UNIX 7th Ed. - /usr/src/cmd/cpp/cpp.c

   1: #
   2: # include "stdio.h"
   3: /* C command
   4: /* written by John F. Reiser
   5: /* July/August 1978
   6: */
   7: 
   8: #define STATIC
   9: 
  10: #define STDIN 0
  11: #define STDOUT 1
  12: #define STDERR 2
  13: #define READ 0
  14: #define WRITE 1
  15: #define SALT '#'
  16: #ifndef BUFSIZ
  17: #define BUFSIZ 512
  18: #endif
  19: 
  20: char *pbeg,*pbuf,*pend;
  21: char *outp,*inp;
  22: char *newp;
  23: char cinit;
  24: 
  25: /* some code depends on whether characters are sign or zero extended */
  26: /*	#if '\377' < 0		not used here, old cpp doesn't understand */
  27: #if pdp11 | vax
  28: #define COFF 128
  29: #else
  30: #define COFF 0
  31: #endif
  32: 
  33: # if gcos
  34: #define ALFSIZ 512  /* alphabet size */
  35: # else
  36: #define ALFSIZ 256  /* alphabet size */
  37: # endif
  38: char macbit[ALFSIZ+11];
  39: char toktyp[ALFSIZ];
  40: #define BLANK 1
  41: #define IDENT 2
  42: #define NUMBR 3
  43: 
  44: /* a superimposed code is used to reduce the number of calls to the
  45: /* symbol table lookup routine.  (if the kth character of an identifier
  46: /* is 'a' and there are no macro names whose kth character is 'a'
  47: /* then the identifier cannot be a macro name, hence there is no need
  48: /* to look in the symbol table.)  'scw1' enables the test based on
  49: /* single characters and their position in the identifier.  'scw2'
  50: /* enables the test based on adjacent pairs of characters and their
  51: /* position in the identifier.  scw1 typically costs 1 indexed fetch,
  52: /* an AND, and a jump per character of identifier, until the identifier
  53: /* is known as a non-macro name or until the end of the identifier.
  54: /* scw1 is inexpensive.  scw2 typically costs 4 indexed fetches,
  55: /* an add, an AND, and a jump per character of identifier, but it is also
  56: /* slightly more effective at reducing symbol table searches.
  57: /* scw2 usually costs too much because the symbol table search is
  58: /* usually short; but if symbol table search should become expensive,
  59: /* the code is here.
  60: /* using both scw1 and scw2 is of dubious value.
  61: */
  62: #define scw1 1
  63: #define scw2 0
  64: 
  65: #if scw2
  66: char t21[ALFSIZ],t22[ALFSIZ],t23[ALFSIZ+8];
  67: #endif
  68: 
  69: #if scw1
  70: #define b0 1
  71: #define b1 2
  72: #define b2 4
  73: #define b3 8
  74: #define b4 16
  75: #define b5 32
  76: #define b6 64
  77: #define b7 128
  78: #endif
  79: 
  80: #define IB 1
  81: #define SB 2
  82: #define NB 4
  83: #define CB 8
  84: #define QB 16
  85: #define WB 32
  86: char fastab[ALFSIZ];
  87: char slotab[ALFSIZ];
  88: char *ptrtab;
  89: #define isslo (ptrtab==(slotab+COFF))
  90: #define isid(a)  ((fastab+COFF)[a]&IB)
  91: #define isspc(a) (ptrtab[a]&SB)
  92: #define isnum(a) ((fastab+COFF)[a]&NB)
  93: #define iscom(a) ((fastab+COFF)[a]&CB)
  94: #define isquo(a) ((fastab+COFF)[a]&QB)
  95: #define iswarn(a) ((fastab+COFF)[a]&WB)
  96: 
  97: #define eob(a) ((a)>=pend)
  98: #define bob(a) (pbeg>=(a))
  99: 
 100: char buffer[8+BUFSIZ+BUFSIZ+8];
 101: 
 102: # define SBSIZE 12000
 103: char    sbf[SBSIZE];
 104: char    *savch  = sbf;
 105: 
 106: # define DROP 0xFE  /* special character not legal ASCII or EBCDIC */
 107: # define WARN DROP
 108: # define SAME 0
 109: # define MAXINC 10
 110: # define MAXFRE 14  /* max buffers of macro pushback */
 111: # define MAXFRM 31  /* max number of formals/actuals to a macro */
 112: 
 113: static char warnc = WARN;
 114: 
 115: int mactop,fretop;
 116: char *instack[MAXFRE],*bufstack[MAXFRE],*endbuf[MAXFRE];
 117: 
 118: int plvl;   /* parenthesis level during scan for macro actuals */
 119: int maclin; /* line number of macro call requiring actuals */
 120: char *macfil;   /* file name of macro call requiring actuals */
 121: char *macnam;   /* name of macro requiring actuals */
 122: int maclvl; /* # calls since last decrease in nesting level */
 123: char *macforw;  /* pointer which must be exceeded to decrease nesting level */
 124: int macdam; /* offset to macforw due to buffer shifting */
 125: 
 126: #if tgp
 127: int tgpscan;    /* flag for dump(); */
 128: #endif
 129: 
 130: STATIC  int inctop[MAXINC];
 131: STATIC  char    *fnames[MAXINC];
 132: STATIC  char    *dirnams[MAXINC];   /* actual directory of #include files */
 133: STATIC  int fins[MAXINC];
 134: STATIC  int lineno[MAXINC];
 135: 
 136: STATIC  char    *dirs[10];  /* -I and <> directories */
 137: char *strdex(), *copy(), *subst(), *trmdir();
 138: struct symtab *stsym();
 139: STATIC  int fin = STDIN;
 140: STATIC  FILE    *fout   = stdout;
 141: STATIC  int nd  = 1;
 142: STATIC  int pflag;  /* don't put out lines "# 12 foo.c" */
 143: STATIC  int passcom;    /* don't delete comments */
 144: STATIC  int rflag;  /* allow macro recursion */
 145: STATIC  int ifno;
 146: # define NPREDEF 20
 147: STATIC  char *prespc[NPREDEF];
 148: STATIC  char **predef = prespc;
 149: STATIC  char *punspc[NPREDEF];
 150: STATIC  char **prund = punspc;
 151: STATIC  int exfail;
 152: struct symtab {
 153:     char    *name;
 154:     char    *value;
 155: } *lastsym, *lookup(), *slookup();
 156: 
 157: # if gcos
 158: #include <setjmp.h>
 159: static jmp_buf env;
 160: # define main   mainpp
 161: # undef exit
 162: # define exit(S)    longjmp(env, 1)
 163: # define open(S,D)  fileno(fopen(S, "r"))
 164: # define close(F)   fclose(_f[F])
 165: extern FILE *_f[];
 166: # define symsiz 500
