Merging upstream version 1.4.

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

1 files changed, 298 insertions, 0 deletions

diff --git a/lzip.h b/lzip.h
new file mode 100644
index 0000000..d3b1254
--- /dev/null
+++ b/lzip.h
@@ -0,0 +1,298 @@
+/*  Lzlib - A compression library for lzip files
+    Copyright (C) 2009, 2010, 2011, 2012, 2013 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.
+*/
+
+#ifndef max
+  #define max(x,y) ((x) >= (y) ? (x) : (y))
+#endif
+#ifndef min
+  #define min(x,y) ((x) <= (y) ? (x) : (y))
+#endif
+
+typedef int State;
+
+enum { states = 12 };
+
+static inline bool St_is_char( const State st ) { return st < 7; }
+
+static inline State St_set_char( const State st )
+  {
+  static const State next[states] = { 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 4, 5 };
+  return next[st];
+  }
+
+static inline State St_set_match( const State st )
+  { return ( ( st < 7 ) ? 7 : 10 ); }
+
+static inline State St_set_rep( const State st )
+  { return ( ( st < 7 ) ? 8 : 11 ); }
+
+static inline State St_set_short_rep( const State st )
+  { return ( ( st < 7 ) ? 9 : 11 ); }
+
+
+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),		/* 128 */
+  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 };
+
+static inline int get_dis_state( const int len )
+  { return min( len - min_match_len, max_dis_states - 1 ); }
+
+static inline int get_lit_state( const uint8_t prev_byte )
+  { return ( prev_byte >> ( 8 - literal_context_bits ) ); }
+
+
+enum { bit_model_move_bits = 5,
+       bit_model_total_bits = 11,
+       bit_model_total = 1 << bit_model_total_bits };
+
+typedef int Bit_model;
+
+static inline void Bm_init( Bit_model * const probability )
+  { *probability = bit_model_total / 2; }
+
+static inline void Bm_array_init( Bit_model * const p, const int size )
+  { int i = 0; while( i < size ) p[i++] = 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];
+  };
+
+static inline void Lm_init( struct Len_model * const lm )
+  {
+  Bm_init( &lm->choice1 );
+  Bm_init( &lm->choice2 );
+  Bm_array_init( lm->bm_low[0], pos_states * len_low_symbols );
+  Bm_array_init( lm->bm_mid[0], pos_states * len_mid_symbols );
+  Bm_array_init( lm->bm_high, len_high_symbols );
+  }
+
+
+/* Table of CRCs of all 8-bit messages. */
+static const uint32_t crc32[256] =
+  {
+  0x00000000, 0x77073096, 0xEE0E612C, 0x990951BA, 0x076DC419, 0x706AF48F,
+  0xE963A535, 0x9E6495A3, 0x0EDB8832, 0x79DCB8A4, 0xE0D5E91E, 0x97D2D988,
+  0x09B64C2B, 0x7EB17CBD, 0xE7B82D07, 0x90BF1D91, 0x1DB71064, 0x6AB020F2,
+  0xF3B97148, 0x84BE41DE, 0x1ADAD47D, 0x6DDDE4EB, 0xF4D4B551, 0x83D385C7,
+  0x136C9856, 0x646BA8C0, 0xFD62F97A, 0x8A65C9EC, 0x14015C4F, 0x63066CD9,
+  0xFA0F3D63, 0x8D080DF5, 0x3B6E20C8, 0x4C69105E, 0xD56041E4, 0xA2677172,
+  0x3C03E4D1, 0x4B04D447, 0xD20D85FD, 0xA50AB56B, 0x35B5A8FA, 0x42B2986C,
+  0xDBBBC9D6, 0xACBCF940, 0x32D86CE3, 0x45DF5C75, 0xDCD60DCF, 0xABD13D59,
+  0x26D930AC, 0x51DE003A, 0xC8D75180, 0xBFD06116, 0x21B4F4B5, 0x56B3C423,
