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/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
 * AppleDouble.h
 * -------------
 *
 * The header file for a stream based apple single/double encodor/decodor.
 *
 * 2aug95    mym
 *
 */

#ifndef AppleDouble_h
#define AppleDouble_h

#include "msgCore.h"
#include "nsComposeStrings.h"
#include "nsIOutputStream.h"
#include "nsCOMPtr.h"

#include <CoreServices/CoreServices.h>

#define NOERR            0
#define errDone          1  /* Done with current operation. */
#define errEOB           2  /* End of a buffer.             */
#define errEOP           3  /* End of a Part.               */


#define errFileOpen    NS_ERROR_GET_CODE(NS_MSG_UNABLE_TO_OPEN_TMP_FILE)
#define errFileWrite   -202  /* Error writing temporary file. */
#define errUsrCancel     -2  /* MK_INTERRUPTED */
#define errDecoding      -1

/*
 ** The envirment block data type.
 */
enum
{
  kInit,
  kDoingHeaderPortion,
  kDoneHeaderPortion,
  kDoingDataPortion,
  kDoneDataPortion
};

typedef struct _appledouble_encode_object
{
  char    fname[256];
  FSIORefNum fileId;         /* the id for the open file (data/resource fork) */

  int     state;
  int     text_file_type;    /* if the file has a text file type with it.     */
  char    *boundary;         /* the boundary string.                          */

  int     status;            /* the error code if anyerror happens.           */
  char    b_overflow[200];
  int     s_overflow;

  int     state64;           /* the left over state of base64 enocding        */
  int     ct;                /* the character count of base64 encoding        */
  int     c1, c2;            /* the left of the last base64 encoding          */

  char    *outbuff;          /* the outbuff by the caller.                    */
  int     s_outbuff;         /* the size of the buffer.                       */
  int     pos_outbuff;       /* the offset in the current buffer.             */
} appledouble_encode_object;

/* The possible content transfer encodings */

enum
{
  kEncodeNone,
  kEncodeQP,
  kEncodeBase64,
  kEncodeUU
};

enum
{
  kGeneralMine,
  kAppleDouble,
  kAppleSingle
};

enum
{
  kInline,
  kDontCare
};

enum
{
  kHeaderPortion,
  kDataPortion
};

/* the decode states. */
enum
{
  kBeginParseHeader = 3,
  kParsingHeader,
  kBeginSeekBoundary,
  kSeekingBoundary,
  kBeginHeaderPortion,
  kProcessingHeaderPortion,
  kBeginDataPortion,
  kProcessingDataPortion,
  kFinishing
};

/* uuencode states */
enum
{
  kWaitingForBegin = (int) 0,
  kBegin,
  kMainBody,
  kEnd
};

typedef struct _appledouble_decode_object
{
  int     is_binary;
  int     is_apple_single;    /* if the object encoded is in apple single  */
  int     write_as_binhex;

  int     messagetype;
  char*   boundary0;          /* the boundary for the enclosure.           */
  int     deposition;         /* the deposition.                           */
  int     encoding;           /* the encoding method.                      */
  int     which_part;

  char    fname[256];
// nsIOFileStream *fileSpec;   /* the stream for data fork work.            */

  int     state;

  int     rksize;             /* the resource fork size count.             */
  int     dksize;             /* the data fork size count.                 */

  int      status;            /* the error code if anyerror happens.       */
  char     b_leftover[256];
  int      s_leftover;

  int      encode;            /* the encode type of the message.           */
  int      state64;           /* the left over state of base64 enocding    */
  int      left;              /* the character count of base64 encoding    */
  int      c[4];              /* the left of the last base64 encoding      */
  int      uu_starts_line;    /* is decoder at the start of a line? (uuencode) */
  int      uu_state;          /* state w/r/t the uuencode body */
  int      uu_bytes_written;  /* bytes written from the current tuple (uuencode) */
  int      uu_line_bytes;     /* encoded bytes remaining in the current line (uuencode) */

  char     *inbuff;           /* the outbuff by the caller.                */
  int      s_inbuff;          /* the size of the buffer.                   */
  int      pos_inbuff;        /* the offset in the current buffer.         */

  nsCOMPtr <nsIFile> tmpFile; /* the temp file to hold the decode data fork */
                              /* when doing the binhex exporting.          */
  nsCOMPtr <nsIOutputStream> tmpFileStream; /* The output File Stream      */
  int32_t  data_size;         /* the size of the data in the tmp file.     */
} appledouble_decode_object;


/*
 ** The protypes.
 */

PR_BEGIN_EXTERN_C

int ap_encode_init(appledouble_encode_object *p_ap_encode_obj,
                   const char* fname,
                   char* separator);

int ap_encode_next(appledouble_encode_object* p_ap_encode_obj,
                   char     *to_buff,
                   int32_t  buff_size,
                   int32_t* real_size);

int ap_encode_end(appledouble_encode_object* p_ap_encode_obj,
                   bool is_aborting);

int ap_decode_init(appledouble_decode_object* p_ap_decode_obj,
                   bool is_apple_single,
                   bool write_as_bin_hex,
                   void *closure);

int ap_decode_next(appledouble_decode_object* p_ap_decode_obj,
                   char    *in_buff,
                   int32_t buff_size);

int ap_decode_end(appledouble_decode_object* p_ap_decode_obj,
                  bool is_aborting);

PR_END_EXTERN_C

#endif