+#ifndef lint
+static char sccsid[] = "@(#)cpp.c 1.1 %G%";
+#endif lint
+#ifdef FLEXNAMES
+#define NCPS 128
+#else
+#define NCPS 8
+#endif
+
+# include "stdio.h"
+/* C command
+/* written by John F. Reiser
+/* July/August 1978
+*/
+
+#define STATIC
+
+#define STDIN 0
+#define STDOUT 1
+#define STDERR 2
+#define READ 0
+#define WRITE 1
+#define SALT '#'
+#ifndef BUFSIZ
+#define BUFSIZ 512
+#endif
+
+char *pbeg,*pbuf,*pend;
+char *outp,*inp;
+char *newp;
+char cinit;
+
+/* some code depends on whether characters are sign or zero extended */
+/* #if '\377' < 0 not used here, old cpp doesn't understand */
+#if pdp11 | vax
+#define COFF 128
+#else
+#define COFF 0
+#endif
+
+# if gcos
+#define ALFSIZ 512 /* alphabet size */
+# else
+#define ALFSIZ 256 /* alphabet size */
+# endif
+char macbit[ALFSIZ+11];
+char toktyp[ALFSIZ];
+#define BLANK 1
+#define IDENT 2
+#define NUMBR 3
+
+/* a superimposed code is used to reduce the number of calls to the
+/* symbol table lookup routine. (if the kth character of an identifier
+/* is 'a' and there are no macro names whose kth character is 'a'
+/* then the identifier cannot be a macro name, hence there is no need
+/* to look in the symbol table.) 'scw1' enables the test based on
+/* single characters and their position in the identifier. 'scw2'
+/* enables the test based on adjacent pairs of characters and their
+/* position in the identifier. scw1 typically costs 1 indexed fetch,
+/* an AND, and a jump per character of identifier, until the identifier
+/* is known as a non-macro name or until the end of the identifier.
+/* scw1 is inexpensive. scw2 typically costs 4 indexed fetches,
+/* an add, an AND, and a jump per character of identifier, but it is also
+/* slightly more effective at reducing symbol table searches.
+/* scw2 usually costs too much because the symbol table search is
+/* usually short; but if symbol table search should become expensive,
+/* the code is here.
+/* using both scw1 and scw2 is of dubious value.
+*/
+#define scw1 1
+#define scw2 0
+
+#if scw2
+char t21[ALFSIZ],t22[ALFSIZ],t23[ALFSIZ+NCPS];
+#endif
+
+#if scw1
+#define b0 1
+#define b1 2
+#define b2 4
+#define b3 8
+#define b4 16
+#define b5 32
+#define b6 64
+#define b7 128
+#endif
+
+#define IB 1
+#define SB 2
+#define NB 4
+#define CB 8
+#define QB 16
+#define WB 32
+char fastab[ALFSIZ];
+char slotab[ALFSIZ];
+char *ptrtab;
+#define isslo (ptrtab==(slotab+COFF))
+#define isid(a) ((fastab+COFF)[a]&IB)
+#define isspc(a) (ptrtab[a]&SB)
+#define isnum(a) ((fastab+COFF)[a]&NB)
+#define iscom(a) ((fastab+COFF)[a]&CB)
+#define isquo(a) ((fastab+COFF)[a]&QB)
+#define iswarn(a) ((fastab+COFF)[a]&WB)
+
+#define eob(a) ((a)>=pend)
+#define bob(a) (pbeg>=(a))
+
+char buffer[NCPS+BUFSIZ+BUFSIZ+NCPS];
+
+# define SBSIZE 48000 /* std = 12000, wnj aug 1979 */
+char sbf[SBSIZE];
+char *savch = sbf;
+
+# define DROP 0xFE /* special character not legal ASCII or EBCDIC */
+# define WARN DROP
+# define SAME 0
+# define MAXINC 10
+# define MAXFRE 14 /* max buffers of macro pushback */
+# define MAXFRM 31 /* max number of formals/actuals to a macro */
+
+static char warnc = WARN;
+
+int mactop,fretop;
+char *instack[MAXFRE],*bufstack[MAXFRE],*endbuf[MAXFRE];
+
+int plvl; /* parenthesis level during scan for macro actuals */
+int maclin; /* line number of macro call requiring actuals */
+char *macfil; /* file name of macro call requiring actuals */
+char *macnam; /* name of macro requiring actuals */
+int maclvl; /* # calls since last decrease in nesting level */
+char *macforw; /* pointer which must be exceeded to decrease nesting level */
+int macdam; /* offset to macforw due to buffer shifting */
+
+#if tgp
+int tgpscan; /* flag for dump(); */
+#endif
+
+STATIC int inctop[MAXINC];
+STATIC char *fnames[MAXINC];
+STATIC char *dirnams[MAXINC]; /* actual directory of #include files */
+STATIC int fins[MAXINC];
+STATIC int lineno[MAXINC];
+
+STATIC char *dirs[10]; /* -I and <> directories */
+char *strdex(), *copy(), *subst(), *trmdir();
+struct symtab *stsym();
+STATIC int fin = STDIN;
+STATIC FILE *fout = stdout;
+STATIC int nd = 1;
+STATIC int pflag; /* don't put out lines "# 12 foo.c" */
+STATIC int passcom; /* don't delete comments */
+STATIC int rflag; /* allow macro recursion */
+STATIC int ifno;
+# define NPREDEF 20
+STATIC char *prespc[NPREDEF];
+STATIC char **predef = prespc;
+STATIC char *punspc[NPREDEF];
+STATIC char **prund = punspc;
+STATIC int exfail;
+struct symtab {
+ char *name;
+ char *value;
+} *lastsym, *lookup(), *slookup();
+
+# if gcos
+#include <setjmp.h>
+static jmp_buf env;
+# define main mainpp
