E:/uas2/Server/DatFile.h

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/*
* This file is part of UAS2.
*
* UAS2 is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* UAS2 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 General Public License for more details.

* You should have received a copy of the GNU General Public License
* along with UASv1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

/* Special thanks to David Simpson for his work on the cell.dat and portal.dat extraction code */

#ifndef __DATFILE_H
#define __DATFILE_H

#pragma warning(disable:4786)   //warning: identifier was truncated to '255' characters in the browser information

#include <winsock2.h>
#include <list>
#include <algorithm>

#include "Avatar.h"

#define CELLSECSIZE             64
#define PORTALSECSIZE   256
#define NUMFILELOC              0x03F
#define ROOTDIRPTRLOC   0x148

class cPortalDat
{

public:
        
        static void             LoadStartingInfo        ( cAvatar *pcAvatar );
        static void             LoadItemModel           ( cObject *pcObject, DWORD dwModelID, DWORD dwColorID = 0, double dblColorValue = -1 );
        static int              CalcPalette                     ( int numPalettes, double palValue = -1 );

        static inline void Load_PortalDat( UCHAR* &buf, char file[9] )
        {
                FILE    *inFile;
                int             read;
                UINT    rootDirPtr;
                UINT    filePos, len;
                UINT    id;

                inFile = fopen("portal.dat", "rb");
                if (inFile == NULL)
                {
                        UpdateConsole(" Portal.dat: Open failed.\r\n");
                //      return -1;
                }

                read = fseek(inFile, ROOTDIRPTRLOC, SEEK_SET);
                if (read != 0)
                {
                        UpdateConsole(" Portal.dat: Read error.\r\n");
                        fclose(inFile);
                //      return -1;
                }

                read = fread(&rootDirPtr, sizeof(UINT), 1, inFile);
                if (read != 1)
                {
                        UpdateConsole(" Portal.dat: End of file reached.\r\n");
                        fclose(inFile);
                //      return 0;
                }

                id = strtol(file, NULL, 16);

                if (!FetchPortalFilePos(inFile, rootDirPtr, id, &filePos, &len))
                {
                        UpdateConsole(" Portal.dat: File not found.\r\n");
                //      return -1;
                }

                buf = (UCHAR *)malloc(len);
                if (!FetchPortalFile(inFile, filePos, len, buf))
                {
                        free(buf);
                        fclose(inFile);
                //      return -1;
                }

                //free(buf);
                fclose(inFile);
        }

private:

        static inline int FetchPortalFilePos(FILE *inFile, UINT dirPos, UINT id, UINT *filePos, UINT *len)
        {

                UINT dir[PORTALSECSIZE];
                UINT i;
                UINT numFiles;
                int  read;

                while (1)
                {
                        if (dirPos == 0)
                        {
                                UpdateConsole(" Portal.dat: NULL directory entry found.\r\n");
                                return 0;
                        }

                        read = fseek(inFile, dirPos, SEEK_SET);
                        if (read != 0)
                        {
                                UpdateConsole(" Portal.dat: Sector is beyond end of file.\r\n");
                                return 0;
                        }

                        read = fread(dir, sizeof(UINT), PORTALSECSIZE, inFile);
                        if (read != PORTALSECSIZE)
                        {
                                UpdateConsole(" Portal.dat: Sector doesn't contain enough words.\r\n");
                                return 0;
                        }

                        numFiles = dir[NUMFILELOC];
                        if (numFiles >= NUMFILELOC)
                        {
                                UpdateConsole(" Portal.dat: Number of files exceeds directory entries.\r\n");
                                return 0;
                        }

                        i = 0;
                        while ((i < numFiles) && (id > dir[i * 3 + NUMFILELOC + 1]))
                        {
                                i++;
                        }
                        if (i < numFiles)
                        {
                                if (id == dir[i * 3 + NUMFILELOC + 1])
                                {
                                        *filePos = dir[i * 3 + NUMFILELOC + 2];
                                        *len = dir[i * 3 + NUMFILELOC + 3];
                                        return 1;
                                }
                        }

                        if (dir[1] == 0)
                        {
                                filePos = 0;
                                len = 0;
                                return 0;
                        }
                        dirPos = dir[i + 1];
                }

                return 0;
        }

        static inline int FetchPortalFile(FILE *inFile, UINT filePos, UINT len, UCHAR *buf)
        {
                int  read, doChain;
                UINT sec[PORTALSECSIZE];

                if (filePos == 0)
                {
                        UpdateConsole(" Portal.dat: Null file pointer found.\r\n");
                        return 0;
                }

                doChain = 1;
                while (doChain)
                {

                        read = fseek(inFile, filePos, SEEK_SET);
                        if (read != 0)
                        {
                                UpdateConsole(" Portal.dat: Seek failed.\r\n");
                                return 0;
                        }
                        read = fread(sec, sizeof(UINT), PORTALSECSIZE, inFile);
                        if (read != PORTALSECSIZE)
                        {
                                UpdateConsole(" Portal.dat: Sector doesn't contain enough words.\r\n");
                                return 0;
                        }
    
                        filePos = sec[0] & 0x7FFFFFFF;

                        if (len > (PORTALSECSIZE  - 1) * sizeof(UINT))
                        {
                                memcpy(buf, &sec[1], (PORTALSECSIZE - 1) * sizeof(UINT));
                                buf += (PORTALSECSIZE - 1) * sizeof(UINT);
                                len -= (PORTALSECSIZE - 1) * sizeof(UINT);
                        } else {
                                memcpy(buf, &sec[1], len);
                                len = 0;
                        }

                        if (filePos == 0)
                                doChain = 0;
                }

                return 1;
        }
};

#endif  // #ifndef __DATFILE_H

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