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zip: import initial module

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This provides rudimentary support for parsing the contents of a ZIP
file. For now this just supports uncompressed file entries but DEFLATE
support is planned. This also only implements a low level public API
so more work will be needed to make it usable by application code.

Change-Id: Ia68b3078e5276666a0e5023f4bc7a9f94272738a
This commit is contained in:
James Buren 2021-07-05 17:08:55 +00:00
parent 2acf8db3e1
commit b87e75f768
3 changed files with 770 additions and 0 deletions
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64
firmware/include/zip.h Normal file
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2021 by James Buren
*
* 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 _ZIP_H_
#define _ZIP_H_
#include <stdbool.h>
#include <stdint.h>
#include <time.h>
enum {
ZIP_PASS_SHALLOW,
ZIP_PASS_START,
ZIP_PASS_DATA,
ZIP_PASS_END,
};
struct zip;
struct zip_args {
uint16_t entry;
uint16_t entries;
char* name;
uint32_t file_size;
time_t modts;
void* block;
uint32_t block_size;
uint32_t read_size;
};
typedef int (*zip_callback) (const struct zip_args* args, int pass, void* ctx);
// open a handle for the given full file name path
struct zip* zip_open(const char* name, bool try_mem);
// quick read of only directory index
int zip_read_shallow(struct zip* z, zip_callback cb, void* ctx);
// slow read of whole archive
// this can also pickup where a successful shallow read leftoff
int zip_read_deep(struct zip* z, zip_callback cb, void* ctx);
// returns system resources
void zip_close(struct zip* z);
#endif