+# undef exit
+# define exit(S) longjmp(env, 1)
+# define open(S,D) fileno(fopen(S, "r"))
+# define close(F) fclose(_f[F])
+extern FILE *_f[];
+# define symsiz 500
+# else
+# define symsiz 1000 /* std = 500, wnj aug 1979 */
+# endif
+STATIC struct symtab stab[symsiz];
+
+STATIC struct symtab *defloc;
+STATIC struct symtab *udfloc;
+STATIC struct symtab *incloc;
+STATIC struct symtab *ifloc;
+STATIC struct symtab *elsloc;
+STATIC struct symtab *eifloc;
+STATIC struct symtab *ifdloc;
+STATIC struct symtab *ifnloc;
+STATIC struct symtab *ysysloc;
+STATIC struct symtab *varloc;
+STATIC struct symtab *lneloc;
+STATIC struct symtab *ulnloc;
+STATIC struct symtab *uflloc;
+STATIC int trulvl;
+STATIC int flslvl;
+
+sayline() {
+ if (pflag==0) fprintf(fout,"# %d \"%s\"\n", lineno[ifno], fnames[ifno]);
+}
+
+/* data structure guide
+/*
+/* most of the scanning takes place in the buffer:
+/*
+/* (low address) (high address)
+/* pbeg pbuf pend
+/* | <-- BUFSIZ chars --> | <-- BUFSIZ chars --> |
+/* _______________________________________________________________________
+/* |_______________________________________________________________________|
+/* | | |
+/* |<-- waiting -->| |<-- waiting -->
+/* | to be |<-- current -->| to be
+/* | written | token | scanned
+/* | | |
+/* outp inp p
+/*
+/* *outp first char not yet written to output file
+/* *inp first char of current token
+/* *p first char not yet scanned
+/*
+/* macro expansion: write from *outp to *inp (chars waiting to be written),
+/* ignore from *inp to *p (chars of the macro call), place generated
+/* characters in front of *p (in reverse order), update pointers,
+/* resume scanning.
+/*
+/* symbol table pointers point to just beyond the end of macro definitions;
+/* the first preceding character is the number of formal parameters.
+/* the appearance of a formal in the body of a definition is marked by
+/* 2 chars: the char WARN, and a char containing the parameter number.
+/* the first char of a definition is preceded by a zero character.
+/*
+/* when macro expansion attempts to back up over the beginning of the
+/* buffer, some characters preceding *pend are saved in a side buffer,
+/* the address of the side buffer is put on 'instack', and the rest
+/* of the main buffer is moved to the right. the end of the saved buffer
+/* is kept in 'endbuf' since there may be nulls in the saved buffer.
+/*
+/* similar action is taken when an 'include' statement is processed,
+/* except that the main buffer must be completely emptied. the array
+/* element 'inctop[ifno]' records the last side buffer saved when
+/* file 'ifno' was included. these buffers remain dormant while
+/* the file is being read, and are reactivated at end-of-file.
+/*
+/* instack[0 : mactop] holds the addresses of all pending side buffers.
+/* instack[inctop[ifno]+1 : mactop-1] holds the addresses of the side
+/* buffers which are "live"; the side buffers instack[0 : inctop[ifno]]
+/* are dormant, waiting for end-of-file on the current file.
+/*
+/* space for side buffers is obtained from 'savch' and is never returned.
+/* bufstack[0:fretop-1] holds addresses of side buffers which
+/* are available for use.
+*/
+
+dump() {
+/* write part of buffer which lies between outp and inp .
+/* this should be a direct call to 'write', but the system slows to a crawl
+/* if it has to do an unaligned copy. thus we buffer. this silly loop
+/* is 15% of the total time, thus even the 'putc' macro is too slow.
+*/
+ register char *p1,*p2; register FILE *f;
+ if ((p1=outp)==inp || flslvl!=0) return;
+#if tgp
+#define MAXOUT 80
+ if (!tgpscan) {/* scan again to insure <= MAXOUT chars between linefeeds */
+ register char c,*pblank; char savc,stopc,brk;
+ tgpscan=1; brk=stopc=pblank=0; p2=inp; savc= *p2; *p2='\0';
+ while (c= *p1++) {
+ if (c=='\\') c= *p1++;
+ if (stopc==c) stopc=0;
+ else if (c=='"' || c=='\'') stopc=c;
+ if (p1-outp>MAXOUT && pblank!=0) {
+ *pblank++='\n'; inp=pblank; dump(); brk=1; pblank=0;
+ }
+ if (c==' ' && stopc==0) pblank=p1-1;
+ }
+ if (brk) sayline();
+ *p2=savc; inp=p2; p1=outp; tgpscan=0;
+ }
+#endif
+ f=fout;
+# if gcos
+/* filter out "$ program c" card if first line of input */
+/* gmatch is a simple pattern matcher in the GCOS Standard Library */
+{ static int gmfirst = 0;
+ if (!gmfirst) {
+ ++gmfirst;
+ if (gmatch(p1, "^$*program[ \t]*c*"))
+ p1 = strdex(p1, '\n');
+ }
+}
+# endif
+ while (p1<inp) putc(*p1++,f);
+ outp=p1;
+}
+
+char *
+refill(p) register char *p; {
+/* dump buffer. save chars from inp to p. read into buffer at pbuf,
+/* contiguous with p. update pointers, return new p.
