module rcref; % Cross reference program.
% Author: Martin L. Griss.
create!-package('(rcref redio),'(util));
fluid '(!*backtrace !*cref !*defn !*mode calls!* curfun!* dfprint!*
globs!* locls!* toplv!*);
global '(undefg!* gseen!* btime!* expand!* haveargs!* notuse!* nolist!*
dclglb!* entpts!* undefns!* seen!* tseen!* op!*!* cloc!*
pfiles!* curlin!* pretitl!* !*creftime !*saveprops maxarg!*
!*crefsummary !*comp !*raise !*rlisp !*globals !*algebraics);
switch cref;
!*algebraics:='t; % Default is normal parse of algebraic.
!*globals:='t; % Do analyze globals.
% !*rlisp:=nil; % REDUCE as default.
maxarg!*:=15; % Maximum args in Standard Lisp.
% Requires REDIO and SORT support.
deflist('((anlfn procstat) (crflapo procstat)),'stat);
flag('(anlfn crflapo),'compile);
Comment EXPAND flag on these forces expansion of MACROS;
expand!* := '(for foreach repeat while);
nolist!* := nconc(deflist(slfns!*,'number!-of!-args),nolist!*)$
nolist!* := append('(and cond endmodule lambda list max min module or
plus prog prog2 progn putc switch times),
nolist!*);
flag ('(plus times and or lambda progn max min cond prog case list),
'naryargs);
dclglb!*:='(!*comp emsg!* !*raise);
if not getd 'begin then
flag('(rds deflist flag fluid global remprop remflag unfluid
setq crefoff),'eval);
symbolic procedure crefon;
begin scalar a,ocrfil,crfil;
btime!*:=time();
dfprint!* := 'refprint;
!*defn := t;
if not !*algebraics then put('algebraic,'newnam,'symbolic);
flag(nolist!*,'nolist);
flag(expand!*,'expand);
flag(dclglb!*,'dclglb);
% Global lists.
entpts!*:=nil; % Entry points to package.
undefns!*:=nil; % Functions undefined in package.
seen!*:=nil; % List of all encountered functions.
tseen!*:=nil; % List of all encountered types not flagged
% FUNCTION.
gseen!*:=nil; % All encountered globals.
pfiles!*:=nil; % Processed files.
undefg!*:=nil; % Undeclared globals encountered.
curlin!*:=nil; % Position in file(s) of current command.
pretitl!*:=nil; % T if error or questionables found.
% Usages in specific function under analysis.
globs!*:=nil; % Globals refered to in this.
calls!*:=nil; % Functions called by this.
locls!*:=nil; % Defined local variables in this.
toplv!*:=t; % NIL if inside function body.
curfun!*:=nil; % Current function beeing analyzed.
op!*!*:=nil; % Current op. in LAP code.
setpage(" Errors or questionables",nil);
if getd 'begin then return nil; % In REDUCE;
% The following loop is used when running in bare LISP.
ndf: if not (a eq !$eof!$) then go lop;
crfil:=nil;
if null ocrfil then go lop;
crfil:=caar ocrfil;
rds cdar ocrfil;
ocrfil:=cdr ocrfil;
lop: a:=errorset!*('(!%nexttyi),t);
if atom a then go ndf;
cloc!*:=if crfil then crfil . pgline() else nil;
a:=errorset!*('(read),t);
if atom a then go ndf;
a:=car a;
if not pairp a then go lop;
if car a eq 'dskin then
<<ocrfil:=(crfil.rds open(cdr a,'input)).ocrfil;
crfil:=cdr a; go lop>>;
errorset!*(list('refprint,mkquote a),t);
if flagp(car a,'eval) and
(car a neq 'setq or caddr a memq '(t nil) or
constantp caddr a or eqcar(caddr a,'quote))
then errorset!*(a,t);
if !*defn then go lop
end;
symbolic procedure undefdchk fn;
if not flagp(fn,'defd) then undefns!* := fn . undefns!*;
symbolic procedure princng u;
princn getes u;
symbolic procedure crefoff;
% Main call, sets up, alphabetizes and prints.
begin scalar tim,x;
dfprint!* := nil;
!*defn:=nil;
if not !*algebraics
then remprop('algebraic,'newnam); % Back to normal.
