1 files changed, 90 insertions, 0 deletions
diff --git a/file_index.h b/file_index.h
new file mode 100644
index 0000000..38f0246
--- /dev/null
+++ b/file_index.h
@@ -0,0 +1,90 @@
+/*  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; }