Merging upstream version 1.14~rc2.

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

11 files changed, 141 insertions, 127 deletions

diff --git a/ChangeLog b/ChangeLog
index 91fa7c9..270acbb 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2013-03-25  Antonio Diaz Diaz  <ant_diaz@teleline.es>
+
+	* Version 1.14-rc2 released.
+	* Minor fixes.
+	* main.cc (show_header): Show header version if verbosity >= 4.
+
 2013-02-27  Antonio Diaz Diaz  <ant_diaz@teleline.es>
 
 	* Version 1.14-rc1 released.
diff --git a/NEWS b/NEWS
index 73ab113..834c42e 100644
--- a/NEWS
+++ b/NEWS
@@ -4,6 +4,8 @@ Option "-l, --list" now accepts more than one file.
 
 Decompression time has been reduced by 12%.
 
+File version is now shown only if verbosity >= 4.
+
 The target "install-as-lzip" has been added to the Makefile.
 
 The target "install-bin" has been added to the Makefile.
diff --git a/configure b/configure
index d869772..3628f48 100755
--- a/configure
+++ b/configure
@@ -8,7 +8,7 @@
 args=
 no_create=
 pkgname=lziprecover
-pkgversion=1.14-rc1
+pkgversion=1.14-rc2
 progname=lziprecover
 srctrigger=doc/lziprecover.texinfo
 
diff --git a/decoder.cc b/decoder.cc
index 5e26504..a8f7886 100644
--- a/decoder.cc
+++ b/decoder.cc
@@ -128,10 +128,10 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
   File_trailer trailer;
   const int trailer_size = File_trailer::size( member_version );
   const unsigned long long member_size =
-    range_decoder.member_position() + trailer_size;
+    rdec.member_position() + trailer_size;
   bool error = false;
 
-  int size = range_decoder.read_data( trailer.data, trailer_size );
+  int size = rdec.read_data( trailer.data, trailer_size );
   if( size < trailer_size )
     {
     error = true;
@@ -146,7 +146,7 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
 
   if( member_version == 0 ) trailer.member_size( member_size );
 
-  if( !range_decoder.code_is_zero() )
+  if( !rdec.code_is_zero() )
     {
     error = true;
     pp( "Range decoder final code is not zero" );
@@ -207,82 +207,79 @@ int LZ_decoder::decode_member( const Pretty_print & pp )
   Bit_model bm_dis_slot[max_dis_states][1<<dis_slot_bits];
   Bit_model bm_dis[modeled_distances-end_dis_model];
   Bit_model bm_align[dis_align_size];
-  Len_decoder len_decoder;
-  Len_decoder rep_match_len_decoder;
+  Len_model match_len_model;
+  Len_model rep_len_model;
 
   unsigned rep0 = 0;		// rep[0-3] latest four distances
   unsigned rep1 = 0;		// used for efficient coding of
   unsigned rep2 = 0;		// repeated distances
   unsigned rep3 = 0;
-
   State state;
-  range_decoder.load();
 