tim:=time()-btime!*;
for each fn in seen!* do
<<if null get(fn,'calledby) then entpts!*:=fn . entpts!*;
undefdchk fn>>;
tseen!*:=for each z in idsort tseen!* collect
<<remprop(z,'tseen);
for each fn in (x:=get(z,'funs)) do
<<undefdchk fn; remprop(fn,'rccnam)>>;
z.x>>;
for each z in gseen!* do
if get(z,'usedunby) then undefg!*:=z . undefg!*;
setpage(" Summary",nil);
newpage();
pfiles!*:=punused("Crossreference listing for files:",
for each z in pfiles!* collect cdr z);
entpts!*:=punused("Entry Points:",entpts!*);
undefns!*:=punused("Undefined Functions:",undefns!*);
undefg!*:=punused("Undeclared Global Variables:",undefg!*);
gseen!*:=punused("Global variables:",gseen!*);
seen!*:=punused("Functions:",seen!*);
for each z in tseen!* do
<<rplacd(z,punused(list(car z," procedures:"),cdr z));
x:='!( . nconc(explode car z,list '!));
for each fn in cdr z do
<<fn:=getes fn; rplacd(fn,append(x,cdr fn));
rplaca(fn,length cdr fn)>> >>;
if !*crefsummary then goto xy;
if !*globals and gseen!* then
<<setpage(" Global Variable Usage",1);
newpage();
for each z in gseen!* do cref6 z>>;
if seen!* then cref52(" Function Usage",seen!*);
for each z in tseen!* do
cref52(list(" ",car z," procedures"),cdr z);
setpage(" Toplevel calls:",nil);
x:=t;
for each z in pfiles!* do
if get(z,'calls) or get(z,'globs) then
<<if x then <<newpage(); x:=nil>>;
newline 0; newline 0; princng z;
spaces!-to 15; underline2 (linelength(nil)-10);
cref51(z,'calls,"Calls:");
if !*globals then cref51(z,'globs,"Globals:")>>;
xy: if !*saveprops then goto xx;
rempropss(seen!*,'(gall calls globs calledby alsois sameas));
remflagss(seen!*,'(seen cinthis defd));
rempropss(gseen!*,'(usedby usedunby boundby setby));
remflagss(gseen!*,'(dclglb gseen glb2rf glb2bd glb2st));
for each z in tseen!* do remprop(car z,'funs);
% for each z in haveargs!* do remprop(z,'number!-of!-args);
haveargs!* := gseen!* := seen!* := tseen!* := nil;
xx: newline 2;
if not !*creftime then return;
btime!*:=time()-btime!*;
setpage(" Timing Information",nil);
newpage(); newline 0;
prtatm " Total Time="; prtnum btime!*;
prtatm " (ms)";
newline 0;
prtatm " Analysis Time="; prtnum tim;
newline 0;
prtatm " Sorting Time="; prtnum (btime!*-tim);
newline 0; newline 0
end;
symbolic procedure punused(x,y);
if y then
<<newline 2; prtlst x; newline 0;
lprint(y := idsort y,8); newline 0; y>>;
symbolic procedure cref52(x,y);
<<setpage(x,1); newpage(); for each z in y do cref5 z>>;
symbolic procedure cref5 fn;
% Print single entry.
begin scalar x,y;
newline 0; newline 0;
prin1 fn; spaces!-to 15;
y:=get(fn,'gall);
if y then <<prin1 cdr y; x:=car y>>
else prin2 "Undefined";
spaces!-to 25;
if flagp(fn,'naryargs) then prin2 " Nary Args "
else if (y:=get(fn,'number!-of!-args)) then
<<prin2 " "; prin2 y; prin2 " Args ">>;
underline2 (linelength(nil)-10);
if x then
<<newline 15; prtatm "Line:"; spaces!-to 27;
prtnum cddr x; prtatm '!/; prtnum cadr x;
prtatm " in "; prtatm car x>>;
cref51(fn,'calledby,"Called by:");
cref51(fn,'calls,"Calls:");
cref51(fn,'alsois,"Is also:");
cref51(fn,'sameas,"Same as:");
if !*globals then cref51(fn,'globs,"Globals:")
end;
symbolic procedure cref51(x,y,z);
if (x:=get(x,y)) then <<newline 15; prtatm z; lprint(idsort x,27)>>;
symbolic procedure cref6 glb;
% Print single global usage entry.
