Merging upstream version 1.3.

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

1 files changed, 543 insertions, 0 deletions

diff --git a/lzlib.c b/lzlib.c
new file mode 100644
index 0000000..3ee8ce3
--- /dev/null
+++ b/lzlib.c
@@ -0,0 +1,543 @@
+/*  Lzlib - A compression library for lzip files
+    Copyright (C) 2009, 2010, 2011, 2012 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.
+*/
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "lzlib.h"
+#include "clzip.h"
+#include "tables.c"
+#include "decoder.c"
+#include "encoder.c"
+
+
+struct LZ_Encoder
+  {
+  long long partial_in_size;
+  long long partial_out_size;
+  struct Matchfinder * matchfinder;
+  struct LZ_encoder * lz_encoder;
+  enum LZ_Errno lz_errno;
+  int flush_pending;
+  File_header member_header;
+  bool fatal;
+  };
+
+static void LZ_Encoder_init( struct LZ_Encoder * const e,
+                             const File_header header )
+  {
+  int i;
+  e->partial_in_size = 0;
+  e->partial_out_size = 0;
+  e->matchfinder = 0;
+  e->lz_encoder = 0;
+  e->lz_errno = LZ_ok;
+  e->flush_pending = 0;
+  for( i = 0; i < Fh_size; ++i ) e->member_header[i] = header[i];
+  e->fatal = false;
+  }
+
+
+struct LZ_Decoder
+  {
+  long long partial_in_size;
+  long long partial_out_size;
+  struct Range_decoder * rdec;
+  struct LZ_decoder * lz_decoder;
+  enum LZ_Errno lz_errno;
+  File_header member_header;		/* header of current member */
+  bool fatal;
+  bool seeking;
+  };
+
+static void LZ_Decoder_init( struct LZ_Decoder * const d )
+  {
+  int i;
+  d->partial_in_size = 0;
+  d->partial_out_size = 0;
+  d->rdec = 0;
+  d->lz_decoder = 0;
+  d->lz_errno = LZ_ok;
+  for( i = 0; i < Fh_size; ++i ) d->member_header[i] = 0;
+  d->fatal = false;
+  d->seeking = false;
+  }
+
+
+static bool verify_encoder( struct LZ_Encoder * const e )
+  {
+  if( !e ) return false;
+  if( !e->matchfinder || !e->lz_encoder )
+    { e->lz_errno = LZ_bad_argument; return false; }
+  return true;
+  }
+
+
+static bool verify_decoder( struct LZ_Decoder * const d )
+  {
+  if( !d ) return false;
+  if( !d->rdec )
+    { d->lz_errno = LZ_bad_argument; return false; }
+  return true;
+  }
+
+
+/*------------------------- Misc Functions -------------------------*/
+
+const char * LZ_version( void ) { return LZ_version_string; }
+
+
+const char * LZ_strerror( const enum LZ_Errno lz_errno )
+  {
+  switch( lz_errno )
+    {
+    case LZ_ok            : return "ok";
+    case LZ_bad_argument  : return "bad argument";
+    case LZ_mem_error     : return "not enough memory";
+    case LZ_sequence_error: return "sequence error";
+    case LZ_header_error  : return "header error";
+    case LZ_unexpected_eof: return "unexpected eof";
+    case LZ_data_error    : return "data error";
+    case LZ_library_error : return "library error";
+    }
+  return "invalid error code";
+  }
+
+
+int LZ_min_dictionary_bits( void ) { return min_dictionary_bits; }
+int LZ_min_dictionary_size( void ) { return min_dictionary_size; }
+int LZ_max_dictionary_bits( void ) { return max_dictionary_bits; }
+int LZ_max_dictionary_size( void ) { return max_dictionary_size; }
+int LZ_min_match_len_limit( void ) { return min_match_len_limit; }
+int LZ_max_match_len_limit( void ) { return max_match_len; }
+
+
+/*---------------------- Compression Functions ----------------------*/
+
+struct LZ_Encoder * LZ_compress_open( const int dictionary_size,
+                                      const int match_len_limit,
+                                      const long long member_size )
+  {
+  File_header header;
+  Fh_set_magic( header );
+  const bool error = ( !Fh_set_dictionary_size( header, dictionary_size ) ||
+                       match_len_limit < min_match_len_limit ||