-  while( !range_decoder.finished() )
+  rdec.load();
+  while( !rdec.finished() )
     {
     const int pos_state = data_position() & pos_state_mask;
-    if( range_decoder.decode_bit( bm_match[state()][pos_state] ) == 0 )
+    if( rdec.decode_bit( bm_match[state()][pos_state] ) == 0 )
       {
       const uint8_t prev_byte = get_prev_byte();
       if( state.is_char() )
-        put_byte( range_decoder.decode_tree( bm_literal[get_lit_state(prev_byte)], 8 ) );
+        put_byte( rdec.decode_tree( bm_literal[get_lit_state(prev_byte)], 8 ) );
       else
-        put_byte( range_decoder.decode_matched( bm_literal[get_lit_state(prev_byte)],
-                                                get_byte( rep0 ) ) );
+        put_byte( rdec.decode_matched( bm_literal[get_lit_state(prev_byte)],
+                                       get_byte( rep0 ) ) );
       state.set_char();
       }
     else
       {
       int len;
-      if( range_decoder.decode_bit( bm_rep[state()] ) == 1 )
+      if( rdec.decode_bit( bm_rep[state()] ) == 1 )
         {
-        len = 0;
-        if( range_decoder.decode_bit( bm_rep0[state()] ) == 1 )
+        if( rdec.decode_bit( bm_rep0[state()] ) == 0 )
+          {
+          if( rdec.decode_bit( bm_len[state()][pos_state] ) == 0 )
+            { state.set_short_rep(); put_byte( get_byte( rep0 ) ); continue; }
+          }
+        else
           {
           unsigned distance;
-          if( range_decoder.decode_bit( bm_rep1[state()] ) == 0 )
+          if( rdec.decode_bit( bm_rep1[state()] ) == 0 )
             distance = rep1;
           else
             {
-            if( range_decoder.decode_bit( bm_rep2[state()] ) == 0 )
+            if( rdec.decode_bit( bm_rep2[state()] ) == 0 )
               distance = rep2;
-            else { distance = rep3; rep3 = rep2; }
+            else
+              { distance = rep3; rep3 = rep2; }
             rep2 = rep1;
             }
           rep1 = rep0;
           rep0 = distance;
           }
-        else
-          {
-          if( range_decoder.decode_bit( bm_len[state()][pos_state] ) == 0 )
-            { state.set_short_rep(); len = 1; }
-          }
-        if( len == 0 )
-          {
-          state.set_rep();
-          len = min_match_len + rep_match_len_decoder.decode( range_decoder, pos_state );
-          }
+        len = min_match_len + rdec.decode_len( rep_len_model, pos_state );
+        state.set_rep();
         }
       else
         {
         const unsigned rep0_saved = rep0;
-        len = min_match_len + len_decoder.decode( range_decoder, pos_state );
-        const int dis_slot = range_decoder.decode_tree6( bm_dis_slot[get_dis_state(len)] );
+        len = min_match_len + rdec.decode_len( match_len_model, pos_state );
+        const int dis_slot = rdec.decode_tree6( bm_dis_slot[get_dis_state(len)] );
         if( dis_slot < start_dis_model ) rep0 = dis_slot;
         else
           {
           const int direct_bits = ( dis_slot >> 1 ) - 1;
           rep0 = ( 2 | ( dis_slot & 1 ) ) << direct_bits;
           if( dis_slot < end_dis_model )
-            rep0 += range_decoder.decode_tree_reversed( bm_dis + rep0 - dis_slot - 1, direct_bits );
+            rep0 += rdec.decode_tree_reversed( bm_dis + rep0 - dis_slot - 1,
+                                               direct_bits );
           else
             {
-            rep0 += range_decoder.decode( direct_bits - dis_align_bits ) << dis_align_bits;
-            rep0 += range_decoder.decode_tree_reversed4( bm_align );
+            rep0 += rdec.decode( direct_bits - dis_align_bits ) << dis_align_bits;
+            rep0 += rdec.decode_tree_reversed4( bm_align );
             if( rep0 == 0xFFFFFFFFU )		// Marker found
               {
               rep0 = rep0_saved;
-              range_decoder.normalize();
+              rdec.normalize();
               flush_data();
               if( len == min_match_len )	// End Of Stream marker
                 {
@@ -290,7 +287,7 @@ int LZ_decoder::decode_member( const Pretty_print & pp )
                 }
               if( len == min_match_len + 1 )	// Sync Flush marker
                 {
-                range_decoder.load(); continue;
+                rdec.load(); continue;
                 }
               if( pp.verbosity() >= 0 )
                 {
diff --git a/decoder.h b/decoder.h
index c446802..a153bcb 100644
--- a/decoder.h
+++ b/decoder.h
@@ -122,22 +122,22 @@ public:
 
   int decode_tree( Bit_model bm[], const int num_bits )
     {
-    int model = 1;
+    int symbol = 1;
     for( int i = num_bits; i > 0; --i )
-      model = ( model << 1 ) | decode_bit( bm[model] );
-    return model - (1 << num_bits);
+      symbol = ( symbol << 1 ) | decode_bit( bm[symbol] );
+    return symbol - (1 << num_bits);
     }
 
