75 lines
2.1 KiB
C
75 lines
2.1 KiB
C
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/*
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* Copyright (C) 2013-2022 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
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* Copyright (C) 2013 Sourcefire, Inc.
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*
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* Authors: David Raynor <draynor@sourcefire.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#ifndef CLAM_ADC_H
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#define CLAM_ADC_H
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struct adc_stream {
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uint8_t *next_in;
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size_t avail_in;
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size_t total_in;
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uint8_t *next_out;
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size_t avail_out;
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size_t total_out;
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/* internals */
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uint8_t *buffer;
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uint8_t *curr;
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uint32_t buffered;
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uint16_t state;
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uint16_t length;
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uint32_t offset;
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};
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typedef struct adc_stream adc_stream;
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#define ADC_BUFF_SIZE 65536
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#define ADC_MEM_ERROR -1
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#define ADC_DATA_ERROR -2
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#define ADC_IO_ERROR -3
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#define ADC_OK 0
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#define ADC_STREAM_END 1
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enum adc_state {
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ADC_STATE_UNINIT = 0,
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ADC_STATE_GETTYPE = 1,
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ADC_STATE_RAWDATA = 2,
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ADC_STATE_SHORTOP = 3,
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ADC_STATE_LONGOP2 = 4,
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ADC_STATE_LONGOP1 = 5,
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ADC_STATE_SHORTLOOK = 6,
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ADC_STATE_LONGLOOK = 7
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};
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/* Compression phrases
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* store phrase - 1 byte header + data, first byte 0x80-0xFF, max length 0x80 (7 bits + 1), no offset
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* short phrase - 2 byte header + data, first byte 0x00-0x3F, max length 0x12 (4 bits + 3), max offset 0x3FF (10 bits)
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* long phrase - 3 byte header + data, first byte 0x40-0x7F, max length 0x43 (6 bits + 4), max offset 0xFFFF (16 bits)
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*/
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int adc_decompressInit(adc_stream *strm);
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int adc_decompress(adc_stream *strm);
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int adc_decompressEnd(adc_stream *strm);
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#endif
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