1 #ifndef lint 2 static char sccsid[] = "@(#)cpp.c 1.11 08/07/85"; 3 #endif lint 4 5 #ifdef FLEXNAMES 6 #define NCPS 128 7 #else 8 #define NCPS 8 9 #endif 10 11 # include "stdio.h" 12 # include "ctype.h" 13 /* C command 14 /* written by John F. Reiser 15 /* July/August 1978 16 */ 17 18 #define STATIC 19 20 #define STDIN 0 21 #define STDOUT 1 22 #define STDERR 2 23 #define READ 0 24 #define WRITE 1 25 #define SALT '#' 26 #if !defined BUFSIZ || BUFSIZ < 8192 27 #undef BUFSIZ 28 #define BUFSIZ 8192 29 #endif 30 31 char *pbeg,*pbuf,*pend; 32 char *outp,*inp; 33 char *newp; 34 char cinit; 35 36 /* some code depends on whether characters are sign or zero extended */ 37 /* #if '\377' < 0 not used here, old cpp doesn't understand */ 38 #if pdp11 | vax | mc68000 39 #define COFF 128 40 #else 41 #define COFF 0 42 #endif 43 44 # if gcos 45 #define ALFSIZ 512 /* alphabet size */ 46 # else 47 #define ALFSIZ 256 /* alphabet size */ 48 # endif 49 char macbit[ALFSIZ+11]; 50 char toktyp[ALFSIZ]; 51 #define BLANK 1 52 #define IDENT 2 53 #define NUMBR 3 54 55 /* a superimposed code is used to reduce the number of calls to the 56 /* symbol table lookup routine. (if the kth character of an identifier 57 /* is 'a' and there are no macro names whose kth character is 'a' 58 /* then the identifier cannot be a macro name, hence there is no need 59 /* to look in the symbol table.) 'scw1' enables the test based on 60 /* single characters and their position in the identifier. 'scw2' 61 /* enables the test based on adjacent pairs of characters and their 62 /* position in the identifier. scw1 typically costs 1 indexed fetch, 63 /* an AND, and a jump per character of identifier, until the identifier 64 /* is known as a non-macro name or until the end of the identifier. 65 /* scw1 is inexpensive. scw2 typically costs 4 indexed fetches, 66 /* an add, an AND, and a jump per character of identifier, but it is also 67 /* slightly more effective at reducing symbol table searches. 68 /* scw2 usually costs too much because the symbol table search is 69 /* usually short; but if symbol table search should become expensive, 70 /* the code is here. 71 /* using both scw1 and scw2 is of dubious value. 72 */ 73 #define scw1 1 74 #define scw2 0 75 76 #if scw2 77 char t21[ALFSIZ],t22[ALFSIZ],t23[ALFSIZ+NCPS]; 78 #endif 79 80 #if scw1 81 #define b0 1 82 #define b1 2 83 #define b2 4 84 #define b3 8 85 #define b4 16 86 #define b5 32 87 #define b6 64 88 #define b7 128 89 #endif 90 91 #define IB 1 92 #define SB 2 93 #define NB 4 94 #define CB 8 95 #define QB 16 96 #define WB 32 97 char fastab[ALFSIZ]; 98 char slotab[ALFSIZ]; 99 char *ptrtab; 100 #define isslo (ptrtab==(slotab+COFF)) 101 #define isid(a) ((fastab+COFF)[a]&IB) 102 #define isspc(a) (ptrtab[a]&SB) 103 #define isnum(a) ((fastab+COFF)[a]&NB) 104 #define iscom(a) ((fastab+COFF)[a]&CB) 105 #define isquo(a) ((fastab+COFF)[a]&QB) 106 #define iswarn(a) ((fastab+COFF)[a]&WB) 107 108 #define eob(a) ((a)>=pend) 109 #define bob(a) (pbeg>=(a)) 110 111 # define cputc(a,b) if(!flslvl) putc(a,b) 112 113 char buffer[NCPS+BUFSIZ+BUFSIZ+NCPS]; 114 115 char *lastcopy; 116 117 char *malloc(), *realloc(); 118 119 # define DROP 0xFE /* special character not legal ASCII or EBCDIC */ 120 # define WARN DROP 121 # define SAME 0 122 # define MAXINC 10 123 # define MAXFRE 14 /* max buffers of macro pushback */ 124 # define MAXFRM 31 /* max number of formals/actuals to a macro */ 125 126 static char warnc = WARN; 127 128 int mactop,fretop; 129 char *instack[MAXFRE],*bufstack[MAXFRE],*endbuf[MAXFRE]; 130 131 int plvl; /* parenthesis level during scan for macro actuals */ 132 int maclin; /* line number of macro call requiring actuals */ 133 char *macfil; /* file name of macro call requiring actuals */ 134 char *macnam; /* name of macro requiring actuals */ 135 int maclvl; /* # calls since last decrease in nesting level */ 136 char *macforw; /* pointer which must be exceeded to decrease nesting level */ 137 int macdam; /* offset to macforw due to buffer shifting */ 138 139 #if tgp 140 int tgpscan; /* flag for dump(); */ 141 #endif 142 143 STATIC int inctop[MAXINC]; 144 STATIC char *fnames[MAXINC]; 145 STATIC char *dirnams[MAXINC]; /* actual directory of #include files */ 146 STATIC int fins[MAXINC]; 147 STATIC int lineno[MAXINC]; 148 149 STATIC char *dirs[10]; /* -I and <> directories */ 150 char *strdex(), *copy(), *subst(), *trmdir(); 151 struct symtab *stsym(); 152 STATIC int fin = STDIN; 153 STATIC FILE *fout = stdout; 154 STATIC int nd = 1; 155 STATIC int pflag; /* don't put out lines "# 12 foo.c" */ 156 int passcom; /* don't delete comments */ 157 STATIC int rflag; /* allow macro recursion */ 158 STATIC int mflag; /* generate makefile dependencies */ 159 STATIC char *infile; /* name of .o file to build dependencies from */ 160 STATIC FILE *mout; /* file to place dependencies on */ 161 #define START 1 162 #define CONT 2 163 #define BACK 3 164 STATIC int ifno; 165 # define NPREDEF 20 166 STATIC char *prespc[NPREDEF]; 167 STATIC char **predef = prespc; 168 STATIC char *punspc[NPREDEF]; 169 STATIC char **prund = punspc; 170 STATIC int exfail; 171 struct symtab { 172 char *name; 173 char *value; 174 } *lastsym, *lookup(), *slookup(); 175 176 # if gcos 177 #include <setjmp.h> 178 static jmp_buf env; 179 # define main mainpp 180 # undef exit 181 # define exit(S) longjmp(env, 1) 182 # define open(S,D) fileno(fopen(S, "r")) 183 # define close(F) fclose(_f[F]) 184 extern FILE *_f[]; 185 # define symsiz 500 186 # else 187 # define symsiz 2000 /* std = 500, wnj aug 1979 */ 188 # endif 189 STATIC struct symtab stab[symsiz]; 190 191 STATIC struct symtab *defloc; 192 STATIC struct symtab *udfloc; 193 STATIC struct symtab *incloc; 194 STATIC struct symtab *ifloc; 195 STATIC struct symtab *elsloc; 196 STATIC struct symtab *eifloc; 197 STATIC struct symtab *ifdloc; 198 STATIC struct symtab *ifnloc; 199 STATIC struct symtab *ysysloc; 200 STATIC struct symtab *varloc; 201 STATIC struct symtab *lneloc; 202 STATIC struct symtab *ulnloc; 203 STATIC struct symtab *uflloc; 204 STATIC struct symtab *identloc; /* Sys 5r3 compatibility */ 205 STATIC int trulvl; 206 STATIC int flslvl; 207 208 sayline(where) 209 int where; 210 { 211 if (mflag && where==START) fprintf(mout, "%s: %s\n", infile, fnames[ifno]); 212 if (pflag==0) fprintf(fout,"# %d \"%s\"\n", lineno[ifno], fnames[ifno]); 213 } 214 215 /* data structure guide 216 /* 217 /* most of the scanning takes place in the buffer: 218 /* 219 /* (low address) (high address) 220 /* pbeg pbuf pend 221 /* | <-- BUFSIZ chars --> | <-- BUFSIZ chars --> | 222 /* _______________________________________________________________________ 