Adding upstream version 1.3.upstream/1.3

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

1 files changed, 0 insertions, 663 deletions

diff --git a/encoder.cc b/encoder.cc
deleted file mode 100644
index fb7e65e..0000000
--- a/encoder.cc
+++ /dev/null
@@ -1,663 +0,0 @@
-/*  Lzlib - A compression library for lzip files
-    Copyright (C) 2009, 2010, 2011 Antonio Diaz Diaz.
-
-    This library 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 3 of the License, or
-    (at your option) any later version.
-
-    This library 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 library.  If not, see <http://www.gnu.org/licenses/>.
-
-    As a special exception, you may use this file as part of a free
-    software library without restriction.  Specifically, if other files
-    instantiate templates or use macros or inline functions from this
-    file, or you compile this file and link it with other files to
-    produce an executable, this file does not by itself cause the
-    resulting executable to be covered by the GNU General Public
-    License.  This exception does not however invalidate any other
-    reasons why the executable file might be covered by the GNU General
-    Public License.
-*/
-
-#define _FILE_OFFSET_BITS 64
-
-#include <algorithm>
-#include <cerrno>
-#include <cstdlib>
-#include <cstring>
-#include <stdint.h>
-
-#include "lzlib.h"
-#include "lzip.h"
-#include "encoder.h"
-
-
-namespace Lzlib {
-
-const Dis_slots dis_slots;
-const Prob_prices prob_prices;
-
-
-int Matchfinder::write_data( const uint8_t * const in_buffer, const int in_size ) throw()
-  {
-  if( at_stream_end_ || in_size < 0 ) return 0;
-  const int size = std::min( buffer_size - stream_pos, in_size );
-  if( size > 0 )
-    {
-    std::memcpy( buffer + stream_pos, in_buffer, size );
-    stream_pos += size;
-    }
-  return size;
-  }
-
-
-Matchfinder::Matchfinder( const int dict_size, const int len_limit )
-  :
-  partial_data_pos( 0 ),
-  dictionary_size_( dict_size ),
-  buffer_size( ( 2 * std::max( 65536, dictionary_size_ ) ) +
-               before_size + after_size ),
-  buffer( new( std::nothrow ) uint8_t[buffer_size] ),
-  prev_positions( new( std::nothrow ) int32_t[num_prev_positions] ),
-  prev_pos_tree( new( std::nothrow ) int32_t[2*dictionary_size_] ),
-  pos( 0 ),
-  cyclic_pos( 0 ),
-  stream_pos( 0 ),
-  pos_limit( buffer_size - after_size ),
-  match_len_limit_( len_limit ),
-  cycles( ( len_limit < max_match_len ) ? 16 + ( len_limit / 2 ) : 256 ),
-  at_stream_end_( false ),
-  been_flushed( false )
-  {
-  if( !buffer || !prev_positions || !prev_pos_tree )
-    {
-    if( prev_pos_tree ) delete[] prev_pos_tree;
-    if( prev_positions ) delete[] prev_positions;
-    if( buffer ) delete[] buffer;
-    throw std::bad_alloc();
-    }
-  for( int i = 0; i < num_prev_positions; ++i ) prev_positions[i] = -1;
-  }
-
-
-void Matchfinder::reset() throw()
-  {
-  const int size = stream_pos - pos;
-  if( size > 0 ) std::memmove( buffer, buffer + pos, size );
-  partial_data_pos = 0;
-  stream_pos -= pos;
-  pos = 0;
-  cyclic_pos = 0;
-  at_stream_end_ = false;
-  been_flushed = false;
-  for( int i = 0; i < num_prev_positions; ++i ) prev_positions[i] = -1;
-  }
-
-
-bool Matchfinder::move_pos() throw()
-  {
-  if( ++cyclic_pos >= dictionary_size_ ) cyclic_pos = 0;
-  if( ++pos >= pos_limit )
-    {
-    if( pos > stream_pos )
-      { pos = stream_pos; return false; }
-    else
-      {
-      const int offset = pos - dictionary_size_ - before_size;
-      const int size = stream_pos - offset;
-      std::memmove( buffer, buffer + offset, size );
-      partial_data_pos += offset;
-      pos -= offset;
-      stream_pos -= offset;
-      for( int i = 0; i < num_prev_positions; ++i )
-        if( prev_positions[i] >= 0 ) prev_positions[i] -= offset;
-      for( int i = 0; i < 2 * dictionary_size_; ++i )
-        if( prev_pos_tree[i] >= 0 ) prev_pos_tree[i] -= offset;
-      }
-    }
-  return true;
-  }
-
-
-int Matchfinder::longest_match_len( int * const distances ) throw()
-  {
-  int32_t * ptr0 = prev_pos_tree + ( cyclic_pos << 1 );
-  int32_t * ptr1 = ptr0 + 1;
-  int len_limit = match_len_limit_;
-  if( len_limit > available_bytes() )
-    {
-    been_flushed = true;
-    len_limit = available_bytes();
-    if( len_limit < 4 ) { *ptr0 = *ptr1 = -1; return 0; }
-    }
-
-  int maxlen = min_match_len - 1;
-  const int min_pos = (pos >= dictionary_size_) ?
