Change way stream blocks are computed to maximize compression.

* Add Dictionary Size computation and setting capability.
* Remove 7/9 scaling for lzma levels. Default still 5.
* LZMA levels now 1-9.
* Improve info displays.
* Assembler will now select either nasm or yasm.
* ETA will be displayed after each chunk is processed.
* Decompression status updated every 5 seconds or so.
* Documentation updates.
* Code cleanups (whitespace removal, comment alignment).

man/lrzip.1

@@ -1,4 +1,4 @@
-.TH "lrzip" "1" "June 2016" "" ""
+.TH "lrzip" "1" "December 2019" "" ""
 .SH "NAME"
 lrzip \- a large-file compression program
 .SH "SYNOPSIS"
@@ -55,13 +55,15 @@ Options affecting output:
  \-O, \-\-outdir directory  specify the output directory when -o is not used
  \-S, \-\-suffix suffix     specify compressed suffix (default '.lrz')
 Options affecting compression:
+ \-\-lzma                  lzma compression (default)
  \-b, \-\-bzip2             bzip2 compression
  \-g, \-\-gzip              gzip compression using zlib
  \-l, \-\-lzo               lzo compression (ultra fast)
  \-n, \-\-no-compress       no backend compression - prepare for other compressor
  \-z, \-\-zpaq              zpaq compression (best, extreme compression, extremely slow)
 Low level options:
- \-L, \-\-level level       set lzma/bzip2/gzip compression level (1-9, default 7)
+ \-L, \-\-level level       Set lzma/bzip2/gzip compression level (1-9, default 7)
+ \-\-dictsize = ds         Set Dictionary Size for LZMA ds=12 to 30 expressed as 2^ds
  \-N, \-\-nice-level value  Set nice value to value (default 19)
  \-p, \-\-threads value     Set processor count to override number of threads
  \-m, \-\-maxram size       Set maximum available ram in hundreds of MB
@@ -227,6 +229,11 @@ Set the compression level from 1 to 9. The default is to use level 7, which
 gives good all round compression. The compression level is also strongly related
 to how much memory lrzip uses. See the \-w option for details.
 .IP
+.IP "\fB--dictsize=12\&.\&.30\fP"
+Set Dictionary Size for LZMA from 2^12 (16KB) to 2^30 (1GB). Normally this
+option is not useful since lrzip will set and sometimes change the dictionary
+size depending on the compression level selected and usable ram available.
+.IP
 .IP "\fB-N value\fP"
 The default nice value is 19. This option can be used to set the priority
 scheduling for the lrzip backup or decompression. Valid nice values are

man/lrzip.conf.5

@@ -21,55 +21,62 @@ Parameter values are not case sensitive except where specified\&.
 .PP
 .SH "CONFIG FILE EXAMPLE"
 .nf
-# This is a comment.
-
+# lrzip.conf example file
 # Compression Window size in 100MB. Normally selected by program. (-w)
-# WINDOW = 20
+# \fBWINDOW = 20\fP
+
 # Compression Level 1-9 (7 Default). (-L)
-# COMPRESSIONLEVEL = 7
+# \fBCOMPRESSIONLEVEL = 7\fP
+
 # Use -U setting, Unlimited ram. Yes or No
-# UNLIMITED = NO
+# \fBUNLIMITED = NO\fP
+
 # Compression Method, rzip, gzip, bzip2, lzo, or lzma (default), or zpaq. (-n -g -b -l --lzma -z)
-# If specified here, command line options not usable.
-# COMPRESSIONMETHOD = lzma
+# May be overriden by command line compression choice.
+# \fBCOMPRESSIONMETHOD = lzma\fP
+
+# LZMA Dictionary Size. 0 = default value used. 12-30 = 2^ds will be used.
+# \fBDICTIONARYSIZE = 0\fP
+
 # Perform LZO Test. Default = YES (-T )
-# LZOTEST = NO
+# \fBLZOTEST = NO\fP
+
 # Hash Check on decompression, (-c)
-# HASHCHECK = YES
+# \fBHASHCHECK = YES\fP
+
 # Show HASH value on Compression even if Verbose is off, YES (-H)
-# SHOWHASH = YES
+# \fBSHOWHASH = YES\fP
 
 # Default output directory (-O)
-# OUTPUTDIRECTORY = location
+# \fBOUTPUTDIRECTORY = location\fP
+
 # Verbosity, YES or MAX (v, vv)
-# VERBOSITY = max
+# \fBVERBOSITY = max\fP
+
 # Show Progress as file is parsed, YES or no (NO = -q option)
-# SHOWPROGRESS = YES
+# \fBSHOWPROGRESS = YES\fP
 
 # Set Niceness. 19 is default. -20 to 19 is the allowable range (-N)
-# NICE = 19
+# \fBNICE = 19\fP
 
 # Keep broken or damaged output files, YES (-K)
-# KEEPBROKEN = YES
+# \fBKEEPBROKEN = YES\fP
 
 # Delete source file after compression (-D)
 # this parameter and value are case sensitive
 # value must be YES to activate
-
-# DELETEFILES = NO
+# \fBDELETEFILES = NO\fP
 
 # Replace existing lrzip file when compressing (-f)
 # this parameter and value are case sensitive
 # value must be YES to activate
-
-# REPLACEFILE = YES 
+# \fBREPLACEFILE = YES\fP
 
 # Override for Temporary Directory. Only valid when stdin/out or Test is used
-# TMPDIR = /tmp
+# \fBTMPDIR = /tmp\fP
 
 # Whether to use encryption on compression YES, NO (-e)
-# ENCRYPT = NO
-
+# \fBENCRYPT = NO\fP
 .fi
 .PP
 .SH "NOTES"