 167: # else
 168: # define symsiz 400
 169: # endif
 170: STATIC  struct symtab stab[symsiz];
 171: 
 172: STATIC  struct symtab *defloc;
 173: STATIC  struct symtab *udfloc;
 174: STATIC  struct symtab *incloc;
 175: STATIC  struct symtab *ifloc;
 176: STATIC  struct symtab *elsloc;
 177: STATIC  struct symtab *eifloc;
 178: STATIC  struct symtab *ifdloc;
 179: STATIC  struct symtab *ifnloc;
 180: STATIC  struct symtab *ysysloc;
 181: STATIC  struct symtab *varloc;
 182: STATIC  struct symtab *lneloc;
 183: STATIC  struct symtab *ulnloc;
 184: STATIC  struct symtab *uflloc;
 185: STATIC  int trulvl;
 186: STATIC  int flslvl;
 187: 
 188: sayline() {
 189:     if (pflag==0) fprintf(fout,"# %d \"%s\"\n", lineno[ifno], fnames[ifno]);
 190: }
 191: 
 192: /* data structure guide
 193: /*
 194: /* most of the scanning takes place in the buffer:
 195: /*
 196: /*  (low address)                                             (high address)
 197: /*  pbeg                           pbuf                                 pend
 198: /*  |      <-- BUFSIZ chars -->      |         <-- BUFSIZ chars -->        |
 199: /*  _______________________________________________________________________
 200: /* |_______________________________________________________________________|
 201: /*          |               |               |
 202: /*          |<-- waiting -->|               |<-- waiting -->
 203: /*          |    to be      |<-- current -->|    to be
 204: /*          |    written    |    token      |    scanned
 205: /*          |               |               |
 206: /*          outp            inp             p
 207: /*
 208: /*  *outp   first char not yet written to output file
 209: /*  *inp    first char of current token
 210: /*  *p      first char not yet scanned
 211: /*
 212: /* macro expansion: write from *outp to *inp (chars waiting to be written),
 213: /* ignore from *inp to *p (chars of the macro call), place generated
 214: /* characters in front of *p (in reverse order), update pointers,
 215: /* resume scanning.
 216: /*
 217: /* symbol table pointers point to just beyond the end of macro definitions;
 218: /* the first preceding character is the number of formal parameters.
 219: /* the appearance of a formal in the body of a definition is marked by
 220: /* 2 chars: the char WARN, and a char containing the parameter number.
 221: /* the first char of a definition is preceded by a zero character.
 222: /*
 223: /* when macro expansion attempts to back up over the beginning of the
 224: /* buffer, some characters preceding *pend are saved in a side buffer,
 225: /* the address of the side buffer is put on 'instack', and the rest
 226: /* of the main buffer is moved to the right.  the end of the saved buffer
 227: /* is kept in 'endbuf' since there may be nulls in the saved buffer.
 228: /*
 229: /* similar action is taken when an 'include' statement is processed,
 230: /* except that the main buffer must be completely emptied.  the array
 231: /* element 'inctop[ifno]' records the last side buffer saved when
 232: /* file 'ifno' was included.  these buffers remain dormant while
 233: /* the file is being read, and are reactivated at end-of-file.
 234: /*
 235: /* instack[0 : mactop] holds the addresses of all pending side buffers.
 236: /* instack[inctop[ifno]+1 : mactop-1] holds the addresses of the side
 237: /* buffers which are "live"; the side buffers instack[0 : inctop[ifno]]
 238: /* are dormant, waiting for end-of-file on the current file.
 239: /*
 240: /* space for side buffers is obtained from 'savch' and is never returned.
 241: /* bufstack[0:fretop-1] holds addresses of side buffers which
 242: /* are available for use.
 243: */
 244: 
 245: dump() {
 246: /* write part of buffer which lies between  outp  and  inp .
 247: /* this should be a direct call to 'write', but the system slows to a crawl
 248: /* if it has to do an unaligned copy.  thus we buffer.  this silly loop
 249: /* is 15% of the total time, thus even the 'putc' macro is too slow.
 250: */
 251:     register char *p1,*p2; register FILE *f;
 252:     if ((p1=outp)==inp || flslvl!=0) return;
 253: #if tgp
 254: #define MAXOUT 80
 255:     if (!tgpscan) {/* scan again to insure <= MAXOUT chars between linefeeds */
 256:         register char c,*pblank; char savc,stopc,brk;
 257:         tgpscan=1; brk=stopc=pblank=0; p2=inp; savc= *p2; *p2='\0';
 258:         while (c= *p1++) {
 259:             if (c=='\\') c= *p1++;
 260:             if (stopc==c) stopc=0;
 261:             else if (c=='"' || c=='\'') stopc=c;
 262:             if (p1-outp>MAXOUT && pblank!=0) {
 263:                 *pblank++='\n'; inp=pblank; dump(); brk=1; pblank=0;
 264:             }
 265:             if (c==' ' && stopc==0) pblank=p1-1;
 266:         }
 267:         if (brk) sayline();
 268:         *p2=savc; inp=p2; p1=outp; tgpscan=0;
 269:     }
 270: #endif
 271:     f=fout;
 272: # if gcos
 273: /* filter out "$ program c" card if first line of input */
 274: /* gmatch is a simple pattern matcher in the GCOS Standard Library */
 275: {   static int gmfirst = 0;
 276:     if (!gmfirst) {
 277:         ++gmfirst;
 278:         if (gmatch(p1, "^$*program[ \t]*c*"))
 279:             p1 = strdex(p1, '\n');
 280:     }
 281: }
 282: # endif
 283:     while (p1<inp) putc(*p1++,f);
 284:     outp=p1;
 285: }
 286: 
 287: char *
 288: refill(p) register char *p; {
 289: /* dump buffer.  save chars from inp to p.  read into buffer at pbuf,
 290: /* contiguous with p.  update pointers, return new p.
