void MSAConnection::doRead(void)
{
MSBuffer *hb=headBuffer() ;
MSBuffer *db=readBuffer() ;
int s,n;
if (isSet(MSProtocolConnection<MSA>::Reset)==MSTrue) return;
if((s=hb->put()-hb->get())<4)
{
if((n=readTheBuffer(hb,4-s))<0) return;
if((s=hb->put()-hb->get())<4) return;
_bytesToNextMessage=MSA::longAt(hb->get());
if (_bytesToNextMessage<=0)
{
hb->reset();
unset(MSProtocolConnection<MSA>::Read);
return;
}
}
if((n=readTheBuffer(db,_bytesToNextMessage))<0) return;
if((_bytesToNextMessage-=n)==0)
{
MSA d=MSA::importAObject( (char *) db->get(), db->put()-db->get(), (char *)0);
hb->reset();
db->clear();
unset(MSProtocolConnection<MSA>::Read);
if(d.isNullMSA()==MSTrue){resetWithError(MSProtocolConnection<MSA>::Read);return;}
readNotify(d);
}
return;
}
int MSAConnection::doSyncRead(MSA &result_)
{
MSBuffer *hb=headBuffer();
MSBuffer *db=readBuffer();
int s,n;
if (isSet(MSProtocolConnection<MSA>::Reset)==MSTrue) return 0;
if ((s=hb->put()-hb->get())<4)
{
if ((n=readTheBuffer(hb,4-s))<0) return 0;
if((s=hb->put()-hb->get())<4) return 0;
_bytesToNextMessage=MSA::longAt(hb->get());
}
if((n=readTheBuffer(db,_bytesToNextMessage))<0) return 0;
if((_bytesToNextMessage-=n)==0)
{
result_=MSA::importAObject((char *) db->get(), db->put()-db->get(), (char *)0);
hb->reset();
db->clear();
unset(MSProtocolConnection<MSA>::Read);
if((result_.aStructPtr())==(MSAStruct *)0){resetWithError(MSProtocolConnection<MSA>::Read);return 0;}
}
return 1;
}
A pSimple_Connection::readOne(void)
{
ipcWarn(wrnlvl(),"%t pSimple_Connection::readOne\n");
MSBuffer *hb=headBuffer();
MSBuffer *db=readBuffer();
int slen;
A d,z=(A)0;
if(4>(slen=hb->put()-hb->get()))
{
if(0>readTheBuffer(hb,4-slen)) return (A)0;
if(4>(slen=hb->put()-hb->get())) return (A)0;
slen=longAt(hb->get());
if(0>=slen)
{
static char fmt[]="\343 IPC warning: zero-length simple message. slen=%d [%d]\n";
Warn(fmt, slen,handle());
hb->reset();
turnInReadOff();
return (A)0;
}
d=gv(Ct,slen);
db->minofbuffer((C *)d); db->get(db->minofbuffer());
db->put((C *)(d)); db->maxofbuffer(db->put()+slen);
}
if(0>readTheBuffer(db,db->maxofbuffer()-db->put())) return (A)0;
if(db->put()==db->maxofbuffer())
{
z=(A)db->minofbuffer();
z->c=1;
hb->reset();
db->minofbuffer(0);
db->clear();
return z;
}
return (A)0;
}
void MSRawConnection::doRead(void)
{
int n;
MSBuffer *db=headBuffer();
if (isSet(MSProtocolConnection<MSString>::Reset)==MSTrue) return;
if((n=readTheBuffer(db,MaxReadSize))<0) return;
if((n=db->put()-db->get())>0)
{
unset(MSProtocolConnection<MSString>::Read);
MSString d(db->get(),n);
db->get(db->get()+n);
readNotify(d);
}
}
int MSRawConnection::doSyncRead(MSString &result_)
{
MSBuffer *db=headBuffer();
int n;
if (isSet(MSProtocolConnection<MSString>::Reset)==MSTrue) return 0;
if ((n=readTheBuffer(db,MaxReadSize))<0) return 0;
if((n=db->put()-db->get())>0)
{
unset(MSProtocolConnection<MSString>::Read);
result_=MSString(db->get(),n);
db->get(db->get()+n);
}
return 1;
}
void MSAConnection::doReadBurst(void)
