOOL  bStatus = TRUE;


   if (hKey == NULL)
   {

	 //Open up the root key.
	 lRet=RegOpenKey(HKEY_CLASSES_ROOT, NULL, &hKey);

	 if ((LONG)ERROR_SUCCESS!=lRet)
	   return 0;

	 bCloseRegDB = TRUE;
   }


   // Get a string containing the class name
   StringFromCLSID(rclsid, &lpszCLSID);

   // Construct key
   wsprintf(szKey, "CLSID\\%s\\DataFormats\\DefaultFile", lpszCLSID);
   OleStdFreeString(lpszCLSID, NULL);

   dw=OLEUI_CCHKEYMAX;
   lRet = RegQueryValue(hKey, szKey, (LPSTR)szDefaultFile, (LONG FAR *)&dw);

   if ((LONG)ERROR_SUCCESS!=lRet)
	   bStatus = FALSE;
   else {
	   /* if the format is a number, then it should refer to one of the
	   **    standard Windows formats.
	   */
	   if (isdigit(szDefaultFile[0]))
		   cfFmt = (CLIPFORMAT)Atol(szDefaultFile);
	   else
		   cfFmt = RegisterClipboardFormat(szDefaultFile);
   }

   if (bCloseRegDB)
	  RegCloseKey(hKey);

   return cfFmt;
}