+*/
+ register char *np,*op; register int ninbuf;
+ dump(); np=pbuf-(p-inp); op=inp;
+ if (bob(np+1)) {pperror("token too long"); np=pbeg; p=inp+BUFSIZ;}
+ macdam += np-inp; outp=inp=np;
+ while (op<p) *np++= *op++;
+ p=np;
+ for (;;) {
+ if (mactop>inctop[ifno]) {/* retrieve hunk of pushed-back macro text */
+ op=instack[--mactop]; np=pbuf;
+ do {while (*np++= *op++);} while (op<endbuf[mactop]); pend=np-1;
+ /* make buffer space avail for 'include' processing */
+ if (fretop<MAXFRE) bufstack[fretop++]=instack[mactop];
+ return(p);
+ } else {/* get more text from file(s) */
+ maclvl=0;
+ if (0<(ninbuf=read(fin,pbuf,BUFSIZ))) {
+ pend=pbuf+ninbuf; *pend='\0';
+ return(p);
+ }
+ /* end of #include file */
+ if (ifno==0) {/* end of input */
+ if (plvl!=0) {
+ int n=plvl,tlin=lineno[ifno]; char *tfil=fnames[ifno];
+ lineno[ifno]=maclin; fnames[ifno]=macfil;
+ pperror("%s: unterminated macro call",macnam);
+ lineno[ifno]=tlin; fnames[ifno]=tfil;
+ np=p; *np++='\n'; /* shut off unterminated quoted string */
+ while (--n>=0) *np++=')'; /* supply missing parens */
+ pend=np; *np='\0'; if (plvl<0) plvl=0;
+ return(p);
+ }
+ inp=p; dump(); exit(exfail);
+ }
+ close(fin); fin=fins[--ifno]; dirs[0]=dirnams[ifno]; sayline();
+ }
+ }
+}
+
+#define BEG 0
+#define LF 1
+
+char *
+cotoken(p) register char *p; {
+ register int c,i; char quoc;
+ static int state = BEG;
+
+ if (state!=BEG) goto prevlf;
+for (;;) {
+again:
+ while (!isspc(*p++));
+ switch (*(inp=p-1)) {
+ case 0: {
+ if (eob(--p)) {p=refill(p); goto again;}
+ else ++p; /* ignore null byte */
+ } break;
+ case '|': case '&': for (;;) {/* sloscan only */
+ if (*p++== *inp) break;
+ if (eob(--p)) p=refill(p);
+ else break;
+ } break;
+ case '=': case '!': for (;;) {/* sloscan only */
+ if (*p++=='=') break;
+ if (eob(--p)) p=refill(p);
+ else break;
+ } break;
+ case '<': case '>': for (;;) {/* sloscan only */
+ if (*p++=='=' || p[-2]==p[-1]) break;
+ if (eob(--p)) p=refill(p);
+ else break;
+ } break;
+ case '\\': for (;;) {
+ if (*p++=='\n') {++lineno[ifno]; break;}
+ if (eob(--p)) p=refill(p);
+ else {++p; break;}
+ } break;
+ case '/': for (;;) {
+ if (*p++=='*') {/* comment */
+ if (!passcom) {inp=p-2; dump(); ++flslvl;}
+ for (;;) {
+ while (!iscom(*p++));
+ if (p[-1]=='*') for (;;) {
+ if (*p++=='/') goto endcom;
+ if (eob(--p)) {
+ if (!passcom) {inp=p; p=refill(p);}
+ else if ((p-inp)>=BUFSIZ) {/* split long comment */
+ inp=p; p=refill(p); /* last char written is '*' */
+ putc('/',fout); /* terminate first part */
+ /* and fake start of 2nd */
+ outp=inp=p-=3; *p++='/'; *p++='*'; *p++='*';
+ } else p=refill(p);
+ } else break;
+ } else if (p[-1]=='\n') {
+ ++lineno[ifno]; if (!passcom) putc('\n',fout);
+ } else if (eob(--p)) {
+ if (!passcom) {inp=p; p=refill(p);}
+ else if ((p-inp)>=BUFSIZ) {/* split long comment */
+ inp=p; p=refill(p);
+ putc('*',fout); putc('/',fout);
+ outp=inp=p-=2; *p++='/'; *p++='*';
+ } else p=refill(p);
+ } else ++p; /* ignore null byte */
+ }
+ endcom:
+ if (!passcom) {outp=inp=p; --flslvl; goto again;}
+ break;
+ }
+ if (eob(--p)) p=refill(p);
+ else break;
+ } break;
+# if gcos
+ case '`':
+# endif
+ case '"': case '\'': {
+ quoc=p[-1];
+ for (;;) {
+ while (!isquo(*p++));
+ if (p[-1]==quoc) break;
+ if (p[-1]=='\n') {--p; break;} /* bare \n terminates quotation */
+ if (p[-1]=='\\') for (;;) {
+ if (*p++=='\n') {++lineno[ifno]; break;} /* escaped \n ignored */
+ if (eob(--p)) p=refill(p);
+ else {++p; break;}
+ } else if (eob(--p)) p=refill(p);
+ else ++p; /* it was a different quote character */
+ }
+ } break;
