2.11BSD#431 - /usr/src/lib/cpp/cpp.c

   1: /* static char sccsid[] = "@(#)cpp.c	1.8.2 1996/7/11"; */
   2: 
   3: #ifdef FLEXNAMES
   4: #define NCPS    128
   5: #else
   6: #define NCPS    8
   7: #endif
   8: 
   9: # include "stdio.h"
  10: # include "ctype.h"
  11: /* C command
  12: /* written by John F. Reiser
  13: /* July/August 1978
  14: */
  15: 
  16: #define STATIC
  17: 
  18: #define STDIN 0
  19: #define STDOUT 1
  20: #define STDERR 2
  21: #define READ 0
  22: #define WRITE 1
  23: #define SALT '#'
  24: #ifndef BUFSIZ
  25: #define BUFSIZ 512
  26: #endif
  27: 
  28: char *pbeg,*pbuf,*pend;
  29: char *outp,*inp;
  30: char *newp;
  31: char cinit;
  32: 
  33: /* some code depends on whether characters are sign or zero extended */
  34: /*	#if '\377' < 0		not used here, old cpp doesn't understand */
  35: #if pdp11 | vax | mc68000
  36: #define COFF 128
  37: #else
  38: #define COFF 0
  39: #endif
  40: 
  41: # if gcos
  42: #define ALFSIZ 512  /* alphabet size */
  43: # else
  44: #define ALFSIZ 256  /* alphabet size */
  45: # endif
  46: char macbit[ALFSIZ+11];
  47: char toktyp[ALFSIZ];
  48: #define BLANK 1
  49: #define IDENT 2
  50: #define NUMBR 3
  51: 
  52: /* a superimposed code is used to reduce the number of calls to the
  53: /* symbol table lookup routine.  (if the kth character of an identifier
  54: /* is 'a' and there are no macro names whose kth character is 'a'
  55: /* then the identifier cannot be a macro name, hence there is no need
  56: /* to look in the symbol table.)  'scw1' enables the test based on
  57: /* single characters and their position in the identifier.  'scw2'
  58: /* enables the test based on adjacent pairs of characters and their
  59: /* position in the identifier.  scw1 typically costs 1 indexed fetch,
  60: /* an AND, and a jump per character of identifier, until the identifier
  61: /* is known as a non-macro name or until the end of the identifier.
  62: /* scw1 is inexpensive.  scw2 typically costs 4 indexed fetches,
  63: /* an add, an AND, and a jump per character of identifier, but it is also
  64: /* slightly more effective at reducing symbol table searches.
  65: /* scw2 usually costs too much because the symbol table search is
  66: /* usually short; but if symbol table search should become expensive,
  67: /* the code is here.
  68: /* using both scw1 and scw2 is of dubious value.
  69: */
  70: #define scw1 1
  71: #define scw2 0
  72: 
  73: #if scw2
  74: char t21[ALFSIZ],t22[ALFSIZ],t23[ALFSIZ+NCPS];
  75: #endif
  76: 
  77: #if scw1
  78: #define b0 1
  79: #define b1 2
  80: #define b2 4
  81: #define b3 8
  82: #define b4 16
  83: #define b5 32
  84: #define b6 64
  85: #define b7 128
  86: #endif
  87: 
  88: #define IB 1
  89: #define SB 2
  90: #define NB 4
  91: #define CB 8
  92: #define QB 16
  93: #define WB 32
  94: char fastab[ALFSIZ];
  95: char slotab[ALFSIZ];
  96: char *ptrtab;
  97: #define isslo (ptrtab==(slotab+COFF))
  98: #define isid(a)  ((fastab+COFF)[a]&IB)
  99: #define isspc(a) (ptrtab[a]&SB)
 100: #define isnum(a) ((fastab+COFF)[a]&NB)
 101: #define iscom(a) ((fastab+COFF)[a]&CB)
 102: #define isquo(a) ((fastab+COFF)[a]&QB)
 103: #define iswarn(a) ((fastab+COFF)[a]&WB)
 104: 
 105: #define eob(a) ((a)>=pend)
 106: #define bob(a) (pbeg>=(a))
 107: 
 108: # define cputc(a,b) if(!flslvl) putc(a,b)
 109: 
 110: char buffer[NCPS+BUFSIZ+BUFSIZ+NCPS];
 111: 
 112: #ifdef pdp11
 113: # define SBSIZE ((unsigned)0114130) /* PDP compiler doesn't like 39024 */
 114: short   sbff[SBSIZE/2];
 115: # define sbf ((char *)sbff)
 116: #else !pdp11
 117: # define SBSIZE 60000       /* std = 12000, wnj aug 1979 */
 118: char    sbf[SBSIZE];
 119: #endif pdp11
 120: char    *savch  = sbf;
 121: 
 122: # define DROP 0xFE  /* special character not legal ASCII or EBCDIC */
 123: # define WARN DROP
 124: # define SAME 0
 125: # define MAXINC 10
 126: # define MAXFRE 14  /* max buffers of macro pushback */
 127: # define MAXFRM 31  /* max number of formals/actuals to a macro */
 128: 
 129: static char warnc = WARN;
 130: 
 131: int mactop,fretop;
 132: char *instack[MAXFRE],*bufstack[MAXFRE],*endbuf[MAXFRE];
 133: 
 134: int plvl;   /* parenthesis level during scan for macro actuals */
 135: int maclin; /* line number of macro call requiring actuals */
 136: char *macfil;   /* file name of macro call requiring actuals */
 137: char *macnam;   /* name of macro requiring actuals */
 138: int maclvl; /* # calls since last decrease in nesting level */
 139: char *macforw;  /* pointer which must be exceeded to decrease nesting level */
 140: int macdam; /* offset to macforw due to buffer shifting */
 141: 
 142: #if tgp
 143: int tgpscan;    /* flag for dump(); */
 144: #endif
 145: 
 146: STATIC  int inctop[MAXINC];
 147: STATIC  char    *fnames[MAXINC];
 148: STATIC  char    *dirnams[MAXINC];   /* actual directory of #include files */
 149: STATIC  int fins[MAXINC];
 150: STATIC  int lineno[MAXINC];
 151: 
 152: STATIC  char    *dirs[10];  /* -I and <> directories */
 153: char *strdex(), *copy(), *subst(), *trmdir();
 154: struct symtab *stsym();
 155: STATIC  int fin = STDIN;
 156: STATIC  FILE    *fout   = stdout;
 157: STATIC  int nd  = 1;
 158: STATIC  int pflag;  /* don't put out lines "# 12 foo.c" */
 159: int passcom;    /* don't delete comments */
 160: STATIC  int rflag;  /* allow macro recursion */
 161: STATIC  int mflag;  /* generate makefile dependencies */
 162: STATIC  char *infile;   /* name of .o file to build dependencies from */
 163: STATIC  FILE *mout; /* file to place dependencies on */
 164: #define START 1
 165: #define CONT  2
 166: #define BACK  3
 167: STATIC  int ifno;
 168: # define NPREDEF 30
 169: STATIC  char *prespc[NPREDEF];
 170: STATIC  char **predef = prespc;
 171: STATIC  char *punspc[NPREDEF];
 172: STATIC  char **prund = punspc;
 173: STATIC  int exfail;
 174: struct symtab {
 175:     char    *name;
 176:     char    *value;
 177: } *lastsym, *lookup(), *slookup();
 178: 
