denyhosts/clamav/libclamav/adc.h

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2022-10-22 18:41:00 +08:00
/*
* Copyright (C) 2013-2022 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