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/* Lunzip - Decompressor for the lzip format
Copyright (C) 2010-2024 Antonio Diaz Diaz.
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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef INT64_MAX
#define INT64_MAX 0x7FFFFFFFFFFFFFFFLL
#endif
struct Block
{
long long pos, size; /* pos >= 0, size >= 0, pos + size <= INT64_MAX */
};
static inline void init_block( struct Block * const b,
const long long p, const long long s )
{ b->pos = p; b->size = s; }
static inline long long block_end( const struct Block b )
{ return b.pos + b.size; }
struct Member
{
struct Block dblock, mblock; /* data block, member block */
unsigned dictionary_size;
};
static inline void init_member( struct Member * const m,
const long long dpos, const long long dsize,
const long long mpos, const long long msize,
const unsigned dict_size )
{ init_block( &m->dblock, dpos, dsize ); init_block( &m->mblock, mpos, msize );
m->dictionary_size = dict_size; }
struct Lzip_index
{
struct Member * member_vector;
char * error;
long long insize;
long members;
int error_size;
int retval;
unsigned dictionary_size; /* largest dictionary size in the file */
};
bool Li_init( struct Lzip_index * const li, const int infd,
const struct Cl_options * const cl_opts );
void Li_free( struct Lzip_index * const li );
static inline long long Li_udata_size( const struct Lzip_index * const li )
{
if( li->members <= 0 ) return 0;
return block_end( li->member_vector[li->members-1].dblock );
}
static inline long long Li_cdata_size( const struct Lzip_index * const li )
{
if( li->members <= 0 ) return 0;
return block_end( li->member_vector[li->members-1].mblock );
}
/* total size including trailing data (if any) */
static inline long long Li_file_size( const struct Lzip_index * const li )
{ if( li->insize >= 0 ) return li->insize; else return 0; }
static inline const struct Block * Li_dblock( const struct Lzip_index * const li,
const long i )
{ return &li->member_vector[i].dblock; }
static inline const struct Block * Li_mblock( const struct Lzip_index * const li,
const long i )
{ return &li->member_vector[i].mblock; }
static inline unsigned Li_dictionary_size( const struct Lzip_index * const li,
const long i )
{ return li->member_vector[i].dictionary_size; }
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