summaryrefslogtreecommitdiffstats
path: root/doc/lzip.texinfo
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--doc/lzip.texinfo34
1 files changed, 17 insertions, 17 deletions
diff --git a/doc/lzip.texinfo b/doc/lzip.texinfo
index 0e8ac92..cfc9138 100644
--- a/doc/lzip.texinfo
+++ b/doc/lzip.texinfo
@@ -6,8 +6,8 @@
@finalout
@c %**end of header
-@set UPDATED 1 August 2013
-@set VERSION 1.15-rc1
+@set UPDATED 20 September 2013
+@set VERSION 1.15
@dircategory Data Compression
@direntry
@@ -84,8 +84,8 @@ recovery capabilities, including error-checked merging of damaged copies
of a file.
Lzip uses the same well-defined exit status values used by bzip2, which
-makes it safer when used in pipes or scripts than compressors returning
-ambiguous warning values, like gzip.
+makes it safer than compressors returning ambiguous warning values (like
+gzip) when it is used as a back end for tar or zutils.
Lzip replaces every file given in the command line with a compressed
version of itself, with the name "original_name.lz". Each compressed
@@ -300,7 +300,7 @@ Use it together with @samp{-v} to see information about the file.
@itemx --verbose
Verbose mode.@*
When compressing, show the compression ratio for each file processed. A
-second -v shows the progress of compression.@*
+second @samp{-v} shows the progress of compression.@*
When decompressing or testing, further -v's (up to 4) increase the
verbosity level, showing status, compression ratio, dictionary size,
trailer contents (CRC, data size, member size), and up to 6 bytes of
@@ -554,9 +554,9 @@ decoded data.
@item literal_state
Value of the 3 most significant bits of the latest byte decoded.
-@item dis_state
-Coded value of length (real length - 2), with a maximum of 3. The
-resulting value is in the range 0 to 3.
+@item len_state
+Coded value of length (length - 2), with a maximum of 3. The resulting
+value is in the range 0 to 3.
@end table
@@ -600,7 +600,7 @@ The contexts for decoding distances are:
@multitable @columnfractions .2 .4 .4
@headitem Name @tab Indices @tab Used when
-@item bm_dis_slot @tab dis_state, bit tree @tab distance start
+@item bm_dis_slot @tab len_state, bit tree @tab distance start
@item bm_dis @tab reverse bit tree @tab after slots 4 to 13
@item bm_align @tab reverse bit tree @tab for distances >= 128, after
fixed probability bits
@@ -765,7 +765,7 @@ lzip -b 32MiB -S 650MB big_db
@node Problems
-@chapter Reporting Bugs
+@chapter Reporting bugs
@cindex bugs
@cindex getting help
@@ -838,6 +838,7 @@ enum {
pos_states = 1 << pos_state_bits,
pos_state_mask = pos_states - 1,
+ len_states = 4,
dis_slot_bits = 6,
start_dis_model = 4,
end_dis_model = 14,
@@ -854,7 +855,6 @@ enum {
max_len_symbols = len_low_symbols + len_mid_symbols + len_high_symbols,
min_match_len = 2, // must be 2
- max_dis_states = 4,
bit_model_move_bits = 5,
bit_model_total_bits = 11,
@@ -1081,7 +1081,7 @@ bool LZ_decoder::decode_member() // Returns false if error
Bit_model bm_rep1[State::states];
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_slot[len_states][1<<dis_slot_bits];
Bit_model bm_dis[modeled_distances-end_dis_model];
Bit_model bm_align[dis_align_size];
Len_model match_len_model;
@@ -1109,9 +1109,9 @@ bool LZ_decoder::decode_member() // Returns false if error
else
{
int len;
- if( rdec.decode_bit( bm_rep[state()] ) == 1 ) // 2nd bit
+ if( rdec.decode_bit( bm_rep[state()] ) != 0 ) // 2nd bit
{
- if( rdec.decode_bit( bm_rep0[state()] ) == 1 ) // 3rd bit
+ if( rdec.decode_bit( bm_rep0[state()] ) != 0 ) // 3rd bit
{
unsigned distance;
if( rdec.decode_bit( bm_rep1[state()] ) == 0 ) // 4th bit
@@ -1132,16 +1132,16 @@ bool LZ_decoder::decode_member() // Returns false if error
if( rdec.decode_bit( bm_len[state()][pos_state] ) == 0 ) // 4th bit
{ state.set_short_rep(); put_byte( get_byte( rep0 ) ); continue; }
}
- len = min_match_len + rdec.decode_len( rep_len_model, pos_state );
state.set_rep();
+ len = min_match_len + rdec.decode_len( rep_len_model, pos_state );
}
else
{
rep3 = rep2; rep2 = rep1; rep1 = rep0;
len = min_match_len + rdec.decode_len( match_len_model, pos_state );
- const int dis_state = std::min( len - min_match_len, max_dis_states - 1 );
+ const int len_state = std::min( len - min_match_len, len_states - 1 );
const int dis_slot =
- rdec.decode_tree( bm_dis_slot[dis_state], dis_slot_bits );
+ rdec.decode_tree( bm_dis_slot[len_state], dis_slot_bits );
if( dis_slot < start_dis_model ) rep0 = dis_slot;
else
{