   int decode_tree6( Bit_model bm[] )
     {
-    int model = 1;
-    model = ( model << 1 ) | decode_bit( bm[model] );
-    model = ( model << 1 ) | decode_bit( bm[model] );
-    model = ( model << 1 ) | decode_bit( bm[model] );
-    model = ( model << 1 ) | decode_bit( bm[model] );
-    model = ( model << 1 ) | decode_bit( bm[model] );
-    model = ( model << 1 ) | decode_bit( bm[model] );
-    return model - (1 << 6);
+    int symbol = 1;
+    symbol = ( symbol << 1 ) | decode_bit( bm[symbol] );
+    symbol = ( symbol << 1 ) | decode_bit( bm[symbol] );
+    symbol = ( symbol << 1 ) | decode_bit( bm[symbol] );
+    symbol = ( symbol << 1 ) | decode_bit( bm[symbol] );
+    symbol = ( symbol << 1 ) | decode_bit( bm[symbol] );
+    symbol = ( symbol << 1 ) | decode_bit( bm[symbol] );
+    return symbol - (1 << 6);
     }
 
   int decode_tree_reversed( Bit_model bm[], const int num_bits )
@@ -186,27 +186,16 @@ public:
       }
     return symbol - 0x100;
     }
-  };
 
-
-class Len_decoder
-  {
-  Bit_model choice1;
-  Bit_model choice2;
-  Bit_model bm_low[pos_states][len_low_symbols];
-  Bit_model bm_mid[pos_states][len_mid_symbols];
-  Bit_model bm_high[len_high_symbols];
-
-public:
-  int decode( Range_decoder & range_decoder, const int pos_state )
+  int decode_len( Len_model & lm, const int pos_state )
     {
-    if( range_decoder.decode_bit( choice1 ) == 0 )
-      return range_decoder.decode_tree( bm_low[pos_state], len_low_bits );
-    if( range_decoder.decode_bit( choice2 ) == 0 )
+    if( decode_bit( lm.choice1 ) == 0 )
+      return decode_tree( lm.bm_low[pos_state], len_low_bits );
+    if( decode_bit( lm.choice2 ) == 0 )
       return len_low_symbols +
-             range_decoder.decode_tree( bm_mid[pos_state], len_mid_bits );
+             decode_tree( lm.bm_mid[pos_state], len_mid_bits );
     return len_low_symbols + len_mid_symbols +
-           range_decoder.decode_tree( bm_high, len_high_bits );
+           decode_tree( lm.bm_high, len_high_bits );
     }
   };
 
@@ -216,7 +205,7 @@ class LZ_decoder
   const unsigned long long outskip;
   const unsigned long long outend;
   unsigned long long partial_data_pos;
-  Range_decoder & range_decoder;
+  Range_decoder & rdec;
   const int dictionary_size;
   const int buffer_size;
   uint8_t * const buffer;	// output buffer
@@ -270,14 +259,14 @@ class LZ_decoder
   void operator=( const LZ_decoder & );		// declared as private
 
 public:
-  LZ_decoder( const File_header & header, Range_decoder & rdec, const int ofd,
+  LZ_decoder( const File_header & header, Range_decoder & rde, const int ofd,
               const unsigned long long oskip = 0,
               const unsigned long long oend = -1ULL )
     :
     outskip( oskip ),
     outend( oend ),
     partial_data_pos( 0 ),
-    range_decoder( rdec ),
+    rdec( rde ),
     dictionary_size( header.dictionary_size() ),
     buffer_size( std::max( 65536, dictionary_size ) ),
     buffer( new uint8_t[buffer_size] ),
diff --git a/doc/lziprecover.1 b/doc/lziprecover.1
index d63f6ab..6470174 100644
--- a/doc/lziprecover.1
+++ b/doc/lziprecover.1
@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.37.1.
-.TH LZIPRECOVER "1" "February 2013" "Lziprecover 1.14-rc1" "User Commands"
+.TH LZIPRECOVER "1" "March 2013" "Lziprecover 1.14-rc2" "User Commands"
 .SH NAME
 Lziprecover \- recovers data from damaged lzip files
 .SH SYNOPSIS
diff --git a/doc/lziprecover.info b/doc/lziprecover.info
index 7b24dcb..dd9a65e 100644
--- a/doc/lziprecover.info
+++ b/doc/lziprecover.info
@@ -12,7 +12,7 @@ File: lziprecover.info,  Node: Top,  Next: Introduction,  Up: (dir)
 Lziprecover Manual
 ******************
 
-This manual is for Lziprecover (version 1.14-rc1, 27 February 2013).
+This manual is for Lziprecover (version 1.14-rc2, 25 March 2013).
 
