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/***************************************************************************
* _______ _______ _______ *
* | ___ |____ | ___ | *
* | | |_| / /| | |_| *
* | |_____ / / | |_____ *
* |_____ | / / |_____ | *
* _ | | / / _ | | *
* | |___| |/ /____| |___| | *
* |_______|_______|_______| *
* *
* Wiimms SZS Tools *
* https://szs.wiimm.de/ *
* *
***************************************************************************
* *
* This file is part of the SZS project. *
* Visit https://szs.wiimm.de/ for project details and sources. *
* *
* Copyright (c) 2011-2024 by Dirk Clemens <wiimm@wiimm.de> *
* *
***************************************************************************
* *
* 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 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. *
* *
* See file gpl-2.0.txt or http://www.gnu.org/licenses/gpl-2.0.txt *
* *
***************************************************************************/
#ifndef SZS_LIB_CHECKSUM_H
#define SZS_LIB_CHECKSUM_H 1
#define _GNU_SOURCE 1
#include "dclib-types.h"
#include "lib-szs-file.h"
#include "lib-ledis.h"
#include "crypt.h"
typedef struct szs_file_t szs_file_t;
//
///////////////////////////////////////////////////////////////////////////////
/////////////// struct sha1_size_hash_t ///////////////
///////////////////////////////////////////////////////////////////////////////
// [[sha1_size_hash_t]]
#define CHECKSUM_DB_SIZE 32
///////////////////////////////////////////////////////////////////////////////
void CreateSS ( cvp data, uint size, sha1_size_hash_t *dest );
void CreateSS64 ( cvp data, uint size, sha1_size_b64_t dest );
// bufsize should be >40
void CreateSSChecksum ( char *buf, uint bufsize, const sha1_size_hash_t *ss );
void CreateSSChecksumBySZS ( char *buf, uint bufsize, const szs_file_t *szs );
// normed DB coding (independent of options)
void CreateSSChecksumDB ( char *buf, uint bufsize, const sha1_size_hash_t *ss );
void CreateSSChecksumDBByData ( char *buf, uint bufsize, cvp data, uint size );
void CreateSSChecksumDBBySZS ( char *buf, uint bufsize, const szs_file_t *szs );
void CreateSSXChecksumDBByData ( char *buf, uint bufsize, cvp data, uint size, file_format_t ff );
void CreateSSXChecksumDBBySZS ( char *buf, uint bufsize, const szs_file_t *szs );
enumError GetSSByFile ( sha1_size_hash_t *ss, ccp path1, ccp path2 );
// slen < 0 => strlen(source)
// returns: 0:fail, 1:SHA1, 2:DB64
// if res != NULL: scanned SHA1
int IsSSChecksum ( sha1_size_hash_t *res, ccp source, int slen );
//
///////////////////////////////////////////////////////////////////////////////
/////////////// szs cache support ///////////////
///////////////////////////////////////////////////////////////////////////////
#define SZS_CACHE_FNAME "cache-content.txt"
extern ccp szs_cache_dir;
extern ParamField_t szs_cache;
///////////////////////////////////////////////////////////////////////////////
void LogCacheActivity ( ccp keyword, ccp format, ... )
__attribute__ ((__format__(__printf__,2,3)));
static inline bool IsSZSCacheEnabled()
{ return szs_cache_dir != 0; }
void SetupSZSCache ( ccp dir_name, bool use_dirname );
void ScanSZSCache ( ccp dir_name, bool purge );
enumError LoadSZSCache(void);
enumError SaveSZSCache ( bool force );
enumError AppendSZSCache(void);
ParamFieldItem_t * StoreSZSCache
(
// return NULL or pointer to cache item
ccp fname, // NULL or filename, only basename(fname) is used
ccp checksum, // DB checksum; if NULL: load file and calc checksum
bool rename_file, // true: rename existing file
bool *r_exists // not NULL: store a status here
// => true: file result->data exists
);
//-----------------------------------------------------------------------------
// [[check_cache_t]]
typedef struct check_cache_t
{
file_format_t fform;
bool found; // true, if file found in cache
char csum[CHECKSUM_DB_SIZE+4];
// checksum with suffix
szs_file_t cache; // file loaded from cache, valid if found==true
}
check_cache_t;
void ResetCheckCache ( check_cache_t *cc );
bool CheckSZSCache
(
// returns true if file found in cache (same as cc->found)
check_cache_t *cc, // initialized by CheckSZSCache()
szs_file_t *szs, // related SZS file
cvp data, // data
uint size, // size of 'data'
file_format_t fform, // compression format
ccp ext // wanted file extension including leading '.'
);
bool CheckSZSCacheSZS
(
// returns true if file found in cache (same as cc->found)
szs_file_t *szs, // related SZS file
file_format_t fform, // compression format
ccp ext, // wanted file extension including leading '.'
bool rm_uncompressed // true: remove uncompressed data if cache is used
);
//
///////////////////////////////////////////////////////////////////////////////
/////////////// END ///////////////
///////////////////////////////////////////////////////////////////////////////
#endif // SZS_LIB_CHECKSUM_H
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