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Research V7 development
[unix-history] / usr / src / cmd / troff / n7.c
#include "tdef.h"
extern
#include "d.h"
extern
#include "v.h"
#ifdef NROFF
extern
#include "tw.h"
#endif
#include "s.h"
#ifdef NROFF
#define GETCH gettch
#endif
#ifndef NROFF
#define GETCH getch
#endif
/*
troff7.c
text
*/
extern struct s *frame, *stk;
extern struct s *ejl;
extern int pl;
extern int trap;
extern int flss;
extern int npnflg;
extern int npn;
extern int stop;
extern int nflush;
extern int ejf;
extern int ascii;
extern int donef;
extern int nc;
extern int wch;
extern int dpn;
extern int ndone;
extern int lss;
extern int pto;
extern int pfrom;
extern int print;
extern int nlist[NTRAP];
extern int mlist[NTRAP];
extern int *pnp;
extern int nb;
extern int ic;
extern int icf;
extern int ics;
extern int ne;
extern int ll;
extern int un;
extern int un1;
extern int in;
extern int ls;
extern int spread;
extern int totout;
extern int nwd;
extern int *pendw;
extern int *linep;
extern int line[];
extern int lastl;
extern int ch;
extern int ce;
extern int fi;
extern int nlflg;
extern int pendt;
extern int sps;
extern int adsp;
extern int pendnf;
extern int over;
extern int adrem;
extern int nel;
extern int ad;
extern int ohc;
extern int hyoff;
extern int nhyp;
extern int spflg;
extern int word[];
extern int *wordp;
extern int wne;
extern int chbits;
extern int cwidth;
extern int widthp;
extern int hyf;
extern int xbitf;
extern int vflag;
extern int ul;
extern int cu;
extern int font;
extern int sfont;
extern int it;
extern int itmac;
extern int *hyptr[NHYP];
extern int **hyp;
extern int *wdstart, *wdend;
extern int lnmod;
extern int admod;
extern int nn;
extern int nms;
extern int ndf;
extern int ni;
extern int nform;
extern int lnsize;
extern int po;
extern int ulbit;
extern int *vlist;
extern int nrbits;
extern int nmbits;
extern char trtab[];
extern int xxx;
int brflg;
tbreak(){
register *i, j, pad;
int res;
trap = 0;
if(nb)return;
if((dip == d) && (v.nl == -1)){
newline(1);
return;
}
if(!nc){
setnel();
if(!wch)return;
if(pendw)getword(1);
movword();
}else if(pendw && !brflg){
getword(1);
movword();
}
*linep = dip->nls = 0;
#ifdef NROFF
if(dip == d)horiz(po);
#endif
if(lnmod)donum();
lastl = ne;
if(brflg != 1){
totout = 0;
}else if(ad){
if((lastl = (ll - un)) < ne)lastl = ne;
}
if(admod && ad && (brflg != 2)){
lastl = ne;
adsp = adrem = 0;
#ifdef NROFF
if(admod == 1)un += quant(nel/2,t.Adj);
#endif
#ifndef NROFF
if(admod == 1)un += nel/2;
#endif
else if(admod ==2)un += nel;
}
totout++;
brflg = 0;
if((lastl+un) > dip->maxl)dip->maxl = (lastl+un);
horiz(un);
#ifdef NROFF