<<newline 0; prin1 glb; spaces!-to 15;
notuse!*:=t;
cref61(glb,'usedby,"Global in:");
cref61(glb,'usedunby,"Undeclared:");
cref61(glb,'boundby,"Bound in:");
cref61(glb,'setby,"Set by:");
if notuse!* then prtatm "*** Not Used ***">>;
symbolic procedure cref61(x,y,z);
if (x:=get(x,y)) then
<<if not notuse!* then newline 15 else notuse!*:=nil;
prtatm z; lprint(idsort x,27)>>;
% Analyze bodies of LISP functions for functions called, and globals
% used, undefined.
smacro procedure flag1(u,v); flag(list u,v);
smacro procedure remflag1(u,v); remflag(list u,v);
smacro procedure isglob u;
flagp(u,'dclglb);
smacro procedure chkseen s;
% Has this name been encountered already?
if not flagp(s,'seen) then
<<flag1(s,'seen); seen!*:=s . seen!*>>;
smacro procedure globref u;
if not flagp(u,'glb2rf)
then <<flag1(u,'glb2rf); globs!*:=u . globs!*>>;
smacro procedure anatom u;
% Global seen before local..ie detect extended from this.
if !*globals and u and not(u eq 't)
and idp u and not assoc(u,locls!*)
then globref u;
smacro procedure chkgseen g;
if not flagp(g,'gseen) then <<gseen!*:=g . gseen!*;
flag1(g,'gseen)>>;
symbolic procedure do!-global l;
% Catch global defns.
% Distinguish FLUID from GLOBAL later.
if pairp(l:=qcrf car l) and !*globals and toplv!* then
<<for each v in l do chkgseen v; flag(l,'dclglb)>>;
put('global,'anlfn,'do!-global);
put('fluid,'anlfn,'do!-global);
symbolic anlfn procedure unfluid l;
if pairp(l:=qcrf car l) and !*globals and toplv!* then
<<for each v in l do chkgseen v; remflag(l,'dclglb)>>;
symbolic procedure add2locs ll;
begin scalar oldloc;
if !*globals then for each gg in ll do
<<oldloc:=assoc(gg,locls!*);
if not null oldloc then <<
qerline 0;
prin2 "*** Variable ";
prin1 gg;
prin2 " nested declaration in ";
princng curfun!*;
newline 0;
rplacd(oldloc,nil.oldloc)>>
else locls!*:=(gg . list nil) . locls!*;
if isglob(gg) or flagp(gg,'glb2rf) then globind gg;
if flagp(gg,'seen) then
<<qerline 0;
prin2 "*** Function ";
princng gg;
prin2 " used as variable in ";
princng curfun!*;
newline 0>> >>
end;
symbolic procedure globind gg;
<<flag1(gg,'glb2bd); globref gg>>;
symbolic procedure remlocs lln;
begin scalar oldloc;
if !*globals then for each ll in lln do
<<oldloc:=assoc(ll,locls!*);
if null oldloc then
if getd 'begin then rederr list(" Lvar confused",ll)
else error(0,list(" Lvar confused",ll));
if cddr oldloc then rplacd(oldloc,cddr oldloc)
else locls!*:=efface1(oldloc,locls!*)>>
end;
symbolic procedure add2calls fn;
% Update local CALLS!*.
