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+/* Lunzip - Decompressor for the lzip format
+ Copyright (C) 2010-2017 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 + 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 dp, const long long ds,
+ const long long mp, const long long ms,
+ const unsigned dict_size )
+ { init_block( &m->dblock, dp, ds ); init_block( &m->mblock, mp, ms );
+ m->dictionary_size = dict_size; }
+
+struct File_index
+ {
+ struct Member * member_vector;
+ char * error;
+ long long isize;
+ long members;
+ int error_size;
+ int retval;
+ };
+
+bool Fi_init( struct File_index * const fi, const int infd,
+ const bool ignore_trailing );
+
+void Fi_free( struct File_index * const fi );
+
+static inline long long Fi_udata_size( const struct File_index * const fi )
+ {
+ if( fi->members <= 0 ) return 0;
+ return block_end( fi->member_vector[fi->members-1].dblock );
+ }
+
+static inline long long Fi_cdata_size( const struct File_index * const fi )
+ {
+ if( fi->members <= 0 ) return 0;
+ return block_end( fi->member_vector[fi->members-1].mblock );
+ }
+
+ /* total size including trailing data (if any) */
+static inline long long Fi_file_size( const struct File_index * const fi )
+ { if( fi->isize >= 0 ) return fi->isize; else return 0; }
+
+static inline const struct Block * Fi_dblock( const struct File_index * const fi,
+ const long i )
+ { return &fi->member_vector[i].dblock; }
+
+static inline const struct Block * Fi_mblock( const struct File_index * const fi,
+ const long i )
+ { return &fi->member_vector[i].mblock; }
+
+static inline unsigned Fi_dictionary_size( const struct File_index * const fi,
+ const long i )
+ { return fi->member_vector[i].dictionary_size; }