223 /* |_______________________________________________________________________| 224 /* | | | 225 /* |<-- waiting -->| |<-- waiting --> 226 /* | to be |<-- current -->| to be 227 /* | written | token | scanned 228 /* | | | 229 /* outp inp p 230 /* 231 /* *outp first char not yet written to output file 232 /* *inp first char of current token 233 /* *p first char not yet scanned 234 /* 235 /* macro expansion: write from *outp to *inp (chars waiting to be written), 236 /* ignore from *inp to *p (chars of the macro call), place generated 237 /* characters in front of *p (in reverse order), update pointers, 238 /* resume scanning. 239 /* 240 /* symbol table pointers point to just beyond the end of macro definitions; 241 /* the first preceding character is the number of formal parameters. 242 /* the appearance of a formal in the body of a definition is marked by 243 /* 2 chars: the char WARN, and a char containing the parameter number. 244 /* the first char of a definition is preceded by a zero character. 245 /* 246 /* when macro expansion attempts to back up over the beginning of the 247 /* buffer, some characters preceding *pend are saved in a side buffer, 248 /* the address of the side buffer is put on 'instack', and the rest 249 /* of the main buffer is moved to the right. the end of the saved buffer 250 /* is kept in 'endbuf' since there may be nulls in the saved buffer. 251 /* 252 /* similar action is taken when an 'include' statement is processed, 253 /* except that the main buffer must be completely emptied. the array 254 /* element 'inctop[ifno]' records the last side buffer saved when 255 /* file 'ifno' was included. these buffers remain dormant while 256 /* the file is being read, and are reactivated at end-of-file. 257 /* 258 /* instack[0 : mactop] holds the addresses of all pending side buffers. 259 /* instack[inctop[ifno]+1 : mactop-1] holds the addresses of the side 260 /* buffers which are "live"; the side buffers instack[0 : inctop[ifno]] 261 /* are dormant, waiting for end-of-file on the current file. 262 /* 263 /* space for side buffers is obtained from 'malloc' and is never returned. 264 /* bufstack[0:fretop-1] holds addresses of side buffers which 265 /* are available for use. 266 */ 267 268 dump() { 269 /* write part of buffer which lies between outp and inp . 270 /* this should be a direct call to 'write', but the system slows to a crawl 271 /* if it has to do an unaligned copy. thus we buffer. this silly loop 272 /* is 15% of the total time, thus even the 'putc' macro is too slow. 273 */ 274 register char *p1,*p2; register FILE *f; 275 if ((p1=outp)==inp || flslvl!=0) return; 276 #if tgp 277 #define MAXOUT 80 278 if (!tgpscan) {/* scan again to insure <= MAXOUT chars between linefeeds */ 279 register char c,*pblank; char savc,stopc,brk; 280 tgpscan=1; brk=stopc=pblank=0; p2=inp; savc= *p2; *p2='\0'; 281 while (c= *p1++) { 282 if (c=='\\') c= *p1++; 283 if (stopc==c) stopc=0; 284 else if (c=='"' || c=='\'') stopc=c; 285 if (p1-outp>MAXOUT && pblank!