if not(flagp(fn,'nolist) or flagp(fn,'cinthis))
then <<calls!*:=fn . calls!*; flag1(fn,'cinthis)>>;
symbolic procedure anform u;
if atom u then anatom u else anform1 u;
symbolic procedure anforml l;
begin
while not atom l do <<anform car l; l:=cdr l>>;
if l then anatom l
end;
symbolic procedure anform1 u;
begin scalar fn,x;
fn:=car u; u:=cdr u;
if not atom fn then return <<anform1 fn; anforml u>>;
if not idp fn then return nil
else if isglob fn then <<globref fn; return anforml u>>
else if assoc(fn,locls!*) then return anforml u;
add2calls fn;
checkargcount(fn,length u);
if flagp(fn,'noanl) then nil
else if x:=get(fn,'anlfn) then apply1(x,u)
else anforml u
end;
symbolic anlfn procedure lambda u;
<<add2locs car u; anforml cdr u; remlocs car u>>;
symbolic procedure anlsetq u;
<<anforml u;
if !*globals and flagp(u:=car u,'glb2rf) then flag1(u,'glb2st)>>;
put('setq,'anlfn,'anlsetq);
symbolic anlfn procedure cond u;
for each x in u do anforml x;
symbolic anlfn procedure prog u;
<<add2locs car u;
for each x in cdr u do
if not atom x then anform1 x;
remlocs car u>>;
symbolic anlfn procedure function u;
if pairp(u:=car u) then anform1 u
else if isglob u then globref u
else if null assoc(u,locls!*) then add2calls u;
flag('(quote go),'noanl);
symbolic anlfn procedure errorset u;
begin scalar fn,x;
anforml cdr u;
if eqcar(u:=car u,'quote) then return ersanform cadr u
else if not((eqcar(u,'cons) or (x:=eqcar(u,'list)))
and quotp(fn:=cadr u))
then return anform u;
anforml cddr u;
if pairp(fn:=cadr fn) then anform1 fn
else if flagp(fn,'glb2rf) then nil
else if isglob fn then globref fn
else <<add2calls fn; if x then checkargcount(fn,length cddr u)>>
end;
symbolic procedure ersanform u;
begin scalar locls!*;
return anform u
end;
symbolic procedure anlmap u;
<<anforml u;
if quotp(u:=cadr u) and idp(u:=cadr u)
and not isglob u and not assoc(u,locls!*)
then checkargcount(u,1)>>;
for each x in '(map mapc maplist mapcar mapcon mapcan) do
put(x,'anlfn,'anlmap);
symbolic anlfn procedure lispapply u;
begin scalar fn;
anforml cdr u;
if quotp(fn:=cadr u) and idp(fn:=cadr fn) and eqcar(u:=caddr u,'list)
then checkargcount(fn,length cdr u)
end;
symbolic anlfn procedure apply u;
begin scalar fn;
anforml cdr u;
if quotp(fn:=cadr u) and idp(fn:=cadr fn) and eqcar(u:=caddr u,'list)
then checkargcount(fn,length cdr u)
end;
symbolic procedure quotp u; eqcar(u,'quote) or eqcar(u,'function);
put('cref ,'simpfg ,'((t (crefon)) (nil (crefoff))));
symbolic procedure outref(s,varlis,body,type);
begin scalar curfun!*,calls!*,globs!*,locls!*,toplv!*,a;
a:=if varlis memq '(anp!!atom anp!!idb anp!!eq anp!!unknown)
then nil
else length varlis;
s := outrdefun(s,type,if a then a else get(body,'number!-of!-args));
if a then <<add2locs varlis; anform(body); remlocs varlis>>
else if null body or not idp body then nil
else if varlis eq 'anp!!eq
then <<put(s,'sameas,list body); traput(body,'alsois,s)>>
else add2calls body;
outrefend s
end;
symbolic procedure traput(u,v,w);
begin scalar a;
if a:=get(u,v) then
(if not(toplv!* or w memq a) then rplacd(a,w . cdr a))
else put(u,v,list w)
end;
smacro procedure toput(u,v,w);
if w then put(u,v,if toplv!* then union(w,get(u,v)) else w);
symbolic procedure union(x,y);
if null x then y
else union(cdr x,if car x member y then y else car x . y);
symbolic procedure outrefend s;
<<toput(s,'calls,calls!*);
for each x in calls!* do
<<remflag1(x,'cinthis);
if not x eq s then <<chkseen x; traput(x,'calledby,s)>> >>;
toput(s,'globs,globs!*);
for each x in globs!* do
<<traput(x,if isglob x then 'usedby
