htnewexe.cc

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/* 
 *      HT Editor
 *      htnewexe.cc
 *
 *      Copyright (C) 1999-2002 Stefan Weyergraf (stefan@weyergraf.de)
 *
 *      This program is free software; you can redistribute it and/or modify
 *      it under the terms of the GNU General Public License version 2 as
 *      published by the Free Software Foundation.
 *
 *      This program 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 this program; if not, write to the Free Software
 *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "htnewexe.h"

#include "mzstruct.h"
#include "htendian.h"

FILEOFS get_newexe_header_ofs(ht_streamfile *file)
{
        /* look for mz magic */
        byte mzmagic[2];
        file->seek(0);
        file->read(mzmagic, 2);
        if ((mzmagic[0] != IMAGE_MZ_MAGIC0) || (mzmagic[1] != IMAGE_MZ_MAGIC1))
                return 0;
        /* test if reloc_ofs >= 0x40 */
        word reloc_ofs;
        file->seek(24);
        file->read(&reloc_ofs, 2);
        reloc_ofs = create_host_int(&reloc_ofs, 2, little_endian);
        if (reloc_ofs && reloc_ofs < 0x40) return 0;
        /* ok seems to be a newexe */
        FILEOFS newexe_ofs;
        file->seek(60);
        file->read(&newexe_ofs, 4);
        newexe_ofs = create_host_int(&newexe_ofs, 4, little_endian);
        return newexe_ofs;
}

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