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Annotation of mstools/ole20/samples/ole2ui/regdb.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *  REGDB.C
        !             3:  *
        !             4:  *  Functions to query the registration database
        !             5:  *
        !             6:  *  OleStdGetMiscStatusOfClass
        !             7:  *  OleStdGetDefaultFileFormatOfClass
        !             8:  *
        !             9:  *  NOTE: more regdb functions are in geticon.c --
        !            10:  *      OleStdGetAuxUserType
        !            11:  *      OleStdGetUserTypeOfClass
        !            12:  *
        !            13:  *    (c) Copyright Microsoft Corp. 1992-1993 All Rights Reserved
        !            14:  *
        !            15:  */
        !            16: 
        !            17: #define STRICT  1
        !            18: #include "ole2ui.h"   
        !            19: #include <ctype.h>
        !            20: 
        !            21: OLEDBGDATA
        !            22: 
        !            23: 
        !            24: // Replacement for stdlib atol, 
        !            25: // which didn't work and doesn't take far pointers.
        !            26: // Must be tolerant of leading spaces.
        !            27: // 
        !            28: //
        !            29: static LONG Atol(LPSTR lpsz)
        !            30: {
        !            31:     signed int sign = +1;
        !            32:     UINT base = 10;
        !            33:     LONG l = 0;
        !            34: 
        !            35:     if (NULL==lpsz)
        !            36:     {
        !            37:         OleDbgAssert (0);
        !            38:         return 0;
        !            39:     }
        !            40:     while (isspace(*lpsz))
        !            41:         lpsz++;
        !            42:     
        !            43:     if (*lpsz=='-')
        !            44:     {
        !            45:         lpsz++;
        !            46:         sign = -1;
        !            47:     }      
        !            48:     if (lpsz[0]=='0' && lpsz[1]=='x')
        !            49:     {
        !            50:         base = 16;  
        !            51:         lpsz+=2;
        !            52:     }
        !            53: 
        !            54:     if (base==10)
        !            55:     {
        !            56:         while (isdigit(*lpsz))
        !            57:         {
        !            58:             l = l * base + *lpsz - '0';
        !            59:             lpsz++;
        !            60:         }
        !            61:     }
        !            62:     else
        !            63:     {
        !            64:         OleDbgAssert (base==16);
        !            65:         while (isxdigit(*lpsz))
        !            66:         {
        !            67:             l = l * base + isdigit(*lpsz) ? *lpsz - '0' : toupper(*lpsz) - 'A' + 10;
        !            68:             lpsz++;
        !            69:         }
        !            70:     }
        !            71:     return l * sign;
        !            72: }
        !            73: 
        !            74: 
        !            75: 
        !            76: 
        !            77: /*
        !            78:  * OleStdGetMiscStatusOfClass(REFCLSID, HKEY)
        !            79:  *
        !            80:  * Purpose:
        !            81:  *  Returns the value of the misc status for the given clsid.
        !            82:  *
        !            83:  * Parameters:
        !            84:  *  rclsid          pointer to the clsid to retrieve user type of.
        !            85:  *  hKey            hKey for reg db - if this is NULL, then we
        !            86:  *                   open and close the reg db within this function.  If it 
        !            87:  *                   is non-NULL, then we assume it's a valid key to the 
        !            88:  *                   \\CLSID root and use it without closing it. (useful 
        !            89:  *                   if you're doing lots of reg db stuff).
        !            90:  *
        !            91:  * Return Value:
        !            92:  *  BOOL            TRUE on success, FALSE on failure.
        !            93:  *
        !            94:  */
        !            95: STDAPI_(BOOL) OleStdGetMiscStatusOfClass(REFCLSID rclsid, HKEY hKey, DWORD FAR * lpdwValue)
        !            96: {
        !            97:    DWORD dw;
        !            98:    LONG  lRet;
        !            99:    LPSTR lpszCLSID;
        !           100:    char  szKey[64];
        !           101:    char  szMiscStatus[OLEUI_CCHKEYMAX];
        !           102:    BOOL  bCloseRegDB = FALSE;
        !           103: 
        !           104:    if (hKey == NULL)
        !           105:    {
        !           106: 
        !           107:      //Open up the root key.