+                       match_len_limit > max_match_len );
+
+  struct LZ_Encoder * const e =
+    (struct LZ_Encoder *)malloc( sizeof (struct LZ_Encoder) );
+  if( !e ) return 0;
+  LZ_Encoder_init( e, header );
+  if( error ) e->lz_errno = LZ_bad_argument;
+  else
+    {
+    e->matchfinder = (struct Matchfinder *)malloc( sizeof (struct Matchfinder) );
+    e->lz_encoder = (struct LZ_encoder *)malloc( sizeof (struct LZ_encoder) );
+    if( !e->matchfinder || !e->lz_encoder ||
+        !Mf_init( e->matchfinder,
+                  Fh_get_dictionary_size( header ), match_len_limit ) ||
+        !LZe_init( e->lz_encoder, e->matchfinder, header, member_size ) )
+      {
+      if( e->matchfinder )
+        { Mf_free( e->matchfinder ); free( e->matchfinder ); e->matchfinder = 0; }
+      if( e->lz_encoder )
+        { LZe_free( e->lz_encoder ); free( e->lz_encoder ); e->lz_encoder = 0; }
+      e->lz_errno = LZ_mem_error;
+      }
+    }
+  if( e->lz_errno != LZ_ok ) e->fatal = true;
+  return e;
+  }
+
+
+int LZ_compress_close( struct LZ_Encoder * const e )
+  {
+  if( !e ) return -1;
+  if( e->lz_encoder )
+    { LZe_free( e->lz_encoder ); free( e->lz_encoder ); }
+  if( e->matchfinder )
+   { Mf_free( e->matchfinder ); free( e->matchfinder ); }
+  free( e );
+  return 0;
+  }
+
+
+int LZ_compress_finish( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) || e->fatal ) return -1;
+  Mf_set_flushing( e->matchfinder, true );
+  e->flush_pending = 0;
+  return 0;
+  }
+
+
+int LZ_compress_restart_member( struct LZ_Encoder * const e,
+                                const long long member_size )
+  {
+  if( !verify_encoder( e ) || e->fatal ) return -1;
+  if( !LZe_member_finished( e->lz_encoder ) )
+    { e->lz_errno = LZ_sequence_error; return -1; }
+
+  e->partial_in_size += Mf_data_position( e->matchfinder );
+  e->partial_out_size += Re_member_position( &e->lz_encoder->range_encoder );
+  Mf_reset( e->matchfinder );
+
+  LZe_free( e->lz_encoder ); free( e->lz_encoder );
+  e->lz_encoder = (struct LZ_encoder *)malloc( sizeof (struct LZ_encoder) );
+  if( !e->lz_encoder ||
+      !LZe_init( e->lz_encoder, e->matchfinder, e->member_header, member_size ) )
+    {
+    if( e->lz_encoder )
+      { LZe_free( e->lz_encoder ); free( e->lz_encoder ); e->lz_encoder = 0; }
+    e->lz_errno = LZ_mem_error; e->fatal = true;
+    return -1;
+    }
+  e->lz_errno = LZ_ok;
+  return 0;
+  }
+
+
+int LZ_compress_sync_flush( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) || e->fatal ) return -1;
+  if( !e->flush_pending && !e->matchfinder->at_stream_end )
+    {
+    e->flush_pending = 2;	/* 2 consecutive markers guarantee decoding */
+    Mf_set_flushing( e->matchfinder, true );
+    if( !LZe_encode_member( e->lz_encoder, false ) )
+      { e->lz_errno = LZ_library_error; e->fatal = true; return -1; }
+    while( e->flush_pending > 0 && LZe_sync_flush( e->lz_encoder ) )
+      { if( --e->flush_pending <= 0 ) Mf_set_flushing( e->matchfinder, false ); }
+    }
+  return 0;
+  }
+
+
+int LZ_compress_read( struct LZ_Encoder * const e,
+                      uint8_t * const buffer, const int size )
+  {
+  if( !verify_encoder( e ) || e->fatal ) return -1;
+  if( !LZe_encode_member( e->lz_encoder, !e->flush_pending ) )
+    { e->lz_errno = LZ_library_error; e->fatal = true; return -1; }
+  while( e->flush_pending > 0 && LZe_sync_flush( e->lz_encoder ) )
+    { if( --e->flush_pending <= 0 ) Mf_set_flushing( e->matchfinder, false ); }
+  return Re_read_data( &e->lz_encoder->range_encoder, buffer, size );
+  }
+
+
+int LZ_compress_write( struct LZ_Encoder * const e,
+                       const uint8_t * const buffer, const int size )
+  {
+  if( !verify_encoder( e ) || e->fatal ) return -1;
