V6/usr/source/s2/sort.c
#define L 512
#define N 7
#define C 20
#define MEM (16*2048)
#define NF 10
int ibuf[259];
int obuf[259];
char *file;
char *filep;
int nfiles;
int nlines;
int ntext;
int *lspace;
char *tspace;
int cmp();
int term();
int mflg;
char *outfil;
char tabchar;
int eargc;
char **eargv;
char fold[128] {
0000,0001,0002,0003,0004,0005,0006,0007,
0010,0011,0012,0013,0014,0015,0016,0017,
0020,0021,0022,0023,0024,0025,0026,0027,
0030,0031,0032,0033,0034,0035,0036,0037,
0040,0041,0042,0043,0044,0045,0046,0047,
0050,0051,0052,0053,0054,0055,0056,0057,
0060,0061,0062,0063,0064,0065,0066,0067,
0070,0071,0072,0073,0074,0075,0076,0077,
0100,0101,0102,0103,0104,0105,0106,0107,
0110,0111,0112,0113,0114,0115,0116,0117,
0120,0121,0122,0123,0124,0125,0126,0127,
0130,0131,0132,0133,0134,0134,0136,0137,
0140,0101,0102,0103,0104,0105,0106,0107,
0110,0111,0112,0113,0114,0115,0116,0117,
0120,0121,0122,0123,0124,0125,0126,0127,
0130,0131,0132,0173,0174,0175,0176,0177
};
char nofold[128];
char dict[128] {
1,1,1,1,1,1,1,1,1,0,0,1,1,1,1,1,
1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,1,
1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1,
1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,1
};
char nodict[128] { 1 };
struct field {
char *code;
char *ignore;
int nflg;
int rflg;
int bflg;
char *m[2];
char *n[2];
} fields[NF];
int proto[9] {
&fold,
&nodict,
0,
1,
0,
0,-1,
0,0
};
int nfields;
int error 1;
main(argc, argv)
char **argv;
{
register a, i;
char *arg;
register int *p;
int *q;
for(a=0; a<128; a++)
nofold[a] = a;
nodict[127] = 1;
copyproto();
eargv = argv;
while (--argc > 0) {
if(**++argv == '-') for(arg = *argv;;) {
switch(*++arg) {
case '\0':
if(arg[-1] == '-')
eargv[eargc++] = "-";
break;
case 'm':
mflg++;
continue;
case 'o':
if(--argc > 0)
outfil = *++argv;
continue;
default:
field(++*argv,1);
break;
}
break;
} else if (**argv == '+') {
if(++nfields>=NF) {
mess("Too many keys\n");
exit(1);
}
copyproto();
field(++*argv,0);
} else
eargv[eargc++] = *argv;
}
q = &fields[0];
for(a=1; a<=nfields; a++) {
p = &fields[a];
for(i=0; i<5; i++) /*sensitive to sizeof(proto)*/
if(p[i] != proto[i])
goto next;
for(i=0; i<5; i++)
p[i] = q[i];
next: ;
}
if(eargc == 0)
eargv[eargc++] = "-";
a = MEM;
i = lspace = sbrk(0);
while(brk(a) == -1)
a =- 512;
brk(a =- 512); /* for recursion */
a =- i;
nlines = ((a-L)>>1) & 077777;
nlines =/ 5;
ntext = nlines*8;
tspace = lspace+nlines;
file = "/usr/tmp/stmXaa";
loop:
filep = file;
while(*filep != 'X')
filep++;
for(*filep = 'a';;(*filep)++) {
if(stat(file, lspace) < 0) {
a = creat(file, 0600);
if(a >= 0)
break;
}
if(*filep == 'z') {
if(file[1] != 't') {
file = "/tmp/stmXaa";
goto loop;
}
mess("Cannot locate temp\n");
exit(1);
}
}
close(a);
filep++;
if ((signal(2, 1) & 01) == 0)
signal(2, term);
nfiles = eargc;
if(!mflg) {
ibuf[0] = -1;
sort();
close(0);
}
for(a = mflg?0:eargc; a+N < nfiles; a=+N) {
newfile();
merge(a, a+N);
}
if(a != nfiles) {
oldfile();
merge(a, nfiles);
}
error = 0;
term();