{
int burstLength,n;
if (isSet(MSProtocolConnection<MSA>::Reset)==MSTrue) return;
#ifdef MS_WINSOCK
if (ioctlsocket(fd(),FIONREAD,(unsigned long*)&burstLength) == -1)
#else
if (ioctl(fd(),FIONREAD,(caddr_t)&burstLength) == -1)
#endif
{
resetWithError(MSProtocolConnection<MSA>::Read);
return;
}
if (burstLength<0) {return;}
if (burstLength==0)
{
MSMessageLog::infoMessage("MSAConnection: No data to be read on read event\n");
burstLength=4;
}
MSBuffer b(burstLength);
if (n=readTheBuffer(&b,burstLength)<0)
{
return;
}
if (n==0&&burstLength==0)
{
unset(MSProtocolConnection<MSA>::Read);
return;
}
MSA d(getAobjectFromBuffer(&b));
if (d.isNullMSA()==MSTrue) {return;}
int count=1,s=0;
char *cp;
for(cp=b.get();cp<b.put();cp+=s)
{
s=MSA::longAt(cp);
cp+=sizeof(long);
if(b.put()-cp>=s) ++count;
}
MSA z(MSA::gv(MSA::ETYPE,count));
int i;
for(i=0;i<count;++i) z.aStructPtr()->p[i]=0;
int index=0;
z.aStructPtr()->p[index++]=(long)d.aStructPtr();
while(index<count)
{
d=getAobjectFromBuffer(&b);
if(d.isNullMSA()==MSTrue) break;
z.aStructPtr()->p[index++]=(long)d.aStructPtr();
}
if (index<count)
{
MSMessageLog::warningMessage("MSAConnection: Burst Mode Aborted. Possible Data Loss.\n");
}
if (b.get()==b.put()) unset(MSProtocolConnection<MSA>::Read);
else
{
d=getAobjectFromBuffer(&b);
if (d.isNullMSA()==MSFalse || b.get()!=b.put())
{
MSMessageLog::warningMessage("MSAConnection: Burst Buffer Not Cleared\n");
}
}
readNotify(d);
}
A pString_Connection::readBurst(void)
{
ipcWarn(wrnlvl(),"%t pString_Connection::readBurst\n");
MSBuffer bbuff;
A d,z=(A)0;
I slen=readFileLength(),slen1,n,s,count;
if(-1==slen)R(A)0;
if(0==slen)
{
static char fmt[]="\343 IPC warning: pA::ReadBurst: read event with no data [%d]\n";
Warn(fmt, handle());
}
/* create buff to hold it. Fill buffer */
slen1=slen?slen:4;
bbuff.minofbuffer(mab(slen1));
bbuff.maxofbuffer(bbuff.minofbuffer()+slen1);
bbuff.reset();
if(0>(n=readTheBuffer(&bbuff,slen1))) {mfbuffer(&bbuff); R(A)0;}
if(0==n&&0==slen) {turnInReadOff(); mfbuffer(&bbuff); R(A)0;}
d=getAobjFromBuffer(&bbuff);
if((A)0==d){mfbuffer(&bbuff); R(A)0;}
// determine how many more complete A-objects lie in bbuff
count=1;
for(C *cp=bbuff.get();cp<bbuff.put();cp+=s)
{
s=longAt(cp);
cp+=sizeof(long);
if(s<=bbuff.put()-cp)++count;
}
// create result
z=gv(Et,count);
for(int i=0;i<count;++i)z->p[i]=(I)aplus_nl;
int idx=0;
z->p[idx++]=(I)d;
// retrieve additional A-objects from bbuff, fill in z
while(idx<count)
{
d=getAobjFromBuffer(&bbuff);
if((A)0==d)break;
z->p[idx++]=(I)d;
}
if(idx<count)
{
ipcWarn(wrnlvl(),"%t burst mode aborted. Possible data loss.\n");
}
// run once more to clear out bbuff and move partial object into connection
// buffers
if(bbuff.get()==bbuff.put())turnInReadOff();
else
{
d=getAobjFromBuffer(&bbuff);
if((A)0!=d || bbuff.get()!=bbuff.put())
{
ipcWarn(wrnlvl(),"%t burst buffer not cleared: %d %d %d\n",
d,bbuff.get(),bbuff.put());
}
}
// free bbuff;
mfbuffer(&bbuff);
return z;
}
