Re: About writing data

[WangRain]

Thanks Logan; 
but i very confuse when i rewrite all the codes, the data can't be written into 
database,please help;

codes:

//get record size
static UInt16 GetRecordSize (TestType *testPtr)
{
        UInt16 size = 0;

        if (!testPtr)
        {
                return size;
        }
        
        size = sizeof (TestType);
        
        if (testPtr->name != NULL)
        {
                size += StrLen (testPtr->name) + 1;
        }
        if (testPtr->path != NULL)
        {
                size +=  StrLen (testPtr->path) + 1;
        }
        
        if (testPtr->testSubList != NULL)
        {
                size += (sizeof (UInt32)*4 + StrLen 
(testPtr->testSubList->dbName) + 1)* testPtr->dbNum;
        }
                
        size += sizeof (FileRef);
        size += sizeof (UInt32);
        size += sizeof (UInt32);

        return size;
}

//copy
static void CopyRecord(TestType *dstPtr, TestType * scrPtr)
{
        
        UInt16  size = 0;
        UInt32  offset = 0;

        offset = 0;
        if (scrPtr->name != NULL)
        {
                size = StrLen (scrPtr->name) + 1;
                DmWrite(dstPtr, offset, scrPtr->name, size);
                offset += size;
        }

        if (scrPtr->path != NULL)
        {
                size = StrLen (scrPtr->path) + 1;
                DmWrite (dstPtr, offset, scrPtr->path, size);
                offset += size;
        }
        
        size = sizeof (FileRef);
        DmWrite (dstPtr, offset, &scrPtr->fileRef, size);
        offset += size;
        
        size = sizeof (UInt32);
        DmWrite (dstPtr, offset, &scrPtr->fileSize, size);
        offset += size;
        
        size = sizeof (UInt32);
        DmWrite (dstPtr, offset, &scrPtr->dbNum, size);
        offset += size;
        
        if (scrPtr->testSubList != NULL)
        for (UInt16 i = 0; i < scrPtr->dbNum; i++)
        {
                size +=  StrLen (scrPtr->testSubList->dbName) + 1;
                DmWrite (dstPtr, offset, scrPtr->testSubList->dbName, size);
                offset += size;
                
                size = sizeof (UInt32);
                DmWrite (dstPtr, offset, &scrPtr->testSubList->dbCreator, size);
                offset += size;
                
                DmWrite (dstPtr, offset, &scrPtr->testSubList->dbType, size);
                offset += size;
                
                DmWrite (dstPtr, offset, &scrPtr->testSubList->dbSize, size);
                offset += size;
                
                DmWrite (dstPtr, offset, &scrPtr->testSubList->startPosition, 
size);
        
        }
}

//add record
static Err AddNewRecord(DmOpenRef dbP, TestType *testPtr, UInt16 *index)
{
        MemHandle recordH;
        TestType* recordP;
        UInt16                                  newIndex;
        Err err;

        
        // Make a new chunk with the correct size.
        UInt16 size = GetRecordSize (testPtr);
        recordH = DmNewHandle (dbP, (UInt32) size);
        if (recordH == NULL)
        {
                return dmErrMemError;
        }
        recordP = (TestType* )MemHandleLock (recordH);
        
        // Copy the data from the unpacked record to the packed one.
        CopyRecord(recordP, testPtr);
        
        newIndex = FindSortPosition(dbP, recordP);

        MemPtrUnlock (recordP);
        
        err = DmAttachRecord(dbP, &newIndex, recordH, 0);
        if (err) 
        {
                MemHandleFree(recordH);
        }
        else
        {
                *index = newIndex;
        }
        return err;
}

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