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+/* Plzip - A parallel compressor compatible with lzip
+ Copyright (C) 2009, 2010, 2011, 2012, 2013 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 3 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
+
+
+class Block
+ {
+ long long pos_, size_; // pos + size <= INT64_MAX
+
+public:
+ Block( const long long p, const long long s ) : pos_( p ), size_( s ) {}
+
+ long long pos() const { return pos_; }
+ long long size() const { return size_; }
+ long long end() const { return pos_ + size_; }
+
+ void pos( const long long p ) { pos_ = p; }
+ void size( const long long s ) { size_ = s; }
+
+ bool overlaps( const Block & b ) const
+ { return ( pos_ < b.end() && b.pos_ < end() ); }
+ void shift( Block & b ) { ++size_; ++b.pos_; --b.size_; }
+ };
+
+
+class File_index
+ {
+ struct Member
+ {
+ Block dblock, mblock; // data block, member block
+
+ Member( const long long dp, const long long ds,
+ const long long mp, const long long ms )
+ : dblock( dp, ds ), mblock( mp, ms ) {}
+ };
+
+ std::vector< Member > member_vector;
+ std::string error_;
+ int retval_;
+
+public:
+ File_index( const int infd );
+
+ const std::string & error() const { return error_; }
+ int retval() const { return retval_; }
+
+ long long data_end() const
+ { if( member_vector.size() ) return member_vector.back().dblock.end();
+ else return 0; }
+
+ long long file_end() const
+ { if( member_vector.size() ) return member_vector.back().mblock.end();
+ else return 0; }
+
+ const Block & dblock( const int i ) const
+ { return member_vector[i].dblock; }
+ const Block & mblock( const int i ) const
+ { return member_vector[i].mblock; }
+ int members() const { return (int)member_vector.size(); }
+ };