 179: # if gcos
 180: #include <setjmp.h>
 181: static jmp_buf env;
 182: # define main   mainpp
 183: # undef exit
 184: # define exit(S)    longjmp(env, 1)
 185: # define open(S,D)  fileno(fopen(S, "r"))
 186: # define close(F)   fclose(_f[F])
 187: extern FILE *_f[];
 188: # define symsiz 500
 189: # else
 190: # define symsiz 2000        /* std = 500, wnj aug 1979 */
 191: # endif
 192: STATIC  struct symtab stab[symsiz];
 193: 
 194: STATIC  struct symtab *defloc;
 195: STATIC  struct symtab *udfloc;
 196: STATIC  struct symtab *incloc;
 197: STATIC  struct symtab *ifloc;
 198: STATIC  struct symtab *elsloc;
 199: STATIC  struct symtab *eifloc;
 200: STATIC  struct symtab *ifdloc;
 201: STATIC  struct symtab *ifnloc;
 202: STATIC  struct symtab *ysysloc;
 203: STATIC  struct symtab *varloc;
 204: STATIC  struct symtab *lneloc;
 205: STATIC  struct symtab *ulnloc;
 206: STATIC  struct symtab *uflloc;
 207: STATIC  int trulvl;
 208: STATIC  int flslvl;
 209: 
 210: sayline(where)
 211:     int where;
 212: {
 213:     if (mflag && where==START) fprintf(mout, "%s: %s\n", infile, fnames[ifno]);
 214:     if (pflag==0) fprintf(fout,"# %d \"%s\"\n", lineno[ifno], fnames[ifno]);
 215: }
 216: 
 217: /* data structure guide
 218: /*
 219: /* most of the scanning takes place in the buffer:
 220: /*
 221: /*  (low address)                                             (high address)
 222: /*  pbeg                           pbuf                                 pend
 223: /*  |      <-- BUFSIZ chars -->      |         <-- BUFSIZ chars -->        |
 224: /*  _______________________________________________________________________
 225: /* |_______________________________________________________________________|
 226: /*          |               |               |
 227: /*          |<-- waiting -->|               |<-- waiting -->
 228: /*          |    to be      |<-- current -->|    to be
 229: /*          |    written    |    token      |    scanned
 230: /*          |               |               |
 231: /*          outp            inp             p
 232: /*
 233: /*  *outp   first char not yet written to output file
 234: /*  *inp    first char of current token
 235: /*  *p      first char not yet scanned
 236: /*
 237: /* macro expansion: write from *outp to *inp (chars waiting to be written),
 238: /* ignore from *inp to *p (chars of the macro call), place generated
 239: /* characters in front of *p (in reverse order), update pointers,
 240: /* resume scanning.
 241: /*
 242: /* symbol table pointers point to just beyond the end of macro definitions;
 243: /* the first preceding character is the number of formal parameters.
 244: /* the appearance of a formal in the body of a definition is marked by
 245: /* 2 chars: the char WARN, and a char containing the parameter number.
 246: /* the first char of a definition is preceded by a zero character.
 247: /*
 248: /* when macro expansion attempts to back up over the beginning of the
 249: /* buffer, some characters preceding *pend are saved in a side buffer,
 250: /* the address of the side buffer is put on 'instack', and the rest
 251: /* of the main buffer is moved to the right.  the end of the saved buffer
 252: /* is kept in 'endbuf' since there may be nulls in the saved buffer.
 253: /*
 254: /* similar action is taken when an 'include' statement is processed,
 255: /* except that the main buffer must be completely emptied.  the array
 256: /* element 'inctop[ifno]' records the last side buffer saved when
 257: /* file 'ifno' was included.  these buffers remain dormant while
 258: /* the file is being read, and are reactivated at end-of-file.
 259: /*
 260: /* instack[0 : mactop] holds the addresses of all pending side buffers.
 261: /* instack[inctop[ifno]+1 : mactop-1] holds the addresses of the side
 262: /* buffers which are "live"; the side buffers instack[0 : inctop[ifno]]
 263: /* are dormant, waiting for end-of-file on the current file.
 264: /*
 265: /* space for side buffers is obtained from 'savch' and is never returned.
 266: /* bufstack[0:fretop-1] holds addresses of side buffers which
 267: /* are available for use.
 268: */
 269: 
 270: dump() {
 271: /* write part of buffer which lies between  outp  and  inp .
 272: /* this should be a direct call to 'write', but the system slows to a crawl
 273: /* if it has to do an unaligned copy.  thus we buffer.  this silly loop
 274: /* is 15% of the total time, thus even the 'putc' macro is too slow.
 275: */
 276:     register char *p1,*p2; register FILE *f;
 277:     if ((p1=outp)==inp || flslvl!=0) return;
 278: #if tgp
 279: #define MAXOUT 80
 280:     if (!tgpscan) {/* scan again to insure <= MAXOUT chars between linefeeds */
 281:         register char c,*pblank; char savc,stopc,brk;
 282:         tgpscan=1; brk=stopc=pblank=0; p2=inp; savc= *p2; *p2='\0';
 283:         while (c= *p1++) {
 284:             if (c=='\\') c= *p1++;
 285:             if (stopc==c) stopc=0;
 286:             else if (c=='"' || c=='\'') stopc=c;
 287:             if (p1-outp>MAXOUT && pblank!=0) {
 288:                 *pblank++='\n'; inp=pblank; dump(); brk=1; pblank=0;
 289:             }
 290:             if (c==' ' && stopc==0) pblank=p1-1;
 291:         }
 292:         if (brk) sayline(CONT);
 293:         *p2=savc; inp=p2; p1=outp; tgpscan=0;
 294:     }
 295: #endif
 296:     f=fout;
 297: # if gcos
 298: /* filter out "$ program c" card if first line of input */
 299: /* gmatch is a simple pattern matcher in the GCOS Standard Library */
 300: {   static int gmfirst = 0;
 301:     if (!gmfirst) {
 302:         ++gmfirst;
 303:         if (gmatch(p1, "^$*program[ \t]*c*"))
 304:             p1 = strdex(p1, '\n');
 305:     }
 306: }
 307: # endif
 308:     while (p1<inp) putc(*p1++,f);
 309:     outp=p1;
 310: }
 311: 
 312: char *
 313: refill(p) register char *p; {
 314: /* dump buffer.  save chars from inp to p.  read into buffer at pbuf,
 315: /* contiguous with p.  update pointers, return new p.
