1 files changed, 43 insertions, 0 deletions
diff --git a/common.h b/common.h
new file mode 100644
index 0000000..c3d0691
--- /dev/null
+++ b/common.h
@@ -0,0 +1,43 @@
+/* Lziprecover - Data recovery tool for the lzip format
+   Copyright (C) 2009-2022 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/>.
+*/
+
+struct Bad_byte
+  {
+  enum Mode { literal, delta, flip };
+  long long pos;
+  const char * option_name;
+  Mode mode;
+  uint8_t value;
+
+  Bad_byte() : pos( -1 ), option_name( 0 ), mode( literal ), value( 0 ) {}
+  uint8_t operator()( const uint8_t old_value ) const
+    {
+    if( mode == delta ) return old_value + value;
+    if( mode == flip ) return old_value ^ value;
+    return value;
+    }
+
+  void parse_bb( const char * const arg, const char * const pn );
+  };
+
+
+// defined in main_common.cc
+void show_error( const char * const msg, const int errcode = 0,
+                 const bool help = false );
+void show_file_error( const char * const filename, const char * const msg,
+                      const int errcode = 0 );
+void internal_error( const char * const msg );