}
sort()
{
register char *cp;
register *lp, c;
int done;
int i;
int f;
done = 0;
i = 0;
do {
cp = tspace;
lp = lspace;
while(lp < lspace+nlines && cp < tspace+ntext) {
*lp++ = cp;
while((*cp++ = c = getc(ibuf)) != '\n') {
if(c >= 0) continue;
cp--;
close(ibuf[0]);
if(i < eargc) {
if((f = setfil(i++)) == 0)
ibuf[0] = 0;
else if(fopen(f, ibuf) < 0)
cant(f);
} else
break;
}
if(c < 0) {
done++;
lp--;
break;
}
}
qsort(lspace, lp-lspace, 2, cmp);
if(done == 0 || nfiles != eargc)
newfile(); else
oldfile();
while(lp > lspace) {
cp = *--lp;
do
putc(*cp, obuf);
while(*cp++ != '\n');
}
fflush(obuf);
close(obuf[0]);
} while(done == 0);
}
struct merg
{
char l[L];
int b[259];
};
merge(a, b)
{
register struct merg *p;
register char *cp;
register i;
struct { int *ip;};
int f;
int j;
p = lspace;
j = 0;
for(i=a; i<b; i++) {
f = setfil(i);
if(f == 0)
p->b[0] = dup(0);
else if(fopen(f, p->b) < 0)
cant(f);
ibuf[j] = p;
if(!rline(p)) j++;
p++;
}
i = j;
qsort(ibuf, i, 2, cmp);
if(i > 0) for(;;) {
cp = ibuf[i-1];
do
putc(*cp, obuf);
while(*cp++ != '\n');
if(rline(ibuf[i-1])) {
i--;
if(i == 0)
break;
}
cp = &ibuf[i];
while (--cp.ip > ibuf && cmp(cp.ip, cp.ip-1) < 0) {
p = *cp.ip;
*cp.ip = *(cp.ip-1);
*(cp.ip-1) = p;
}
}
p = lspace;
for(i=a; i<b; i++) {
close(p->b[0]);
p++;
if(i >= eargc)
close(creat(setfil(i)));
}
fflush(obuf);
close(obuf[0]);
}
rline(mp)
struct merg *mp;
{
register char *cp;
register *bp, c;
bp = mp->b;
cp = mp->l;
do {
c = getc(bp);
if(c < 0)
return(1);
*cp++ = c;
} while(c != '\n');
return(0);
}
newfile()
{
if(fcreat(setfil(nfiles), obuf) < 0) {
mess("Can't create temp\n");
term();
}
nfiles++;
}
char *
setfil(i)
{
if(i < eargc)
if(eargv[i][0] == '-' && eargv[i][1] == '\0')
return(0);
else
return(eargv[i]);
i =- eargc;
filep[0] = i/26 + 'a';
filep[1] = i%26 + 'a';
return(file);
}
oldfile()
{
if(outfil) {
if(fcreat(outfil, obuf) < 0) {
mess("Can't create output\n");
term();
}
} else
obuf[0] = 1;
}
cant(f)
{
mess("Can't open ");
mess(f);
mess("\n");
term();
}
term()
{
register i;
if(nfiles == eargc)
nfiles++;
for(i=eargc; i<nfiles; i++)
unlink(setfil(i));
exit(error);
}
cmp(i, j)
int *i, *j;
{
register char *pa, *pb;
char *code, *ignore;
int a, b;
int k;
char *la, *lb;
register int sa;
int sb;
char *ipa, *ipb, *jpa, *jpb;
struct field *fp;
for(k = nfields>0; k<=nfields; k++) {
fp = &fields[k];
pa = *i;
pb = *j;
if(k) {
la = skip(pa, fp, 1);
pa = skip(pa, fp, 0);
lb = skip(pb, fp, 1);
pb = skip(pb, fp, 0);
} else {
la = -1;
lb = -1;
}
if(fp->nflg) {
while(blank(*pa))
pa++;
while(blank(*pb))
pb++;
sa = sb = fp->rflg;
if(*pa == '-') {
pa++;
sa = -sa;
}
if(*pb == '-') {
pb++;
sb = -sb;
}
if(sa != sb)
sa = 0;
for(ipa = pa; ipa<la&&digit(*ipa); ipa++);
for(ipb = pb; ipb<lb&&digit(*ipb); ipb++);
jpa = ipa;
jpb = ipb;
a = 0;
if(sa) while(ipa > pa && ipb > pb)
if(b = *--ipb - *--ipa)
a = b;
while(ipa > pa)
if(*--ipa != '0')
return(sa ? -sa : sb);
while(ipb > pb)
if(*--ipb != '0')
return(sa ? sa : sb);
if(a) return(a*sa);
if(*(pa=jpa) == '.')