+  0xCFBA9599, 0xB8BDA50F, 0x2802B89E, 0x5F058808, 0xC60CD9B2, 0xB10BE924,
+  0x2F6F7C87, 0x58684C11, 0xC1611DAB, 0xB6662D3D, 0x76DC4190, 0x01DB7106,
+  0x98D220BC, 0xEFD5102A, 0x71B18589, 0x06B6B51F, 0x9FBFE4A5, 0xE8B8D433,
+  0x7807C9A2, 0x0F00F934, 0x9609A88E, 0xE10E9818, 0x7F6A0DBB, 0x086D3D2D,
+  0x91646C97, 0xE6635C01, 0x6B6B51F4, 0x1C6C6162, 0x856530D8, 0xF262004E,
+  0x6C0695ED, 0x1B01A57B, 0x8208F4C1, 0xF50FC457, 0x65B0D9C6, 0x12B7E950,
+  0x8BBEB8EA, 0xFCB9887C, 0x62DD1DDF, 0x15DA2D49, 0x8CD37CF3, 0xFBD44C65,
+  0x4DB26158, 0x3AB551CE, 0xA3BC0074, 0xD4BB30E2, 0x4ADFA541, 0x3DD895D7,
+  0xA4D1C46D, 0xD3D6F4FB, 0x4369E96A, 0x346ED9FC, 0xAD678846, 0xDA60B8D0,
+  0x44042D73, 0x33031DE5, 0xAA0A4C5F, 0xDD0D7CC9, 0x5005713C, 0x270241AA,
+  0xBE0B1010, 0xC90C2086, 0x5768B525, 0x206F85B3, 0xB966D409, 0xCE61E49F,
+  0x5EDEF90E, 0x29D9C998, 0xB0D09822, 0xC7D7A8B4, 0x59B33D17, 0x2EB40D81,
+  0xB7BD5C3B, 0xC0BA6CAD, 0xEDB88320, 0x9ABFB3B6, 0x03B6E20C, 0x74B1D29A,
+  0xEAD54739, 0x9DD277AF, 0x04DB2615, 0x73DC1683, 0xE3630B12, 0x94643B84,
+  0x0D6D6A3E, 0x7A6A5AA8, 0xE40ECF0B, 0x9309FF9D, 0x0A00AE27, 0x7D079EB1,
+  0xF00F9344, 0x8708A3D2, 0x1E01F268, 0x6906C2FE, 0xF762575D, 0x806567CB,
+  0x196C3671, 0x6E6B06E7, 0xFED41B76, 0x89D32BE0, 0x10DA7A5A, 0x67DD4ACC,
+  0xF9B9DF6F, 0x8EBEEFF9, 0x17B7BE43, 0x60B08ED5, 0xD6D6A3E8, 0xA1D1937E,
+  0x38D8C2C4, 0x4FDFF252, 0xD1BB67F1, 0xA6BC5767, 0x3FB506DD, 0x48B2364B,
+  0xD80D2BDA, 0xAF0A1B4C, 0x36034AF6, 0x41047A60, 0xDF60EFC3, 0xA867DF55,
+  0x316E8EEF, 0x4669BE79, 0xCB61B38C, 0xBC66831A, 0x256FD2A0, 0x5268E236,
+  0xCC0C7795, 0xBB0B4703, 0x220216B9, 0x5505262F, 0xC5BA3BBE, 0xB2BD0B28,
+  0x2BB45A92, 0x5CB36A04, 0xC2D7FFA7, 0xB5D0CF31, 0x2CD99E8B, 0x5BDEAE1D,
+  0x9B64C2B0, 0xEC63F226, 0x756AA39C, 0x026D930A, 0x9C0906A9, 0xEB0E363F,
+  0x72076785, 0x05005713, 0x95BF4A82, 0xE2B87A14, 0x7BB12BAE, 0x0CB61B38,
+  0x92D28E9B, 0xE5D5BE0D, 0x7CDCEFB7, 0x0BDBDF21, 0x86D3D2D4, 0xF1D4E242,
+  0x68DDB3F8, 0x1FDA836E, 0x81BE16CD, 0xF6B9265B, 0x6FB077E1, 0x18B74777,
+  0x88085AE6, 0xFF0F6A70, 0x66063BCA, 0x11010B5C, 0x8F659EFF, 0xF862AE69,
+  0x616BFFD3, 0x166CCF45, 0xA00AE278, 0xD70DD2EE, 0x4E048354, 0x3903B3C2,
+  0xA7672661, 0xD06016F7, 0x4969474D, 0x3E6E77DB, 0xAED16A4A, 0xD9D65ADC,
+  0x40DF0B66, 0x37D83BF0, 0xA9BCAE53, 0xDEBB9EC5, 0x47B2CF7F, 0x30B5FFE9,
+  0xBDBDF21C, 0xCABAC28A, 0x53B39330, 0x24B4A3A6, 0xBAD03605, 0xCDD70693,
+  0x54DE5729, 0x23D967BF, 0xB3667A2E, 0xC4614AB8, 0x5D681B02, 0x2A6F2B94,
+  0xB40BBE37, 0xC30C8EA1, 0x5A05DF1B, 0x2D02EF8D };
+
+
+static inline void CRC32_update_byte( uint32_t * const crc, const uint8_t byte )
+  { *crc = crc32[(*crc^byte)&0xFF] ^ ( *crc >> 8 ); }
+
+static inline void CRC32_update_buf( uint32_t * const crc,
+                                     const uint8_t * const buffer, const int size )
+  {
+  int i;
+  for( i = 0; i < size; ++i )
+    *crc = crc32[(*crc^buffer[i])&0xFF] ^ ( *crc >> 8 );
+  }
+
+
+static inline int real_bits( unsigned value )
+  {