 316: */
 317:     register char *np,*op; register int ninbuf;
 318:     dump(); np=pbuf-(p-inp); op=inp;
 319:     if (bob(np+1)) {pperror("token too long"); np=pbeg; p=inp+BUFSIZ;}
 320:     macdam += np-inp; outp=inp=np;
 321:     while (op<p) *np++= *op++;
 322:     p=np;
 323:     for (;;) {
 324:         if (mactop>inctop[ifno]) {/* retrieve hunk of pushed-back macro text */
 325:             op=instack[--mactop]; np=pbuf;
 326:             do {while (*np++= *op++);} while (op<endbuf[mactop]); pend=np-1;
 327:             /* make buffer space avail for 'include' processing */
 328:             if (fretop<MAXFRE) bufstack[fretop++]=instack[mactop];
 329:             return(p);
 330:         } else {/* get more text from file(s) */
 331:             maclvl=0;
 332:             if (0<(ninbuf=read(fin,pbuf,BUFSIZ))) {
 333:                 pend=pbuf+ninbuf; *pend='\0';
 334:                 return(p);
 335:             }
 336:             /* end of #include file */
 337:             if (ifno==0) {/* end of input */
 338:                 if (plvl!=0) {
 339:                     int n=plvl,tlin=lineno[ifno]; char *tfil=fnames[ifno];
 340:                     lineno[ifno]=maclin; fnames[ifno]=macfil;
 341:                     pperror("%s: unterminated macro call",macnam);
 342:                     lineno[ifno]=tlin; fnames[ifno]=tfil;
 343:                     np=p; *np++='\n';   /* shut off unterminated quoted string */
 344:                     while (--n>=0) *np++=')';   /* supply missing parens */
 345:                     pend=np; *np='\0'; if (plvl<0) plvl=0;
 346:                     return(p);
 347:                 }
 348:                 if (trulvl || flslvl)
 349:                     pperror("missing endif");
 350:                 inp=p; dump(); exit(exfail);
 351:             }
 352:             close(fin); fin=fins[--ifno]; dirs[0]=dirnams[ifno]; sayline(BACK);
 353:         }
 354:     }
 355: }
 356: 
 357: #define BEG 0
 358: #define LF 1
 359: 
 360: char *
 361: cotoken(p) register char *p; {
 362:     register int c,i; char quoc;
 363:     static int state = BEG;
 364: 
 365:     if (state!=BEG) goto prevlf;
 366: for (;;) {
 367: again:
 368:     while (!isspc(*p++));
 369:     switch (*(inp=p-1)) {
 370:     case 0: {
 371:         if (eob(--p)) {p=refill(p); goto again;}
 372:         else ++p; /* ignore null byte */
 373:     } break;
 374:     case '|': case '&': for (;;) {/* sloscan only */
 375:         if (*p++== *inp) break;
 376:         if (eob(--p)) p=refill(p);
 377:         else break;
 378:     } break;
 379:     case '=': case '!': for (;;) {/* sloscan only */
 380:         if (*p++=='=') break;
 381:         if (eob(--p)) p=refill(p);
 382:         else break;
 383:     } break;
 384:     case '<': case '>': for (;;) {/* sloscan only */
 385:         if (*p++=='=' || p[-2]==p[-1]) break;
 386:         if (eob(--p)) p=refill(p);
 387:         else break;
 388:     } break;
 389:     case '\\': for (;;) {
 390:         if (*p++=='\n') {++lineno[ifno]; break;}
 391:         if (eob(--p)) p=refill(p);
 392:         else {++p; break;}
 393:     } break;
 394:     case '/': for (;;) {
 395:         if (*p++=='*') {/* comment */
 396:             if (!passcom) {inp=p-2; dump(); ++flslvl;}
 397:             for (;;) {
 398:                 while (!iscom(*p++));
 399:                 if (p[-1]=='*') for (;;) {
 400:                     if (*p++=='/') goto endcom;
 401:                     if (eob(--p)) {
 402:                         if (!passcom) {inp=p; p=refill(p);}
 403:                         else if ((p-inp)>=BUFSIZ) {/* split long comment */
 404:                             inp=p; p=refill(p); /* last char written is '*' */
 405:                             cputc('/',fout);    /* terminate first part */
 406:                             /* and fake start of 2nd */
 407:                             outp=inp=p-=3; *p++='/'; *p++='*'; *p++='*';
 408:                         } else p=refill(p);
 409:                     } else break;
 410:                 } else if (p[-1]=='\n') {
 411:                     ++lineno[ifno]; if (!passcom) putc('\n',fout);
 412:                 } else if (eob(--p)) {
 413:                     if (!passcom) {inp=p; p=refill(p);}
 414:                     else if ((p-inp)>=BUFSIZ) {/* split long comment */
 415:                         inp=p; p=refill(p);
 416:                         cputc('*',fout); cputc('/',fout);
 417:                         outp=inp=p-=2; *p++='/'; *p++='*';
 418:                     } else p=refill(p);
 419:                 } else ++p; /* ignore null byte */
 420:             }
 421:         endcom:
 422:             if (!passcom) {outp=inp=p; --flslvl; goto again;}
 423:             break;
 424:         }
 425:         if (eob(--p)) p=refill(p);
 426:         else break;
 427:     } break;
 428: # if gcos
 429:     case '`':
 430: # endif
 431:     case '"': case '\'': {
 432:         quoc=p[-1];
 433:         for (;;) {
 434:             while (!isquo(*p++));
 435:             if (p[-1]==quoc) break;
 436:             if (p[-1]=='\n') {--p; break;} /* bare \n terminates quotation */
 437:             if (p[-1]=='\\') for (;;) {
 438:                 if (*p++=='\n') {++lineno[ifno]; break;} /* escaped \n ignored */
 439:                 if (eob(--p)) p=refill(p);
 440:                 else {++p; break;}
 441:             } else if (eob(--p)) p=refill(p);
 442:             else ++p;   /* it was a different quote character */
 443:         }
 444:     } break;
 445:     case '\n': {
 446:         ++lineno[ifno]; if (isslo) {state=LF; return(p);}
 447: prevlf:
 448:         state=BEG;