        !           108:      lRet=RegOpenKey(HKEY_CLASSES_ROOT, "CLSID", &hKey);
        !           109: 
        !           110:      if ((LONG)ERROR_SUCCESS!=lRet)
        !           111:        return FALSE;
        !           112: 
        !           113:      bCloseRegDB = TRUE;
        !           114:    }
        !           115: 
        !           116:    // Get a string containing the class name 
        !           117:    StringFromCLSID(rclsid, &lpszCLSID);
        !           118: 
        !           119:    // Construct key
        !           120:    lstrcpy(szKey, lpszCLSID);
        !           121:    lstrcat(szKey, "\\MiscStatus");
        !           122: 
        !           123: 
        !           124:    dw=OLEUI_CCHKEYMAX;
        !           125:    lRet = RegQueryValue(hKey, szKey, (LPSTR)szMiscStatus, &dw);
        !           126: 
        !           127:    if ((LONG)ERROR_SUCCESS!=lRet)
        !           128:    {
        !           129:        OleStdFreeString(lpszCLSID, NULL);
        !           130: 
        !           131:        if (bCloseRegDB)
        !           132:           RegCloseKey(hKey);
        !           133: 
        !           134:        return FALSE;
        !           135: 
        !           136:    }
        !           137: 
        !           138:    *lpdwValue = Atol((LPSTR)szMiscStatus);
        !           139: 
        !           140:    OleStdFreeString(lpszCLSID, NULL);
        !           141: 
        !           142:    if (bCloseRegDB)
        !           143:       RegCloseKey(hKey);
        !           144: 
        !           145:    return TRUE;
        !           146: 
        !           147: 
        !           148: }
        !           149: 
        !           150: 
        !           151: /*
        !           152:  * CLIPFORMAT OleStdGetDefaultFileFormatOfClass(REFCLSID, HKEY)
        !           153:  *
        !           154:  * Purpose:
        !           155:  *  Returns the default file format of the specified class.
        !           156:  *  this is entered in REGDB as follows:
        !           157:  *      CLSID\{...}\DataFormats\DefaultFile = <cfFmt>
        !           158:  *
        !           159:  * Parameters:
        !           160:  *  rclsid          pointer to the clsid to retrieve user type of.
        !           161:  *  hKey            hKey for reg db- if this is NULL, then we
        !           162:  *                   open and close the reg db within this function.  If it 
        !           163:  *                   is non-NULL, then we assume it's a valid key to the 
        !           164:  *                   \ root and use it without closing it. (useful 
        !           165:  *                   if you're doing lots of reg db stuff).
        !           166:  *
        !           167:  * Return Value:
        !           168:  *  cfFmt   -- DefaultFile format
        !           169:  *  NULL    -- failed to get default file format
        !           170:  *
        !           171:  */
        !           172: STDAPI_(CLIPFORMAT) OleStdGetDefaultFileFormatOfClass(
        !           173:         REFCLSID        rclsid, 
        !           174:         HKEY            hKey
        !           175: )       
        !           176: {
        !           177:    CLIPFORMAT cfFmt = 0;
        !           178:    DWORD dw;
        !           179:    LONG  lRet;
        !           180:    LPSTR lpszCLSID;
        !           181:    BOOL  bCloseRegDB = FALSE;
        !           182:    char  szKey[128];
        !           183:    char  szDefaultFile[OLEUI_CCHKEYMAX];
        !           184:    BOOL  bStatus = TRUE;
        !           185: 
        !           186: 
        !           187:    if (hKey == NULL)
        !           188:    {
        !           189: 
        !           190:      //Open up the root key.
        !           191:      lRet=RegOpenKey(HKEY_CLASSES_ROOT, NULL, &hKey);
        !           192: 
        !           193:      if ((LONG)ERROR_SUCCESS!=lRet)
        !           194:        return 0;
        !           195: 
        !           196:      bCloseRegDB = TRUE;
        !           197:    }
        !           198: 
        !           199: 
        !           200:    // Get a string containing the class name 
        !           201:    StringFromCLSID(rclsid, &lpszCLSID);
        !           202: 
        !           203:    // Construct key
        !           204:    wsprintf(szKey, "CLSID\\%s\\DataFormats\\DefaultFile", lpszCLSID);
        !           205: 
        !           206:    dw=OLEUI_CCHKEYMAX;
        !           207:    lRet = RegQueryValue(hKey, szKey, (LPSTR)szDefaultFile, (LONG FAR *)&dw);
        !           208: 
        !           209:    if ((LONG)ERROR_SUCCESS!=lRet)
        !           210:        bStatus = FALSE;
        !           211:    else {
        !           212:        /* if the format is a number, then it should refer to one of the
        !           213:        **    standard Windows formats.
        !           214:        */
        !           215:        if (isdigit(szDefaultFile[0])) 
        !           216:            cfFmt = (CLIPFORMAT)Atol(szDefaultFile);
        !           217:        else 
        !           218:            cfFmt = RegisterClipboardFormat(szDefaultFile);
        !           219:    }
        !           220: 
        !           221:    if (bCloseRegDB)
        !           222:       RegCloseKey(hKey);
        !           223: 
        !           224:    return cfFmt;
        !           225: }
        !           226: 

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