Adding upstream version 1.13~rc1.upstream/1.13_rc1

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

1 files changed, 323 insertions, 0 deletions

diff --git a/lzip.h b/lzip.h
new file mode 100644
index 0000000..440ce71
--- /dev/null
+++ b/lzip.h
@@ -0,0 +1,323 @@
+/*  Lziprecover - Data recovery tool for lzipped files
+    Copyright (C) 2009, 2010, 2011 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 3 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/>.
+*/
+
+class State
+  {
+  unsigned char st;
+
+public:
+  enum { states = 12 };
+  State() throw() : st( 0 ) {}
+  unsigned char operator()() const throw() { return st; }
+  bool is_char() const throw() { return st < 7; }
+
+  void set_char() throw()
+    {
+    static const unsigned char next[states] =
+      { 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5 };
+    st = next[st];
+    }
+
+  void set_match() throw()
+    {
+    static const unsigned char next[states] =
+      { 7, 7, 7, 7, 7, 7, 7, 10, 10, 10, 10, 10 };
+    st = next[st];
+    }
+
+  void set_rep() throw()
+    {
+    static const unsigned char next[states] =
+      { 8, 8, 8, 8, 8, 8, 8, 11, 11, 11, 11, 11 };
+    st = next[st];
+    }
+
+  void set_short_rep() throw()
+    {
+    static const unsigned char next[states] =
+      { 9, 9, 9, 9, 9, 9, 9, 11, 11, 11, 11, 11 };
+    st = next[st];
+    }
+  };
+
+
+enum {
+  min_dictionary_bits = 12,
+  min_dictionary_size = 1 << min_dictionary_bits,
+  max_dictionary_bits = 29,
+  max_dictionary_size = 1 << max_dictionary_bits,
+  literal_context_bits = 3,
+  pos_state_bits = 2,
+  pos_states = 1 << pos_state_bits,
+  pos_state_mask = pos_states - 1,
+
+  dis_slot_bits = 6,
+  start_dis_model = 4,
+  end_dis_model = 14,
+  modeled_distances = 1 << (end_dis_model / 2),
+  dis_align_bits = 4,
+  dis_align_size = 1 << dis_align_bits,
+
+  len_low_bits = 3,
+  len_mid_bits = 3,
+  len_high_bits = 8,
+  len_low_symbols = 1 << len_low_bits,
+  len_mid_symbols = 1 << len_mid_bits,
+  len_high_symbols = 1 << len_high_bits,
+  max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols,
+
+  min_match_len = 2,					// must be 2
+  max_match_len = min_match_len + max_len_symbols - 1,	// 273
+  min_match_len_limit = 5,
+
+  max_dis_states = 4 };
+
+inline int get_dis_state( int len ) throw()
+  {
+  len -= min_match_len;
+  if( len >= max_dis_states ) len = max_dis_states - 1;
+  return len;
+  }
+
+
+enum { bit_model_move_bits = 5,
+       bit_model_total_bits = 11,
+       bit_model_total = 1 << bit_model_total_bits };
+
+struct Bit_model
+  {
+  unsigned int probability;
+  Bit_model() throw() : probability( bit_model_total / 2 ) {}
+  };
+
+
+class Pretty_print
+  {
+  const char * const stdin_name;
+  unsigned int longest_name;
+  const int verbosity_;
+  std::string name_;
+  mutable bool first_post;
+
+public:
+  Pretty_print( const std::vector< std::string > & filenames, const int v )
+    : stdin_name( "(stdin)" ), longest_name( 0 ), verbosity_( v ),
+      first_post( false )
+    {
+    const unsigned int stdin_name_len = std::strlen( stdin_name );
+    for( unsigned int i = 0; i < filenames.size(); ++i )
+      {
+      const std::string & s = filenames[i];
+      const unsigned int len = ( ( s == "-" ) ? stdin_name_len : s.size() );
+      if( len > longest_name ) longest_name = len;
+      }
+    if( longest_name == 0 ) longest_name = stdin_name_len;
+    }
+
+  void set_name( const std::string & filename )
+    {
+    if( filename.size() && filename != "-" ) name_ = filename;
+    else name_ = stdin_name;
+    first_post = true;
+    }
+
+  void reset() const throw() { if( name_.size() ) first_post = true; }
+  const char * name() const throw() { return name_.c_str(); }
+  int verbosity() const throw() { return verbosity_; }
+  void operator()( const char * const msg = 0 ) const throw();
+  };
+
+
+class CRC32
+  {
+  uint32_t data[256];		// Table of CRCs of all 8-bit messages.
+
+public:
+  CRC32()
+    {
+    for( unsigned int n = 0; n < 256; ++n )
+      {
+      unsigned int c = n;
+      for( int k = 0; k < 8; ++k )
+        { if( c & 1 ) c = 0xEDB88320U ^ ( c >> 1 ); else c >>= 1; }
+      data[n] = c;
+      }
+    }
+
+  uint32_t operator[]( const uint8_t byte ) const throw() { return data[byte]; }
+  void update( uint32_t & crc, const uint8_t byte ) const throw()
+    { crc = data[(crc^byte)&0xFF] ^ ( crc >> 8 ); }
+  void update( uint32_t & crc, const uint8_t * const buffer, const int size ) const throw()
+    {
+    for( int i = 0; i < size; ++i )
+      crc = data[(crc^buffer[i])&0xFF] ^ ( crc >> 8 );
+    }
+  };
+