 291: */
 292:     register char *np,*op; register int ninbuf;
 293:     dump(); np=pbuf-(p-inp); op=inp;
 294:     if (bob(np+1)) {pperror("token too long"); np=pbeg; p=inp+BUFSIZ;}
 295:     macdam += np-inp; outp=inp=np;
 296:     while (op<p) *np++= *op++;
 297:     p=np;
 298:     for (;;) {
 299:         if (mactop>inctop[ifno]) {/* retrieve hunk of pushed-back macro text */
 300:             op=instack[--mactop]; np=pbuf;
 301:             do {while (*np++= *op++);} while (op<endbuf[mactop]); pend=np-1;
 302:             /* make buffer space avail for 'include' processing */
 303:             if (fretop<MAXFRE) bufstack[fretop++]=instack[mactop];
 304:             return(p);
 305:         } else {/* get more text from file(s) */
 306:             maclvl=0;
 307:             if (0<(ninbuf=read(fin,pbuf,BUFSIZ))) {
 308:                 pend=pbuf+ninbuf; *pend='\0';
 309:                 return(p);
 310:             }
 311:             /* end of #include file */
 312:             if (ifno==0) {/* end of input */
 313:                 if (plvl!=0) {
 314:                     int n=plvl,tlin=lineno[ifno]; char *tfil=fnames[ifno];
 315:                     lineno[ifno]=maclin; fnames[ifno]=macfil;
 316:                     pperror("%s: unterminated macro call",macnam);
 317:                     lineno[ifno]=tlin; fnames[ifno]=tfil;
 318:                     np=p; *np++='\n';   /* shut off unterminated quoted string */
 319:                     while (--n>=0) *np++=')';   /* supply missing parens */
 320:                     pend=np; *np='\0'; if (plvl<0) plvl=0;
 321:                     return(p);
 322:                 }
 323:                 inp=p; dump(); exit(exfail);
 324:             }
 325:             close(fin); fin=fins[--ifno]; dirs[0]=dirnams[ifno]; sayline();
 326:         }
 327:     }
 328: }
 329: 
 330: #define BEG 0
 331: #define LF 1
 332: 
 333: char *
 334: cotoken(p) register char *p; {
 335:     register int c,i; char quoc;
 336:     static int state = BEG;
 337: 
 338:     if (state!=BEG) goto prevlf;
 339: for (;;) {
 340: again:
 341:     while (!isspc(*p++));
 342:     switch (*(inp=p-1)) {
 343:     case 0: {
 344:         if (eob(--p)) {p=refill(p); goto again;}
 345:         else ++p; /* ignore null byte */
 346:     } break;
 347:     case '|': case '&': for (;;) {/* sloscan only */
 348:         if (*p++== *inp) break;
 349:         if (eob(--p)) p=refill(p);
 350:         else break;
 351:     } break;
 352:     case '=': case '!': for (;;) {/* sloscan only */
 353:         if (*p++=='=') break;
 354:         if (eob(--p)) p=refill(p);
 355:         else break;
 356:     } break;
 357:     case '<': case '>': for (;;) {/* sloscan only */
 358:         if (*p++=='=' || p[-2]==p[-1]) break;
 359:         if (eob(--p)) p=refill(p);
 360:         else break;
 361:     } break;
 362:     case '\\': for (;;) {
 363:         if (*p++=='\n') {++lineno[ifno]; break;}
 364:         if (eob(--p)) p=refill(p);
 365:         else {++p; break;}
 366:     } break;
 367:     case '/': for (;;) {
 368:         if (*p++=='*') {/* comment */
 369:             if (!passcom) {inp=p-2; dump(); ++flslvl;}
 370:             for (;;) {
 371:                 while (!iscom(*p++));
 372:                 if (p[-1]=='*') for (;;) {
 373:                     if (*p++=='/') goto endcom;
 374:                     if (eob(--p)) {
 375:                         if (!passcom) {inp=p; p=refill(p);}
 376:                         else if ((p-inp)>=BUFSIZ) {/* split long comment */
 377:                             inp=p; p=refill(p); /* last char written is '*' */
 378:                             putc('/',fout); /* terminate first part */
 379:                             /* and fake start of 2nd */
 380:                             outp=inp=p-=3; *p++='/'; *p++='*'; *p++='*';
 381:                         } else p=refill(p);
 382:                     } else break;
 383:                 } else if (p[-1]=='\n') {
 384:                     ++lineno[ifno]; if (!passcom) putc('\n',fout);
 385:                 } else if (eob(--p)) {
 386:                     if (!passcom) {inp=p; p=refill(p);}
 387:                     else if ((p-inp)>=BUFSIZ) {/* split long comment */
 388:                         inp=p; p=refill(p);
 389:                         putc('*',fout); putc('/',fout);
 390:                         outp=inp=p-=2; *p++='/'; *p++='*';
 391:                     } else p=refill(p);
 392:                 } else ++p; /* ignore null byte */
 393:             }
 394:         endcom:
 395:             if (!passcom) {outp=inp=p; --flslvl; goto again;}
 396:             break;
 397:         }
 398:         if (eob(--p)) p=refill(p);
 399:         else break;
 400:     } break;
 401: # if gcos
 402:     case '`':
 403: # endif
 404:     case '"': case '\'': {
 405:         quoc=p[-1];
 406:         for (;;) {
 407:             while (!isquo(*p++));
