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inflate: import initial module for deflate decompression

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This will eventually be used by the ZIP module and other things
that support DEFLATE based streams.

Change-Id: I4acc9561eb56c9c368d1defab9c14e0454d105e1
This commit is contained in:
James Buren 2021-08-05 15:57:07 +00:00 • committed by William Wilgus
parent 603e749c1d
commit 60933d98c6
3 changed files with 806 additions and 0 deletions
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46
firmware/include/inflate.h Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 by James Buren (libflate adaptations for RockBox)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _INFLATE_H_
#define _INFLATE_H_
#include <stdint.h>
enum {
INFLATE_RAW,
INFLATE_ZLIB,
INFLATE_GZIP,
};
struct inflate;
typedef uint32_t inflate_reader(void* block, uint32_t block_size, void* ctx);
typedef uint32_t inflate_writer(const void* block, uint32_t block_size, void* ctx);
extern const uint32_t inflate_size;
extern const uint32_t inflate_align;
// 'it' must be allocated by the caller. it must be at least 'inflate_size' bytes
// and aligned at 'inflate_align' bytes. 'st' is the type of stream to decompress;
// see above enum for possible options.
int inflate(struct inflate* it, int st, inflate_reader read, void* rctx, inflate_writer write, void* wctx);
#endif