else <<chkgseen x; 'usedunby>>,s);
remflag1(x,'glb2rf);
if flagp(x,'glb2bd)
then <<remflag1(x,'glb2bd); traput(x,'boundby,s)>>;
if flagp(x,'glb2st)
then <<remflag1(x,'glb2st); traput(x,'setby,s)>> >> >>;
symbolic procedure recref(s,type);
<<qerline 2;
prtatm "*** Redefinition to ";
prin1 type;
prtatm " procedure, of:";
cref5 s;
rempropss(list s,'(calls globs sameas));
newline 2>>;
symbolic procedure outrdefun(s,type,v);
begin
s:=qtypnm(s,type);
if flagp(s,'defd) then recref(s,type)
else flag1(s,'defd);
if flagp(type,'function) and (isglob s or assoc(s,locls!*)) then
<<qerline 0;
prin2 "**** Variable ";
princng s;
prin2 " defined as function";
newline 0>>;
if v and not flagp(type,'naryarg) then defineargs(s,v)
else if flagp(type,'naryarg) and not flagp(s,'naryargs)
then flag1(s,'naryargs);
put(s,'gall,curlin!* . type);
globs!*:=nil;
calls!*:=nil;
return curfun!*:=s
end;
flag('(macro fexpr),'naryarg);
symbolic procedure qtypnm(s,type);
if flagp(type,'function) then <<chkseen s; s>>
else begin scalar x,y,z;
if (y:=get(type,'tseen)) and (x:=atsoc(s,cdr y))
then return cdr x;
if null y then
<<y:=list ('!( . nconc(explode type,list '!)));
put(type,'tseen,y); tseen!* := type . tseen!*>>;
x := compress (z := explode s);
rplacd(y,(s . x) . cdr y);
y := append(car y,z);
put(x,'rccnam,length y . y);
traput(type,'funs,x);
return x
end;
symbolic procedure defineargs(name,n);
begin scalar calledwith,x;
calledwith:=get(name,'number!-of!-args);
if null calledwith then return hasarg(name,n);
if n=calledwith then return nil;
if x := get(name,'calledby) then instdof(name,n,calledwith,x);
hasarg(name,n)
end;
symbolic procedure instdof(name,n,m,fnlst);
<<qerline 0;
prin2 "***** ";
prin1 name;
prin2 " called with ";
prin2 m;
prin2 " instead of ";
prin2 n;
prin2 " arguments in:";
lprint(idsort fnlst,posn()+1);
newline 0>>;
symbolic procedure hasarg(name,n);
<<haveargs!*:=name . haveargs!*;
if n>maxarg!* then
<<qerline 0;
prin2 "**** "; prin1 name;
prin2 " has "; prin2 n;
prin2 " arguments";
newline 0 >>;
put(name,'number!-of!-args,n)>>;
symbolic procedure checkargcount(name,n);
begin scalar correctn;
if flagp(name,'naryargs) then return nil;
correctn:=get(name,'number!-of!-args);
if null correctn then return hasarg(name,n);
if not correctn=n then instdof(name,correctn,n,list curfun!*)
end;
symbolic procedure refprint u;
begin scalar x,y;
% x:=if cloc!* then filemk car cloc!* else "*ttyinput*";
x:=if cloc!* then car cloc!* else "*TTYINPUT*";
if (curfun!*:=assoc(x,pfiles!*)) then
<<x:=car curfun!*; curfun!*:=cdr curfun!*>>
else <<pfiles!*:=(x.(curfun!*:=gensym())).pfiles!*;
y:=reversip cdr reversip cdr explode x;
put(curfun!*,'rccnam,length y . y)>>;
curlin!*:=if cloc!* and cdr cloc!* then x . cdr cloc!* else nil;
calls!*:=globs!*:=locls!*:=nil;
anform u;
outrefend curfun!*
end;
symbolic procedure filemk u;
% Convert a file specification from lisp format to a string.
% This is essentially the inverse of MKFILE.
begin scalar dev,name,flg,flg2;
if null u then return nil
else if atom u then name := explode2 u
else for each x in u do
if x eq 'dir!: then flg := t
else if atom x then
if flg then dev := '!< . nconc(explode2 x,list '!>)
else if x eq 'dsk!: then dev:=nil
else if !%devp x then dev := explode2 x
else name := explode2 x
else if atom cdr x then
name := nconc(explode2 car x,'!. . explode2 cdr x)
else <<flg2 := t;
dev := '![ . nconc(explode2 car x,
'!, . nconc(explode2 cadr x,list '!]))>>;
u := if flg2 then nconc(name,dev)
else nconc(dev,name);
return compress('!" . nconc(u,'(!")))
