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b6x.c
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b6x.c
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LONGX b5_hit(irec,nord,buffup) /*
-----------
abenda se vrecp nao inicializado;
abenda se registro irec nao alocado;
abenda se registro irec invalido;
retorna total de hits se nord = 0;
se nord > total de hits
zera hit e mfn correntes e retorna -1;
mantem controles para chamadas subsequentes;
retorna o mfn correspondente ao hit nord
(retorna -2 .. -n se algum erro)
*/
LONGX irec; /* indice de vrecp, para info/store */
LONGX nord; /* numero de ordem do hit a analisar */
char *buffup; /* area addr for fldupdat */
{
RECSTRU *recp;
LONGX hits,hcur,hsiz,hmfn;
int xdir_hits,xdir_hcur,xdir_hsiz,xdir_hmfn,xdir_hmem;
unsigned char *p;
LONGX offset,mfn;
LONGX loop;
int loop2,n,delta8,delta1;
#if CHKFOUND
int found;
#endif
#if HITTRACE
printf("b6_hit - irec,nord: %"_LD_"%"_LD_" \n",irec,nord);
#endif
#if SHOWCORE
if (b60trace) showcore("b6_hit");
#endif
strcpy(b62errxy,"b6_hit"); /* b6_hiterr() */
if (!nrecs)
#if CDROM
return(-2L);
#else
fatal("b6_hit/nrecs");
#endif
recp=vrecp[irec];
if (!recp)
#if CDROM
return(-3L);
#else
fatal("b6_hit/irec");
#endif
if (RECtype != TYPEMFQ || RECrc != RCNORMAL)
#if CDROM
return(-4L);
#else
fatal("b6_hit/check");
#endif
if ((xdir_hits=fieldx(irec,MFQTHITS,1)) < 0)
#if CDROM
return(-5L);
#else
fatal("b6_hit/xdir_hits");
#endif
for (hits=0, p=FIELDP(xdir_hits), loop=DIRlen(xdir_hits); loop--; p++)
hits = hits * 10 + (*p - '0');
if (nord < 0 || nord > (hits+1))
#if CDROM
return(-6L);
#else
fatal("b6_hit/nord");
#endif
if ((xdir_hcur=fieldx(irec,MFQTHCUR,1)) < 0)
#if CDROM
return(-7L);
#else
fatal("b6_hit/xdir_hcur");
#endif
if ((xdir_hmfn=fieldx(irec,MFQTHMFN,1)) < 0)
#if CDROM
return(-8L);
#else
fatal("b6_hit/xdir_hmfn");
#endif
if ((xdir_hsiz=fieldx(irec,MFQTHSIZ,1)) < 0)
#if CDROM
return(-9L);
#else
fatal("b6_hit/xdir_hsiz");
#endif
if (nord == 0 || nord > hits) {
hcur=hmfn=0;
if (nord == 0)
mfn=hits; /* returning value */
else
mfn=(-1L);
}
else {
for (hcur=0, p=FIELDP(xdir_hcur), loop=DIRlen(xdir_hcur); loop--; p++)
hcur = hcur * 10 + (*p - '0');
for (hmfn=0, p=FIELDP(xdir_hmfn), loop=DIRlen(xdir_hmfn); loop--; p++)
hmfn = hmfn * 10 + (*p - '0');
for (hsiz=0, p=FIELDP(xdir_hsiz), loop=DIRlen(xdir_hsiz); loop--; p++)
hsiz = hsiz * 10 + (*p - '0');
#if HITTRACx
printf("b6_hit - rec - hits=%"_LD_" hcur=%"_LD_" hsiz=%"_LD_" hmfn=%"_LD_"\n",
hits,hcur,hsiz,hmfn);
#endif
if (hcur == nord)
mfn=hmfn;
else {
if ((xdir_hmem=fieldx(irec,MFQTHMEM,1)) < 0)
#if CDROM
return(-10L);
#else
fatal("b6_hit/xdir_hmen");
#endif
if (nord > hcur) {
#if UNIX
delta8 = 8; delta1 = 1;
#else
delta8 = +8; delta1 = +1;
#endif
}
else {
delta8 = -8; delta1 = -1;
}
#if CDUSP
mfn = (hcur == 0) ? 0 : hmfn+delta1;
#else
mfn = (hmfn == 0) ? 0 : hmfn+delta1;
#endif
offset=(mfn/8);
for (p=FIELDP(xdir_hmem)+offset; hcur != nord; ) {
loop=(nord > hcur) ? hsiz-(mfn/8) : (mfn/8);
#if CHKFOUND
found=0;
#endif
#if HITTRACx
printf("b6_hit - hcur=%"_LD_" nord=%"_LD_" mfn=%"_LD_" *p=%02x loop=%"_LD_" - hmfn=%"_LD_"\n",
hcur,nord,mfn,*p,loop,hmfn);
#endif
do {
if (!*p) {
p+=delta1; mfn+=delta8;
#if HITTRACx
printf("b6_hit - hcur=%"_LD_" nord=%"_LD_" mfn=%"_LD_" *p=%02x loop=%"_LD_" - continue\n",
hcur,nord,mfn,*p,loop);
#endif
continue;
}
if (nord > hcur)
loop2 = 8 - (mfn&BY8RMASK);
else
loop2 = (mfn&BY8RMASK) + 1;
for (; loop2--; mfn+=delta1) {
n=mfn&BY8RMASK;
#if HITTRACx
printf("b6_hit - hcur=%"_LD_" nord=%"_LD_" mfn=%"_LD_" *p=%02x loop=%"_LD_" loop2=%d n=%d\n",
hcur,nord,mfn,*p,loop,loop2,n);
#endif
if (*p & bitmask[n]) {
#if CHKFOUND
found=1;
#endif
hmfn=mfn; hcur+=delta1;
if (nord == hcur)
break;
}
}
#if CHKFOUND
if (found) {
#endif
if (nord > hcur) {
if (n == BY8RMASK)
p++;
}
else
if (n == 0)
p--;
break;
#if CHKFOUND
}
else
fatal("b6_hit/bug1");
#endif
} while (--loop > 0);
#if CHKFOUND
if (!found)
fatal("b6_hit/bug2");
#endif
} /* end for hcur != nord */
} /* end else hcur == nord */
} /* end else nord == 0 || nord > hits */
/* store */
sprintf(buffup,B5EDIT1,hcur);
memmove(FIELDP(xdir_hcur),buffup,B5UPLEN);
sprintf(buffup,B5EDIT1,hmfn);
memmove(FIELDP(xdir_hmfn),buffup,B5UPLEN);
#if HITTRACE
printf("b6_hit - mfn: %"_LD_"\n",mfn);
#endif
#if SHOWCORE
if (b60trace) showcore("b6_hit - exit");
#endif
return(mfn);
}
LONGX b6_hsizh(irxp, nbytes, hsizp)
char *irxp;
LONGX nbytes;
LONGX *hsizp;
{
LONGX hits,hsiz,loop,mfn;
unsigned char *p1p;
int loop2;
hits=0; hsiz=0;
for (mfn=0, p1p=irxp, loop=nbytes; loop--; p1p++) {
if (!*p1p) {
mfn+=8;
continue;
}
for (loop2=8; loop2--; mfn++)
if (*p1p & bitmask[mfn&BY8RMASK]) {
hits++;
hsiz=mfn;
#if MFNTRACE
printf("%"_LD_" ",mfn);
#endif
}
}
#if MFNTRACE
printf("\n");
#endif
*hsizp = hsiz;
return(hits);
}
#else /* BIGREC */
#endif /* BIGREC */