 449:         for (;;) {
 450:             if (*p++=='#') return(p);
 451:             if (eob(inp= --p)) p=refill(p);
 452:             else goto again;
 453:         }
 454:     } break;
 455:     case '0': case '1': case '2': case '3': case '4':
 456:     case '5': case '6': case '7': case '8': case '9':
 457:     for (;;) {
 458:         while (isnum(*p++));
 459:         if (eob(--p)) p=refill(p);
 460:         else break;
 461:     } break;
 462:     case 'A': case 'B': case 'C': case 'D': case 'E':
 463:     case 'F': case 'G': case 'H': case 'I': case 'J':
 464:     case 'K': case 'L': case 'M': case 'N': case 'O':
 465:     case 'P': case 'Q': case 'R': case 'S': case 'T':
 466:     case 'U': case 'V': case 'W': case 'X': case 'Y':
 467:     case 'Z': case '_':
 468:     case 'a': case 'b': case 'c': case 'd': case 'e':
 469:     case 'f': case 'g': case 'h': case 'i': case 'j':
 470:     case 'k': case 'l': case 'm': case 'n': case 'o':
 471:     case 'p': case 'q': case 'r': case 's': case 't':
 472:     case 'u': case 'v': case 'w': case 'x': case 'y':
 473:     case 'z':
 474: #if scw1
 475: #define tmac1(c,bit) if (!xmac1(c,bit,&)) goto nomac
 476: #define xmac1(c,bit,op) ((macbit+COFF)[c] op (bit))
 477: #else
 478: #define tmac1(c,bit)
 479: #define xmac1(c,bit,op)
 480: #endif
 481: 
 482: #if scw2
 483: #define tmac2(c0,c1,cpos) if (!xmac2(c0,c1,cpos,&)) goto nomac
 484: #define xmac2(c0,c1,cpos,op)\
 485:     ((macbit+COFF)[(t21+COFF)[c0]+(t22+COFF)[c1]] op (t23+COFF+cpos)[c0])
 486: #else
 487: #define tmac2(c0,c1,cpos)
 488: #define xmac2(c0,c1,cpos,op)
 489: #endif
 490: 
 491:     if (flslvl) goto nomac;
 492:     for (;;) {
 493:         c= p[-1];                          tmac1(c,b0);
 494:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b1); tmac2(c,i,0);
 495:         c= *p++; if (!isid(c)) goto endid; tmac1(c,b2); tmac2(i,c,1);
 496:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b3); tmac2(c,i,2);
 497:         c= *p++; if (!isid(c)) goto endid; tmac1(c,b4); tmac2(i,c,3);
 498:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b5); tmac2(c,i,4);
 499:         c= *p++; if (!isid(c)) goto endid; tmac1(c,b6); tmac2(i,c,5);
 500:         i= *p++; if (!isid(i)) goto endid; tmac1(i,b7); tmac2(c,i,6);
 501:                                                         tmac2(i,0,7);
 502:         while (isid(*p++));
 503:         if (eob(--p)) {refill(p); p=inp+1; continue;}
 504:         goto lokid;
 505:     endid:
 506:         if (eob(--p)) {refill(p); p=inp+1; continue;}
 507:         tmac2(p[-1],0,-1+(p-inp));
 508:     lokid:
 509:         slookup(inp,p,0); if (newp) {p=newp; goto again;}
 510:         else break;
 511:     nomac:
 512:         while (isid(*p++));
 513:         if (eob(--p)) {p=refill(p); goto nomac;}
 514:         else break;
 515:     } break;
 516:     } /* end of switch */
 517: 
 518:     if (isslo) return(p);
 519: } /* end of infinite loop */
 520: }
 521: 
 522: char *
 523: skipbl(p) register char *p; {/* get next non-blank token */
 524:     do {outp=inp=p; p=cotoken(p);} while ((toktyp+COFF)[*inp]==BLANK);
 525:     return(p);
 526: }
 527: 
 528: char *
 529: unfill(p) register char *p; {
 530: /* take <= BUFSIZ chars from right end of buffer and put them on instack .
 531: /* slide rest of buffer to the right, update pointers, return new p.
 532: */
 533:     register char *np,*op; register int d;
 534:     if (mactop>=MAXFRE) {
 535:         pperror("%s: too much pushback",macnam);
 536:         p=inp=pend; dump(); /* begin flushing pushback */
 537:         while (mactop>inctop[ifno]) {p=refill(p); p=inp=pend; dump();}
 538:     }
 539:     if (fretop>0) np=bufstack[--fretop];
 540:     else {
 541:         np=savch; savch+=BUFSIZ;
 542:         if (savch>=sbf+SBSIZE) {pperror("no space"); exit(exfail);}
 543:         *savch++='\0';
 544:     }
 545:     instack[mactop]=np; op=pend-BUFSIZ; if (op<p) op=p;
 546:     for (;;) {while (*np++= *op++); if (eob(op)) break;} /* out with old */
 547:     endbuf[mactop++]=np;    /* mark end of saved text */
 548:     np=pbuf+BUFSIZ; op=pend-BUFSIZ; pend=np; if (op<p) op=p;
 549:     while (outp<op) *--np= *--op; /* slide over new */
 550:     if (bob(np)) pperror("token too long");
 551:     d=np-outp; outp+=d; inp+=d; macdam+=d; return(p+d);
 552: }
 553: 
 554: char *
 555: doincl(p) register char *p; {
 556:     int filok,inctype;
 557:     register char *cp; char **dirp,*nfil; char filname[BUFSIZ];
 558: 
 559:     p=skipbl(p); cp=filname;
 560:     if (*inp++=='<') {/* special <> syntax */
 561:         inctype=1;
 562:         ++flslvl;   /* prevent macro expansion */
 563:         for (;;) {
 564:             outp=inp=p; p=cotoken(p);
 565:             if (*inp=='\n') {--p; *cp='\0'; break;}
 566:             if (*inp=='>') {      *cp='\0'; break;}
 567: # ifdef gimpel
 568:             if (*inp=='.' && !intss()) *inp='#';
 569: # endif
 570:             while (inp<p) *cp++= *inp++;
 571:         }
 572:         --flslvl;   /* reenable macro expansion */
 573:     } else if (inp[-1]=='"') {/* regular "" syntax */
 574:         inctype=0;
 575: # ifdef gimpel
 576:         while (inp<p) {if (*inp=='.' && !intss()) *inp='#'; *cp++= *inp++;}
 577: # else
 578:         while (inp<p) *cp++= *inp++;
 579: # endif
 580:         if (*--cp=='"') *cp='\0';
 581:     } else {pperror("bad include syntax",0); inctype=2;}
 582:     /* flush current file to \n , then write \n */
 583:     ++flslvl; do {outp=inp=p; p=cotoken(p);} while (*inp!='\n'); --flslvl;
 584:     inp=p; dump(); if (inctype==2) return(p);
 585:     /* look for included file */