+ case '\n': {
+ ++lineno[ifno]; if (isslo) {state=LF; return(p);}
+prevlf:
+ state=BEG;
+ for (;;) {
+ if (*p++=='#') return(p);
+ if (eob(inp= --p)) p=refill(p);
+ else goto again;
+ }
+ } break;
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ for (;;) {
+ while (isnum(*p++));
+ if (eob(--p)) p=refill(p);
+ else break;
+ } break;
+ case 'A': case 'B': case 'C': case 'D': case 'E':
+ case 'F': case 'G': case 'H': case 'I': case 'J':
+ case 'K': case 'L': case 'M': case 'N': case 'O':
+ case 'P': case 'Q': case 'R': case 'S': case 'T':
+ case 'U': case 'V': case 'W': case 'X': case 'Y':
+ case 'Z': case '_':
+ case 'a': case 'b': case 'c': case 'd': case 'e':
+ case 'f': case 'g': case 'h': case 'i': case 'j':
+ case 'k': case 'l': case 'm': case 'n': case 'o':
+ case 'p': case 'q': case 'r': case 's': case 't':
+ case 'u': case 'v': case 'w': case 'x': case 'y':
+ case 'z':
+#if scw1
+#define tmac1(c,bit) if (!xmac1(c,bit,&)) goto nomac
+#define xmac1(c,bit,op) ((macbit+COFF)[c] op (bit))
+#else
+#define tmac1(c,bit)
+#define xmac1(c,bit,op)
+#endif
+
+#if scw2
+#define tmac2(c0,c1,cpos) if (!xmac2(c0,c1,cpos,&)) goto nomac
+#define xmac2(c0,c1,cpos,op)\
+ ((macbit+COFF)[(t21+COFF)[c0]+(t22+COFF)[c1]] op (t23+COFF+cpos)[c0])
+#else
+#define tmac2(c0,c1,cpos)
+#define xmac2(c0,c1,cpos,op)
+#endif
+
+ if (flslvl) goto nomac;
+ for (;;) {
+ c= p[-1]; tmac1(c,b0);
+ i= *p++; if (!isid(i)) goto endid; tmac1(i,b1); tmac2(c,i,0);
+ c= *p++; if (!isid(c)) goto endid; tmac1(c,b2); tmac2(i,c,1);
+ i= *p++; if (!isid(i)) goto endid; tmac1(i,b3); tmac2(c,i,2);
+ c= *p++; if (!isid(c)) goto endid; tmac1(c,b4); tmac2(i,c,3);
+ i= *p++; if (!isid(i)) goto endid; tmac1(i,b5); tmac2(c,i,4);
+ c= *p++; if (!isid(c)) goto endid; tmac1(c,b6); tmac2(i,c,5);
+ i= *p++; if (!isid(i)) goto endid; tmac1(i,b7); tmac2(c,i,6);
+ tmac2(i,0,7);
+ while (isid(*p++));
+ if (eob(--p)) {refill(p); p=inp+1; continue;}
+ goto lokid;
+ endid:
+ if (eob(--p)) {refill(p); p=inp+1; continue;}
+ tmac2(p[-1],0,-1+(p-inp));
+ lokid:
+ slookup(inp,p,0); if (newp) {p=newp; goto again;}
+ else break;
+ nomac:
+ while (isid(*p++));
+ if (eob(--p)) {p=refill(p); goto nomac;}
+ else break;
+ } break;
+ } /* end of switch */
+
+ if (isslo) return(p);
+} /* end of infinite loop */
+}
+
+char *
+skipbl(p) register char *p; {/* get next non-blank token */
+ do {outp=inp=p; p=cotoken(p);} while ((toktyp+COFF)[*inp]==BLANK);
+ return(p);
+}
+
+char *
+unfill(p) register char *p; {
+/* take <= BUFSIZ chars from right end of buffer and put them on instack .
+/* slide rest of buffer to the right, update pointers, return new p.
+*/
+ register char *np,*op; register int d;
+ if (mactop>=MAXFRE) {
+ pperror("%s: too much pushback",macnam);
+ p=inp=pend; dump(); /* begin flushing pushback */
+ while (mactop>inctop[ifno]) {p=refill(p); p=inp=pend; dump();}
+ }
+ if (fretop>0) np=bufstack[--fretop];
+ else {
+ np=savch; savch+=BUFSIZ;
+ if (savch>=sbf+SBSIZE) {pperror("no space"); exit(exfail);}
+ *savch++='\0';
+ }
+ instack[mactop]=np; op=pend-BUFSIZ; if (op<p) op=p;
+ for (;;) {while (*np++= *op++); if (eob(op)) break;} /* out with old */
+ endbuf[mactop++]=np; /* mark end of saved text */
+ np=pbuf+BUFSIZ; op=pend-BUFSIZ; pend=np; if (op<p) op=p;
+ while (outp<op) *--np= *--op; /* slide over new */
+ if (bob(np)) pperror("token too long");
+ d=np-outp; outp+=d; inp+=d; macdam+=d; return(p+d);
+}
+
+char *
+doincl(p) register char *p; {
+ int filok,inctype;
+ register char *cp; char **dirp,*nfil; char filname[BUFSIZ];
+
+ p=skipbl(p); cp=filname;