 * Menu:
 
@@ -268,6 +268,7 @@ additional information before, between, or after them.
      Bits 4-0 contain the base 2 logarithm of the base size (12 to 29).
      Bits 7-5 contain the number of wedges (0 to 7) to substract from
      the base size to obtain the dictionary size.
+     Example: 0xD3 = (2^19 - 6 * 2^15) = (512KiB - 6 * 32KiB) = 320KiB
      Valid values for dictionary size range from 4KiB to 512MiB.
 
 `Lzma stream'
@@ -282,8 +283,9 @@ additional information before, between, or after them.
 
 `Member size (8 bytes)'
      Total size of the member, including header and trailer. This field
-     acts as a distributed index, and facilitates safe recovery of
-     undamaged members from multi-member files.
+     acts as a distributed index, allows the verification of stream
+     integrity, and facilitates safe recovery of undamaged members from
+     multi-member files.
 
 
 
@@ -408,13 +410,13 @@ Concept Index
 
 Tag Table:
 Node: Top231
-Node: Introduction910
-Node: Invoking Lziprecover2947
-Node: File Format8073
-Node: Examples10394
-Ref: ddrescue-example11612
-Node: Problems13443
-Node: Concept Index13993
+Node: Introduction907
+Node: Invoking Lziprecover2944
+Node: File Format8070
+Node: Examples10512
+Ref: ddrescue-example11730
+Node: Problems13561
+Node: Concept Index14111
 
 End Tag Table
 
diff --git a/doc/lziprecover.texinfo b/doc/lziprecover.texinfo
index 872abb4..676e8d6 100644
--- a/doc/lziprecover.texinfo
+++ b/doc/lziprecover.texinfo
@@ -6,8 +6,8 @@
 @finalout
 @c %**end of header
 
-@set UPDATED 27 February 2013
-@set VERSION 1.14-rc1
+@set UPDATED 25 March 2013
+@set VERSION 1.14-rc2
 
 @dircategory Data Compression
 @direntry
@@ -297,6 +297,7 @@ wedges between 0 and 7. The size of a wedge is (base_size / 16).@*
 Bits 4-0 contain the base 2 logarithm of the base size (12 to 29).@*
 Bits 7-5 contain the number of wedges (0 to 7) to substract from the
 base size to obtain the dictionary size.@*
+Example: 0xD3 = (2^19 - 6 * 2^15) = (512KiB - 6 * 32KiB) = 320KiB@*
 Valid values for dictionary size range from 4KiB to 512MiB.
 
 @item Lzma stream
@@ -311,8 +312,8 @@ Size of the uncompressed original data.
 
 @item Member size (8 bytes)
 Total size of the member, including header and trailer. This field acts
-as a distributed index, and facilitates safe recovery of undamaged
-members from multi-member files.
+as a distributed index, allows the verification of stream integrity, and
+facilitates safe recovery of undamaged members from multi-member files.
 
 @end table
 
diff --git a/lzip.h b/lzip.h
index ac3c002..5486646 100644
--- a/lzip.h
+++ b/lzip.h
@@ -86,6 +86,15 @@ struct Bit_model
   Bit_model() : probability( bit_model_total / 2 ) {}
   };
 
+struct Len_model
+  {
+  Bit_model choice1;
+  Bit_model choice2;
+  Bit_model bm_low[pos_states][len_low_symbols];
+  Bit_model bm_mid[pos_states][len_mid_symbols];
+  Bit_model bm_high[len_high_symbols];
+  };
+
 
 class Pretty_print
   {
diff --git a/main.cc b/main.cc
index 0b7a88a..df55c79 100644
--- a/main.cc
+++ b/main.cc
@@ -145,8 +145,9 @@ void show_header( const File_header & header )
   for( int i = 0; i < 8 && ( num > 9999 || ( exact && num >= factor ) ); ++i )
     { num /= factor; if( num % factor != 0 ) exact = false;
       p = prefix[i]; np = ""; }
-  std::fprintf( stderr, "version %d, dictionary size %s%4u %sB.  ",
-                header.version(), np, num, p );
+  if( verbosity >= 4 )
+    std::fprintf( stderr, "version %d, ", header.version() );
+  std::fprintf( stderr, "dictionary size %s%4u %sB.  ", np, num, p );
   }
 