=0) { 286 *pblank++='\n'; inp=pblank; dump(); brk=1; pblank=0; 287 } 288 if (c==' ' && stopc==0) pblank=p1-1; 289 } 290 if (brk) sayline(CONT); 291 *p2=savc; inp=p2; p1=outp; tgpscan=0; 292 } 293 #endif 294 f=fout; 295 # if gcos 296 /* filter out "$ program c" card if first line of input */ 297 /* gmatch is a simple pattern matcher in the GCOS Standard Library */ 298 { static int gmfirst = 0; 299 if (!gmfirst) { 300 ++gmfirst; 301 if (gmatch(p1, "^$*program[ \t]*c*")) 302 p1 = strdex(p1, '\n'); 303 } 304 } 305 # endif 306 while (p1<inp) putc(*p1++,f); 307 outp=p1; 308 } 309 310 char * 311 refill(p) register char *p; { 312 /* dump buffer. save chars from inp to p. read into buffer at pbuf, 313 /* contiguous with p. update pointers, return new p. 314 */ 315 register char *np,*op; register int ninbuf; 316 dump(); np=pbuf-(p-inp); op=inp; 317 if (bob(np+1)) {pperror("token too long"); np=pbeg; p=inp+BUFSIZ;} 318 macdam += np-inp; outp=inp=np; 319 while (op<p) *np++= *op++; 320 p=np; 321 for (;;) { 322 if (mactop>inctop[ifno]) {/* retrieve hunk of pushed-back macro text */ 323 op=instack[--mactop]; np=pbuf; 324 do {while (*np++= *op++);} while (op<endbuf[mactop]); pend=np-1; 325 /* make buffer space avail for 'include' processing */ 326 if (fretop<MAXFRE) bufstack[fretop++]=instack[mactop]; 327 return(p); 328 } else {/* get more text from file(s) */ 329 maclvl=0; 330 if (0<(ninbuf=read(fin,pbuf,BUFSIZ))) { 331 pend=pbuf+ninbuf; *pend='\0'; 332 return(p); 333 } 334 /* end of #include file */ 335 if (ifno==0) {/* end of input */ 336 if (plvl!=0) { 337 int n=plvl,tlin=lineno[ifno]; char *tfil=fnames[ifno]; 338 lineno[ifno]=maclin; fnames[ifno]=macfil; 339 pperror("%s: unterminated macro call",macnam); 340 lineno[ifno]=tlin; fnames[ifno]=tfil; 341 np=p; *np++='\n'; /* shut off unterminated quoted string */ 342 while (--n>=0) *np++=')'; /* supply missing parens */ 343 pend=np; *np='\0'; if (plvl<0) plvl=0; 344 return(p); 345 } 346 if (trulvl || flslvl) 347 pperror("missing endif"); 348 inp=p; dump(); exit(exfail); 349 } 350 close(fin); fin=fins[--ifno]; dirs[0]=dirnams[ifno]; sayline(BACK); 351 } 352 } 353 } 354 355 #define BEG 0 356 #define LF 1 357 358 char * 359 cotoken(p) register char *p; { 360 register int c,i; char quoc; 361 static int state = BEG; 362 363 if (state!=BEG) goto prevlf; 364 for (;;) { 365 again: 366 while (!isspc(*p++)); 367 switch (*(inp=p-1)) { 368 case 0: { 369 if (eob(--p)) {p=refill(p); goto again;} 370 else ++p; /* ignore null byte */ 371 } break; 372 case '|': case '&': for (;;) {/* sloscan only */ 373 if (*p++== *inp) break; 374 if (eob(--p)) p=refill(p); 375 else break; 376 } break; 377 case '=': case '!': for (;;) {/* sloscan only */ 378 if (*p++=='=') break; 379 if (eob(--p)) p=refill(p); 380 else break; 381 } break; 382 case '<': case '>': for (;;) {/* sloscan only */ 383 if (*p++=='=' || p[-2]==p[-1]) break; 384 if (eob(--p)) p=refill(p); 385 else break; 386 } break; 387 case '\\': for (;;) { 388 if (*p++=='\n') {++lineno[ifno]; break;} 389 if (eob(--p)) p=refill(p); 390 else {++p; break;} 391 } break; 392 case '/': for (;;) { 393 if (*p++=='*') {/* comment */ 394 if (!passcom) {inp=p-2; dump(); ++flslvl;} 395 for (;;) { 396 while (!iscom(*p++)); 397 if (p[-1]=='*') for (;;) { 398 if (*p++=='/') goto endcom; 399 if (eob(--p)) { 400 if (!passcom) {inp=p; p=refill(p);} 401 else if ((p-inp)>=BUFSIZ) {/* split long comment */ 402 inp=p; p=refill(p); /* last char written is '*' */ 403 cputc('/',fout); /* terminate first part */ 404 /* and fake start of 2nd */ 405 outp=inp=p-=3; *p++='/'; *p++='*'; *p++='*'; 