+ if (*inp++=='<') {/* special <> syntax */
+ inctype=1;
+ ++flslvl; /* prevent macro expansion */
+ for (;;) {
+ outp=inp=p; p=cotoken(p);
+ if (*inp=='\n') {--p; *cp='\0'; break;}
+ if (*inp=='>') { *cp='\0'; break;}
+# ifdef gimpel
+ if (*inp=='.' && !intss()) *inp='#';
+# endif
+ while (inp<p) *cp++= *inp++;
+ }
+ --flslvl; /* reenable macro expansion */
+ } else if (inp[-1]=='"') {/* regular "" syntax */
+ inctype=0;
+# ifdef gimpel
+ while (inp<p) {if (*inp=='.' && !intss()) *inp='#'; *cp++= *inp++;}
+# else
+ while (inp<p) *cp++= *inp++;
+# endif
+ if (*--cp=='"') *cp='\0';
+ } else {pperror("bad include syntax",0); inctype=2;}
+ /* flush current file to \n , then write \n */
+ ++flslvl; do {outp=inp=p; p=cotoken(p);} while (*inp!='\n'); --flslvl;
+ inp=p; dump(); if (inctype==2) return(p);
+ /* look for included file */
+ if (ifno+1 >=MAXINC) {
+ pperror("Unreasonable include nesting",0); return(p);
+ }
+ if((nfil=savch)>sbf+SBSIZE-BUFSIZ) {pperror("no space"); exit(exfail);}
+ filok=0;
+ for (dirp=dirs+inctype; *dirp; ++dirp) {
+ if (
+# if gcos
+ strdex(filname, '/')
+# else
+ filname[0]=='/'
+# endif
+ || **dirp=='\0') strcpy(nfil,filname);
+ else {
+ strcpy(nfil,*dirp);
+# if unix || gcos
+ strcat(nfil,"/");
+# endif
+#ifdef ibm
+#ifndef gimpel
+ strcat(nfil,".");
+#endif
+#endif
+ strcat(nfil,filname);
+ }
+ if (0<(fins[ifno+1]=open(nfil,READ))) {
+ filok=1; fin=fins[++ifno]; break;
+ }
+ }
+ if (filok==0) pperror("Can't find include file %s",filname);
+ else {
+ lineno[ifno]=1; fnames[ifno]=cp=nfil; while (*cp++); savch=cp;
+ dirnams[ifno]=dirs[0]=trmdir(copy(nfil));
+ sayline();
+ /* save current contents of buffer */
+ while (!eob(p)) p=unfill(p);
+ inctop[ifno]=mactop;
+ }
+ return(p);
+}
+
+equfrm(a,p1,p2) register char *a,*p1,*p2; {
+ register char c; int flag;
+ c= *p2; *p2='\0';
+ flag=strcmp(a,p1); *p2=c; return(flag==SAME);
+}
+
+char *
+dodef(p) char *p; {/* process '#define' */
+ register char *pin,*psav,*cf;
+ char **pf,**qf; int b,c,params; struct symtab *np;
+ char *oldval,*oldsavch;
+ char *formal[MAXFRM]; /* formal[n] is name of nth formal */
+ char formtxt[BUFSIZ]; /* space for formal names */
+
+ if (savch>sbf+SBSIZE-BUFSIZ) {pperror("too much defining"); return(p);}
+ oldsavch=savch; /* to reclaim space if redefinition */
+ ++flslvl; /* prevent macro expansion during 'define' */
+ p=skipbl(p); pin=inp;
+ if ((toktyp+COFF)[*pin]!=IDENT) {
+ ppwarn("illegal macro name"); while (*inp!='\n') p=skipbl(p); return(p);
+ }
+ np=slookup(pin,p,1);
+ if (oldval=np->value) savch=oldsavch; /* was previously defined */
+ b=1; cf=pin;
+ while (cf<p) {/* update macbit */
+ c= *cf++; xmac1(c,b,|=); b=(b+b)&0xFF;
+ if (cf!=p) xmac2(c,*cf,-1+(cf-pin),|=);
+ else xmac2(c,0,-1+(cf-pin),|=);
+ }
+ params=0; outp=inp=p; p=cotoken(p); pin=inp;
+ if (*pin=='(') {/* with parameters; identify the formals */
+ cf=formtxt; pf=formal;
+ for (;;) {
+ p=skipbl(p); pin=inp;
+ if (*pin=='\n') {
+ --lineno[ifno]; --p; pperror("%s: missing )",np->name); break;
+ }
+ if (*pin==')') break;
+ if (*pin==',') continue;
+ if ((toktyp+COFF)[*pin]!=IDENT) {
+ c= *p; *p='\0'; pperror("bad formal: %s",pin); *p=c;
+ } else if (pf>= &formal[MAXFRM]) {
+ c= *p; *p='\0'; pperror("too many formals: %s",pin); *p=c;
+ } else {
+ *pf++=cf; while (pin<p) *cf++= *pin++; *cf++='\0'; ++params;
+ }
+ }
+ if (params==0) --params; /* #define foo() ... */
+ } else if (*pin=='\n') {--lineno[ifno]; --p;}
+ /* remember beginning of macro body, so that we can
+ /* warn if a redefinition is different from old value.
