/*
?*?cgifcgi.c?--
?*
?*	CGI?to?FastCGI?bridge
?*
?*
?*?Copyright?（c）?1996?Open?Market?Inc.
?*
?*?See?the?file?“LICENSE.TERMS“?for?information?on?usage?and?redistribution
?*?of?this?file?and?for?a?DISCLAIMER?OF?ALL?WARRANTIES.
?*
?*/
#ifndef?lint
static?const?char?rcsid[]?=?“$Id:?cgi-fcgi.cv?1.15?2001/09/01?01:14:28?robs?Exp?$“;
#endif?/*?not?lint?*/

#include?
#include?
#include?
#include?
#include?
#include?
#include?

#include?“fcgi_config.h“

#ifdef?HAVE_NETDB_H
#include?
#endif

#ifdef?_WIN32
#include?
#include?
#else
extern?char?**environ;
#endif

#ifdef?HAVE_SYS_PARAM_H
#include?
#endif

#ifdef?HAVE_SYS_TIME_H
#include?
#endif

#ifdef?HAVE_UNISTD_H
#include?
#endif

#include?“fcgimisc.h“
#include?“fcgiapp.h“
#include?“fastcgi.h“
#include?“fcgios.h“


static?int?wsReadPending?=?0;
static?int?fcgiReadPending?=?0;
static?int?fcgiWritePending?=?0;

static?void?ScheduleIo（void）;


/*
?*?Simple?buffer?（not?ring?buffer）?type?used?by?all?event?handlers.
?*/
#define?BUFFLEN?8192
typedef?struct?{
????char?*next;
????char?*stop;
????char?buff[BUFFLEN];
}?Buffer;

/*
?*----------------------------------------------------------------------
?*
?*?GetPtr?--
?*
?*??????Returns?a?count?of?the?number?of?characters?available
?*??????in?the?buffer?（at?most?n）?and?advances?past?these
?*??????characters.??Stores?a?pointer?to?the?first?of?these
?*??????characters?in?*ptr.
?*
?*----------------------------------------------------------------------
?*/

static?int?GetPtr（char?**ptr?int?n?Buffer?*pBuf）
{
????int?result;
????*ptr?=?pBuf->next;
????result?=?min（n?pBuf->stop?-?pBuf->next）;
????pBuf->next?+=?result;
????return?result;
}

/*
?*----------------------------------------------------------------------
?*
?*?MakeHeader?--
?*
?*??????Constructs?an?FCGI_Header?struct.
?*
?*----------------------------------------------------------------------
?*/
static?FCGI_Header?MakeHeader（
????????int?type
????????int?requestId
????????int?contentLength
????????int?paddingLength）
{
????FCGI_Header?header;
????ASSERT（contentLength?>=?0?&&?contentLength?<=?FCGI_MAX_LENGTH）;
????ASSERT（paddingLength?>=?0?&&?paddingLength?<=?0xff）;
????header.version?=?FCGI_VERSION_1;
????header.type?????????????=?（unsigned?char）?type;
????header.requestIdB1??????=?（unsigned?char）?（（requestId?????>>?8）?&?0xff）;
????header.requestIdB0??????=?（unsigned?char）?（（requestId?????????）?&?0xff）;
????header.contentLengthB1??=?（unsigned?char）?（（contentLength?>>?8）?&?0xff）;
????header.contentLengthB0??=?（unsigned?char）?（（contentLength?????）?&?0xff）;
????header.paddingLength????=?（unsigned?char）?paddingLength;
????header.reserved?????????=??0;
????return?header;
}

/*
?*----------------------------------------------------------------------
?*
?*?MakeBeginRequestBody?--
?*
?*??????Constructs?an?FCGI_BeginRequestBody?record.
?*
?*-------------------------------------------