406 } else p=refill(p); 407 } else break; 408 } else if (p[-1]=='\n') { 409 ++lineno[ifno]; if (!passcom) putc('\n',fout); 410 } else if (eob(--p)) { 411 if (!passcom) {inp=p; p=refill(p);} 412 else if ((p-inp)>=BUFSIZ) {/* split long comment */ 413 inp=p; p=refill(p); 414 cputc('*',fout); cputc('/',fout); 415 outp=inp=p-=2; *p++='/'; *p++='*'; 416 } else p=refill(p); 417 } else ++p; /* ignore null byte */ 418 } 419 endcom: 420 if (!passcom) {outp=inp=p; --flslvl; goto again;} 421 break; 422 } 423 if (eob(--p)) p=refill(p); 424 else break; 425 } break; 426 # if gcos 427 case '`': 428 # endif 429 case '"': case '\'': { 430 quoc=p[-1]; 431 for (;;) { 432 while (!isquo(*p++)); 433 if (p[-1]==quoc) break; 434 if (p[-1]=='\n') {--p; break;} /* bare \n terminates quotation */ 435 if (p[-1]=='\\') for (;;) { 436 if (*p++=='\n') {++lineno[ifno]; break;} /* escaped \n ignored */ 437 if (eob(--p)) p=refill(p); 438 else {++p; break;} 439 } else if (eob(--p)) p=refill(p); 440 else ++p; /* it was a different quote character */ 441 } 442 } break; 443 case '\n': { 444 ++lineno[ifno]; if (isslo) {state=LF; return(p);} 445 prevlf: 446 state=BEG; 447 for (;;) { 448 if (*p++=='#') return(p); 449 if (eob(inp= --p)) p=refill(p); 450 else goto again; 451 } 452 } break; 453 case '0': case '1': case '2': case '3': case '4': 454 case '5': case '6': case '7': case '8': case '9': 455 for (;;) { 456 while (isnum(*p++)); 457 if (eob(--p)) p=refill(p); 458 else break; 459 } break; 460 case 'A': case 'B': case 'C': case 'D': case 'E': 461 case 'F': case 'G': case 'H': case 'I': case 'J': 462 case 'K': case 'L': case 'M': case 'N': case 'O': 463 case 'P': case 'Q': case 'R': case 'S': case 'T': 464 case 'U': case 'V': case 'W': case 'X': case 'Y': 465 case 'Z': case '_': 466 case 'a': case 'b': case 'c': case 'd': case 'e': 467 case 'f': case 'g': case 'h': case 'i': case 'j': 468 case 'k': case 'l': case 'm': case 'n': case 'o': 469 case 'p': case 'q': case 'r': case 's': case 't': 470 case 'u': case 'v': case 'w': case 'x': case 'y': 471 case 'z': 472 #if scw1 473 #define tmac1(c,bit) if (!xmac1(c,bit,&)) goto nomac 474 #define xmac1(c,bit,op) ((macbit+COFF)[c] op (bit)) 475 #else 476 #define tmac1(c,bit) 477 #define xmac1(c,bit,op) 478 #endif 479 480 #if scw2 481 #define tmac2(c0,c1,cpos) if (!xmac2(c0,c1,cpos,&)) goto nomac 482 #define xmac2(c0,c1,cpos,op)\ 483 ((macbit+COFF)[(t21+COFF)[c0]+(t22+COFF)[c1]] op (t23+COFF+cpos)[c0]) 484 #else 485 #define tmac2(c0,c1,cpos) 486 #define xmac2(c0,c1,cpos,op) 487 #endif 488 489 if (flslvl) goto nomac; 490 for (;;) { 491 c= p[-1]; tmac1(c,b0); 492 i= *p++; if (!isid(i)) goto endid; tmac1(i,b1); tmac2(c,i,0); 493 c= *p++; if (!isid(c)) goto endid; tmac1(c,b2); tmac2(i,c,1); 494 i= *p++; if (!isid(i)) goto endid; tmac1(i,b3); tmac2(c,i,2); 495 c= *p++; if (!isid(c)) goto endid; tmac1(c,b4); tmac2(i,c,3); 496 i= *p++; if (!isid(i)) goto endid; tmac1(i,b5); tmac2(c,i,4); 497 c= *p++; if (!isid(c)) goto endid; tmac1(c,b6); tmac2(i,c,5); 498 i= *p++; if (!isid(i)) goto endid; tmac1(i,b7); tmac2(c,i,6); 499 tmac2(i,0,7); 500 while (isid(*p++)); 501 if (eob(--p)) {refill(p); p=inp+1; continue;} 502 goto lokid; 503 endid: 504 if (eob(--p)) {refill(p); p=inp+1; continue;} 505 tmac2(p[-1],0,-1+(p-inp)); 506 lokid: 507 slookup(inp,p,0); if (newp) {p=newp; goto