+ */
+ oldsavch=psav=savch;
+ for (;;) {/* accumulate definition until linefeed */
+ outp=inp=p; p=cotoken(p); pin=inp;
+ if (*pin=='\\' && pin[1]=='\n') {putc('\n',fout); continue;} /* ignore escaped lf */
+ if (*pin=='\n') break;
+ if (params) {/* mark the appearance of formals in the definiton */
+ if ((toktyp+COFF)[*pin]==IDENT) {
+ for (qf=pf; --qf>=formal; ) {
+ if (equfrm(*qf,pin,p)) {
+ *psav++=qf-formal+1; *psav++=WARN; pin=p; break;
+ }
+ }
+ } else if (*pin=='"' || *pin=='\''
+# if gcos
+ || *pin=='`'
+# endif
+ ) {/* inside quotation marks, too */
+ char quoc= *pin;
+ for (*psav++= *pin++; pin<p && *pin!=quoc; ) {
+ while (pin<p && !isid(*pin)) *psav++= *pin++;
+ cf=pin; while (cf<p && isid(*cf)) ++cf;
+ for (qf=pf; --qf>=formal; ) {
+ if (equfrm(*qf,pin,cf)) {
+ *psav++=qf-formal+1; *psav++=WARN; pin=cf; break;
+ }
+ }
+ while (pin<cf) *psav++= *pin++;
+ }
+ }
+ }
+ while (pin<p) *psav++= *pin++;
+ }
+ *psav++=params; *psav++='\0';
+ if ((cf=oldval)!=NULL) {/* redefinition */
+ --cf; /* skip no. of params, which may be zero */
+ while (*--cf); /* go back to the beginning */
+ if (0!=strcmp(++cf,oldsavch)) {/* redefinition different from old */
+ --lineno[ifno]; ppwarn("%s redefined",np->name); ++lineno[ifno];
+ np->value=psav-1;
+ } else psav=oldsavch; /* identical redef.; reclaim space */
+ } else np->value=psav-1;
+ --flslvl; inp=pin; savch=psav; return(p);
+}
+
+#define fasscan() ptrtab=fastab+COFF
+#define sloscan() ptrtab=slotab+COFF
+
+char *
+control(p) register char *p; {/* find and handle preprocessor control lines */
+ register struct symtab *np;
+for (;;) {
+ fasscan(); p=cotoken(p); if (*inp=='\n') ++inp; dump();
+ sloscan(); p=skipbl(p);
+ *--inp=SALT; outp=inp; ++flslvl; np=slookup(inp,p,0); --flslvl;
+ if (np==defloc) {/* define */
+ if (flslvl==0) {p=dodef(p); continue;}
+ } else if (np==incloc) {/* include */
+ if (flslvl==0) {p=doincl(p); continue;}
+ } else if (np==ifnloc) {/* ifndef */
+ ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
+ if (flslvl==0 && np->value==0) ++trulvl;
+ else ++flslvl;
+ } else if (np==ifdloc) {/* ifdef */
+ ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
+ if (flslvl==0 && np->value!=0) ++trulvl;
+ else ++flslvl;
+ } else if (np==eifloc) {/* endif */
+ if (flslvl) {if (--flslvl==0) sayline();}
+ else if (trulvl) --trulvl;
+ else pperror("If-less endif",0);
+ } else if (np==elsloc) {/* else */
+ if (flslvl) {
+ if (--flslvl!=0) ++flslvl;
+ else {++trulvl; sayline();}
+ }
+ else if (trulvl) {++flslvl; --trulvl;}
+ else pperror("If-less else",0);
+ } else if (np==udfloc) {/* undefine */
+ if (flslvl==0) {
+ ++flslvl; p=skipbl(p); slookup(inp,p,DROP); --flslvl;
+ }
+ } else if (np==ifloc) {/* if */
+#if tgp
+ pperror(" IF not implemented, true assumed", 0);
+ if (flslvl==0) ++trulvl; else ++flslvl;
+#else
+ newp=p;
+ if (flslvl==0 && yyparse()) ++trulvl; else ++flslvl;
+ p=newp;
+#endif
+ } else if (np==lneloc) {/* line */
+ if (flslvl==0 && pflag==0) {
+ outp=inp=p; *--outp='#'; while (*inp!='\n') p=cotoken(p);
+ continue;
+ }
+ } else if (*++inp=='\n') outp=inp; /* allows blank line after # */
+ else pperror("undefined control",0);
+ /* flush to lf */
+ ++flslvl; while (*inp!='\n') {outp=inp=p; p=cotoken(p);} --flslvl;
+}
+}
+
+struct symtab *
+stsym(s) register char *s; {
+ char buf[BUFSIZ]; register char *p;
+
+ /* make definition look exactly like end of #define line */
+ /* copy to avoid running off end of world when param list is at end */
+ p=buf; while (*p++= *s++);
+ p=buf; while (isid(*p++)); /* skip first identifier */
+ if (*--p=='=') {*p++=' '; while (*p++);}
+ else {s=" 1"; while (*p++= *s++);}
+ pend=p; *--p='\n';
+ sloscan(); dodef(buf); return(lastsym);
+}
+
+struct symtab *
+ppsym(s) char *s; {/* kluge */
+ register struct symtab *sp;
+ cinit=SALT; *savch++=SALT; sp=stsym(s); --sp->name; cinit=0; return(sp);
+}
+
+/* VARARGS1 */
+pperror(s,x,y) char *s; {
+ if (fnames[ifno][0]) fprintf(stderr,
+# if gcos
+ "*%c* \"%s\", line ", exfail >= 0 ? 'F' : 'W',
+# else
+ "%s: ",
+# endif
+ fnames[ifno]);
+ fprintf(stderr, "%d: ",lineno[ifno]);
+ fprintf(stderr, s, x, y);
+ fprintf(stderr,"\n");
+ ++exfail;
+}
+