 408:             if (p[-1]==quoc) break;
 409:             if (p[-1]=='\n') {--p; break;} /* bare \n terminates quotation */
 410:             if (p[-1]=='\\') for (;;) {
 411:                 if (*p++=='\n') {++lineno[ifno]; break;} /* escaped \n ignored */
 412:                 if (eob(--p)) p=refill(p);
 413:                 else {++p; break;}
 414:             } else if (eob(--p)) p=refill(p);
 415:             else ++p;   /* it was a different quote character */
 416:         }
 417:     } break;
 418:     case '\n': {
 419:         ++lineno[ifno]; if (isslo) {state=LF; return(p);}
 420: prevlf:
 421:         state=BEG;
 422:         for (;;) {
 423:             if (*p++=='#') return(p);
 424:             if (eob(inp= --p)) p=refill(p);
 425:             else goto again;
 426:         }
 427:     } break;
 428:     case '0': case '1': case '2': case '3': case '4':
 429:     case '5': case '6': case '7': case '8': case '9':
 430:     for (;;) {
 431:         while (isnum(*p++));
 432:         if (eob(--p)) p=refill(p);
 433:         else break;
 434:     } break;
 435:     case 'A': case 'B': case 'C': case 'D': case 'E':
 436:     case 'F': case 'G': case 'H': case 'I': case 'J':
 437:     case 'K': case 'L': case 'M': case 'N': case 'O':
 438:     case 'P': case 'Q': case 'R': case 'S': case 'T':
 439:     case 'U': case 'V': case 'W': case 'X': case 'Y':
 440:     case 'Z': case '_':
 441:     case 'a': case 'b': case 'c': case 'd': case 'e':
 442:     case 'f': case 'g': case 'h': case 'i': case 'j':
 443:     case 'k': case 'l': case 'm': case 'n': case 'o':
 444:     case 'p': case 'q': case 'r': case 's': case 't':
 445:     case 'u': case 'v': case 'w': case 'x': case 'y':
 446:     case 'z':
 447: #if scw1
 448: #define tmac1(c,bit) if (!xmac1(c,bit,&)) goto nomac
 449: #define xmac1(c,bit,op) ((macbit+COFF)[c] op (bit))
 450: #else
 451: #define tmac1(c,bit)
 452: #define xmac1(c,bit,op)
 453: #endif
 454: 
 455: #if scw2
 456: #define tmac2(c0,c1,cpos) if (!xmac2(c0,c1,cpos,&)) goto nomac
 457: #define xmac2(c0,c1,cpos,op)\
 458:     ((macbit+COFF)[(t21+COFF)[c0]+(t22+COFF)[c1]] op (t23+COFF+cpos)[c0])
 459: #else
 460: #define tmac2(c0,c1,cpos)
 461: #define xmac2(c0,c1,cpos,op)
 462: #endif
 463: 
 464:     if (flslvl) goto nomac;
 465:     for (;;) {
 466:         c= p[-1];                          tmac1(c,b0);
 467:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b1); tmac2(c,i,0);
 468:         c= *p++; if (!isid(c)) goto endid; tmac1(c,b2); tmac2(i,c,1);
 469:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b3); tmac2(c,i,2);
 470:         c= *p++; if (!isid(c)) goto endid; tmac1(c,b4); tmac2(i,c,3);
 471:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b5); tmac2(c,i,4);
 472:         c= *p++; if (!isid(c)) goto endid; tmac1(c,b6); tmac2(i,c,5);
 473:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b7); tmac2(c,i,6);
 474:                                                         tmac2(i,0,7);
 475:         while (isid(*p++));
 476:         if (eob(--p)) {refill(p); p=inp+1; continue;}
 477:         goto lokid;
 478:     endid:
 479:         if (eob(--p)) {refill(p); p=inp+1; continue;}
 480:         tmac2(p[-1],0,-1+(p-inp));
 481:     lokid:
 482:         slookup(inp,p,0); if (newp) {p=newp; goto again;}
 483:         else break;
 484:     nomac:
 485:         while (isid(*p++));
 486:         if (eob(--p)) {p=refill(p); goto nomac;}
 487:         else break;
 488:     } break;
 489:     } /* end of switch */
 490: 
 491:     if (isslo) return(p);
 492: } /* end of infinite loop */
 493: }
 494: 
 495: char *
 496: skipbl(p) register char *p; {/* get next non-blank token */
 497:     do {outp=inp=p; p=cotoken(p);} while ((toktyp+COFF)[*inp]==BLANK);
 498:     return(p);
 499: }
 500: 
 501: char *
 502: unfill(p) register char *p; {
 503: /* take <= BUFSIZ chars from right end of buffer and put them on instack .
 504: /* slide rest of buffer to the right, update pointers, return new p.
 505: */
 506:     register char *np,*op; register int d;
 507:     if (mactop>=MAXFRE) {
 508:         pperror("%s: too much pushback",macnam);
 509:         p=inp=pend; dump(); /* begin flushing pushback */
 510:         while (mactop>inctop[ifno]) {p=refill(p); p=inp=pend; dump();}
 511:     }
 512:     if (fretop>0) np=bufstack[--fretop];
 513:     else {
 514:         np=savch; savch+=BUFSIZ;
 515:         if (savch>=sbf+SBSIZE) {pperror("no space"); exit(exfail);}
 516:         *savch++='\0';
 517:     }
 518:     instack[mactop]=np; op=pend-BUFSIZ; if (op<p) op=p;
 519:     for (;;) {while (*np++= *op++); if (eob(op)) break;} /* out with old */
 520:     endbuf[mactop++]=np;    /* mark end of saved text */
 521:     np=pbuf+BUFSIZ; op=pend-BUFSIZ; pend=np; if (op<p) op=p;
 522:     while (outp<op) *--np= *--op; /* slide over new */
 523:     if (bob(np)) pperror("token too long");
