/*
?*?fec.c?--?forward?error?correction?based?on?Vandermonde?matrices
?*?980624
?*?（C）?1997-98?Luigi?Rizzo?（luigi@iet.unipi.it）
?*
?*?Portions?derived?from?code?by?Phil?Karn?（karn@ka9q.ampr.org）
?*?Robert?Morelos-Zaragoza?（robert@spectra.eng.hawaii.edu）?and?Hari
?*?Thirumoorthy?（harit@spectra.eng.hawaii.edu）?Aug?1995
?*
?*?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.
?*
?*?THIS?SOFTWARE?IS?PROVIDED?BY?THE?AUTHORS?‘‘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?AUTHORS
?*?BE?LIABLE?FOR?ANY?DIRECT?INDIRECT?INCIDENTAL?SPECIAL?EXEMPLARY
?*?OR?CONSEQUENTIAL?DAMAGES?（INCLUDING?BUT?NOT?LIMITED?TO
?*?PROCUREMENT?OF?SUBSTITUTE?GOODS?OR?SERVICES;?LOSS?OF?USE?DATA
?*?OR?PROFITS;?OR?BUSINESS?INTERRUPTION）?HOWEVER?CAUSED?AND?ON?ANY
?*?THEORY?OF?LIABILITY?WHETHER?IN?CONTRACT?STRICT?LIABILITY?OR
?*?TORT?（INCLUDING?NEGLIGENCE?OR?OTHERWISE）?ARISING?IN?ANY?WAY?OUT
?*?OF?THE?USE?OF?THIS?SOFTWARE?EVEN?IF?ADVISED?OF?THE?POSSIBILITY
?*?OF?SUCH?DAMAGE.
?*/

/*
?*?The?following?parameter?defines?how?many?bits?are?used?for
?*?field?elements.?The?code?supports?any?value?from?2?to?16
?*?but?fastest?operation?is?achieved?with?8?bit?elements
?*?This?is?the?only?parameter?you?may?want?to?change.
?*/
#ifndef?GF_BITS
#define?GF_BITS??8	/*?code?over?GF（2**GF_BITS）?-?change?to?suit?*/
#endif

#include?
#include?
#include?

typedef?unsigned?long?u_long;
/*
?*?compatibility?stuff
?*/
#if?defined（MSDOS）||defined（__MINGW32__）	/*?but?also?for?others?e.g.?sun...?*/
#define?NEED_BCOPY
#define?bcmp（abn）?memcmp（abn）
#endif

#ifdef?NEED_BCOPY
#define?bcopy（s?d?siz）????????memcpy（（d）?（s）?（siz））
#define?bzero（d?siz）???memset（（d）?‘\0‘?（siz））
#endif

/*
?*?stuff?used?for?testing?purposes?only
?*/

#ifdef	TEST
#define?DEB（x）
#define?DDB（x）?x
#define	DEBUG	0	/*?minimal?debugging?*/
#ifdef	MSDOS
#include?
struct?timeval?{
????unsigned?long?ticks;
};
#define?gettimeofday（x?dummy）?{?（x）->ticks?=?clock（）?;?}
#define?DIFF_T（ab）?（1+?1000000*（a.ticks?-?b.ticks）?/?CLOCKS_PER_SEC?）
typedef?unsigned?long?u_long?;
typedef?unsigned?short?u_short?;
#else?/*?typically?unix?systems?*/
#include?
#define?DIFF_T（ab）?\
	（1+?1000000*（a.tv_sec?-?b.tv_sec）?+?（a.tv_usec?-?b.tv_usec）?）
#endif

#define?TICK（t）?\
	{struct?timeval?x?;?\
	gettimeofday（&x?NULL）?;?\
	t?=?x.tv_usec?+?1000000*?（x.tv_sec?&?0xff?）?;?\
	}
#define?TOC

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件???????24903??2019-09-10?11:45??fec.c
?????文件????????2338??2019-09-10?11:45??fec.h
?????文件??????????36??2019-09-10?12:19??git_version.h
?????文件?????????527??2019-09-10?12:10??makefile
?????文件????????1354??2019-09-10?12:16??rs.c
?????文件????????1415??2019-09-10?11:43??rs.h
?????文件?????1040501??2019-09-10?12:19??simple_fec
?????文件?????????594??2019-09-10?12:19??simple_fec.c