//
// GetDataCrc
//
// Get the crc of the mission data
//
U32 Mission::GetDataCrc() const
{
// Setup the crc stream for this mission
SetupStream(STREAM_CRC);
// Save the currently active stream
const char * oldStream = FileSys::GetActiveStream();
// Activate our stream
FileSys::SetActiveStream(STREAM_CRC);
// Use a running crc
U32 crc = 0;
// Add all key files
AddFileCrc(Game::FILENAME_MISSION_CONFIG, crc);
AddFileCrc(Game::FILENAME_MISSION_OBJECTS, crc);
AddFileCrc(Game::FILENAME_MISSION_TERRAIN, crc);
// Restore the old active stream
FileSys::SetActiveStream(oldStream);
// Delete the preview stream
FileSys::DeleteStream(STREAM_CRC);
// Return the resulting crc
return (crc);
}
PUBLIC Stream *
Open(
Object * object,
string name,
word mode )
{
word rc = Err_Null;
Stream *stream = NULL;
MCB *mcb;
IOCReply1 *rep;
word stlen;
Port reply;
#ifdef SYSDEB
SysDebug(ioc)("Open(%O,%N,%x)",object,name,mode);
#endif
if( CheckObject(object,C_Locate) != Err_Null ) return Null(Stream);
reply = NewPort();
mcb = NewMsgBuf(0);
rep = (IOCReply1 *)mcb->Control;
InitMCB(mcb,MsgHdr_Flags_preserve,
MyTask->IOCPort,reply,FC_GSP|FG_Open|object->FnMod);
MarshalCommon(mcb,object,name);
MarshalWord(mcb,mode);
if( (rc = IOCMsg(mcb,NULL)) < Err_Null ) goto Done;
stlen = sizeof(Stream) + (word)strlen(mcb->Data+rep->Pathname) + SafetyMargin;
stream = (Stream *)Malloc(stlen);
if( stream == NULL )
{
rc = EC_Error|SS_SysLib|EG_NoMemory|EO_Stream;
goto Done;
}
else memclr( (void *)stream, (int)stlen );
if( SetupStream( stream, mcb ) )
{
stream->Flags |= mode&Flags_SaveMode;
InitSemaphore( &stream->Mutex, 1 );
stream->Pos = 0;
}
AddStream( stream );
rc = Err_Null;
if( mode & Flags_Append ) Seek(stream, S_End, 0);
Done:
#ifdef SYSDEB
SysDebug(ioc)("Open: %E stream: %S",rc,stream);
#endif
FreeMsgBuf(mcb);
if( rc < Err_Null ) FreePort(reply);
object->Result2 = rc;
return stream;
}