-                      (pos - dictionary_size_ + 1) : 0;
-  const uint8_t * const data = buffer + pos;
-  const int key2 = num_prev_positions4 + num_prev_positions3 +
-                   ( ( (int)data[0] << 8 ) | data[1] );
-  const uint32_t tmp = crc32[data[0]] ^ data[1] ^ ( (uint32_t)data[2] << 8 );
-  const int key3 = num_prev_positions4 +
-                   (int)( tmp & ( num_prev_positions3 - 1 ) );
-  const int key4 = (int)( ( tmp ^ ( crc32[data[3]] << 5 ) ) &
-                          ( num_prev_positions4 - 1 ) );
-
-  if( distances )
-    {
-    int np = prev_positions[key2];
-    if( np >= min_pos )
-      { distances[2] = pos - np - 1; maxlen = 2; }
-    else distances[2] = 0x7FFFFFFF;
-    np = prev_positions[key3];
-    if( np >= min_pos && buffer[np] == data[0] )
-      { distances[3] = pos - np - 1; maxlen = 3; }
-    else distances[3] = 0x7FFFFFFF;
-    distances[4] = 0x7FFFFFFF;
-    }
-
-  prev_positions[key2] = pos;
-  prev_positions[key3] = pos;
-  int newpos = prev_positions[key4];
-  prev_positions[key4] = pos;
-
-  int len = 0, len0 = 0, len1 = 0;
-
-  for( int count = cycles; ; )
-    {
-    if( newpos < min_pos || --count < 0 ) { *ptr0 = *ptr1 = -1; break; }
-    const uint8_t * const newdata = buffer + newpos;
-    if( been_flushed ) len = 0;
-    while( len < len_limit && newdata[len] == data[len] ) ++len;
-
-    const int delta = pos - newpos;
-    if( distances ) while( maxlen < len ) distances[++maxlen] = delta - 1;
-
-    int32_t * const newptr = prev_pos_tree +
-      ( ( cyclic_pos - delta +
-          ( ( cyclic_pos >= delta ) ? 0 : dictionary_size_ ) ) << 1 );
-
-    if( len < len_limit )
-      {
-      if( newdata[len] < data[len] )
-        {
-        *ptr0 = newpos;
-        ptr0 = newptr + 1;
-        newpos = *ptr0;
-        len0 = len; if( len1 < len ) len = len1;
-        }
-      else
-        {
-        *ptr1 = newpos;
-        ptr1 = newptr;
-        newpos = *ptr1;
-        len1 = len; if( len0 < len ) len = len0;
-        }
-      }
-    else
-      {
-      *ptr0 = newptr[0];
-      *ptr1 = newptr[1];
-      break;
-      }
-    }
-  if( distances )
-    {
-    if( distances[3] > distances[4] ) distances[3] = distances[4];
-    if( distances[2] > distances[3] ) distances[2] = distances[3];
-    }
-  return maxlen;
-  }
-
-
-void Len_encoder::encode( Range_encoder & range_encoder, int symbol,
-                          const int pos_state )
-  {
-  symbol -= min_match_len;
-  if( symbol < len_low_symbols )
-    {
-    range_encoder.encode_bit( choice1, 0 );
-    range_encoder.encode_tree( bm_low[pos_state], symbol, len_low_bits );
-    }
-  else
-    {
-    range_encoder.encode_bit( choice1, 1 );
-    if( symbol < len_low_symbols + len_mid_symbols )
-      {
-      range_encoder.encode_bit( choice2, 0 );
-      range_encoder.encode_tree( bm_mid[pos_state], symbol - len_low_symbols, len_mid_bits );
-      }
-    else
-      {
-      range_encoder.encode_bit( choice2, 1 );
-      range_encoder.encode_tree( bm_high, symbol - len_low_symbols - len_mid_symbols, len_high_bits );
-      }
-    }
-  if( --counters[pos_state] <= 0 ) update_prices( pos_state );
-  }
-
-
-void LZ_encoder::fill_align_prices() throw()
-  {
-  for( int i = 0; i < dis_align_size; ++i )
-    align_prices[i] = price_symbol_reversed( bm_align, i, dis_align_bits );
-  align_price_count = dis_align_size;
-  }
-
-
-void LZ_encoder::fill_distance_prices() throw()
-  {
-  for( int dis = start_dis_model; dis < modeled_distances; ++dis )
-    {
-    const int dis_slot = dis_slots.table( dis );
-    const int direct_bits = ( dis_slot >> 1 ) - 1;