 524:     d=np-outp; outp+=d; inp+=d; macdam+=d; return(p+d);
 525: }
 526: 
 527: char *
 528: doincl(p) register char *p; {
 529:     int filok,inctype;
 530:     register char *cp; char **dirp,*nfil; char filname[BUFSIZ];
 531: 
 532:     p=skipbl(p); cp=filname;
 533:     if (*inp++=='<') {/* special <> syntax */
 534:         inctype=1;
 535:         for (;;) {
 536:             outp=inp=p; p=cotoken(p);
 537:             if (*inp=='\n') {--p; *cp='\0'; break;}
 538:             if (*inp=='>') {      *cp='\0'; break;}
 539: # ifdef gimpel
 540:             if (*inp=='.' && !intss()) *inp='#';
 541: # endif
 542:             while (inp<p) *cp++= *inp++;
 543:         }
 544:     } else if (inp[-1]=='"') {/* regular "" syntax */
 545:         inctype=0;
 546: # ifdef gimpel
 547:         while (inp<p) {if (*inp=='.' && !intss()) *inp='#'; *cp++= *inp++;}
 548: # else
 549:         while (inp<p) *cp++= *inp++;
 550: # endif
 551:         if (*--cp=='"') *cp='\0';
 552:     } else {pperror("bad include syntax",0); inctype=2;}
 553:     /* flush current file to \n , then write \n */
 554:     ++flslvl; do {outp=inp=p; p=cotoken(p);} while (*inp!='\n'); --flslvl;
 555:     inp=p; dump(); if (inctype==2) return(p);
 556:     /* look for included file */
 557:     if (ifno+1 >=MAXINC) {
 558:         pperror("Unreasonable include nesting",0); return(p);
 559:     }
 560:     if((nfil=savch)>sbf+SBSIZE-BUFSIZ) {pperror("no space"); exit(exfail);}
 561:     filok=0;
 562:     for (dirp=dirs+inctype; *dirp; ++dirp) {
 563:         if (
 564: # if gcos
 565:             strdex(filname, '/')
 566: # else
 567:             filname[0]=='/'
 568: # endif
 569:                 || **dirp=='\0') strcpy(nfil,filname);
 570:         else {
 571:             strcpy(nfil,*dirp);
 572: # if unix || gcos
 573:             strcat(nfil,"/");
 574: # endif
 575: #ifdef ibm
 576: #ifndef gimpel
 577:             strcat(nfil,".");
 578: #endif
 579: #endif
 580:             strcat(nfil,filname);
 581:         }
 582:         if (0<(fins[ifno+1]=open(nfil,READ))) {
 583:             filok=1; fin=fins[++ifno]; break;
 584:         }
 585:     }
 586:     if (filok==0) pperror("Can't find include file %s",filname);
 587:     else {
 588:         lineno[ifno]=1; fnames[ifno]=cp=nfil; while (*cp++); savch=cp;
 589:         dirnams[ifno]=dirs[0]=trmdir(copy(nfil));
 590:         sayline();
 591:         /* save current contents of buffer */
 592:         while (!eob(p)) p=unfill(p);
 593:         inctop[ifno]=mactop;
 594:     }
 595:     return(p);
 596: }
 597: 
 598: equfrm(a,p1,p2) register char *a,*p1,*p2; {
 599:     register char c; int flag;
 600:     c= *p2; *p2='\0';
 601:     flag=strcmp(a,p1); *p2=c; return(flag==SAME);
 602: }
 603: 
 604: char *
 605: dodef(p) char *p; {/* process '#define' */
 606:     register char *pin,*psav,*cf;
 607:     char **pf,**qf; int b,c,params; struct symtab *np;
 608:     char *oldval,*oldsavch;
 609:     char *formal[MAXFRM]; /* formal[n] is name of nth formal */
 610:     char formtxt[BUFSIZ]; /* space for formal names */
 611: 
 612:     if (savch>sbf+SBSIZE-BUFSIZ) {pperror("too much defining"); return(p);}
 613:     oldsavch=savch; /* to reclaim space if redefinition */
 614:     ++flslvl; /* prevent macro expansion during 'define' */
 615:     p=skipbl(p); pin=inp;
 616:     if ((toktyp+COFF)[*pin]!=IDENT) {
 617:         ppwarn("illegal macro name"); while (*inp!='\n') p=skipbl(p); return(p);
 618:     }
 619:     np=slookup(pin,p,1);
 620:     if (oldval=np->value) savch=oldsavch;   /* was previously defined */
 621:     b=1; cf=pin;
 622:     while (cf<p) {/* update macbit */
 623:         c= *cf++; xmac1(c,b,|=); b=(b+b)&0xFF;
 624:         if (cf!=p) xmac2(c,*cf,-1+(cf-pin),|=);
 625:         else xmac2(c,0,-1+(cf-pin),|=);
 626:     }
 627:     params=0; outp=inp=p; p=cotoken(p); pin=inp;
 628:     if (*pin=='(') {/* with parameters; identify the formals */
 629:         cf=formtxt; pf=formal;
 630:         for (;;) {
 631:             p=skipbl(p); pin=inp;
 632:             if (*pin=='\n') {
 633:                 --lineno[ifno]; --p; pperror("%s: missing )",np->name); break;
 634:             }
 635:             if (*pin==')') break;
 636:             if (*pin==',') continue;
 637:             if ((toktyp+COFF)[*pin]!=IDENT) {
 638:                 c= *p; *p='\0'; pperror("bad formal: %s",pin); *p=c;
 639:             } else if (pf>= &formal[MAXFRM]) {
 640:                 c= *p; *p='\0'; pperror("too many formals: %s",pin); *p=c;
 641:             } else {
 642:                 *pf++=cf; while (pin<p) *cf++= *pin++; *cf++='\0'; ++params;
 643:             }
 644:         }
 645:         if (params==0) --params; /* #define foo() ... */
 646:     } else if (*pin=='\n') {--lineno[ifno]; --p;}
 647:     /* remember beginning of macro body, so that we can
 648: 	/* warn if a redefinition is different from old value.
