/*
?*?Copyright?（c）?2000-2008?Apple?Inc.?All?rights?reserved.
?*
?*?@APPLE_OSREFERENCE_LICENSE_HEADER_START@
?*?
?*?This?file?contains?Original?Code?and/or?Modifications?of?Original?Code
?*?as?defined?in?and?that?are?subject?to?the?Apple?Public?Source?License
?*?Version?2.0?（the?‘License‘）.?You?may?not?use?this?file?except?in
?*?compliance?with?the?License.?The?rights?granted?to?you?under?the?License
?*?may?not?be?used?to?create?or?enable?the?creation?or?redistribution?of
?*?unlawful?or?unlicensed?copies?of?an?Apple?operating?system?or?to
?*?circumvent?violate?or?enable?the?circumvention?or?violation?of?any
?*?terms?of?an?Apple?operating?system?software?license?agreement.
?*?
?*?Please?obtain?a?copy?of?the?License?at
?*?http://www.opensource.apple.com/apsl/?and?read?it?before?using?this?file.
?*?
?*?The?Original?Code?and?all?software?distributed?under?the?License?are
?*?distributed?on?an?‘AS?IS‘?basis?WITHOUT?WARRANTY?OF?ANY?KIND?EITHER
?*?EXPRESS?OR?IMPLIED?AND?APPLE?HEREBY?DISCLAIMS?ALL?SUCH?WARRANTIES
?*?INCLUDING?WITHOUT?LIMITATION?ANY?WARRANTIES?OF?MERCHANTABILITY
?*?FITNESS?FOR?A?PARTICULAR?PURPOSE?QUIET?ENJOYMENT?OR?NON-INFRINGEMENT.
?*?Please?see?the?License?for?the?specific?language?governing?rights?and
?*?limitations?under?the?License.
?*?
?*?@APPLE_OSREFERENCE_LICENSE_HEADER_END@
?*/
/*
?*?Copyright?（c）?1980?1986?1989?1993
?*	The?Regents?of?the?University?of?California.??All?rights?reserved.
?*?（c）?UNIX?System?Laboratories?Inc.
?*?All?or?some?portions?of?this?file?are?derived?from?material?licensed
?*?to?the?University?of?California?by?American?Telephone?and?Telegraph
?*?Co.?or?Unix?System?Laboratories?Inc.?and?are?reproduced?herein?with
?*?the?permission?of?UNIX?System?Laboratories?Inc.
?*
?*?Redistribution?and?use?in?source?and?binary?forms?with?or?without
?*?modification?are?permitted?provided?that?the?following?conditions
?*?are?met:
?*?1.?Redistributions?of?source?code?must?retain?the?above?copyright
?*????notice?this?list?of?conditions?and?the?following?disclaimer.
?*?2.?Redistributions?in?binary?form?must?reproduce?the?above?copyright
?*????notice?this?list?of?conditions?and?the?following?disclaimer?in?the
?*????documentation?and/or?other?materials?provided?with?the?distribution.
?*?3.?All?advertising?materials?mentioning?features?or?use?of?this?software
?*????must?display?the?following?acknowledgement:
?*	This?product?includes?software?developed?by?the?University?of
?*	California?Berkeley?and?its?contributors.
?*?4.?Neither?the?name?of?the?University?nor?the?names?of?its?contributors
?*????may?be?used?to?endorse?or?promote?products?derived?from?this?software
?*????without?specific?prior?written?permission.
?*
?*?THIS?SOFTWARE?IS?PROVIDED?BY?THE?REGENTS?AND?CONTRIBUTORS?‘‘AS?IS‘‘?AND
?*?ANY?EXPRESS?OR?IMPLIED?WARRANTIES?INCLUDING?BUT?NOT?LIMITED?TO?THE
?*?IMPLIED?WARRANTIES?OF?MERCHANTABILITY?AND?FITNESS?FOR?A?PARTICULAR?PURPOSE
?*?ARE?DISCLAIMED.??IN?NO?EVENT?SHALL?THE?REGENTS?OR?CONTRIBUTORS?BE?LIABL