/*

  *  Copyright (C) 2013-2019 Cisco Systems, Inc. and/or its affiliates. All rights reserved.

  *  Copyright (C) 2013 Sourcefire, Inc.
  *
  *  Authors: David Raynor <draynor@sourcefire.com>
  *
  *  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., 51 Franklin Street, Fifth Floor, Boston,
  *  MA 02110-1301, USA.
  */

 
 #ifndef CLAM_ADC_H
 #define CLAM_ADC_H
 
 struct adc_stream {

     uint8_t *next_in;

     size_t avail_in;
     size_t total_in;
 

     uint8_t *next_out;

     size_t avail_out;
     size_t total_out;
 
     /* internals */
     uint8_t *buffer;
     uint8_t *curr;
 
     uint32_t buffered;
     uint16_t state;
     uint16_t length;
     uint32_t offset;
 };
 typedef struct adc_stream adc_stream;
 
 #define ADC_BUFF_SIZE 65536
 
 #define    ADC_MEM_ERROR -1
 #define    ADC_DATA_ERROR -2
 #define    ADC_IO_ERROR -3
 #define    ADC_OK 0
 #define    ADC_STREAM_END 1
 
 enum adc_state {
     ADC_STATE_UNINIT = 0,
     ADC_STATE_GETTYPE = 1,
     ADC_STATE_RAWDATA = 2,
     ADC_STATE_SHORTOP = 3,
     ADC_STATE_LONGOP2 = 4,
     ADC_STATE_LONGOP1 = 5,
     ADC_STATE_SHORTLOOK = 6,
     ADC_STATE_LONGLOOK = 7
 };
 
 /* Compression phrases
  * store phrase - 1 byte header + data, first byte 0x80-0xFF, max length 0x80 (7 bits + 1), no offset
  * short phrase - 2 byte header + data, first byte 0x00-0x3F, max length 0x12 (4 bits + 3), max offset 0x3FF (10 bits)
  * long phrase  - 3 byte header + data, first byte 0x40-0x7F, max length 0x43 (6 bits + 4), max offset 0xFFFF (16 bits)
  */
 
 int adc_decompressInit(adc_stream *strm);
 int adc_decompress(adc_stream *strm);
 int adc_decompressEnd(adc_stream *strm);
 
 #endif