-    const int base = ( 2 | ( dis_slot & 1 ) ) << direct_bits;
-    const int price =
-      price_symbol_reversed( bm_dis + base - dis_slot, dis - base, direct_bits );
-    for( int dis_state = 0; dis_state < max_dis_states; ++dis_state )
-      dis_prices[dis_state][dis] = price;
-    }
-
-  for( int dis_state = 0; dis_state < max_dis_states; ++dis_state )
-    {
-    int * const dsp = dis_slot_prices[dis_state];
-    const Bit_model * const bmds = bm_dis_slot[dis_state];
-    int slot = 0;
-    for( ; slot < end_dis_model && slot < num_dis_slots; ++slot )
-      dsp[slot] = price_symbol( bmds, slot, dis_slot_bits );
-    for( ; slot < num_dis_slots; ++slot )
-      dsp[slot] = price_symbol( bmds, slot, dis_slot_bits ) +
-                  (((( slot >> 1 ) - 1 ) - dis_align_bits ) << price_shift );
-
-    int * const dp = dis_prices[dis_state];
-    int dis = 0;
-    for( ; dis < start_dis_model; ++dis )
-      dp[dis] = dsp[dis];
-    for( ; dis < modeled_distances; ++dis )
-      dp[dis] += dsp[dis_slots.table( dis )];
-    }
-  }
-
-
-// Return value == number of bytes advanced (ahead).
-// trials[0]..trials[retval-1] contain the steps to encode.
-// ( trials[0].dis == -1 && trials[0].price == 1 ) means literal.
-int LZ_encoder::sequence_optimizer( const int reps[num_rep_distances],
-                                    const State & state )
-  {
-  int main_len;
-  if( longest_match_found > 0 )		// from previous call
-    {
-    main_len = longest_match_found;
-    longest_match_found = 0;
-    }
-  else main_len = read_match_distances();
-
-  int replens[num_rep_distances];
-  int rep_index = 0;
-  for( int i = 0; i < num_rep_distances; ++i )
-    {
-    replens[i] = matchfinder.true_match_len( 0, reps[i] + 1, max_match_len );
-    if( replens[i] > replens[rep_index] ) rep_index = i;
-    }
-  if( replens[rep_index] >= matchfinder.match_len_limit() )
-    {
-    trials[0].dis = rep_index;
-    trials[0].price = replens[rep_index];
-    if( !move_pos( replens[rep_index], true ) ) return 0;
-    return replens[rep_index];
-    }
-
-  if( main_len >= matchfinder.match_len_limit() )
-    {
-    trials[0].dis = match_distances[matchfinder.match_len_limit()] +
-                    num_rep_distances;
-    trials[0].price = main_len;
-    if( !move_pos( main_len, true ) ) return 0;
-    return main_len;
-    }
-
-  {
-  const int pos_state = matchfinder.data_position() & pos_state_mask;
-  const uint8_t prev_byte = matchfinder[-1];
-  const uint8_t cur_byte = matchfinder[0];
-  const uint8_t match_byte = matchfinder[-reps[0]-1];
-
-  trials[0].state = state;
-  for( int i = 0; i < num_rep_distances; ++i ) trials[0].reps[i] = reps[i];
-  trials[1].dis = -1;
-  trials[1].prev_index = 0;
-  trials[1].price = price0( bm_match[state()][pos_state] );
-  if( state.is_char() )
-    trials[1].price += literal_encoder.price_symbol( prev_byte, cur_byte );
-  else
-    trials[1].price += literal_encoder.price_matched( prev_byte, cur_byte, match_byte );
-
-  const int match_price = price1( bm_match[state()][pos_state] );
-  const int rep_match_price = match_price + price1( bm_rep[state()] );
-
-  if( match_byte == cur_byte )
-    trials[1].update( 0, 0, rep_match_price + price_rep_len1( state, pos_state ) );
-
-  if( main_len < min_match_len )
-    {
-    trials[0].dis = trials[1].dis;
-    trials[0].price = 1;
-    if( !matchfinder.move_pos() ) return 0;
-    return 1;
-    }
-
-  if( main_len <= replens[rep_index] )
-    {
-    main_len = replens[rep_index];
-    for( int len = min_match_len; len <= main_len; ++len )
-      trials[len].price = infinite_price;
-    }
-  else
-    {
