/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Netscape Public License
 * Version 1.1 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/NPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or 
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the NPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the NPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
/*--------------------------------------------------------------
 * GDIFF.H
 *
 * Constants used in processing the GDIFF format
 *--------------------------------------------------------------*/


#include "prio.h"
#include "nsFileSpec.h"

#define GDIFF_MAGIC         "\xD1\xFF\xD1\xFF"
#define GDIFF_MAGIC_LEN     4
#define GDIFF_VER           5
#define GDIFF_EOF           "\0"

#define GDIFF_VER_POS       4
#define GDIFF_CS_POS        5
#define GDIFF_CSLEN_POS     6

#define GDIFF_HEADERSIZE    7
#define GDIFF_APPDATALEN    4

#define GDIFF_CS_NONE       0
#define GDIFF_CS_MD5        1
#define GDIFF_CS_SHA        2
#define GDIFF_CS_CRC32      32

#define CRC32_LEN           4

/*--------------------------------------
 *  GDIFF opcodes
 *------------------------------------*/
#define ENDDIFF     0
#define ADD8MAX     246
#define ADD16       247
#define ADD32       248
#define COPY16BYTE  249
#define COPY16SHORT 250
#define COPY16LONG  251
#define COPY32BYTE  252
#define COPY32SHORT 253
#define COPY32LONG  254
#define COPY64      255

/* instruction sizes */
#define ADD16SIZE           2
#define ADD32SIZE           4
#define COPY16BYTESIZE      3
#define COPY16SHORTSIZE     4
#define COPY16LONGSIZE      6
#define COPY32BYTESIZE      5
#define COPY32SHORTSIZE     6
#define COPY32LONGSIZE      8
#define COPY64SIZE          12


/*--------------------------------------
 *  error codes
 *------------------------------------*/
#define GDIFF_OK                0
#define GDIFF_ERR_UNKNOWN       -1
#define GDIFF_ERR_ARGS          -2
#define GDIFF_ERR_ACCESS        -3
#define GDIFF_ERR_MEM           -4
#define GDIFF_ERR_HEADER        -5
#define GDIFF_ERR_BADDIFF       -6
#define GDIFF_ERR_OPCODE        -7
#define GDIFF_ERR_OLDFILE       -8
#define GDIFF_ERR_CHKSUMTYPE    -9
#define GDIFF_ERR_CHECKSUM      -10
#define GDIFF_ERR_CHECKSUM_TARGET  -11
#define GDIFF_ERR_CHECKSUM_RESULT  -12


/*--------------------------------------
 *  types
 *------------------------------------*/
#ifndef AIX
#ifdef OSF1
#include <sys/types.h>
#else
typedef unsigned char uchar;
#endif
#endif

typedef struct _diffdata {
    PRFileDesc*	fSrc;
    PRFileDesc*	fOut;
    PRFileDesc*	fDiff;
    uint8       checksumType;
    uint8       checksumLength;
    uchar*      oldChecksum;
    uchar*      newChecksum;
    PRBool      bMacAppleSingle;
    PRBool      bWin32BoundImage;
    uchar*      databuf;
    uint32      bufsize;
} DIFFDATA;

typedef DIFFDATA* pDIFFDATA;


/*--------------------------------------
 *  miscellaneous
 *------------------------------------*/

#define APPFLAG_W32BOUND        "autoinstall:Win32PE"
#define APPFLAG_APPLESINGLE     "autoinstall:AppleSingle"

#ifndef TRUE
  #define TRUE  1
#endif

#ifndef FALSE
  #define FALSE 0
#endif