From 8ea0538d70bde5c4759fce0f5bda0684517d6d92 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <mail@daniel-baumann.ch>
Date: Sat, 7 Nov 2015 11:21:04 +0100
Subject: Merging upstream version 1.14~rc1.

Signed-off-by: Daniel Baumann <mail@daniel-baumann.ch>
---
 decoder.cc | 90 ++++++++++++++++++++++++++++++++------------------------------
 1 file changed, 47 insertions(+), 43 deletions(-)

(limited to 'decoder.cc')

diff --git a/decoder.cc b/decoder.cc
index fdb4ff9..5e26504 100644
--- a/decoder.cc
+++ b/decoder.cc
@@ -1,5 +1,5 @@
 /*  Lziprecover - Data recovery tool for lzipped files
-    Copyright (C) 2009, 2010, 2011, 2012 Antonio Diaz Diaz.
+    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
@@ -34,19 +34,19 @@
 const CRC32 crc32;
 
 
-void Pretty_print::operator()( const char * const msg ) const
+void Pretty_print::operator()( const char * const msg, FILE * const f ) const
   {
   if( verbosity_ >= 0 )
     {
     if( first_post )
       {
       first_post = false;
-      std::fprintf( stderr, "  %s: ", name_.c_str() );
-      for( unsigned int i = 0; i < longest_name - name_.size(); ++i )
-        std::fprintf( stderr, " " );
-      if( !msg ) std::fflush( stderr );
+      std::fprintf( f, "  %s: ", name_.c_str() );
+      for( unsigned i = 0; i < longest_name - name_.size(); ++i )
+        std::fprintf( f, " " );
+      if( !msg ) std::fflush( f );
       }
-    if( msg ) std::fprintf( stderr, "%s.\n", msg );
+    if( msg ) std::fprintf( f, "%s.\n", msg );
     }
   }
 
@@ -60,13 +60,13 @@ int readblock( const int fd, uint8_t * const buf, const int size )
   errno = 0;
   while( rest > 0 )
     {
-    errno = 0;
     const int n = read( fd, buf + size - rest, rest );
     if( n > 0 ) rest -= n;
-    else if( n == 0 ) break;
+    else if( n == 0 ) break;				// EOF
     else if( errno != EINTR && errno != EAGAIN ) break;
+    errno = 0;
     }
-  return ( rest > 0 ) ? size - rest : size;
+  return size - rest;
   }
 
 
@@ -79,12 +79,12 @@ int writeblock( const int fd, const uint8_t * const buf, const int size )
   errno = 0;
   while( rest > 0 )
     {
-    errno = 0;
     const int n = write( fd, buf + size - rest, rest );
     if( n > 0 ) rest -= n;
     else if( n < 0 && errno != EINTR && errno != EAGAIN ) break;
+    errno = 0;
     }
-  return ( rest > 0 ) ? size - rest : size;
+  return size - rest;
   }
 
 
@@ -110,9 +110,10 @@ void LZ_decoder::flush_data()
     crc32.update( crc_, buffer + stream_pos, size );
     if( outfd >= 0 )
       {
-      const long long i = std::max( 0LL, outskip - stream_position() );
+      const unsigned long long sp = stream_position();
+      const long long i = positive_diff( outskip, sp );
       const long long s =
-        std::min( outend - stream_position(), (long long)size ) - i;
+        std::min( positive_diff( outend, sp ), (unsigned long long)size ) - i;
       if( s > 0 && writeblock( outfd, buffer + stream_pos + i, s ) != s )
         throw Error( "Write error" );
       }
@@ -126,10 +127,11 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
   {
   File_trailer trailer;
   const int trailer_size = File_trailer::size( member_version );
-  const long long member_size = range_decoder.member_position() + trailer_size;
+  const unsigned long long member_size =
+    range_decoder.member_position() + trailer_size;
   bool error = false;
 
-  const int size = range_decoder.read( trailer.data, trailer_size );
+  int size = range_decoder.read_data( trailer.data, trailer_size );
   if( size < trailer_size )
     {
     error = true;
@@ -139,9 +141,11 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
       std::fprintf( stderr, "Trailer truncated at trailer position %d;"
                             " some checks may fail.\n", size );
       }
-    for( int i = size; i < trailer_size; ++i ) trailer.data[i] = 0;
+    while( size < trailer_size ) trailer.data[size++] = 0;
     }
+
   if( member_version == 0 ) trailer.member_size( member_size );
+
   if( !range_decoder.code_is_zero() )
     {
     error = true;
@@ -154,7 +158,7 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
       {
       pp();
       std::fprintf( stderr, "CRC mismatch; trailer says %08X, data CRC is %08X.\n",
-                    (unsigned int)trailer.data_crc(), (unsigned int)crc() );
+                    trailer.data_crc(), crc() );
       }
     }
   if( trailer.data_size() != data_position() )
@@ -163,7 +167,7 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
     if( pp.verbosity() >= 0 )
       {
       pp();
-      std::fprintf( stderr, "Data size mismatch; trailer says %lld, data size is %lld (0x%llX).\n",
+      std::fprintf( stderr, "Data size mismatch; trailer says %llu, data size is %llu (0x%llX).\n",
                     trailer.data_size(), data_position(), data_position() );
       }
     }
@@ -173,7 +177,7 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
     if( pp.verbosity() >= 0 )
       {
       pp();
-      std::fprintf( stderr, "Member size mismatch; trailer says %lld, member size is %lld (0x%llX).\n",
+      std::fprintf( stderr, "Member size mismatch; trailer says %llu, member size is %llu (0x%llX).\n",
                     trailer.member_size(), member_size, member_size );
       }
     }
@@ -183,9 +187,8 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
                   ( 8.0 * member_size ) / data_position(),
                   100.0 * ( 1.0 - ( (double)member_size / data_position() ) ) );
   if( !error && pp.verbosity() >= 4 )
-    std::fprintf( stderr, "data CRC %08X, data size %9lld, member size %8lld.  ",
-                  (unsigned int)trailer.data_crc(), trailer.data_size(),
-                  trailer.member_size() );
+    std::fprintf( stderr, "data CRC %08X, data size %9llu, member size %8llu.  ",
+                  trailer.data_crc(), trailer.data_size(), trailer.member_size() );
   return !error;
   }
 