 649: 	*/
 650:     oldsavch=psav=savch;
 651:     for (;;) {/* accumulate definition until linefeed */
 652:         outp=inp=p; p=cotoken(p); pin=inp;
 653:         if (*pin=='\\' && pin[1]=='\n') continue;   /* ignore escaped lf */
 654:         if (*pin=='\n') break;
 655:         if (params) {/* mark the appearance of formals in the definiton */
 656:             if ((toktyp+COFF)[*pin]==IDENT) {
 657:                 for (qf=pf; --qf>=formal; ) {
 658:                     if (equfrm(*qf,pin,p)) {
 659:                         *psav++=qf-formal+1; *psav++=WARN; pin=p; break;
 660:                     }
 661:                 }
 662:             } else if (*pin=='"' || *pin=='\''
 663: # if gcos
 664:                     || *pin=='`'
 665: # endif
 666:                         ) {/* inside quotation marks, too */
 667:                 char quoc= *pin;
 668:                 for (*psav++= *pin++; pin<p && *pin!=quoc; ) {
 669:                     while (pin<p && !isid(*pin)) *psav++= *pin++;
 670:                     cf=pin; while (cf<p && isid(*cf)) ++cf;
 671:                     for (qf=pf; --qf>=formal; ) {
 672:                         if (equfrm(*qf,pin,cf)) {
 673:                             *psav++=qf-formal+1; *psav++=WARN; pin=cf; break;
 674:                         }
 675:                     }
 676:                     while (pin<cf) *psav++= *pin++;
 677:                 }
 678:             }
 679:         }
 680:         while (pin<p) *psav++= *pin++;
 681:     }
 682:     *psav++=params; *psav++='\0';
 683:     if ((cf=oldval)!=NULL) {/* redefinition */
 684:         --cf;   /* skip no. of params, which may be zero */
 685:         while (*--cf);  /* go back to the beginning */
 686:         if (0!=strcmp(++cf,oldsavch)) {/* redefinition different from old */
 687:             --lineno[ifno]; ppwarn("%s redefined",np->name); ++lineno[ifno];
 688:             np->value=psav-1;
 689:         } else psav=oldsavch; /* identical redef.; reclaim space */
 690:     } else np->value=psav-1;
 691:     --flslvl; inp=pin; savch=psav; return(p);
 692: }
 693: 
 694: #define fasscan() ptrtab=fastab+COFF
 695: #define sloscan() ptrtab=slotab+COFF
 696: 
 697: char *
 698: control(p) register char *p; {/* find and handle preprocessor control lines */
 699:     register struct symtab *np;
 700: for (;;) {
 701:     fasscan(); p=cotoken(p); if (*inp=='\n') ++inp; dump();
 702:     sloscan(); p=skipbl(p);
 703:     *--inp=SALT; outp=inp; ++flslvl; np=slookup(inp,p,0); --flslvl;
 704:     if (np==defloc) {/* define */
 705:         if (flslvl==0) {p=dodef(p); continue;}
 706:     } else if (np==incloc) {/* include */
 707:         if (flslvl==0) {p=doincl(p); continue;}
 708:     } else if (np==ifnloc) {/* ifndef */
 709:         ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
 710:         if (flslvl==0 && np->value==0) ++trulvl;
 711:         else ++flslvl;
 712:     } else if (np==ifdloc) {/* ifdef */
 713:         ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
 714:         if (flslvl==0 && np->value!=0) ++trulvl;
 715:         else ++flslvl;
 716:     } else if (np==eifloc) {/* endif */
 717:         if (flslvl) {if (--flslvl==0) sayline();}
 718:         else if (trulvl) --trulvl;
 719:         else pperror("If-less endif",0);
 720:     } else if (np==elsloc) {/* else */
 721:         if (flslvl) {
 722:             if (--flslvl!=0) ++flslvl;
 723:             else {++trulvl; sayline();}
 724:         }
 725:         else if (trulvl) {++flslvl; --trulvl;}
 726:         else pperror("If-less else",0);
 727:     } else if (np==udfloc) {/* undefine */
 728:         if (flslvl==0) {
 729:             ++flslvl; p=skipbl(p); slookup(inp,p,DROP); --flslvl;
 730:         }
 731:     } else if (np==ifloc) {/* if */
 732: #if tgp
 733:         pperror(" IF not implemented, true assumed", 0);
 734:         if (flslvl==0) ++trulvl; else ++flslvl;
 735: #else
 736:         newp=p;
 737:         if (flslvl==0 && yyparse()) ++trulvl; else ++flslvl;
 738:         p=newp;
 739: #endif
 740:     } else if (np==lneloc) {/* line */
 741:         if (flslvl==0 && pflag==0) {
 742:             outp=inp=p; *--outp='#'; while (*inp!='\n') p=cotoken(p);
 743:             continue;
 744:         }
 745:     } else if (*++inp=='\n') outp=inp;  /* allows blank line after # */
 746:     else pperror("undefined control",0);
 747:     /* flush to lf */
 748:     ++flslvl; while (*inp!='\n') {outp=inp=p; p=cotoken(p);} --flslvl;
 749: }
 750: }
 751: 
 752: struct symtab *
 753: stsym(s) register char *s; {
 754:     char buf[BUFSIZ]; register char *p;
 755: 
 756:     /* make definition look exactly like end of #define line */
 757:     /* copy to avoid running off end of world when param list is at end */
 758:     p=buf; while (*p++= *s++);
 759:     p=buf; while (isid(*p++)); /* skip first identifier */
 760:     if (*--p=='=') {*p++=' '; while (*p++);}
 761:     else {s=" 1"; while (*p++= *s++);}
 762:     pend=p; *--p='\n';
 763:     sloscan(); dodef(buf); return(lastsym);
 764: }
 765: 
 766: struct symtab *
 767: ppsym(s) char *s; {/* kluge */
 768:     register struct symtab *sp;
 769:     cinit=SALT; *savch++=SALT; sp=stsym(s); --sp->name; cinit=0; return(sp);
 770: }
 771: 
 772: /* VARARGS1 */
 773: pperror(s,x,y) char *s; {
 774:     if (fnames[ifno][0]) fprintf(stderr,
 775: # if gcos
 776:             "*%c*   \"%s\", line ", exfail >= 0 ? 'F' : 'W',
 777: # else
 778:             "%s: ",
 779: # endif
 780:                  fnames[ifno]);
 781:     fprintf(stderr, "%d: ",lineno[ifno]);
 782:     fprintf(stderr, s, x, y);
 783:     fprintf(stderr,"\n");
 784:     ++exfail;
 785: }
 786: 
 787: yyerror(s,a,b) char *s; {
 788:     pperror(s,a,b);