 namespace {
@@ -359,7 +360,6 @@ void show_trailing_garbage( const uint8_t * const data, const int size,
 
 int decompress( const int infd, const Pretty_print & pp, const bool testing )
   {
-  const char * const ok_msg = ( testing ? "ok\n" : "done\n" );
   int retval = 0;
 
   try {
@@ -418,7 +418,8 @@ int decompress( const int infd, const Pretty_print & pp, const bool testing )
           }
         retval = 2; break;
         }
-      if( verbosity >= 2 ) { std::fprintf( stderr, ok_msg ); pp.reset(); }
+      if( verbosity >= 2 )
+        { std::fprintf( stderr, testing ? "ok\n" : "done\n" ); pp.reset(); }
       }
     }
   catch( std::bad_alloc )
@@ -427,7 +428,8 @@ int decompress( const int infd, const Pretty_print & pp, const bool testing )
     retval = 1;
     }
   catch( Error e ) { pp(); show_error( e.msg, errno ); retval = 1; }
-  if( verbosity == 1 && retval == 0 ) std::fprintf( stderr, ok_msg );
+  if( verbosity == 1 && retval == 0 )
+    std::fprintf( stderr, testing ? "ok\n" : "done\n" );
   return retval;
   }
 
diff --git a/testsuite/check.sh b/testsuite/check.sh
index bd77f02..f208067 100755
--- a/testsuite/check.sh
+++ b/testsuite/check.sh
@@ -41,92 +41,98 @@ fail=0
 
 printf "testing lziprecover-%s..." "$2"
 
+"${LZIPRECOVER}" -lq
+if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
+"${LZIPRECOVER}" -mq "${bad1_lz}"
+if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
+"${LZIPRECOVER}" -Rq
+if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
+"${LZIPRECOVER}" -sq
+if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
+
 "${LZIP}" -t "${testdir}"/test_v0.lz || fail=1
 printf .
 "${LZIP}" -cd "${testdir}"/test_v0.lz > copy || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
 
 "${LZIP}" -t "${testdir}"/test_v1.lz || fail=1
 printf .
 "${LZIP}" -cd "${testdir}"/test_v1.lz > copy || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
 
-"${LZIPRECOVER}" -lq
-if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
-"${LZIPRECOVER}" -mq ${bad1_lz}
-if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
-"${LZIPRECOVER}" -Rq
-if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
-"${LZIPRECOVER}" -sq
-if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
-
-"${LZIPRECOVER}" -D 921-1921 -fo copy ${in_lz} || fail=1
-cmp ${inD} copy || fail=1
+"${LZIPRECOVER}" -D 921-1921 -fo copy "${in_lz}" || fail=1
+cmp "${inD}" copy || fail=1
 printf .
-"${LZIPRECOVER}" -D 921,1000 ${in_lz} > copy || fail=1
-cmp ${inD} copy || fail=1
+"${LZIPRECOVER}" -D 921,1000 "${in_lz}" > copy || fail=1
+cmp "${inD}" copy || fail=1
 printf .
 
-"${LZIPRECOVER}" -m -o copy.lz ${bad1_lz} ${bad2_lz} ${bad1_lz} -q
+"${LZIPRECOVER}" -m -o copy.lz "${bad1_lz}" "${bad2_lz}" "${bad1_lz}" -q
 if [ $? != 1 ] ; then fail=1 ; printf - ; else printf . ; fi
-"${LZIPRECOVER}" -m -o copy.lz ${bad1_lz} ${bad2_lz} || fail=1
+"${LZIPRECOVER}" -m -o copy.lz "${bad1_lz}" "${bad2_lz}" || fail=1
 "${LZIPRECOVER}" -df copy.lz || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
-"${LZIPRECOVER}" -m -o copy.lz ${bad2_lz} ${bad1_lz} || fail=1
+"${LZIPRECOVER}" -m -o copy.lz "${bad2_lz}" "${bad1_lz}" || fail=1
 "${LZIPRECOVER}" -df copy.lz || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
 
