summaryrefslogtreecommitdiffstats
path: root/lzip_index.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 12:54:40 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-14 12:54:40 +0000
commit47d9004eff8861813477ed571350f7cd83ea4fd4 (patch)
treef909edd49006917e1d3cdae838ca56f5fa7fc9ff /lzip_index.h
parentInitial commit. (diff)
downloadlunzip-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.h91
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; }