@@ -194,6 +197,7 @@ bool LZ_decoder::verify_trailer( const Pretty_print & pp ) const
 //               3 = trailer error, 4 = unknown marker found.
 int LZ_decoder::decode_member( const Pretty_print & pp )
   {
+  Bit_model bm_literal[1<<literal_context_bits][0x300];
   Bit_model bm_match[State::states][pos_states];
   Bit_model bm_rep[State::states];
   Bit_model bm_rep0[State::states];
@@ -201,32 +205,30 @@ int LZ_decoder::decode_member( const Pretty_print & pp )
   Bit_model bm_rep2[State::states];
   Bit_model bm_len[State::states][pos_states];
   Bit_model bm_dis_slot[max_dis_states][1<<dis_slot_bits];
-  Bit_model bm_dis[modeled_distances-end_dis_model+1];
+  Bit_model bm_dis[modeled_distances-end_dis_model];
   Bit_model bm_align[dis_align_size];
-
-  unsigned int rep0 = 0;	// rep[0-3] latest four distances
-  unsigned int rep1 = 0;	// used for efficient coding of
-  unsigned int rep2 = 0;	// repeated distances
-  unsigned int rep3 = 0;
-
   Len_decoder len_decoder;
   Len_decoder rep_match_len_decoder;
-  Literal_decoder literal_decoder;
+
+  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( true )
+  while( !range_decoder.finished() )
     {
-    if( range_decoder.finished() ) { flush_data(); return 2; }
     const int pos_state = data_position() & pos_state_mask;
     if( range_decoder.decode_bit( bm_match[state()][pos_state] ) == 0 )
       {
       const uint8_t prev_byte = get_prev_byte();
       if( state.is_char() )
-        put_byte( literal_decoder.decode( range_decoder, prev_byte ) );
+        put_byte( range_decoder.decode_tree( bm_literal[get_lit_state(prev_byte)], 8 ) );
       else
-        put_byte( literal_decoder.decode_matched( range_decoder, prev_byte,
-                                                  get_byte( rep0 ) ) );
+        put_byte( range_decoder.decode_matched( bm_literal[get_lit_state(prev_byte)],
+                                                get_byte( rep0 ) ) );
       state.set_char();
       }
     else
@@ -237,7 +239,7 @@ int LZ_decoder::decode_member( const Pretty_print & pp )
         len = 0;
         if( range_decoder.decode_bit( bm_rep0[state()] ) == 1 )
           {
-          unsigned int distance;
+          unsigned distance;
           if( range_decoder.decode_bit( bm_rep1[state()] ) == 0 )
             distance = rep1;
           else
@@ -263,20 +265,20 @@ int LZ_decoder::decode_member( const Pretty_print & pp )
         }
       else
         {
-        const unsigned int rep0_saved = rep0;
+        const unsigned rep0_saved = rep0;
         len = min_match_len + len_decoder.decode( range_decoder, pos_state );
-        const int dis_slot = range_decoder.decode_tree( bm_dis_slot[get_dis_state(len)], dis_slot_bits );
+        const int dis_slot = range_decoder.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, direct_bits );
+            rep0 += range_decoder.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_reversed( bm_align, dis_align_bits );
+            rep0 += range_decoder.decode_tree_reversed4( bm_align );
             if( rep0 == 0xFFFFFFFFU )		// Marker found
               {
               rep0 = rep0_saved;
@@ -301,11 +303,13 @@ int LZ_decoder::decode_member( const Pretty_print & pp )
           }
         rep3 = rep2; rep2 = rep1; rep1 = rep0_saved;
         state.set_match();
-        if( rep0 >= (unsigned int)dictionary_size ||
-            ( rep0 >= (unsigned int)pos && !partial_data_pos ) )
+        if( rep0 >= (unsigned)dictionary_size ||
+            ( rep0 >= (unsigned)pos && !partial_data_pos ) )
           { flush_data(); return 1; }
         }
       copy_block( rep0, len );
       }
     }
+  flush_data();
+  return 2;
   }
-- 
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