/*?pigz.c?--?parallel?implementation?of?gzip
?*?Copyright?（C）?2007?2008?2009?2010?2011?2012?2013?Mark?Adler
?*?Version?2.3.1??9?Oct?2013??Mark?Adler
?*/

/*
??This?software?is?provided?‘a(chǎn)s-is‘?without?any?express?or?implied
??warranty.??In?no?event?will?the?author?be?held?liable?for?any?damages
??arising?from?the?use?of?this?software.

??Permission?is?granted?to?anyone?to?use?this?software?for?any?purpose
??including?commercial?applications?and?to?alter?it?and?redistribute?it
??freely?subject?to?the?following?restrictions:

??1.?The?origin?of?this?software?must?not?be?misrepresented;?you?must?not
?????claim?that?you?wrote?the?original?software.?If?you?use?this?software
?????in?a?product?an?acknowledgment?in?the?product?documentation?would?be
?????appreciated?but?is?not?required.
??2.?Altered?source?versions?must?be?plainly?marked?as?such?and?must?not?be
?????misrepresented?as?being?the?original?software.
??3.?This?notice?may?not?be?removed?or?altered?from?any?source?distribution.

??Mark?Adler
??madler@alumni.caltech.edu

??Mark?accepts?donations?for?providing?this?software.??Donations?are?not
??required?or?expected.??Any?amount?that?you?feel?is?appropriate?would?be
??appreciated.??You?can?use?this?link:

??https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=536055

?*/

/*?Version?history:
???1.0????17?Jan?2007??First?version?pipe?only
???1.1????28?Jan?2007??Avoid?void?*?arithmetic?（some?compilers?don‘t?get?that）
???????????????????????Add?note?about?requiring?zlib?1.2.3
???????????????????????Allow?compression?level?0?（no?compression）
???????????????????????Completely?rewrite?parallelism?--?add?a?write?thread
???????????????????????Use?deflateSetDictionary（）?to?make?use?of?history
???????????????????????Tune?argument?defaults?to?best?performance?on?four?cores
???1.2.1???1?Feb?2007??Add?long?command?line?options?add?all?gzip?options
???????????????????????Add?debugging?options
???1.2.2??19?Feb?2007??Add?list?（--list）?function
???????????????????????Process?file?names?on?command?line?write?.gz?output
???????????????????????Write?name?and?time?in?gzip?header?set?output?file?time
???????????????????????Implement?all?command?line?options?except?--recursive
???????????????????????Add?--keep?option?to?prevent?deleting?input?files
???????????????????????Add?thread?tracing?information?with?-vv?used
???????????????????????Copy?crc32_combine（）?from?zlib?（shared?libraries?issue）
???1.3????25?Feb?2007??Implement?--recursive
???????????????????????Expand?help?to?show?all?options
???????????????????????Show?help?if?no?arguments?or?output?piping?are?provided
???????????????????????Process?options?in?GZIP?environment?variable
???????????????????????Add?progress?indicator?to?write?thread?if?--verbose
???1.4?????4?Mar?2007??Add?--independent?to?facilitate?damaged?file?recovery
???????????????????????Reallocate?jobs?for?new?--blocksize?or?--processes
???????????????????????Do?not?delete?original?if?writing?to?stdout
???????????????