if(adrem%t.Adj)res = t.Hor; else res = t.Adj;
#endif
for(i = line;nc > 0;){
if(((j = *i++) & CMASK) == ' '){
pad = 0;
do{
pad += width(j);
nc--;
}while(((j = *i++) & CMASK) == ' ');
i--;
pad += adsp;
--nwd;
if(adrem){
if(adrem < 0){
#ifdef NROFF
pad -= res;
adrem += res;
}else if((totout&01) ||
((adrem/res)>=(nwd))){
pad += res;
adrem -= res;
#endif
#ifndef NROFF
pad--;
adrem++;
}else{
pad++;
adrem--;
#endif
}
}
horiz(pad);
}else{
pchar(j);
nc--;
}
}
if(ic){
if((j = ll - un - lastl + ics) > 0)horiz(j);
pchar(ic);
}
if(icf)icf++;
else ic = 0;
ne = nwd = 0;
un = in;
setnel();
newline(0);
if(dip != d){if(dip->dnl > dip->hnl)dip->hnl = dip->dnl;}
else{if(v.nl > dip->hnl)dip->hnl = v.nl;}
for(j=ls-1; (j >0) && !trap; j--)newline(0);
spread = 0;
}
donum(){
register i, nw;
extern pchar();
nrbits = nmbits;
nw = width('1' | nrbits);
if(nn){
nn--;
goto d1;
}
if(v.ln%ndf){
v.ln++;
d1:
un += nw*(3+nms+ni);
return;
}
i = 0;
if(v.ln<100)i++;
if(v.ln<10)i++;
horiz(nw*(ni+i));
nform = 0;
fnumb(v.ln,pchar);
un += nw*nms;
v.ln++;
}
text(){
register i;
static int spcnt;
nflush++;
if((dip == d) && (v.nl == -1)){newline(1); return;}
setnel();
if(ce || !fi){
nofill();
return;
}
if(pendw)goto t4;
if(pendt)if(spcnt)goto t2; else goto t3;
pendt++;
if(spcnt)goto t2;
while(((i = GETCH()) & CMASK) == ' ')spcnt++;
if(nlflg){
t1:
nflush = pendt = ch = spcnt = 0;
callsp();
return;
}
ch = i;
if(spcnt){
t2:
tbreak();
if(nc || wch)goto rtn;
un += spcnt*sps;
spcnt = 0;
setnel();
if(trap)goto rtn;
if(nlflg)goto t1;
}
t3:
if(spread)goto t5;
if(pendw || !wch)
t4:
if(getword(0))goto t6;
if(!movword())goto t3;
t5:
if(nlflg)pendt = 0;
adsp = adrem = 0;
if(ad){
/* jfr */ if (nwd==1) adsp=nel; else adsp=nel/(nwd-1);
#ifdef NROFF
adsp = (adsp/t.Adj)*t.Adj;
#endif
adrem = nel - adsp*(nwd-1);
}
brflg = 1;
tbreak();
spread = 0;
if(!trap)goto t3;
if(!nlflg)goto rtn;
t6:
pendt = 0;
ckul();
rtn:
nflush = 0;
}
nofill(){
register i, j;
if(!pendnf){
over = 0;
tbreak();
if(trap)goto rtn;
if(nlflg){
ch = nflush = 0;
callsp();
return;
}
adsp = adrem = 0;
nwd = 10000;
}
while((j = ((i = GETCH()) & CMASK)) != '\n'){
if(j == ohc)continue;
if(j == CONT){
pendnf++;
nflush = 0;
flushi();
ckul();
return;
}
storeline(i,-1);
}
if(ce){
ce--;
if((i=quant(nel/2,HOR)) > 0)un += i;
}
if(!nc)storeline(FILLER,0);
brflg = 2;
tbreak();
ckul();
rtn:
pendnf = nflush = 0;
}
callsp(){
register i;
if(flss)i = flss; else i = lss;
flss = 0;
casesp(i);
}
ckul(){
if(ul && (--ul == 0)){
cu = 0;
font = sfont;
mchbits();
}
if(it && (--it == 0) && itmac)control(itmac,0);
}
storeline(c,w){
register i;
if((c & CMASK) == JREG){
if((i=findr(c>>BYTE)) != -1)vlist[i] = ne;
return;
}
if(linep >= (line + lnsize - 1)){
