workbench/classes/datatypes/degas/checker.c

   1 /*
   2
   3 Author: Neil Cafferkey
   4 Copyright (C) 2003 Neil Cafferkey
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  19 MA 02111-1307, USA.
  20
  21 */
  22
  23 #include <exec/types.h>
  24 #include <datatypes/datatypes.h>
  25
  26 #include "datatype.h"
  27
  28
  29 #define HEADER_SIZE 34
  30
  31
  32
  33 BOOL Main(struct DTHookContext *context REG("a0"))
  34 {
  35    BOOL success = TRUE;
  36    UWORD *buffer, i;
  37
  38    if(context->dthc_BufferLength < HEADER_SIZE)
  39       success = FALSE;
  40    if(success)
  41    {
  42       buffer = (UWORD *)context->dthc_Buffer;
  43       if((BEWord(*buffer++) & ~0x8003) != 0)
  44          success = FALSE;
  45    }
  46
  47    return success;
  48 }
  49
  50
  51