end;
flag('(smacro nmacro),'cref);
symbolic anlfn procedure put u;
if toplv!* and qcputx cadr u then anputx u
else anforml u;
put('putc,'anlfn,get('put,'anlfn));
symbolic procedure qcputx u;
eqcar(u,'quote) and (flagp(cadr u,'cref) or flagp(cadr u,'compile));
symbolic procedure anputx u;
begin scalar nam,typ,body;
nam:=qcrf car u;
typ:=qcrf cadr u;
u:=caddr u;
if atom u then <<body:=qcrf u; u:='anp!!atom>>
else if car u memq '(quote function) then
if eqcar(u:=cadr u,'lambda) then <<body:=caddr u; u:=cadr u>>
else if idp u then <<body:=u; u:='anp!!idb>>
else return nil
else if car u eq 'cdr and eqcar(cadr u,'getd) then
<<body:=qcrf cadadr u; u:='anp!!eq>>
else if car u eq 'get and qcputx caddr u then
<<body:=qtypnm(qcrf cadr u,cadr caddr u); u:='anp!!eq>>
else if car u eq 'mkcode then
<<anform cadr u; u:=qcrf caddr u; body:=nil>>
else <<body:=qcrf u; u:='anp!!unknown>>;
outref(nam,u,body,typ)
end;
symbolic anlfn procedure putd u;
if toplv!* then anputx u else anforml u;
symbolic anlfn procedure de u;
outdefr(u,'expr);
symbolic anlfn procedure df u;
outdefr(u,'fexpr);
symbolic anlfn procedure dm u;
outdefr(u,'macro);
symbolic anlfn procedure dn u; % PSL function.
outdefr(u,'macro);
symbolic anlfn procedure ds u; % PSL function.
outdefr(u,'smacro);
symbolic procedure outdefr(u,type);
outref(car u,cadr u,caddr u,type);
symbolic procedure qcrf u;
if null u or u eq t then u
else if eqcar(u,'quote) then cadr u
else <<anform u; compress explode '!?value!?!?>>;
flag('(expr fexpr macro smacro nmacro),'function);
symbolic anlfn procedure lap u;
if pairp(u:=qcrf car u) then
begin scalar globs!*,locls!*,calls!*,curfun!*,toplv!*,x;
while u do
<<if pairp car u then
if x:=get(op!*!*:=caar u,'crflapo) then apply1(x,u)
else if !*globals then for each y in cdar u do anlapev y;
u:=cdr u>>;
qoutrefe()
end;
symbolic crflapo procedure !*entry u;
<<qoutrefe(); u:=cdar u; outrdefun(car u,cadr u,caddr u)>>;
symbolic procedure qoutrefe;
begin
if null curfun!* then
if globs!* or calls!* then
<<curfun!*:=compress explode '!?lap!?!?; chkseen curfun!*>>
else return;
outrefend curfun!*
end;
symbolic crflapo procedure !*lambind u;
for each x in caddar u do globind car x;
symbolic crflapo procedure !*progbind u;
for each x in cadar u do globind car x;
symbolic procedure lincall u;
<<add2calls car (u:=cdar u); checkargcount(car u,caddr u)>>;
put('!*link,'crflapo,'lincall);
put('!*linke,'crflapo,'lincall);
symbolic procedure anlapev u;
if pairp u then
if car u memq '(global fluid) then
<<u:=cadr u; globref u;
if flagp(op!*!*,'store) then put(u,'glb2st,'t)>>
else <<anlapev car u; anlapev cdr u>>;
flag('(!*store),'store);
symbolic procedure qerline u;
if pretitl!* then newline u
else <<pretitl!*:=t; newpage()>>;
% These functions defined to be able to run in bare LISP.
symbolic procedure eqcar(u,v);
pairp u and car u eq v;
symbolic procedure mkquote u; list('quote,u);
symbolic procedure efface1(u,v);
if null v then nil
else if u eq car v then cdr v
else rplacd(v,efface1(u,cdr v));
% DECSystem 10/20 dependent part.
flag('(pop movem setzm hrrzm),'store);
symbolic procedure lapcallf u;
begin scalar fn;
return
if eqcar(cadr (u:=cdar u),'e) then
<<add2calls(fn:=cadadr u); checkargcount(fn,car u)>>
else if !*globals then anlapev cadr u
end;
put('jcall,'crflapo,'lapcallf);
put('callf,'crflapo,'lapcallf);
put('jcallf,'crflapo,'lapcallf);
symbolic crflapo procedure call u;
if not(caddar u = '(e !*lambind!*)) then lapcallf u
else while ((u:=cdr u) and pairp car u and caar u = 0) do
globind cadr caddar u;
endmodule;
module redio; % General Purpose I/O package, sorting and positioning.
% Author: Martin L. Griss.