-    const int normal_match_price = match_price + price0( bm_rep[state()] );
-    for( int len = min_match_len; len <= main_len; ++len )
-      {
-      trials[len].dis = match_distances[len] + num_rep_distances;
-      trials[len].prev_index = 0;
-      trials[len].price = normal_match_price +
-                          price_pair( match_distances[len], len, pos_state );
-      }
-    }
-
-  for( int rep = 0; rep < num_rep_distances; ++rep )
-    {
-    const int price = rep_match_price +
-                      price_rep( rep, state, pos_state );
-    for( int len = min_match_len; len <= replens[rep]; ++len )
-      trials[len].update( rep, 0, price +
-                                  rep_match_len_encoder.price( len, pos_state ) );
-    }
-  }
-
-  int cur = 0;
-  int num_trials = main_len;
-  if( !matchfinder.move_pos() ) return 0;
-
-  while( true )
-    {
-    if( ++cur >= num_trials )		// no more initialized trials
-      {
-      backward( cur );
-      return cur;
-      }
-    const int newlen = read_match_distances();
-    if( newlen >= matchfinder.match_len_limit() )
-      {
-      longest_match_found = newlen;
-      backward( cur );
-      return cur;
-      }
-
-    Trial & cur_trial = trials[cur];
-    const int prev_index = cur_trial.prev_index;
-
-    cur_trial.state = trials[prev_index].state;
-
-    for( int i = 0; i < num_rep_distances; ++i )
-      cur_trial.reps[i] = trials[prev_index].reps[i];
-    if( prev_index == cur - 1 )
-      {
-      if( cur_trial.dis == 0 ) cur_trial.state.set_short_rep();
-      else cur_trial.state.set_char();
-      }
-    else
-      {
-      if( cur_trial.dis < num_rep_distances ) cur_trial.state.set_rep();
-      else cur_trial.state.set_match();
-      mtf_reps( cur_trial.dis, cur_trial.reps );
-      }
-
-    const int pos_state = matchfinder.data_position() & pos_state_mask;
-    const uint8_t prev_byte = matchfinder[-1];
-    const uint8_t cur_byte = matchfinder[0];
-    const uint8_t match_byte = matchfinder[-cur_trial.reps[0]-1];
-
-    int next_price = cur_trial.price +
-                     price0( bm_match[cur_trial.state()][pos_state] );
-    if( cur_trial.state.is_char() )
-      next_price += literal_encoder.price_symbol( prev_byte, cur_byte );
-    else
-      next_price += literal_encoder.price_matched( prev_byte, cur_byte, match_byte );
-    if( !matchfinder.move_pos() ) return 0;
-
-    Trial & next_trial = trials[cur+1];
-
-    next_trial.update( -1, cur, next_price );
-
-    const int match_price = cur_trial.price + price1( bm_match[cur_trial.state()][pos_state] );
-    const int rep_match_price = match_price + price1( bm_rep[cur_trial.state()] );
-
-    if( match_byte == cur_byte && next_trial.dis != 0 )
-      next_trial.update( 0, cur, rep_match_price +
-                                 price_rep_len1( cur_trial.state, pos_state ) );
-
-    const int len_limit = std::min( std::min( max_num_trials - 1 - cur,
-                          matchfinder.available_bytes() ), matchfinder.match_len_limit() );
-    if( len_limit < min_match_len ) continue;
-
-    for( int rep = 0; rep < num_rep_distances; ++rep )
-      {
-      const int dis = cur_trial.reps[rep] + 1;
-      int len = 0;
-      const uint8_t * const data = matchfinder.ptr_to_current_pos() - 1;
-      while( len < len_limit && data[len] == data[len-dis] ) ++len;
-      if( len >= min_match_len )
-        {
-        const int price = rep_match_price +
-                          price_rep( rep, cur_trial.state, pos_state );
-        while( num_trials < cur + len )
-          trials[++num_trials].price = infinite_price;
-        for( ; len >= min_match_len; --len )
