Merging upstream version 0.8.

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>

1 files changed, 9 insertions, 5 deletions

diff --git a/lzd.cc b/lzd.cc
index 30dde48..5f8dcdc 100644
--- a/lzd.cc
+++ b/lzd.cc
@@ -1,5 +1,5 @@
 /*  Lzd - Educational decompressor for the lzip format
-    Copyright (C) 2013-2015 Antonio Diaz Diaz.
+    Copyright (C) 2013-2016 Antonio Diaz Diaz.
 
     This program is free software: you have unlimited permission
     to copy, distribute and modify it.
@@ -52,6 +52,7 @@ enum {
   min_dictionary_size = 1 << 12,
   max_dictionary_size = 1 << 29,
   literal_context_bits = 3,
+  literal_pos_state_bits = 0,				// not used
   pos_state_bits = 2,
   pos_states = 1 << pos_state_bits,
   pos_state_mask = pos_states - 1,
@@ -238,6 +239,7 @@ class LZ_decoder
   unsigned pos;			// current pos in buffer
   unsigned stream_pos;		// first byte not yet written to stdout
   uint32_t crc_;
+  bool pos_wrapped;
 
   void flush_data();
 
@@ -262,7 +264,8 @@ public:
     buffer( new uint8_t[dictionary_size] ),
     pos( 0 ),
     stream_pos( 0 ),
-    crc_( 0xFFFFFFFFU )
+    crc_( 0xFFFFFFFFU ),
+    pos_wrapped( false )
     { buffer[dictionary_size-1] = 0; }		// prev_byte of first byte
 
   ~LZ_decoder() { delete[] buffer; }
@@ -284,7 +287,8 @@ void LZ_decoder::flush_data()
     if( std::fwrite( buffer + stream_pos, 1, size, stdout ) != size )
       { std::fprintf( stderr, "Write error: %s\n", std::strerror( errno ) );
         std::exit( 1 ); }
-    if( pos >= dictionary_size ) { partial_data_pos += pos; pos = 0; }
+    if( pos >= dictionary_size )
+      { partial_data_pos += pos; pos = 0; pos_wrapped = true; }
     stream_pos = pos;
     }
   }
@@ -380,7 +384,7 @@ bool LZ_decoder::decode_member()		// Returns false if error
             }
           }
         state.set_match();
-        if( rep0 >= dictionary_size || rep0 >= data_position() )
+        if( rep0 >= dictionary_size || ( rep0 >= pos && !pos_wrapped ) )
           { flush_data(); return false; }
         }
       for( int i = 0; i < len; ++i ) put_byte( peek( rep0 ) );
@@ -402,7 +406,7 @@ int main( const int argc, const char * const argv[] )
                  "It is not safe to use lzd for any real work.\n"
                  "\nUsage: %s < file.lz > file\n", argv[0] );
     std::printf( "Lzd decompresses from standard input to standard output.\n"
-                 "\nCopyright (C) 2015 Antonio Diaz Diaz.\n"
+                 "\nCopyright (C) 2016 Antonio Diaz Diaz.\n"
                  "This is free software: you are free to change and redistribute it.\n"
                  "There is NO WARRANTY, to the extent permitted by law.\n"
                  "Report bugs to lzip-bug@nongnu.org\n"