if(!over){
prstrfl("Line overflow.\n");
over++;
c = 0343;
w = -1;
goto s1;
}
return;
}
s1:
if(w == -1)w = width(c);
ne += w;
nel -= w;
/*
* if( cu && !(c & MOT) && (trtab[(c & CMASK)] == ' '))
* c = ((c & ~ulbit) & ~CMASK) | '_';
*/
*linep++ = c;
nc++;
}
newline(a)
int a;
{
register i, j, nlss;
int opn;
if(a)goto nl1;
if(dip != d){
j = lss;
pchar1(FLSS);
if(flss)lss = flss;
i = lss + dip->blss;
dip->dnl += i;
pchar1(i);
pchar1('\n');
lss = j;
dip->blss = flss = 0;
if(dip->alss){
pchar1(FLSS);
pchar1(dip->alss);
pchar1('\n');
dip->dnl += dip->alss;
dip->alss = 0;
}
if(dip->ditrap && !dip->ditf &&
(dip->dnl >= dip->ditrap) && dip->dimac)
if(control(dip->dimac,0)){trap++; dip->ditf++;}
return;
}
j = lss;
if(flss)lss = flss;
nlss = dip->alss + dip->blss + lss;
v.nl += nlss;
#ifndef NROFF
if(ascii){dip->alss = dip->blss = 0;}
#endif
pchar1('\n');
flss = 0;
lss = j;
if(v.nl < pl)goto nl2;
nl1:
ejf = dip->hnl = v.nl = 0;
ejl = frame;
if(donef){
if((!nc && !wch) || ndone)done1(0);
ndone++;
donef = 0;
if(frame == stk)nflush++;
}
opn = v.pn;
v.pn++;
if(npnflg){
v.pn = npn;
npn = npnflg = 0;
}
nlpn:
if(v.pn == pfrom){
print++;
pfrom = -1;
}else if(opn == pto){
print = 0;
opn = -1;
chkpn();
goto nlpn;
}
if(stop && print){
dpn++;
if(dpn >= stop){
dpn = 0;
dostop();
}
}
nl2:
trap = 0;
if(v.nl == 0){
if((j = findn(0)) != NTRAP)
trap = control(mlist[j],0);
} else if((i = findt(v.nl-nlss)) <= nlss){
if((j = findn1(v.nl-nlss+i)) == NTRAP){
prstrfl("Trap botch.\n");
done2(-5);
}
trap = control(mlist[j],0);
}
}
findn1(a)
int a;
{
register i, j;
for(i=0; i<NTRAP; i++){
if(mlist[i]){
if((j = nlist[i]) < 0)j += pl;
if(j == a)break;
}
}
return(i);
}
chkpn(){
pto = *(pnp++);
pfrom = pto & ~MOT;
if(pto == -1){
flusho();
done1(0);
}
if(pto & MOT){
pto &= ~MOT;
print++;
pfrom = 0;
}
}
findt(a)
int a;
{
register i, j, k;
k = 32767;
if(dip != d){
if(dip->dimac && ((i = dip->ditrap -a) > 0))k = i;
return(k);
}
for(i=0; i<NTRAP; i++){
if(mlist[i]){
if((j = nlist[i]) < 0)j += pl;
if((j -= a) <= 0)continue;
if(j < k)k = j;
}
}
i = pl - a;
if(k > i)k = i;
return(k);
}
findt1(){
register i;
if(dip != d)i = dip->dnl;
else i = v.nl;
return(findt(i));
}
eject(a)
struct s *a;
{
register savlss;
if(dip != d)return;
ejf++;
if(a)ejl = a;
else ejl = frame;
if(trap)return;
e1:
savlss = lss;
lss = findt(v.nl);
newline(0);
lss = savlss;
if(v.nl && !trap)goto e1;
}
movword(){
register i, w, *wp;
int savwch, hys;
over = 0;
wp = wordp;
if(!nwd){
while(((i = *wp++) & CMASK) == ' '){
wch--;
wne -= width(i);
}
wp--;
}
if((wne > nel) &&
!hyoff && hyf &&
(!nwd || (nel > 3*sps)) &&
(!(hyf & 02) || (findt1() > lss))
)hyphen(wp);
savwch = wch;
hyp = hyptr;
nhyp = 0;