 586:     if (ifno+1 >=MAXINC) {
 587:         pperror("Unreasonable include nesting",0); return(p);
 588:     }
 589:     if((nfil=savch)>sbf+SBSIZE-BUFSIZ) {pperror("no space"); exit(exfail);}
 590:     filok=0;
 591:     for (dirp=dirs+inctype; *dirp; ++dirp) {
 592:         if (
 593: # if gcos
 594:             strdex(filname, '/')
 595: # else
 596:             filname[0]=='/'
 597: # endif
 598:                 || **dirp=='\0') strcpy(nfil,filname);
 599:         else {
 600:             strcpy(nfil,*dirp);
 601: # if unix || gcos
 602:             strcat(nfil,"/");
 603: # endif
 604: #ifdef ibm
 605: #ifndef gimpel
 606:             strcat(nfil,".");
 607: #endif
 608: #endif
 609:             strcat(nfil,filname);
 610:         }
 611:         if (0<(fins[ifno+1]=open(nfil,READ))) {
 612:             filok=1; fin=fins[++ifno]; break;
 613:         }
 614:     }
 615:     if (filok==0) pperror("Can't find include file %s",filname);
 616:     else {
 617:         lineno[ifno]=1; fnames[ifno]=cp=nfil; while (*cp++); savch=cp;
 618:         dirnams[ifno]=dirs[0]=trmdir(copy(nfil));
 619:         sayline(START);
 620:         /* save current contents of buffer */
 621:         while (!eob(p)) p=unfill(p);
 622:         inctop[ifno]=mactop;
 623:     }
 624:     return(p);
 625: }
 626: 
 627: equfrm(a,p1,p2) register char *a,*p1,*p2; {
 628:     register char c; int flag;
 629:     c= *p2; *p2='\0';
 630:     flag=strcmp(a,p1); *p2=c; return(flag==SAME);
 631: }
 632: 
 633: char *
 634: dodef(p) char *p; {/* process '#define' */
 635:     register char *pin,*psav,*cf;
 636:     char **pf,**qf; int b,c,params; struct symtab *np;
 637:     char *oldval,*oldsavch;
 638:     char *formal[MAXFRM]; /* formal[n] is name of nth formal */
 639:     char formtxt[BUFSIZ]; /* space for formal names */
 640:     int spasscom = passcom;
 641:     passcom = 0;        /* strip comments from defines to save space */
 642: 
 643:     if (savch>sbf+SBSIZE-BUFSIZ) {pperror("too much defining"); return(p);}
 644:     oldsavch=savch; /* to reclaim space if redefinition */
 645:     ++flslvl; /* prevent macro expansion during 'define' */
 646:     p=skipbl(p); pin=inp;
 647:     if ((toktyp+COFF)[*pin]!=IDENT) {
 648:         ppwarn("illegal macro name"); while (*inp!='\n') p=skipbl(p); return(p);
 649:     }
 650:     np=slookup(pin,p,1);
 651:     if (oldval=np->value) savch=oldsavch;   /* was previously defined */
 652:     b=1; cf=pin;
 653:     while (cf<p) {/* update macbit */
 654:         c= *cf++; xmac1(c,b,|=); b=(b+b)&0xFF;
 655:         if (cf!=p) xmac2(c,*cf,-1+(cf-pin),|=);
 656:         else xmac2(c,0,-1+(cf-pin),|=);
 657:     }
 658:     params=0; outp=inp=p; p=cotoken(p); pin=inp;
 659:     if (*pin=='(') {/* with parameters; identify the formals */
 660:         cf=formtxt; pf=formal;
 661:         for (;;) {
 662:             p=skipbl(p); pin=inp;
 663:             if (*pin=='\n') {
 664:                 --lineno[ifno]; --p; pperror("%s: missing )",np->name); break;
 665:             }
 666:             if (*pin==')') break;
 667:             if (*pin==',') continue;
 668:             if ((toktyp+COFF)[*pin]!=IDENT) {
 669:                 c= *p; *p='\0'; pperror("bad formal: %s",pin); *p=c;
 670:             } else if (pf>= &formal[MAXFRM]) {
 671:                 c= *p; *p='\0'; pperror("too many formals: %s",pin); *p=c;
 672:             } else {
 673:                 *pf++=cf; while (pin<p) *cf++= *pin++; *cf++='\0'; ++params;
 674:             }
 675:         }
 676:         if (params==0) --params; /* #define foo() ... */
 677:     } else if (*pin=='\n') {--lineno[ifno]; --p;}
 678:     /* remember beginning of macro body, so that we can
 679: 	/* warn if a redefinition is different from old value.
 680: 	*/
 681:     oldsavch=psav=savch;
 682:     for (;;) {/* accumulate definition until linefeed */
 683:         outp=inp=p; p=cotoken(p); pin=inp;
 684:         if (*pin=='\\' && pin[1]=='\n') {putc('\n',fout); continue;}    /* ignore escaped lf */
 685:         if (*pin=='\n') break;
 686:         if (params) {/* mark the appearance of formals in the definiton */
 687:             if ((toktyp+COFF)[*pin]==IDENT) {
 688:                 for (qf=pf; --qf>=formal; ) {
 689:                     if (equfrm(*qf,pin,p)) {
 690:                         *psav++=qf-formal+1; *psav++=WARN; pin=p; break;
 691:                     }
 692:                 }
 693:             } else if (*pin=='"' || *pin=='\''
 694: # if gcos
 695:                     || *pin=='`'
 696: # endif
 697:                         ) {/* inside quotation marks, too */
 698:                 char quoc= *pin;
 699:                 for (*psav++= *pin++; pin<p && *pin!=quoc; ) {
 700:                     while (pin<p && !isid(*pin)) *psav++= *pin++;
 701:                     cf=pin; while (cf<p && isid(*cf)) ++cf;
 702:                     for (qf=pf; --qf>=formal; ) {
 703:                         if (equfrm(*qf,pin,cf)) {
 704:                             *psav++=qf-formal+1; *psav++=WARN; pin=cf; break;
 705:                         }
 706:                     }
 707:                     while (pin<cf) *psav++= *pin++;
 708:                 }
 709:             }
 710:         }
 711:         while (pin<p) *psav++= *pin++;
 712:     }
 713:     *psav++=params; *psav++='\0';
 714:     if ((cf=oldval)!=NULL) {/* redefinition */
 715:         --cf;   /* skip no. of params, which may be zero */
 716:         while (*--cf);  /* go back to the beginning */
 717:         if (0!=strcmp(++cf,oldsavch)) {/* redefinition different from old */
 718:             --lineno[ifno]; ppwarn("%s redefined",np->name); ++lineno[ifno];