 789: }
 790: 
 791: ppwarn(s,x) char *s; {
 792:     int fail = exfail;
 793:     exfail = -1;
 794:     pperror(s,x);
 795:     exfail = fail;
 796: }
 797: 
 798: struct symtab *
 799: lookup(namep, enterf)
 800: char *namep;
 801: {
 802:     register char *np, *snp;
 803:     register int c, i; int around;
 804:     register struct symtab *sp;
 805: 
 806:     /* namep had better not be too long (currently, <=8 chars) */
 807:     np=namep; around=0; i=cinit;
 808:     while (c= *np++) i += i+c; c=i; /* c=i for register usage on pdp11 */
 809:     c %= symsiz; if (c<0) c += symsiz;
 810:     sp = &stab[c];
 811:     while (snp=sp->name) {
 812:         np = namep;
 813:         while (*snp++ == *np) if (*np++ == '\0') {
 814:                 if (enterf==DROP) {sp->name[0]= DROP; sp->value=0;}
 815:                 return(lastsym=sp);
 816:             }
 817:         if (--sp < &stab[0])
 818:             if (around) {pperror("too many defines", 0); exit(exfail);}
 819:             else {++around; sp = &stab[symsiz-1];}
 820:     }
 821:     if (enterf>0) sp->name=namep;
 822:     return(lastsym=sp);
 823: }
 824: 
 825: struct symtab *
 826: slookup(p1,p2,enterf) register char *p1,*p2; int enterf;{
 827:     register char *p3; char c2,c3; struct symtab *np;
 828:              c2= *p2; *p2='\0'; /* mark end of token */
 829:     if ((p2-p1)>8) p3=p1+8; else p3=p2;
 830:              c3= *p3; *p3='\0'; /* truncate to 8 chars or less */
 831:     if (enterf==1) p1=copy(p1);
 832:     np=lookup(p1,enterf); *p3=c3; *p2=c2;
 833:     if (np->value!=0 && flslvl==0) newp=subst(p2,np);
 834:     else newp=0;
 835:     return(np);
 836: }
 837: 
 838: char *
 839: subst(p,sp) register char *p; struct symtab *sp; {
 840:     static char match[]="%s: argument mismatch";
 841:     register char *ca,*vp; int params;
 842:     char *actual[MAXFRM]; /* actual[n] is text of nth actual */
 843:     char acttxt[BUFSIZ]; /* space for actuals */
 844: 
 845:     if (0==(vp=sp->value)) return(p);
 846:     if ((p-macforw)<=macdam) {
 847:         if (++maclvl>symsiz && !rflag) {
 848:             pperror("%s: macro recursion",sp->name); return(p);
 849:         }
 850:     } else maclvl=0;    /* level decreased */
 851:     macforw=p; macdam=0;    /* new target for decrease in level */
 852:     macnam=sp->name;
 853:     dump();
 854:     if (sp==ulnloc) {
 855:         vp=acttxt; *vp++='\0';
 856:         sprintf(vp,"%d",lineno[ifno]); while (*vp++);
 857:     } else if (sp==uflloc) {
 858:         vp=acttxt; *vp++='\0';
 859:         sprintf(vp,"\"%s\"",fnames[ifno]); while (*vp++);
 860:     }
 861:     if (0!=(params= *--vp&0xFF)) {/* definition calls for params */
 862:         register char **pa;
 863:         ca=acttxt; pa=actual;
 864:         if (params==0xFF) params=1; /* #define foo() ... */
 865:         sloscan(); ++flslvl; /* no expansion during search for actuals */
 866:         plvl= -1;
 867:         do p=skipbl(p); while (*inp=='\n'); /* skip \n too */
 868:         if (*inp=='(') {
 869:             maclin=lineno[ifno]; macfil=fnames[ifno];
 870:             for (plvl=1; plvl!=0; ) {
 871:                 *ca++='\0';
 872:                 for (;;) {
 873:                     outp=inp=p; p=cotoken(p);
 874:                     if (*inp=='(') ++plvl;
 875:                     if (*inp==')' && --plvl==0) {--params; break;}
 876:                     if (plvl==1 && *inp==',') {--params; break;}
 877:                     while (inp<p) *ca++= *inp++;
 878:                     if (ca> &acttxt[BUFSIZ])
 879:                         pperror("%s: actuals too long",sp->name);
 880:                 }
 881:                 if (pa>= &actual[MAXFRM]) ppwarn(match,sp->name);
 882:                 else *pa++=ca;
 883:             }
 884:         }
 885:         if (params!=0) ppwarn(match,sp->name);
 886:         while (--params>=0) *pa++=""+1; /* null string for missing actuals */
 887:         --flslvl; fasscan();
 888:     }
 889:     for (;;) {/* push definition onto front of input stack */
 890:         while (!iswarn(*--vp)) {
 891:             if (bob(p)) {outp=inp=p; p=unfill(p);}
 892:             *--p= *vp;
 893:         }
 894:         if (*vp==warnc) {/* insert actual param */
 895:             ca=actual[*--vp-1];
 896:             while (*--ca) {
 897:                 if (bob(p)) {outp=inp=p; p=unfill(p);}
 898:                 *--p= *ca;
 899:             }
 900:         } else break;
 901:     }
 902:     outp=inp=p;
 903:     return(p);
 904: }
 905: 
 906: 
 907: 
 908: 
 909: char *
 910: trmdir(s) register char *s; {
 911:     register char *p = s;
 912:     while (*p++); --p; while (p>s && *--p!='/');
 913: # if unix
 914:     if (p==s) *p++='.';
 915: # endif
 916:     *p='\0';
 917:     return(s);
 918: }
 919: 
 920: STATIC char *
 921: copy(s) register char *s; {
 922:     register char *old;
 923: 
 924:     old = savch; while (*savch++ = *s++);
 925:     return(old);
 926: }
 927: 
 928: char *
 929: strdex(s,c) char *s,c; {
 930:     while (*s) if (*s++==c) return(--s);
 931:     return(0);
 932: }
 933: 
 934: yywrap(){ return(1); }
 935: 
 936: main(argc,argv)
 937:     char *argv[];
 938: {
 939:     register int i,c;
 940:     register char *p;
 941:     char *tf,**cp2;
 942: 
 943: # if gcos
 944:     if (setjmp(env)) return (exfail);
 945: # endif
 946:     p="_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
 947:         i=0;
 948:         while (c= *p++) {
 949:             (fastab+COFF)[c] |= IB|NB|SB; (toktyp+COFF)[c]=IDENT;
 950: #if scw2
 951:             /* 53 == 63-10; digits rarely appear in identifiers,
 952: 			/* and can never be the first char of an identifier.
 953: 			/* 11 == 53*53/sizeof(macbit) .