while(*hyp && (*hyp <= wp))hyp++;
while(wch){
if((hyoff != 1) && (*hyp == wp)){
hyp++;
if(!wdstart ||
((wp > (wdstart+1)) &&
(wp < wdend) &&
(!(hyf & 04) || (wp < (wdend-1))) &&
(!(hyf & 010) || (wp > (wdstart+2)))
)
){
nhyp++;
storeline(IMP,0);
}
}
i = *wp++;
w = width(i);
wne -= w;
wch--;
storeline(i,w);
}
if(nel >= 0){
nwd++;
return(0);
}
xbitf = 1;
hys = width(0200); /*hyphen*/
m1:
if(!nhyp){
if(!nwd)goto m3;
if(wch == savwch)goto m4;
}
if(*--linep != IMP)goto m5;
if(!(--nhyp))
if(!nwd)goto m2;
if(nel < hys){
nc--;
goto m1;
}
m2:
if(((i = *(linep-1) & CMASK) != '-') &&
(i != 0203)
){
*linep = (*(linep-1) & ~CMASK) | 0200;
w = width(*linep);
nel -= w;
ne += w;
linep++;
/*
hsend();
*/
}
m3:
nwd++;
m4:
wordp = wp;
return(1);
m5:
nc--;
w = width(*linep);
ne -= w;
nel += w;
wne += w;
wch++;
wp--;
goto m1;
}
horiz(i)
int i;
{
vflag = 0;
if(i)pchar(makem(i));
}
setnel(){
if(!nc){
linep = line;
if(un1 >= 0){
un = un1;
un1 = -1;
}
nel = ll - un;
ne = adsp = adrem = 0;
}
}
getword(x)
int x;
{
register i, j, swp;
int noword;
noword = 0;
if(x)if(pendw){
*pendw = 0;
goto rtn;
}
if(wordp = pendw)goto g1;
hyp = hyptr;
wordp = word;
over = wne = wch = 0;
hyoff = 0;
while(1){
j = (i = GETCH()) & CMASK;
if(j == '\n'){
wne = wch = 0;
noword = 1;
goto rtn;
}
if(j == ohc){
hyoff = 1;
continue;
}
if(j == ' '){
storeword(i,cwidth);
continue;
}
break;
}
swp = widthp;
storeword(' ' | chbits, -1);
if(spflg){
storeword(' ' | chbits, -1);
spflg = 0;
}
widthp = swp;
g0:
if(j == CONT){
pendw = wordp;
nflush = 0;
flushi();
return(1);
}
if(hyoff != 1){
if(j == ohc){
hyoff = 2;
*hyp++ = wordp;
if(hyp > (hyptr+NHYP-1))hyp = hyptr+NHYP-1;
goto g1;
}
if((j == '-') ||
(j == 0203) /*3/4 Em dash*/
)if(wordp > word+1){
hyoff = 2;
*hyp++ = wordp + 1;
if(hyp > (hyptr+NHYP-1))hyp = hyptr+NHYP-1;
}
}
storeword(i,cwidth);
g1:
j = (i = GETCH()) & CMASK;
if(j != ' '){
if(j != '\n')goto g0;
j = *(wordp-1) & CMASK;
if((j == '.') ||
(j == '!') ||
(j == '?'))spflg++;
}
*wordp = 0;
rtn:
wdstart = 0;
wordp = word;
pendw = 0;
*hyp++ = 0;
setnel();
return(noword);
}
storeword(c,w)
int c, w;
{
if(wordp >= &word[WDSIZE - 1]){
if(!over){
prstrfl("Word overflow.\n");
over++;
c = 0343;
w = -1;
goto s1;
}
return;
}
s1:
if(w == -1)w = width(c);
wne += w;
*wordp++ = c;
wch++;
}
#ifdef NROFF
extern char trtab[];
gettch(){
register int i, j;
if(!((i = getch()) & MOT) && (i & ulbit)){
j = i&CMASK;
if(cu && (trtab[j] == ' '))
i = ((i & ~ulbit)& ~CMASK) | '_';
if(!cu && (j>32) && (j<0370) && !(*t.codetab[j-32] & 0200))
i &= ~ulbit;
}
return(i);
}
#endif
Continuous source code history from original PDP-7 UNIX to FreeBSD 2, the first fully unencumbered FreeBSD release.