-for i in ${bad1_lz} ${bad2_lz} ; do
-	for j in ${bad3_lz} ${bad4_lz} ${bad5_lz} ; do
-		"${LZIPRECOVER}" -m -o copy.lz ${i} ${j} || fail=1
+for i in "${bad1_lz}" "${bad2_lz}" ; do
+	for j in "${bad3_lz}" "${bad4_lz}" "${bad5_lz}" ; do
+		"${LZIPRECOVER}" -m -o copy.lz "${i}" "${j}" || fail=1
 		"${LZIPRECOVER}" -df copy.lz || fail=1
-		cmp ${in} copy || fail=1
+		cmp "${in}" copy || fail=1
 		printf .
-		"${LZIPRECOVER}" -m -o copy.lz ${j} ${i} || fail=1
+		"${LZIPRECOVER}" -m -o copy.lz "${j}" "${i}" || fail=1
 		"${LZIPRECOVER}" -df copy.lz || fail=1
-		cmp ${in} copy || fail=1
+		cmp "${in}" copy || fail=1
 		printf .
 	done
 done
 
-"${LZIPRECOVER}" -m -o copy.lz ${bad3_lz} ${bad4_lz} ${bad5_lz} || fail=1
+"${LZIPRECOVER}" -m -o copy.lz "${bad3_lz}" "${bad4_lz}" "${bad5_lz}" || fail=1
 "${LZIPRECOVER}" -df copy.lz || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
-"${LZIPRECOVER}" -m -o copy.lz ${bad4_lz} ${bad5_lz} ${bad3_lz} || fail=1
+"${LZIPRECOVER}" -m -o copy.lz "${bad4_lz}" "${bad5_lz}" "${bad3_lz}" || fail=1
 "${LZIPRECOVER}" -df copy.lz || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
-"${LZIPRECOVER}" -m -o copy.lz ${bad5_lz} ${bad3_lz} ${bad4_lz} || fail=1
+"${LZIPRECOVER}" -m -o copy.lz "${bad5_lz}" "${bad3_lz}" "${bad4_lz}" || fail=1
 "${LZIPRECOVER}" -df copy.lz || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
 
-"${LZIPRECOVER}" -R ${in_lz} || fail=1
+"${LZIPRECOVER}" -R "${in_lz}" || fail=1
 printf .
-"${LZIPRECOVER}" -R -o copy.lz ${bad2_lz} -q
+"${LZIPRECOVER}" -R -o copy.lz "${bad2_lz}" -q
 if [ $? != 2 ] ; then fail=1 ; printf - ; else printf . ; fi
-"${LZIPRECOVER}" -R -o copy.lz ${bad1_lz} || fail=1
+"${LZIPRECOVER}" -R -o copy.lz "${bad1_lz}" || fail=1
 "${LZIPRECOVER}" -df copy.lz || fail=1
-cmp ${in} copy || fail=1
+cmp "${in}" copy || fail=1
 printf .
 
-cat ${in_lz} ${in_lz} ${in_lz} > copy || framework_failure
+cat "${in_lz}" "${in_lz}" "${in_lz}" > copy || framework_failure
 printf "garbage" >> copy || fail=1
 "${LZIPRECOVER}" -s -o copy.lz copy || fail=1
 for i in 1 2 3 ; do
 	"${LZIPRECOVER}" -cd rec0000${i}copy.lz > copy || fail=1
-	cmp ${in} copy || fail=1
+	cmp "${in}" copy || fail=1
 	printf .
 done
 
-cat ${in_lz} > anyothername || framework_failure
+cat "${in_lz}" > anyothername || framework_failure
 "${LZIP}" -d anyothername || fail=1
-cmp ${in} anyothername.out || fail=1
+cmp "${in}" anyothername.out || fail=1
+printf .
+
+cat "${in}" "${in}" > in2 || framework_failure
+cat "${in_lz}" "${in_lz}" > out2 || framework_failure
+"${LZIP}" -d < out2 > copy2 || fail=1
+cmp in2 copy2 || fail=1
 printf .
 
 echo