-          trials[cur+len].update( rep, cur, price +
-                                  rep_match_len_encoder.price( len, pos_state ) );
-        }
-      }
-
-    if( newlen <= len_limit &&
-        ( newlen > min_match_len ||
-          ( newlen == min_match_len &&
-            match_distances[min_match_len] < modeled_distances ) ) )
-      {
-      const int normal_match_price = match_price +
-                                     price0( bm_rep[cur_trial.state()] );
-      while( num_trials < cur + newlen )
-        trials[++num_trials].price = infinite_price;
-
-      int dis = match_distances[min_match_len];
-      int dis_state = get_dis_state( min_match_len );
-      int dis_price = infinite_price;
-      if( dis < modeled_distances )
-        trials[cur+min_match_len].update( dis + num_rep_distances, cur,
-                   normal_match_price + dis_prices[dis_state][dis] +
-                   len_encoder.price( min_match_len, pos_state ) );
-      for( int len = min_match_len + 1; len <= newlen; ++len )
-        {
-        if( dis != match_distances[len] || dis_state < max_dis_states - 1 )
-          {
-          dis = match_distances[len];
-          dis_state = get_dis_state( len );
-          dis_price = price_dis( dis, dis_state );
-          }
-        trials[cur+len].update( dis + num_rep_distances, cur,
-                                normal_match_price + dis_price +
-                                len_encoder.price( len, pos_state ) );
-        }
-      }
-    }
-  }
-
-
-     // End Of Stream mark => (dis == 0xFFFFFFFFU, len == min_match_len)
-bool LZ_encoder::full_flush( const State & state )
-  {
-  if( member_finished_ ||
-      range_encoder.free_bytes() < File_trailer::size() + max_marker_size )
-    return false;
-  const int pos_state = matchfinder.data_position() & pos_state_mask;
-  range_encoder.encode_bit( bm_match[state()][pos_state], 1 );
-  range_encoder.encode_bit( bm_rep[state()], 0 );
-  encode_pair( 0xFFFFFFFFU, min_match_len, pos_state );
-  range_encoder.flush();
-  File_trailer trailer;
-  trailer.data_crc( crc() );
-  trailer.data_size( matchfinder.data_position() );
-  trailer.member_size( range_encoder.member_position() + File_trailer::size() );
-  for( int i = 0; i < File_trailer::size(); ++i )
-    range_encoder.put_byte( trailer.data[i] );
-  return true;
-  }
-
-
-     // Sync Flush mark => (dis == 0xFFFFFFFFU, len == min_match_len + 1)
-bool LZ_encoder::sync_flush()
-  {
-  if( member_finished_ || range_encoder.free_bytes() < max_marker_size )
-    return false;
-  const State & state = main_state;
-  const int pos_state = matchfinder.data_position() & pos_state_mask;
-  range_encoder.encode_bit( bm_match[state()][pos_state], 1 );
-  range_encoder.encode_bit( bm_rep[state()], 0 );
-  encode_pair( 0xFFFFFFFFU, min_match_len + 1, pos_state );
-  range_encoder.flush();
-  return true;
-  }
-
-
-LZ_encoder::LZ_encoder( Matchfinder & mf, const File_header & header,
-                        const long long member_size )
-  :
-  member_size_limit( member_size - File_trailer::size() - max_marker_size ),
-  longest_match_found( 0 ),
-  crc_( 0xFFFFFFFFU ),
-  matchfinder( mf ),
-  len_encoder( matchfinder.match_len_limit() ),
-  rep_match_len_encoder( matchfinder.match_len_limit() ),
-  num_dis_slots( 2 * real_bits( matchfinder.dictionary_size() - 1 ) ),
-  fill_counter( 0 ),
-  member_finished_( false )
-  {
-  for( int i = 0; i < num_rep_distances; ++i ) rep_distances[i] = 0;
-  fill_align_prices();
-
-  for( int i = 0; i < File_header::size; ++i )
-    range_encoder.put_byte( header.data[i] );
-  }
-
-