+  if( e->flush_pending ) return 0;
+  return Mf_write_data( e->matchfinder, buffer, size );
+  }
+
+
+int LZ_compress_write_size( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) || e->fatal ) return -1;
+  if( e->flush_pending ) return 0;
+  return Mf_free_bytes( e->matchfinder );
+  }
+
+
+enum LZ_Errno LZ_compress_errno( struct LZ_Encoder * const e )
+  {
+  if( !e ) return LZ_bad_argument;
+  return e->lz_errno;
+  }
+
+
+int LZ_compress_finished( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) ) return -1;
+  return ( !e->flush_pending && Mf_finished( e->matchfinder ) &&
+           LZe_member_finished( e->lz_encoder ) );
+  }
+
+
+int LZ_compress_member_finished( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) ) return -1;
+  return LZe_member_finished( e->lz_encoder );
+  }
+
+
+long long LZ_compress_data_position( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) ) return -1;
+  return Mf_data_position( e->matchfinder );
+  }
+
+
+long long LZ_compress_member_position( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) ) return -1;
+  return Re_member_position( &e->lz_encoder->range_encoder );
+  }
+
+
+long long LZ_compress_total_in_size( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) ) return -1;
+  return e->partial_in_size + Mf_data_position( e->matchfinder );
+  }
+
+
+long long LZ_compress_total_out_size( struct LZ_Encoder * const e )
+  {
+  if( !verify_encoder( e ) ) return -1;
+  return e->partial_out_size +
+         Re_member_position( &e->lz_encoder->range_encoder );
+  }
+
+
+/*--------------------- Decompression Functions ---------------------*/
+
+struct LZ_Decoder * LZ_decompress_open( void )
+  {
+  struct LZ_Decoder * const d =
+    (struct LZ_Decoder *)malloc( sizeof (struct LZ_Decoder) );
+  if( !d ) return 0;
+  LZ_Decoder_init( d );
+
+  d->rdec = (struct Range_decoder *)malloc( sizeof (struct Range_decoder) );
+  if( !d->rdec || !Rd_init( d->rdec ) )
+    {
+    if( d->rdec ) { Rd_free( d->rdec ); free( d->rdec ); d->rdec = 0; }
+    d->lz_errno = LZ_mem_error; d->fatal = true;
+    }
+  return d;
+  }
+
+
+int LZ_decompress_close( struct LZ_Decoder * const d )
+  {
+  if( !d ) return -1;
+  if( d->lz_decoder )
+    { LZd_free( d->lz_decoder ); free( d->lz_decoder ); }
+  if( d->rdec ) { Rd_free( d->rdec ); free( d->rdec ); }
+  free( d );
+  return 0;
+  }
+
+
+int LZ_decompress_finish( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) || d->fatal ) return -1;
+  if( d->seeking ) { d->seeking = false; Rd_purge( d->rdec ); }
+  else Rd_finish( d->rdec );
+  return 0;
+  }
+
+
+int LZ_decompress_reset( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  if( d->lz_decoder )
+    { LZd_free( d->lz_decoder ); free( d->lz_decoder ); d->lz_decoder = 0; }
+  d->partial_in_size = 0;
+  d->partial_out_size = 0;
+  Rd_reset( d->rdec );
+  d->lz_errno = LZ_ok;
+  d->fatal = false;
+  d->seeking = false;
+  return 0;
+  }
+
+
+int LZ_decompress_sync_to_member( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  if( d->lz_decoder )
+    { LZd_free( d->lz_decoder ); free( d->lz_decoder ); d->lz_decoder = 0; }
+  if( Rd_find_header( d->rdec ) ) d->seeking = false;
+  else
+    {
+    if( !d->rdec->at_stream_end ) d->seeking = true;
+    else { d->seeking = false; Rd_purge( d->rdec ); }
+    }
+  d->lz_errno = LZ_ok;
+  d->fatal = false;
+  return 0;
+  }
+
+
+int LZ_decompress_read( struct LZ_Decoder * const d,
+                        uint8_t * const buffer, const int size )
+  {
+  if( !verify_decoder( d ) || d->fatal ) return -1;
+  if( d->seeking ) return 0;
+  if( d->lz_decoder && LZd_member_finished( d->lz_decoder ) )
+    {
+    d->partial_in_size += d->rdec->member_position ;
+    d->partial_out_size += LZd_data_position( d->lz_decoder );