 954: 			*/
 955:             ++i; (t21+COFF)[c]=(53*i)/11; (t22+COFF)[c]=i%11;
 956: #endif
 957:         }
 958:     p="0123456789.";
 959:         while (c= *p++) {(fastab+COFF)[c] |= NB|SB; (toktyp+COFF)[c]=NUMBR;}
 960: # if gcos
 961:     p="\n\"'`/\\";
 962: # else
 963:     p="\n\"'/\\";
 964: # endif
 965:         while (c= *p++) (fastab+COFF)[c] |= SB;
 966: # if gcos
 967:     p="\n\"'`\\";
 968: # else
 969:     p="\n\"'\\";
 970: # endif
 971:         while (c= *p++) (fastab+COFF)[c] |= QB;
 972:     p="*\n"; while (c= *p++) (fastab+COFF)[c] |= CB;
 973:     (fastab+COFF)[warnc] |= WB;
 974:     (fastab+COFF)['\0'] |= CB|QB|SB|WB;
 975:     for (i=ALFSIZ; --i>=0; ) slotab[i]=fastab[i]|SB;
 976:     p=" \t\013\f\r";    /* note no \n;	\v not legal for vertical tab? */
 977:         while (c= *p++) (toktyp+COFF)[c]=BLANK;
 978: #if scw2
 979:     for ((t23+COFF)[i=ALFSIZ+7-COFF]=1; --i>=-COFF; )
 980:         if (((t23+COFF)[i]=(t23+COFF+1)[i]<<1)==0) (t23+COFF)[i]=1;
 981: #endif
 982: 
 983: # if unix
 984:     fnames[ifno=0] = "";
 985: # endif
 986: # if ibm
 987:     fnames[ifno=0] = "";
 988: # endif
 989: # if gcos
 990:     if (inquire(stdin, _TTY)) freopen("*src", "rt", stdin);
 991: # endif
 992: # if gimpel || gcos
 993:     fnames[ifno=0] = (char *)inquire(stdin, _FILENAME);
 994:     dirnams[0] = dirs[0] = trmdir(copy(fnames[0]));
 995: # endif
 996:     for(i=1; i<argc; i++)
 997:         {
 998:         switch(argv[i][0])
 999:             {
1000:             case '-':
1001: # if gcos
1002:             switch(toupper(argv[i][1])) { /* case-independent on GCOS */
1003: # else
1004:             switch(argv[i][1]) {
1005: # endif
1006:                 case 'P': pflag++;
1007:                 case 'E': continue;
1008:                 case 'R': ++rflag; continue;
1009:                 case 'C': passcom++; continue;
1010:                 case 'D':
1011:                     if (predef>prespc+NPREDEF) {
1012:                         pperror("too many -D options, ignoring %s",argv[i]);
1013:                         continue;
1014:                     }
1015:                     /* ignore plain "-D" (no argument) */
1016:                     if (*(argv[i]+2)) *predef++ = argv[i]+2;
1017:                     continue;
1018:                 case 'U':
1019:                     if (prund>punspc+NPREDEF) {
1020:                         pperror("too many -U options, ignoring %s",argv[i]);
1021:                         continue;
1022:                     }
1023:                     *prund++ = argv[i]+2;
1024:                     continue;
1025:                 case 'I':
1026:                     if (nd>8) pperror("excessive -I file (%s) ignored",argv[i]);
1027:                     else dirs[nd++] = argv[i]+2;
1028:                     continue;
1029:                 case '\0': continue;
1030:                 default:
1031:                     pperror("unknown flag %s", argv[i]);
1032:                     continue;
1033:                 }
1034:             default:
1035:                 if (fin==STDIN) {
1036:                     if (0>(fin=open(argv[i], READ))) {
1037:                         pperror("No source file %s",argv[i]); exit(8);
1038:                     }
1039:                     fnames[ifno]=copy(argv[i]);
1040:                     dirs[0]=dirnams[ifno]=trmdir(argv[i]);
1041: # ifndef gcos
1042: /* too dangerous to have file name in same syntactic position
1043:    be input or output file depending on file redirections,
1044:    so force output to stdout, willy-nilly
1045: 	[i don't see what the problem is.  jfr]
1046: */
1047:                 } else if (fout==stdout) {
1048:                     extern char _sobuf[BUFSIZ];
1049:                     if (NULL==(fout=fopen(argv[i], "w"))) {
1050:                         pperror("Can't create %s", argv[i]); exit(8);
1051:                     } else {fclose(stdout); setbuf(fout,_sobuf);}
1052: # endif
1053:                 } else pperror("extraneous name %s", argv[i]);
1054:             }
1055:         }
1056: 
1057:     fins[ifno]=fin;
1058:     exfail = 0;
1059:         /* after user -I files here are the standard include libraries */
1060: # if unix
1061:     dirs[nd++] = "/usr/include";
1062: # endif
1063: # if gcos
1064:     dirs[nd++] = "cc/include";
1065: # endif
1066: # if ibm
1067: # ifndef gimpel
1068:     dirs[nd++] = "BTL$CLIB";
1069: # endif
1070: # endif
1071: # ifdef gimpel
1072:     dirs[nd++] = intss() ?  "SYS3.C." : "" ;
1073: # endif
1074:     /* dirs[nd++] = "/compool"; */
1075:     dirs[nd++] = 0;
1076:     defloc=ppsym("define");
1077:     udfloc=ppsym("undef");
1078:     incloc=ppsym("include");
1079:     elsloc=ppsym("else");
1080:     eifloc=ppsym("endif");
1081:     ifdloc=ppsym("ifdef");
1082:     ifnloc=ppsym("ifndef");
1083:     ifloc=ppsym("if");
1084:     lneloc=ppsym("line");
1085:     for (i=sizeof(macbit)/sizeof(macbit[0]); --i>=0; ) macbit[i]=0;
1086: # if unix
1087:     ysysloc=stsym("unix");
1088: # endif
1089: # if gcos
1090:     ysysloc=stsym ("gcos");
1091: # endif
1092: # if ibm
1093:     ysysloc=stsym ("ibm");
1094: # endif
1095: # if pdp11
1096:     varloc=stsym("pdp11");
1097: # endif
1098: # if vax
1099:     varloc=stsym("vax");
1100: # endif
1101: # if interdata
1102:     varloc=stsym ("interdata");
1103: # endif
1104: # if tss
1105:     varloc=stsym ("tss");
1106: # endif
1107: # if os
1108:     varloc=stsym ("os");
1109: # endif
1110: # if mert
1111:     varloc=stsym ("mert");
1112: # endif
1113:     ulnloc=stsym ("__LINE__");
1114:     uflloc=stsym ("__FILE__");
1115: 
1116:     tf=fnames[ifno]; fnames[ifno]="command line"; lineno[ifno]=1;
1117:     cp2=prespc;
1118:     while (cp2<predef) stsym(*cp2++);
1119:     cp2=punspc;
1120:     while (cp2<prund) {
1121:         if (p=strdex(*cp2, '=')) *p++='\0';
1122:         lookup(*cp2++, DROP);
1123:     }
1124:     fnames[ifno]=tf;
1125:     pbeg=buffer+8; pbuf=pbeg+BUFSIZ; pend=pbuf+BUFSIZ;
1126: 
1127:     trulvl = 0; flslvl = 0;
1128:     lineno[0] = 1; sayline();
1129:     outp=inp=pend;
1130:     control(pend);
1131:     return (exfail);
1132: }

Defined functions

Defined variables

Defined struct's

Defined macros