 719:             np->value=psav-1;
 720:         } else psav=oldsavch; /* identical redef.; reclaim space */
 721:     } else np->value=psav-1;
 722:     --flslvl; inp=pin; savch=psav; passcom = spasscom; return(p);
 723: }
 724: 
 725: #define fasscan() ptrtab=fastab+COFF
 726: #define sloscan() ptrtab=slotab+COFF
 727: 
 728: char *
 729: control(p) register char *p; {/* find and handle preprocessor control lines */
 730:     register struct symtab *np;
 731: for (;;) {
 732:     fasscan(); p=cotoken(p); if (*inp=='\n') ++inp; dump();
 733:     sloscan(); p=skipbl(p);
 734:     *--inp=SALT; outp=inp; ++flslvl; np=slookup(inp,p,0); --flslvl;
 735:     if (np==defloc) {/* define */
 736:         if (flslvl==0) {p=dodef(p); continue;}
 737:     } else if (np==incloc) {/* include */
 738:         if (flslvl==0) {p=doincl(p); continue;}
 739:     } else if (np==ifnloc) {/* ifndef */
 740:         ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
 741:         if (flslvl==0 && np->value==0) ++trulvl;
 742:         else ++flslvl;
 743:     } else if (np==ifdloc) {/* ifdef */
 744:         ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl;
 745:         if (flslvl==0 && np->value!=0) ++trulvl;
 746:         else ++flslvl;
 747:     } else if (np==eifloc) {/* endif */
 748:         if (flslvl) {if (--flslvl==0) sayline(CONT);}
 749:         else if (trulvl) --trulvl;
 750:         else pperror("If-less endif",0);
 751:     } else if (np==elsloc) {/* else */
 752:         if (flslvl) {
 753:             if (--flslvl!=0) ++flslvl;
 754:             else {++trulvl; sayline(CONT);}
 755:         }
 756:         else if (trulvl) {++flslvl; --trulvl;}
 757:         else pperror("If-less else",0);
 758:     } else if (np==udfloc) {/* undefine */
 759:         if (flslvl==0) {
 760:             ++flslvl; p=skipbl(p); slookup(inp,p,DROP); --flslvl;
 761:         }
 762:     } else if (np==ifloc) {/* if */
 763: #if tgp
 764:         pperror(" IF not implemented, true assumed", 0);
 765:         if (flslvl==0) ++trulvl; else ++flslvl;
 766: #else
 767:         newp=p;
 768:         if (flslvl==0 && yyparse()) ++trulvl; else ++flslvl;
 769:         p=newp;
 770: #endif
 771:     } else if (np==lneloc) {/* line */
 772:         if (flslvl==0 && pflag==0) {
 773:             char *cp, *cp2, *savestring();
 774:             outp=inp=p; *--outp='#'; while (*inp!='\n') p=cotoken(p);
 775:             cp = outp + 1;
 776:             while (isspace(*cp) && cp < inp)
 777:                 cp++;
 778:             while (isdigit(*cp) && cp < inp)
 779:                 cp++;
 780:             while (*cp != '"' && cp < inp)
 781:                 cp++;
 782:             if (cp < inp) {
 783:                 cp++;
 784:                 cp2 = cp;
 785:                 while (*cp2 != '"' && cp2 < inp)
 786:                     cp2++;
 787:                 fnames[ifno] = savestring(cp, cp2);
 788:             }
 789:             continue;
 790:         }
 791:     } else if (*++inp=='\n') outp=inp;  /* allows blank line after # */
 792:     else pperror("undefined control",0);
 793:     /* flush to lf */
 794:     ++flslvl; while (*inp!='\n') {outp=inp=p; p=cotoken(p);} --flslvl;
 795: }
 796: }
 797: 
 798: char *
 799: savestring(start, finish)
 800:     register char *start, *finish;
 801: {
 802:     char *retbuf;
 803:     register char *cp;
 804: 
 805:     retbuf = (char *) calloc(finish - start + 1, sizeof (char));
 806:     cp = retbuf;
 807:     while (start < finish)
 808:         *cp++ = *start++;
 809:     *cp = 0;
 810:     return(retbuf);
 811: }
 812: 
 813: struct symtab *
 814: stsym(s) register char *s; {
 815:     char buf[BUFSIZ]; register char *p;
 816: 
 817:     /* make definition look exactly like end of #define line */
 818:     /* copy to avoid running off end of world when param list is at end */
 819:     p=buf; while (*p++= *s++);
 820:     p=buf; while (isid(*p++)); /* skip first identifier */
 821:     if (*--p=='=') {*p++=' '; while (*p++);}
 822:     else {s=" 1"; while (*p++= *s++);}
 823:     pend=p; *--p='\n';
 824:     sloscan(); dodef(buf); return(lastsym);
 825: }
 826: 
 827: struct symtab *
 828: ppsym(s) char *s; {/* kluge */
 829:     register struct symtab *sp;
 830:     cinit=SALT; *savch++=SALT; sp=stsym(s); --sp->name; cinit=0; return(sp);
 831: }
 832: 
 833: /* VARARGS1 */
 834: pperror(s,x,y) char *s; {
 835:     if (fnames[ifno][0]) fprintf(stderr,
 836: # if gcos
 837:             "*%c*   \"%s\", line ", exfail >= 0 ? 'F' : 'W',
 838: # else
 839:             "%s: ",
 840: # endif
 841:                  fnames[ifno]);
 842:     fprintf(stderr, "%d: ",lineno[ifno]);
 843:     fprintf(stderr, s, x, y);
 844:     fprintf(stderr,"\n");
 845:     ++exfail;
 846: }
 847: 
 848: yyerror(s,a,b) char *s; {
 849:     pperror(s,a,b);
 850: }
 851: 
 852: ppwarn(s,x) char *s; {
 853:     int fail = exfail;
 854:     exfail = -1;
 855:     pperror(s,x);
 856:     exfail = fail;
 857: }
 858: 
 859: struct symtab *
 860: lookup(namep, enterf)
 861: char *namep;
 862: {
 863:     register char *np, *snp;
 864:     register int c, i; int around;
 865:     register struct symtab *sp;
 866: 
 867:     /* namep had better not be too long (currently, <=NCPS chars) */
 868:     np=namep; around=0; i=cinit;
 869:     while (c= *np++) i += i+c; c=i; /* c=i for register usage on pdp11 */
 870:     c %= symsiz; if (c<0) c += symsiz;
 871:     sp = &stab[c];
 872:     while (snp=sp->name) {
 873:         np = namep;
 874:         while (*snp++ == *np) if (*np++ == '\0') {
 875:                 if (enterf==DROP) {sp->name[0]= DROP; sp->value=0;}