+    LZd_free( d->lz_decoder ); free( d->lz_decoder ); d->lz_decoder = 0;
+    }
+  if( !d->lz_decoder )
+    {
+    if( Rd_available_bytes( d->rdec ) < 5 + Fh_size )
+      {
+      if( !d->rdec->at_stream_end || Rd_finished( d->rdec ) ) return 0;
+      Rd_purge( d->rdec );		/* remove trailing garbage */
+      d->lz_errno = LZ_header_error;
+      d->fatal = true;
+      return -1;
+      }
+    if( !Rd_read_header( d->rdec, d->member_header ) )
+      {
+      d->lz_errno = LZ_header_error;
+      d->fatal = true;
+      return -1;
+      }
+    d->lz_decoder = (struct LZ_decoder *)malloc( sizeof (struct LZ_decoder) );
+    if( !d->lz_decoder || !LZd_init( d->lz_decoder, d->member_header, d->rdec ) )
+      {					/* not enough free memory */
+      if( d->lz_decoder )
+        { LZd_free( d->lz_decoder ); free( d->lz_decoder ); d->lz_decoder = 0; }
+      d->lz_errno = LZ_mem_error;
+      d->fatal = true;
+      return -1;
+      }
+    }
+  const int result = LZd_decode_member( d->lz_decoder );
+  if( result != 0 )
+    {
+    if( result == 2 ) d->lz_errno = LZ_unexpected_eof;
+    else d->lz_errno = LZ_data_error;
+    d->fatal = true;
+    return -1;
+    }
+  return Cb_read_data( &d->lz_decoder->cb, buffer, size );
+  }
+
+
+int LZ_decompress_write( struct LZ_Decoder * const d,
+                         const uint8_t * const buffer, const int size )
+  {
+  if( !verify_decoder( d ) || d->fatal ) return -1;
+  int result = Rd_write_data( d->rdec, buffer, size );
+  while( d->seeking )
+    {
+    if( Rd_find_header( d->rdec ) ) d->seeking = false;
+    if( result >= size ) break;
+    const int size2 = Rd_write_data( d->rdec, buffer + result, size - result );
+    if( size2 > 0 ) result += size2;
+    else break;
+    }
+  return result;
+  }
+
+
+int LZ_decompress_write_size( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) || d->fatal ) return -1;
+  return Rd_free_bytes( d->rdec );
+  }
+
+
+enum LZ_Errno LZ_decompress_errno( struct LZ_Decoder * const d )
+  {
+  if( !d ) return LZ_bad_argument;
+  return d->lz_errno;
+  }
+
+
+int LZ_decompress_finished( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  return ( Rd_finished( d->rdec ) &&
+           ( !d->lz_decoder || LZd_member_finished( d->lz_decoder ) ) );
+  }
+
+
+int LZ_decompress_member_finished( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  return ( d->lz_decoder && LZd_member_finished( d->lz_decoder ) );
+  }
+
+
+int LZ_decompress_member_version( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  return Fh_version( d->member_header );
+  }
+
+
+int LZ_decompress_dictionary_size( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  return Fh_get_dictionary_size( d->member_header );
+  }
+
+
+unsigned int LZ_decompress_data_crc( struct LZ_Decoder * const d )
+  {
+  if( verify_decoder( d ) && d->lz_decoder )
+    return LZd_crc( d->lz_decoder );
+  else return 0;
+  }
+
+
+long long LZ_decompress_data_position( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  if( d->lz_decoder )
+    return LZd_data_position( d->lz_decoder );
+  else return 0;
+  }
+
+
+long long LZ_decompress_member_position( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  if( d->lz_decoder )
+    return d->rdec->member_position ;
+  else return 0;
+  }
+
+
+long long LZ_decompress_total_in_size( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  if( d->lz_decoder )
+    return d->partial_in_size + d->rdec->member_position ;
+  return d->partial_in_size;
+  }
+
+
+long long LZ_decompress_total_out_size( struct LZ_Decoder * const d )
+  {
+  if( !verify_decoder( d ) ) return -1;
+  if( d->lz_decoder )
+    return d->partial_out_size + LZd_data_position( d->lz_decoder );
+  return d->partial_out_size;
+  }