+  int bits = 0;
+  while( value > 0 ) { value >>= 1; ++bits; }
+  return bits;
+  }
+
+
+static const uint8_t magic_string[4] = { 0x4C, 0x5A, 0x49, 0x50 }; /* "LZIP" */
+
+typedef uint8_t File_header[6];		/* 0-3 magic bytes */
+					/*   4 version */
+					/*   5 coded_dict_size */
+enum { Fh_size = 6 };
+
+static inline void Fh_set_magic( File_header data )
+  { memcpy( data, magic_string, 4 ); data[4] = 1; }
+
+static inline bool Fh_verify_magic( const File_header data )
+  { return ( memcmp( data, magic_string, 4 ) == 0 ); }
+
+static inline uint8_t Fh_version( const File_header data )
+  { return data[4]; }
+
+static inline bool Fh_verify_version( const File_header data )
+  { return ( data[4] <= 1 ); }
+
+static inline unsigned Fh_get_dictionary_size( const File_header data )
+  {
+  unsigned sz = ( 1 << ( data[5] & 0x1F ) );
+  if( sz > min_dictionary_size )
+    sz -= ( sz / 16 ) * ( ( data[5] >> 5 ) & 7 );
+  return sz;
+  }
+
+static inline bool Fh_set_dictionary_size( File_header data, const int sz )
+  {
+  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;
+      int i;
+      for( i = 7; i >= 1; --i )
+        if( base_size - ( i * wedge ) >= sz )
+          { data[5] |= ( i << 5 ); break; }
+      }
+    return true;
+    }
+  return false;
+  }
+
+static inline bool Fh_verify( const File_header data )
+  {
+  return ( Fh_verify_magic( data ) && Fh_verify_version( data ) &&
+           Fh_get_dictionary_size( data ) >= min_dictionary_size &&
+           Fh_get_dictionary_size( data ) <= max_dictionary_size );
+  }
+
+
+typedef uint8_t File_trailer[20];
+			/*  0-3  CRC32 of the uncompressed data */
+			/*  4-11 size of the uncompressed data */
+			/* 12-19 member size including header and trailer */
+
+enum { Ft_size = 20 };
+
+static inline int Ft_versioned_size( const int version )
+  { return ( ( version >= 1 ) ? 20 : 12 ); }
+
+static inline unsigned Ft_get_data_crc( const File_trailer data )
+  {
+  unsigned tmp = 0;
+  int i;
+  for( i = 3; i >= 0; --i ) { tmp <<= 8; tmp += data[i]; }
+  return tmp;
+  }
+
+static inline void Ft_set_data_crc( File_trailer data, unsigned crc )
+  {
+  int i;
+  for( i = 0; i <= 3; ++i ) { data[i] = (uint8_t)crc; crc >>= 8; }
+  }
+
+static inline unsigned long long Ft_get_data_size( const File_trailer data )
+  {
+  unsigned long long tmp = 0;
+  int i;
+  for( i = 11; i >= 4; --i ) { tmp <<= 8; tmp += data[i]; }
+  return tmp;
+  }
+
+static inline void Ft_set_data_size( File_trailer data, unsigned long long sz )
+  {
+  int i;
+  for( i = 4; i <= 11; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
+  }
+
+static inline unsigned long long Ft_get_member_size( const File_trailer data )
+  {
+  unsigned long long tmp = 0;
+  int i;
+  for( i = 19; i >= 12; --i ) { tmp <<= 8; tmp += data[i]; }
+  return tmp;
+  }
+
+static inline void Ft_set_member_size( File_trailer data, unsigned long long sz )
+  {
+  int i;
+  for( i = 12; i <= 19; ++i ) { data[i] = (uint8_t)sz; sz >>= 8; }
+  }