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/* SPDX-License-Identifier: BSD-3-Clause */
/*
* Copyright (c) 2015-2016, Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder(s) nor the names of any contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* LZVN low-level decoder (v2)
* Functions in the low-level API should switch to these at some point.
* Apr 2014
*/
#ifndef LZVN_DECODE_BASE_H
#define LZVN_DECODE_BASE_H
#include "lzfse_internal.h"
/*! @abstract Base decoder state. */
typedef struct {
/* Decoder I/O */
/* Next byte to read in source buffer */
const unsigned char *src;
/* Next byte after source buffer */
const unsigned char *src_end;
/* Next byte to write in destination buffer (by decoder) */
unsigned char *dst;
/* Valid range for destination buffer is [dst_begin, dst_end - 1] */
unsigned char *dst_begin;
unsigned char *dst_end;
/* Next byte to read in destination buffer (modified by caller) */
unsigned char *dst_current;
/* Decoder state */
/*
* Partially expanded match, or 0,0,0.
* In that case, src points to the next literal to copy, or the next
* op-code if L==0.
*/
size_t L, M, D;
/* Distance for last emitted match, or 0 */
lzvn_offset d_prev;
/* Did we decode end-of-stream? */
int end_of_stream;
} lzvn_decoder_state;
/*! @abstract Decode source to destination.
* Updates \p state (src,dst,d_prev).
*/
void lzvn_decode(lzvn_decoder_state *state);
#endif /* LZVN_DECODE_BASE_H */
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