+yyerror(s,a,b) char *s; {
+ pperror(s,a,b);
+}
+
+ppwarn(s,x) char *s; {
+ int fail = exfail;
+ exfail = -1;
+ pperror(s,x);
+ exfail = fail;
+}
+
+struct symtab *
+lookup(namep, enterf)
+char *namep;
+{
+ register char *np, *snp;
+ register int c, i; int around;
+ register struct symtab *sp;
+
+ /* namep had better not be too long (currently, <=NCPS chars) */
+ np=namep; around=0; i=cinit;
+ while (c= *np++) i += i+c; c=i; /* c=i for register usage on pdp11 */
+ c %= symsiz; if (c<0) c += symsiz;
+ sp = &stab[c];
+ while (snp=sp->name) {
+ np = namep;
+ while (*snp++ == *np) if (*np++ == '\0') {
+ if (enterf==DROP) {sp->name[0]= DROP; sp->value=0;}
+ return(lastsym=sp);
+ }
+ if (--sp < &stab[0])
+ if (around) {pperror("too many defines", 0); exit(exfail);}
+ else {++around; sp = &stab[symsiz-1];}
+ }
+ if (enterf==1) sp->name=namep;
+ return(lastsym=sp);
+}
+
+struct symtab *
+slookup(p1,p2,enterf) register char *p1,*p2; int enterf;{
+ register char *p3; char c2,c3; struct symtab *np;
+ c2= *p2; *p2='\0'; /* mark end of token */
+ if ((p2-p1)>NCPS) p3=p1+NCPS; else p3=p2;
+ c3= *p3; *p3='\0'; /* truncate to NCPS chars or less */
+ if (enterf==1) p1=copy(p1);
+ np=lookup(p1,enterf); *p3=c3; *p2=c2;
+ if (np->value!=0 && flslvl==0) newp=subst(p2,np);
+ else newp=0;
+ return(np);
+}
+
+char *
+subst(p,sp) register char *p; struct symtab *sp; {
+ static char match[]="%s: argument mismatch";
+ register char *ca,*vp; int params;
+ char *actual[MAXFRM]; /* actual[n] is text of nth actual */
+ char acttxt[BUFSIZ]; /* space for actuals */
+
+ if (0==(vp=sp->value)) return(p);
+ if ((p-macforw)<=macdam) {
+ if (++maclvl>symsiz && !rflag) {
+ pperror("%s: macro recursion",sp->name); return(p);
+ }
+ } else maclvl=0; /* level decreased */
+ macforw=p; macdam=0; /* new target for decrease in level */
+ macnam=sp->name;
+ dump();
+ if (sp==ulnloc) {
+ vp=acttxt; *vp++='\0';
+ sprintf(vp,"%d",lineno[ifno]); while (*vp++);
+ } else if (sp==uflloc) {
+ vp=acttxt; *vp++='\0';
+ sprintf(vp,"\"%s\"",fnames[ifno]); while (*vp++);
+ }
+ if (0!=(params= *--vp&0xFF)) {/* definition calls for params */
+ register char **pa;
+ ca=acttxt; pa=actual;
+ if (params==0xFF) params=1; /* #define foo() ... */
+ sloscan(); ++flslvl; /* no expansion during search for actuals */
+ plvl= -1;
+ do p=skipbl(p); while (*inp=='\n'); /* skip \n too */
+ if (*inp=='(') {
+ maclin=lineno[ifno]; macfil=fnames[ifno];
+ for (plvl=1; plvl!=0; ) {
+ *ca++='\0';
+ for (;;) {
+ outp=inp=p; p=cotoken(p);
+ if (*inp=='(') ++plvl;
+ if (*inp==')' && --plvl==0) {--params; break;}
+ if (plvl==1 && *inp==',') {--params; break;}
+ while (inp<p) *ca++= *inp++;
+ if (ca> &acttxt[BUFSIZ])
+ pperror("%s: actuals too long",sp->name);
+ }
+ if (pa>= &actual[MAXFRM]) ppwarn(match,sp->name);
+ else *pa++=ca;
+ }
+ }
+ if (params!=0) ppwarn(match,sp->name);
+ while (--params>=0) *pa++=""+1; /* null string for missing actuals */
+ --flslvl; fasscan();
+ }
+ for (;;) {/* push definition onto front of input stack */
+ while (!iswarn(*--vp)) {
+ if (bob(p)) {outp=inp=p; p=unfill(p);}
+ *--p= *vp;
+ }
+ if (*vp==warnc) {/* insert actual param */
+ ca=actual[*--vp-1];
+ while (*--ca) {
+ if (bob(p)) {outp=inp=p; p=unfill(p);}
+ *--p= *ca;
+ }
+ } else break;
+ }
+ outp=inp=p;
+ return(p);
+}
+
+
+
+
+char *
+trmdir(s) register char *s; {
+ register char *p = s;
+ while (*p++); --p; while (p>s && *--p!='/');
+# if unix
+ if (p==s) *p++='.';
+# endif
+ *p='\0';
+ return(s);
+}
+
+STATIC char *
+copy(s) register char *s; {
+ register char *old;
+
+ old = savch; while (*savch++ = *s++);
+ return(old);
+}
+
+char *
+strdex(s,c) char *s,c; {
+ while (*s) if (*s++==c) return(--s);
+ return(0);
+}
+
+yywrap(){ return(1); }
+
+main(argc,argv)
+ char *argv[];
+{
+ register int i,c;
+ register char *p;
+ char *tf,**cp2;
+
+# if gcos
+ if (setjmp(env)) return (exfail);
+# endif
+ p="_$ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+ i=0;
+ while (c= *p++) {
+ (fastab+COFF)[c] |= IB|NB|SB; (toktyp+COFF)[c]=IDENT;
+#if scw2
+ /* 53 == 63-10; digits rarely appear in identifiers,
+ /* and can never be the first char of an identifier.
+ /* 11 == 53*53/sizeof(macbit) .