-bool LZ_encoder::encode_member( const bool finish )
-  {
-  const int fill_count = ( matchfinder.match_len_limit() > 12 ) ? 512 : 2048;
-  State & state = main_state;
-  if( member_finished_ ) return true;
-  if( range_encoder.member_position() >= member_size_limit )
-    { if( full_flush( state ) ) { member_finished_ = true; } return true; }
-
-  // encode first byte
-  if( matchfinder.data_position() == 0 && !matchfinder.finished() )
-    {
-    if( matchfinder.available_bytes() < 4 && !matchfinder.at_stream_end() )
-      return true;
-    const uint8_t prev_byte = 0;
-    const uint8_t cur_byte = matchfinder[0];
-    range_encoder.encode_bit( bm_match[state()][0], 0 );
-    literal_encoder.encode( range_encoder, prev_byte, cur_byte );
-    crc32.update( crc_, cur_byte );
-    if( !move_pos( 1 ) ) return false;
-    }
-
-  while( true )
-    {
-    if( matchfinder.finished() )
-      {
-      if( finish && full_flush( state ) ) member_finished_ = true;
-      return true;
-      }
-    if( !matchfinder.enough_available_bytes() ||
-        !range_encoder.enough_free_bytes() ) return true;
-    if( fill_counter <= 0 )
-      { fill_distance_prices(); fill_counter = fill_count; }
-
-    int ahead = sequence_optimizer( rep_distances, state );
-    if( ahead <= 0 ) return false;
-    fill_counter -= ahead;
-
-    for( int i = 0; ; )
-      {
-      const int pos_state =
-        ( matchfinder.data_position() - ahead ) & pos_state_mask;
-      const int dis = trials[i].dis;
-      const int len = trials[i].price;
-
-      bool bit = ( dis < 0 && len == 1 );
-      range_encoder.encode_bit( bm_match[state()][pos_state], !bit );
-      if( bit )				// literal byte
-        {
-        const uint8_t prev_byte = matchfinder[-ahead-1];
-        const uint8_t cur_byte = matchfinder[-ahead];
-        crc32.update( crc_, cur_byte );
-        if( state.is_char() )
-          literal_encoder.encode( range_encoder, prev_byte, cur_byte );
-        else
-          {
-          const uint8_t match_byte = matchfinder[-ahead-rep_distances[0]-1];
-          literal_encoder.encode_matched( range_encoder,
-                                          prev_byte, cur_byte, match_byte );
-          }
-        state.set_char();
-        }
-      else				// match or repeated match
-        {
-        crc32.update( crc_, matchfinder.ptr_to_current_pos() - ahead, len );
-        mtf_reps( dis, rep_distances );
-        bit = ( dis < num_rep_distances );
-        range_encoder.encode_bit( bm_rep[state()], bit );
-        if( bit )
-          {
-          bit = ( dis == 0 );
-          range_encoder.encode_bit( bm_rep0[state()], !bit );
-          if( bit )
-            range_encoder.encode_bit( bm_len[state()][pos_state], len > 1 );
-          else
-            {
-            range_encoder.encode_bit( bm_rep1[state()], dis > 1 );
-            if( dis > 1 )
-              range_encoder.encode_bit( bm_rep2[state()], dis > 2 );
-            }
-          if( len == 1 ) state.set_short_rep();
-          else
-            {
-            rep_match_len_encoder.encode( range_encoder, len, pos_state );
-            state.set_rep();
-            }
-          }
-        else
-          {
-          encode_pair( dis - num_rep_distances, len, pos_state );
-          state.set_match();
-          }
-        }
-      ahead -= len; i += len;
-      if( range_encoder.member_position() >= member_size_limit )
-        {
-        if( !matchfinder.dec_pos( ahead ) ) return false;
-        if( full_flush( state ) ) member_finished_ = true;
-        return true;
-        }
-      if( ahead <= 0 ) break;
-      }
-    }
-  }
-
-} // end namespace Lzlib