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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 12:54:40 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-14 12:54:40 +0000 |
commit | 47d9004eff8861813477ed571350f7cd83ea4fd4 (patch) | |
tree | f909edd49006917e1d3cdae838ca56f5fa7fc9ff /lzip_index.h | |
parent | Initial commit. (diff) | |
download | lunzip-upstream.tar.xz lunzip-upstream.zip |
Adding upstream version 1.14.upstream/1.14upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | lzip_index.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/lzip_index.h b/lzip_index.h new file mode 100644 index 0000000..a4fbd56 --- /dev/null +++ b/lzip_index.h @@ -0,0 +1,91 @@ +/* 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; } |