+ */
+ ++i; (t21+COFF)[c]=(53*i)/11; (t22+COFF)[c]=i%11;
+#endif
+ }
+ p="0123456789.";
+ while (c= *p++) {(fastab+COFF)[c] |= NB|SB; (toktyp+COFF)[c]=NUMBR;}
+# if gcos
+ p="\n\"'`/\\";
+# else
+ p="\n\"'/\\";
+# endif
+ while (c= *p++) (fastab+COFF)[c] |= SB;
+# if gcos
+ p="\n\"'`\\";
+# else
+ p="\n\"'\\";
+# endif
+ while (c= *p++) (fastab+COFF)[c] |= QB;
+ p="*\n"; while (c= *p++) (fastab+COFF)[c] |= CB;
+ (fastab+COFF)[warnc] |= WB;
+ (fastab+COFF)['\0'] |= CB|QB|SB|WB;
+ for (i=ALFSIZ; --i>=0; ) slotab[i]=fastab[i]|SB;
+ p=" \t\013\f\r"; /* note no \n; \v not legal for vertical tab? */
+ while (c= *p++) (toktyp+COFF)[c]=BLANK;
+#if scw2
+ for ((t23+COFF)[i=ALFSIZ+7-COFF]=1; --i>=-COFF; )
+ if (((t23+COFF)[i]=(t23+COFF+1)[i]<<1)==0) (t23+COFF)[i]=1;
+#endif
+
+# if unix
+ fnames[ifno=0] = ""; dirnams[0]=dirs[0]=".";
+# endif
+# if ibm
+ fnames[ifno=0] = "";
+# endif
+# if gcos
+ if (inquire(stdin, _TTY)) freopen("*src", "rt", stdin);
+# endif
+# if gimpel || gcos
+ fnames[ifno=0] = (char *)inquire(stdin, _FILENAME);
+ dirnams[0] = dirs[0] = trmdir(copy(fnames[0]));
+# endif
+ for(i=1; i<argc; i++)
+ {
+ switch(argv[i][0])
+ {
+ case '-':
+# if gcos
+ switch(toupper(argv[i][1])) { /* case-independent on GCOS */
+# else
+ switch(argv[i][1]) {
+# endif
+ case 'P': pflag++;
+ case 'E': continue;
+ case 'R': ++rflag; continue;
+ case 'C': passcom++; continue;
+ case 'D':
+ if (predef>prespc+NPREDEF) {
+ pperror("too many -D options, ignoring %s",argv[i]);
+ continue;
+ }
+ /* ignore plain "-D" (no argument) */
+ if (*(argv[i]+2)) *predef++ = argv[i]+2;
+ continue;
+ case 'U':
+ if (prund>punspc+NPREDEF) {
+ pperror("too many -U options, ignoring %s",argv[i]);
+ continue;
+ }
+ *prund++ = argv[i]+2;
+ continue;
+ case 'I':
+ if (nd>8) pperror("excessive -I file (%s) ignored",argv[i]);
+ else dirs[nd++] = argv[i]+2;
+ continue;
+ case '\0': continue;
+ default:
+ pperror("unknown flag %s", argv[i]);
+ continue;
+ }
+ default:
+ if (fin==STDIN) {
+ if (0>(fin=open(argv[i], READ))) {
+ pperror("No source file %s",argv[i]); exit(8);
+ }
+ fnames[ifno]=copy(argv[i]);
+ dirs[0]=dirnams[ifno]=trmdir(copy(argv[i]));
+# ifndef gcos
+/* too dangerous to have file name in same syntactic position
+ be input or output file depending on file redirections,
+ so force output to stdout, willy-nilly
+ [i don't see what the problem is. jfr]
+*/
+ } else if (fout==stdout) {
+ extern char _sobuf[BUFSIZ];
+ if (NULL==(fout=fopen(argv[i], "w"))) {
+ pperror("Can't create %s", argv[i]); exit(8);
+ } else {fclose(stdout); setbuf(fout,_sobuf);}
+# endif
+ } else pperror("extraneous name %s", argv[i]);
+ }
+ }
+
+ fins[ifno]=fin;
+ exfail = 0;
+ /* after user -I files here are the standard include libraries */
+# if unix
+ dirs[nd++] = "/usr/include";
+# endif
+# if gcos
+ dirs[nd++] = "cc/include";
+# endif
+# if ibm
+# ifndef gimpel
+ dirs[nd++] = "BTL$CLIB";
+# endif
+# endif
+# ifdef gimpel
+ dirs[nd++] = intss() ? "SYS3.C." : "" ;
+# endif
+ /* dirs[nd++] = "/compool"; */
+ dirs[nd++] = 0;
+ defloc=ppsym("define");
+ udfloc=ppsym("undef");
+ incloc=ppsym("include");
+ elsloc=ppsym("else");
+ eifloc=ppsym("endif");
+ ifdloc=ppsym("ifdef");
+ ifnloc=ppsym("ifndef");
+ ifloc=ppsym("if");
+ lneloc=ppsym("line");
+ for (i=sizeof(macbit)/sizeof(macbit[0]); --i>=0; ) macbit[i]=0;
+# if unix
+ ysysloc=stsym("unix");
+# endif
+# if gcos
+ ysysloc=stsym ("gcos");
+# endif
+# if ibm
+ ysysloc=stsym ("ibm");
+# endif
+# if pdp11
+ varloc=stsym("pdp11");
+# endif
+# if vax
+ varloc=stsym("vax");
+# endif
+# if interdata
+ varloc=stsym ("interdata");
+# endif
+# if tss
+ varloc=stsym ("tss");
+# endif
+# if os
+ varloc=stsym ("os");
+# endif
+# if mert
+ varloc=stsym ("mert");
+# endif
+ ulnloc=stsym ("__LINE__");
+ uflloc=stsym ("__FILE__");
+
+ tf=fnames[ifno]; fnames[ifno]="command line"; lineno[ifno]=1;
+ cp2=prespc;
+ while (cp2<predef) stsym(*cp2++);
+ cp2=punspc;
+ while (cp2<prund) {
+ if (p=strdex(*cp2, '=')) *p++='\0';
+ lookup(*cp2++, DROP);
+ }
+ fnames[ifno]=tf;
+ pbeg=buffer+NCPS; pbuf=pbeg+BUFSIZ; pend=pbuf+BUFSIZ;
+
+ trulvl = 0; flslvl = 0;
+ lineno[0] = 1; sayline();
+ outp=inp=pend;
+ control(pend);
+ return (exfail);
+}
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