+extern const CRC32 crc32;
+
+
+inline int real_bits( const int value ) throw()
+  {
+  int bits = 0;
+  for( int i = 1, mask = 1; mask > 0; ++i, mask <<= 1 )
+    if( value & mask ) bits = i;
+  return bits;
+  }
+
+const uint8_t magic_string[4] = { 'L', 'Z', 'I', 'P' };
+
+struct File_header
+  {
+  uint8_t data[6];			// 0-3 magic bytes
+					//   4 version
+					//   5 coded_dict_size
+  enum { size = 6 };
+
+  void set_magic() throw()
+    { std::memcpy( data, magic_string, 4 ); data[4] = 1; }
+
+  bool verify_magic() const throw()
+    { return ( std::memcmp( data, magic_string, 4 ) == 0 ); }
+
+  uint8_t version() const throw() { return data[4]; }
+  bool verify_version() const throw() { return ( data[4] <= 1 ); }
+
+  int dictionary_size() const throw()
+    {
+    int sz = ( 1 << ( data[5] & 0x1F ) );
+    if( sz > min_dictionary_size && sz <= max_dictionary_size )
+      sz -= ( sz / 16 ) * ( ( data[5] >> 5 ) & 0x07 );
+    return sz;
+    }
+
+  bool dictionary_size( const int sz ) throw()
+    {
+    if( sz >= min_dictionary_size && sz <= max_dictionary_size )
+      {
+      data[5] = real_bits( sz - 1 );
+      if( sz > min_dictionary_size )
+        {
+        const int base_size = 1 << data[5];
+        const int wedge = base_size / 16;
+        for( int i = 7; i >= 1; --i )
+          if( base_size - ( i * wedge ) >= sz )
+            { data[5] |= ( i << 5 ); break; }
+        }
+      return true;
+      }
+    return false;
+    }
+  };
+
+
+struct File_trailer
+  {
+  uint8_t data[20];	//  0-3  CRC32 of the uncompressed data
+			//  4-11 size of the uncompressed data
+			// 12-19 member size including header and trailer
+
+  static int size( const int version = 1 )
+    { return ( ( version >= 1 ) ? 20 : 12 ); }
+
+  uint32_t data_crc() const throw()
+    {
+    uint32_t tmp = 0;
+    for( int i = 3; i >= 0; --i ) { tmp <<= 8; tmp += data[i]; }
+    return tmp;
+    }
+
+  void data_crc( uint32_t crc ) throw()
+    { for( int i = 0; i <= 3; ++i ) { data[i] = (uint8_t)crc; crc >>= 8; } }
+
+  long long data_size() const throw()
+    {
+    long long tmp = 0;
+    for( int i = 11; i >= 4; --i ) { tmp <<= 8; tmp += data[i]; }
+    return tmp;
+    }
+
+  void data_size( long long sz ) throw()
+    {
+    for( int i = 4; i <= 11; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
+    }
+
+  long long member_size() const throw()
+    {
+    long long tmp = 0;
+    for( int i = 19; i >= 12; --i ) { tmp <<= 8; tmp += data[i]; }
+    return tmp;
+    }
+
+  void member_size( long long sz ) throw()
+    {
+    for( int i = 12; i <= 19; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
+    }
+  };
+
+
+struct Error
+  {
+  const char * const msg;
+  Error( const char * const s ) throw() : msg( s ) {}
+  };
+
+
+#ifndef LLONG_MAX
+#define LLONG_MAX  0x7FFFFFFFFFFFFFFFLL
+#endif
+#ifndef LLONG_MIN
+#define LLONG_MIN  (-LLONG_MAX - 1LL)
+#endif
+#ifndef ULLONG_MAX
+#define ULLONG_MAX 0xFFFFFFFFFFFFFFFFULL
+#endif
+
+
+// defined in decoder.cc
+int readblock( const int fd, uint8_t * const buf, const int size ) throw();
+int writeblock( const int fd, const uint8_t * const buf, const int size ) throw();
+
+// defined in main.cc
+extern int verbosity;
+int open_instream( const std::string & name, struct stat * const in_statsp,
+                   const bool to_stdout, const bool reg_only = false ) throw();
+int open_outstream_rw( const std::string & output_filename,
+                       const bool force ) throw();
+void show_error( const char * const msg, const int errcode = 0,
+                 const bool help = false ) throw();
+void internal_error( const char * const msg );
+
+// defined in merge.cc
+void cleanup_and_fail( const std::string & output_filename,
+                       const int outfd, const int retval ) throw();
+bool copy_file( const int infd, const int outfd,
+                const long long size = LLONG_MAX );
+bool try_decompress( const int fd, const long long file_size,
+                     long long * failure_posp = 0 );
+bool verify_header( const File_header & header );
+bool verify_single_member( const int fd, const long long file_size );
+int merge_files( const std::vector< std::string > & filenames,
+                 const std::string & output_filename, const bool force );
+
+// defined in repair.cc
+int repair_file( const std::string & input_filename,
+                 const std::string & output_filename, const bool force );
+
+// defined in split.cc
+int split_file( const std::string & input_filename,
+                const std::string & default_output_filename, const bool force );