% Modified by: Anthony C. Hearn.
fluid '(orig!*);
global '(!*formfeed lnnum!* maxln!* pgnum!* title!*);
% This module is functionally equivalent to the PSL file PSL-CREFIO.RED.
% FORMFEED (ON) controls ^L or spacer of ====;
symbolic procedure initio();
% Set-up common defaults;
begin
!*formfeed:=t;
orig!*:=0;
lnnum!*:=0;
linelength(75);
maxln!*:=55;
title!*:=nil;
pgnum!*:=1;
end;
% symbolic procedure lposn(); lnnum!*; % Actually part of Standard LISP.
initio();
symbolic procedure setpgln(p,l);
begin if p then maxln!*:=p;
if l then linelength(l);
end;
% We use EXPLODE to produce a list of chars from atomname,
% and TERPRI() to terminate a buffer..all else
% done in package..spaces,tabs,etc. ;
Comment Character lists are (length . chars), for FITS;
symbolic procedure getes u;
% Returns for U , eee=(Length . List of char);
begin scalar eee;
if not idp u then return<<eee:=explode u;length(eee).eee>>;
if not(eee:=get(u,'rccnam)) then <<eee:=explode(u);
eee:=length(eee) . eee;
put(u,'rccnam,eee)>>;
return eee;
end;
% symbolic smacro procedure prtwrd u;
% if numberp u then prtnum u else prtatm u;
symbolic procedure prtatm u;
prin2 u; % For a nice print;
symbolic procedure prtlst u;
if atom u then prin2 u else for each x in u do prin2 x;
symbolic procedure prtnum n;
% We use this kludge to defeat the new line that several LISPs
% including PSL like to insert when printing a number near the line
% boundary.
for each x in explode2 n do prin2 x;
symbolic procedure princn eee;
% output a list of chars, update POSN();
while (eee:=cdr eee) do prin2 car eee;
symbolic procedure spaces n; for i:=1:n do prin2 '! ;
symbolic procedure spaces!-to n;
begin scalar x;
x := n - posn();
if x<1 then newline n
else spaces x;
end;
symbolic procedure setpage(title,page);
% Initialise current page and title;
begin
title!*:= title ;
pgnum!*:=page;
end;
symbolic procedure newline n;
% Begins a fresh line at posn N;
begin
lnnum!*:=lnnum!*+1;
if lnnum!*>=maxln!* then newpage()
else terpri();
spaces(orig!*+n);
end;
symbolic procedure newpage();
% Start a fresh page, with PGNUM and TITLE, if needed;
begin scalar a;
% a:=lposn();
a := lnnum!*;
lnnum!*:=0;
if posn() neq 0 then newline 0;
if a neq 0 then formfeed();
if title!* then
<<spaces!-to 5; prtlst title!*>>;
spaces!-to (linelength(nil)-4);
if pgnum!* then <<prtnum pgnum!*; pgnum!*:=pgnum!*+1>>
else pgnum!*:=2;
newline 10;
newline 0;
end;
symbolic procedure underline2 n;
if n>=linelength(nil) then
<<n:=linelength(nil)-posn();
for i:=0:n do prin2 '!- ;
newline(0)>>
else begin scalar j;
j:=n-posn();
for i:=0:j do prin2 '!-;
end;
symbolic procedure lprint(u,n);
% prints a list of atoms within block LINELENGTH(NIL)-n;
begin scalar eee; integer l,m;
spaces!-to n;
l := linelength nil-posn();
if l<=0 then error(13,"WINDOW TOO SMALL FOR LPRINT");
while u do
<<eee:=getes car u; u:=cdr u;
if linelength nil<posn() then newline n;
if car eee<(m := linelength nil-posn()) then princn eee
else if car eee<l then <<newline n; princn eee>>
else begin
eee := cdr eee;
a: for i := 1:m do <<prin2 car eee; eee := cdr eee>>;
newline n;
if null eee then nil
else if length eee<(m := l) then princn(nil . eee)
else go to a
end;
if posn()<linelength nil then prin2 '! >>
end;
symbolic procedure rempropss(atmlst,lst);
for each x in atmlst do
for each y in lst do remprop(x,y);
symbolic procedure remflagss(atmlst,lst);
for each x in lst do remflag(atmlst,x);
symbolic procedure formfeed;
if !*formfeed then eject()
else <<terpri();
prin2 " ========================================= ";
terpri()>>;
endmodule;
end;