pa++;
if(*(pb=jpb) == '.')
pb++;
while(pa<la && digit(*pa))
if(pb<lb &&digit(*pb)) {
if(a = *pb++ - *pa++)
return(sa ? a*sa : sb);
} else if(*pa++ != '0')
return(sa ? -sa : sb);
while(pb<lb && digit(*pb))
if(*pb++ != '0')
return(sa ? sa : sb);
continue;
}
code = fp->code;
ignore = fp->ignore;
loop:
while(*pa<0 || ignore[*pa])
pa++;
while(*pb<0 || ignore[*pb])
pb++;
if(pa>=la || *pa=='\n')
if(pb<lb && *pb!='\n')
return(fp->rflg);
else continue;
if(pb>=lb || *pb=='\n')
return(-fp->rflg);
if((sa = code[*pb++]-code[*pa++]) == 0)
goto loop;
return(sa*fp->rflg);
}
pa = *i;
pb = *j;
while(*pa != '\n') {
if(*pa == *pb) {
pa++;
pb++;
continue;
}
if(*pb == '\n')
return(-1);
return(*pb - *pa);
}
return(*pb != '\n');
}
skip(pp, fp, j)
struct field *fp;
char *pp;
{
register i;
register char *p;
p = pp;
if( (i=fp->m[j]) < 0)
return(-1);
while(i-- > 0) {
if(tabchar != 0) {
while(*p != tabchar)
if(*p != '\n')
p++;
else goto ret;
p++;
} else {
while(blank(*p))
p++;
while(!blank(*p))
if(*p != '\n')
p++;
else goto ret;
}
}
if(fp->bflg)
while(blank(*p))
p++;
i = fp->n[j];
while(i-- > 0) {
if(*p != '\n')
p++;
else goto ret;
}
ret:
return(p);
}
digit(c)
{
return(c <= '9' && c >= '0');
}
mess(s)
char *s;
{
while(*s)
write(2, s++, 1);
}
copyproto()
{
register int i, *p, *q;
p = proto;
q = &fields[nfields];
for(i=0; i<sizeof(proto)/2; i++)
*q++ = *p++;
}
field(s,k)
char *s;
{
register struct field *p;
p = &fields[nfields];
for(; *s!=0; s++) {
switch(*s) {
case '\0':
return;
case 'a':
p->code = nofold;
break;
case 'b':
p->bflg++;
break;
case 'd':
p->ignore = dict;
break;
case 'n':
p->nflg++;
break;
case 't':
tabchar = *++s;
if(tabchar == 0) s--;
break;
case 'r':
p->rflg = -1;
break;
default:
p->m[k] = number(&s);
if(*s == '.')
s++;
p->n[k] = number(&s);
s--;
}
}
}
number(ppa)
char **ppa;
{
int n;
register char *pa;
pa = *ppa;
n = 0;
while(digit(*pa))
n = n*10 + *pa++ - '0';
*ppa = pa;
return(n);
}
blank(c)
{
if(c==' ' || c=='\t')
return(1);
return(0);
}