 876:                 return(lastsym=sp);
 877:             }
 878:         if (--sp < &stab[0])
 879:             if (around) {pperror("too many defines", 0); exit(exfail);}
 880:             else {++around; sp = &stab[symsiz-1];}
 881:     }
 882:     if (enterf==1) sp->name=namep;
 883:     return(lastsym=sp);
 884: }
 885: 
 886: struct symtab *
 887: slookup(p1,p2,enterf) register char *p1,*p2; int enterf;{
 888:     register char *p3; char c2,c3; struct symtab *np;
 889:              c2= *p2; *p2='\0'; /* mark end of token */
 890:     if ((p2-p1)>NCPS) p3=p1+NCPS; else p3=p2;
 891:              c3= *p3; *p3='\0'; /* truncate to NCPS chars or less */
 892:     if (enterf==1) p1=copy(p1);
 893:     np=lookup(p1,enterf); *p3=c3; *p2=c2;
 894:     if (np->value!=0 && flslvl==0) newp=subst(p2,np);
 895:     else newp=0;
 896:     return(np);
 897: }
 898: 
 899: char *
 900: subst(p,sp) register char *p; struct symtab *sp; {
 901:     static char match[]="%s: argument mismatch";
 902:     register char *ca,*vp; int params;
 903:     char *actual[MAXFRM]; /* actual[n] is text of nth actual   */
 904:     char actused[MAXFRM]; /* for newline processing in actuals */
 905:     char acttxt[BUFSIZ];  /* space for actuals */
 906:     int  nlines = 0;
 907: 
 908:     if (0==(vp=sp->value)) return(p);
 909:     if ((p-macforw)<=macdam) {
 910:         if (++maclvl>symsiz && !rflag) {
 911:             pperror("%s: macro recursion",sp->name); return(p);
 912:         }
 913:     } else maclvl=0;    /* level decreased */
 914:     macforw=p; macdam=0;    /* new target for decrease in level */
 915:     macnam=sp->name;
 916:     dump();
 917:     if (sp==ulnloc) {
 918:         vp=acttxt; *vp++='\0';
 919:         sprintf(vp,"%d",lineno[ifno]); while (*vp++);
 920:     } else if (sp==uflloc) {
 921:         vp=acttxt; *vp++='\0';
 922:         sprintf(vp,"\"%s\"",fnames[ifno]); while (*vp++);
 923:     }
 924:     if (0!=(params= *--vp&0xFF)) {/* definition calls for params */
 925:         register char **pa;
 926:         ca=acttxt; pa=actual;
 927:         if (params==0xFF) params=1; /* #define foo() ... */
 928:         sloscan(); ++flslvl; /* no expansion during search for actuals */
 929:         plvl= -1;
 930:         do p=skipbl(p); while (*inp=='\n'); /* skip \n too */
 931:         if (*inp=='(') {
 932:             maclin=lineno[ifno]; macfil=fnames[ifno];
 933:             for (plvl=1; plvl!=0; ) {
 934:                 *ca++='\0';
 935:                 for (;;) {
 936:                     outp=inp=p; p=cotoken(p);
 937:                     if (*inp=='(') ++plvl;
 938:                     if (*inp==')' && --plvl==0) {--params; break;}
 939:                     if (plvl==1 && *inp==',') {--params; break;}
 940:                     while (inp<p) *ca++= *inp++;
 941:                     if (ca> &acttxt[BUFSIZ])
 942:                         pperror("%s: actuals too long",sp->name);
 943:                 }
 944:                 if (pa>= &actual[MAXFRM]) ppwarn(match,sp->name);
 945:                 else { actused[pa-actual]=0; *pa++=ca; }
 946:             }
 947:             nlines = lineno[ifno] - maclin;
 948:             lineno[ifno] = maclin; /* don't count newlines here */
 949:         }
 950:         if (params!=0) ppwarn(match,sp->name);
 951:         while (--params>=0) *pa++=""+1; /* null string for missing actuals */
 952:         --flslvl; fasscan();
 953:     }
 954:     for (;;) {/* push definition onto front of input stack */
 955:         while (!iswarn(*--vp)) {
 956:             if (bob(p)) {outp=inp=p; p=unfill(p);}
 957:             *--p= *vp;
 958:         }
 959:         if (*vp==warnc) {/* insert actual param */
 960:             ca=actual[*--vp-1];
 961:             while (*--ca) {
 962:                 if (bob(p)) {outp=inp=p; p=unfill(p);}
 963:                 /* Actuals with newlines confuse line numbering */
 964:                 if (*ca == '\n' && actused[*vp-1])
 965:                     if (*(ca-1) == '\\') ca--;
 966:                     else *--p = ' ';
 967:                 else { *--p= *ca; if (*ca == '\n') nlines--; }
 968:             }
 969:             actused[*vp-1] = 1;
 970:         } else {
 971:             if (nlines > 0 )
 972:                 while (nlines-- > 0)
 973:                     *--p = '\n';
 974:             break;
 975:         }
 976:     }
 977:     outp=inp=p;
 978:     return(p);
 979: }
 980: 
 981: 
 982: 
 983: 
 984: char *
 985: trmdir(s) register char *s; {
 986:     register char *p = s;
 987:     while (*p++); --p; while (p>s && *--p!='/');
 988: # if unix
 989:     if (p==s) *p++='.';
 990: # endif
 991:     *p='\0';
 992:     return(s);
 993: }
 994: 
 995: STATIC char *
 996: copy(s) register char *s; {
 997:     register char *old;
 998: 
 999:     old = savch; while (*savch++ = *s++);
1000:     return(old);
1001: }
1002: 
1003: char *
1004: strdex(s,c) char *s,c; {
1005:     while (*s) if (*s++==c) return(--s);
1006:     return(0);
1007: }
1008: 
1009: yywrap(){ return(1); }
1010: 
1011: main(argc,argv)
1012:     char *argv[];
1013: {
1014:     register int i,c;
1015:     register char *p;
1016:     char *tf,**cp2, obuf[BUFSIZ];
1017: 
1018: # if gcos
1019:     if (setjmp(env)) return (exfail);
1020: # endif
1021:     p="_$ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
1022:         i=0;
1023:         while (c= *p++) {
1024:             (fastab+COFF)[c] |= IB|NB|SB; (toktyp+COFF)[c]=IDENT;
1025: #if scw2
1026:             /* 53 == 63-10; digits rarely appear in identifiers,
1027: 			/* and can never be the first char of an identifier.
1028: 			/* 11 == 53*53/sizeof(macbit) .
1029: 			*/
1030:             ++i; (t21+COFF)[c]=(53*i)/11; (t22+COFF)[c]=i%11;
1031: #endif
1032:         }
1033:     p="0123456789.";
1034:         while (c= *p++) {(fastab+COFF)[c] |= NB|SB; (toktyp+COFF)[c]=NUMBR;}
1035: # if gcos
1036:     p="\n\"'`/\\";
1037: # else
1038:     p="\n\"'/\\";
1039: # endif
1040:         while (c= *p++) (fastab+COFF)[c] |= SB;
1041: # if gcos
1042:     p="\n\"'`\\";
1043: # else
1044:     p="\n\"'\\";
1045: # endif
1046:         while (c= *p++) (fastab+COFF)[c] |= QB;
1047:     p="*\n"; while (c= *p++) (fastab+COFF)[c] |= CB;
1048:     (fastab+COFF)[warnc] |= WB;
1049:     (fastab+COFF)['\0'] |= CB|QB|SB|WB;
1050:     for (i=ALFSIZ; --i>=0; ) slotab[i]=fastab[i]|SB;
1051:     p=" \t\013\f\r";    /* note no \n;	\v not legal for vertical tab? */
1052:         while (c= *p++) (toktyp+COFF)[c]=BLANK;
1053: #if scw2
1054:     for ((t23+COFF)[i=ALFSIZ+7-COFF]=1; --i>=-COFF; )
1055:         if (((t23+COFF)[i]=(t23+COFF+1)[i]<<1)==0) (t23+COFF)[i]=1;
1056: #endif
1057: 
1058: # if unix
1059:     fnames[ifno=0] = ""; dirnams[0]=dirs[0]=".";
1060: # endif
1061: # if ibm
1062:     fnames[ifno=0] = "";
1063: # endif
1064: # if gcos
1065:     if (inquire(stdin, _TTY)) freopen("*src", "rt", stdin);
1066: # endif
1067: # if gimpel || gcos
1068:     fnames[ifno=0] = (char *)inquire(stdin, _FILENAME);
1069:     dirnams[0] = dirs[0] = trmdir(copy(fnames[0]));
1070: # endif
1071:     for(i=1; i<argc; i++)
1072:         {
1073:         switch(argv[i][0])
1074:             {
1075:             case '-':
1076: # if gcos
1077:             switch(toupper(argv[i][1])) { /* case-independent on GCOS */
1078: # else
1079:             switch(argv[i][1]) {
1080: # endif
1081:                 case 'M': mflag++;
1082:                 case 'P': pflag++;
1083:                 case 'E': continue;
1084:                 case 'R': ++rflag; continue;
1085:                 case 'C': passcom++; continue;
1086:                 case 'D':
1087:                     if (predef>prespc+NPREDEF) {
1088:                         pperror("too many -D options, ignoring %s",argv[i]);
1089:                         continue;
1090:                     }
1091:                     /* ignore plain "-D" (no argument) */
1092:                     if (*(argv[i]+2)) *predef++ = argv[i]+2;
1093:                     continue;
1094:                 case 'U':
1095:                     if (prund>punspc+NPREDEF) {
1096:                         pperror("too many -U options, ignoring %s",argv[i]);
1097:                         continue;
1098:                     }
1099:                     *prund++ = argv[i]+2;
1100:                     continue;
1101:                 case 'I':
1102:                     if (nd>8) pperror("excessive -I file (%s) ignored",argv[i]);
1103:                     else dirs[nd++] = argv[i]+2;
1104:                     continue;
1105:                 case '\0': continue;
1106:                 default:
1107:                     pperror("unknown flag %s", argv[i]);
1108:                     continue;
1109:                 }
1110:             default:
1111:                 if (fin==STDIN) {
1112:                     if (0>(fin=open(argv[i], READ))) {
1113:                         pperror("No source file %s",argv[i]); exit(8);
1114:                     }
1115:                     fnames[ifno]=copy(argv[i]);
1116:                     infile=copy(argv[i]);
1117:                     dirs[0]=dirnams[ifno]=trmdir(argv[i]);
1118: # ifndef gcos
1119: /* too dangerous to have file name in same syntactic position
1120:    be input or output file depending on file redirections,
1121:    so force output to stdout, willy-nilly
1122: 	[i don't see what the problem is.  jfr]
1123: */
1124:                 } else if (fout==stdout) {
1125:                     if (NULL==(fout=fopen(argv[i], "w"))) {
1126:                         pperror("Can't create %s", argv[i]); exit(8);
1127:                     } else fclose(stdout);
1128: # endif
1129:                 } else pperror("extraneous name %s", argv[i]);
1130:             }
1131:         }
1132: 
1133:     if (mflag) {
1134:         if (infile==(char *)0) {
1135:             fprintf(stderr,
1136:                 "no input file specified with -M flag\n");
1137:             exit(8);
1138:         }
1139:         tf=(char *)rindex(infile, '.');
1140:         if (tf==0) {
1141:             fprintf(stderr, "missing component name on %s\n",
1142:                 infile);
1143:             exit(8);
1144:         }
1145:         tf[1]='o';
1146:         tf=(char *)rindex(infile, '/');
1147:         if (tf!=(char *)0)
1148:             infile = tf + 1;
1149:         mout=fout;
1150:         setbuf(mout, (char *)NULL);
1151:         if (NULL==(fout=fopen("/dev/null", "w"))) {
1152:             pperror("Can't open /dev/null");
1153:             exit(8);
1154:         }
1155:     }
1156:     setbuf(fout, obuf);
1157:     fins[ifno]=fin;
1158:     exfail = 0;
1159:         /* after user -I files here are the standard include libraries */
1160: # if unix
1161:     dirs[nd++] = "/usr/include";
1162: # endif
1163: # if gcos
1164:     dirs[nd++] = "cc/include";
1165: # endif
1166: # if ibm
1167: # ifndef gimpel
1168:     dirs[nd++] = "BTL$CLIB";
1169: # endif
1170: # endif
1171: # ifdef gimpel
1172:     dirs[nd++] = intss() ?  "SYS3.C." : "" ;
1173: # endif
1174:     /* dirs[nd++] = "/compool"; */
1175:     dirs[nd++] = 0;
1176:     defloc=ppsym("define");
1177:     udfloc=ppsym("undef");
1178:     incloc=ppsym("include");
1179:     elsloc=ppsym("else");
1180:     eifloc=ppsym("endif");
1181:     ifdloc=ppsym("ifdef");
1182:     ifnloc=ppsym("ifndef");
1183:     ifloc=ppsym("if");
1184:     lneloc=ppsym("line");
1185:     for (i=sizeof(macbit)/sizeof(macbit[0]); --i>=0; ) macbit[i]=0;
1186: # if unix
1187:     ysysloc=stsym("unix");
1188: # endif
1189: # if gcos
1190:     ysysloc=stsym ("gcos");
1191: # endif
1192: # if ibm
1193:     ysysloc=stsym ("ibm");
1194: # endif
1195: # if pdp11
1196:     varloc=stsym("pdp11");
1197: # endif
1198: # if vax
1199:     varloc=stsym("vax");
1200: # endif
1201: # if interdata
1202:     varloc=stsym ("interdata");
1203: # endif
1204: # if tss
1205:     varloc=stsym ("tss");
1206: # endif
1207: # if os
1208:     varloc=stsym ("os");
1209: # endif
1210: # if mert
1211:     varloc=stsym ("mert");
1212: # endif
1213: # if mc68000
1214:     varloc=stsym("mc68000");
1215: # endif
1216: # if sun
1217:     varloc=stsym("sun");
1218: # endif
1219: # if BSD2_11
1220:     varloc=stsym("BSD2_11");
1221: # endif
1222: # if BSD2_10
1223:     varloc=stsym("BSD2_10");
1224: # endif
1225: # if BSD2_9
1226:     varloc=stsym("BSD2_9");
1227: # endif
1228:     ulnloc=stsym ("__LINE__");
1229:     uflloc=stsym ("__FILE__");
1230: 
1231:     tf=fnames[ifno]; fnames[ifno]="command line"; lineno[ifno]=1;
1232:     cp2=prespc;
1233:     while (cp2<predef) stsym(*cp2++);
1234:     cp2=punspc;
1235:     while (cp2<prund) {
1236:         if (p=strdex(*cp2, '=')) *p++='\0';
1237:         lookup(*cp2++, DROP);
1238:     }
1239:     fnames[ifno]=tf;
1240:     pbeg=buffer+NCPS; pbuf=pbeg+BUFSIZ; pend=pbuf+BUFSIZ;
1241: 
1242:     trulvl = 0; flslvl = 0;
1243:     lineno[0] = 1; sayline(START);
1244:     outp=inp=pend;
1245:     control(pend);
1246:     return (exfail);
1247: }

Defined functions

Defined variables

Defined struct's

Defined macros