again;} 508 else break; 509 nomac: 510 while (isid(*p++)); 511 if (eob(--p)) {p=refill(p); goto nomac;} 512 else break; 513 } break; 514 } /* end of switch */ 515 516 if (isslo) return(p); 517 } /* end of infinite loop */ 518 } 519 520 char * 521 skipbl(p) register char *p; {/* get next non-blank token */ 522 do {outp=inp=p; p=cotoken(p);} while ((toktyp+COFF)[*inp]==BLANK); 523 return(p); 524 } 525 526 char * 527 unfill(p) register char *p; { 528 /* take <= BUFSIZ chars from right end of buffer and put them on instack . 529 /* slide rest of buffer to the right, update pointers, return new p. 530 */ 531 register char *np,*op; register int d; 532 if (mactop>=MAXFRE) { 533 pperror("%s: too much pushback",macnam); 534 p=inp=pend; dump(); /* begin flushing pushback */ 535 while (mactop>inctop[ifno]) {p=refill(p); p=inp=pend; dump();} 536 } 537 if (fretop>0) np=bufstack[--fretop]; 538 else { 539 np=malloc(BUFSIZ+1); 540 if (np==NULL) {pperror("no space"); exit(exfail);} 541 np[BUFSIZ]='\0'; 542 } 543 instack[mactop]=np; op=pend-BUFSIZ; if (op<p) op=p; 544 for (;;) {while (*np++= *op++); if (eob(op)) break;} /* out with old */ 545 endbuf[mactop++]=np; /* mark end of saved text */ 546 np=pbuf+BUFSIZ; op=pend-BUFSIZ; pend=np; if (op<p) op=p; 547 while (outp<op) *--np= *--op; /* slide over new */ 548 if (bob(np)) pperror("token too long"); 549 d=np-outp; outp+=d; inp+=d; macdam+=d; return(p+d); 550 } 551 552 char * 553 doincl(p) register char *p; { 554 int filok,inctype; 555 register char *cp; char **dirp,*nfil; char filname[BUFSIZ]; 556 557 p=skipbl(p); cp=filname; 558 if (*inp++=='<') {/* special <> syntax */ 559 inctype=1; 560 ++flslvl; /* prevent macro expansion */ 561 for (;;) { 562 outp=inp=p; p=cotoken(p); 563 if (*inp=='\n') {--p; *cp='\0'; break;} 564 if (*inp=='>') { *cp='\0'; break;} 565 # ifdef gimpel 566 if (*inp=='.' && !intss()) *inp='#'; 567 # endif 568 while (inp<p) *cp++= *inp++; 569 } 570 --flslvl; /* reenable macro expansion */ 571 } else if (inp[-1]=='"') {/* regular "" syntax */ 572 inctype=0; 573 # ifdef gimpel 574 while (inp<p) {if (*inp=='.' && !intss()) *inp='#'; *cp++= *inp++;} 575 # else 576 while (inp<p) *cp++= *inp++; 577 # endif 578 if (*--cp=='"') *cp='\0'; 579 } else {pperror("bad include syntax",0); inctype=2;} 580 /* flush current file to \n , then write \n */ 581 ++flslvl; do {outp=inp=p; p=cotoken(p);} while (*inp!='\n'); --flslvl; 582 inp=p; dump(); if (inctype==2) return(p); 583 /* look for included file */ 584 if (ifno+1 >=MAXINC) { 585 pperror("Unreasonable include nesting",0); return(p); 586 } 587 if((nfil=malloc(BUFSIZ))==NULL) {pperror("no space"); exit(exfail);} 588 filok=0; 589 for (dirp=dirs+inctype; *dirp; ++dirp) { 590 if ( 591 # if gcos 592 strdex(filname, '/') 593 # else 594 filname[0]=='/' 595 # endif 596 || **dirp=='\0') strcpy(nfil,filname); 597 else { 598 strcpy(nfil,*dirp); 599 # if unix || gcos 600 strcat(nfil,"/"); 601 # endif 602 #ifdef ibm 603 #ifndef gimpel 604 strcat(nfil,"."); 605 #endif 606 #endif 607 strcat(nfil,filname); 608 } 609 if (0<(fins[ifno+1]=open(nfil,READ))) { 610 filok=1; fin=fins[++ifno]; break; 611 } 612 } 613 if(filok==0){pperror("Can't find include file %s",filname);free(nfil);} 614 else { 615 nfil=realloc(nfil,strlen(nfil)+1); 616 lineno[ifno]=1; fnames[ifno]=nfil; 617 dirnams[ifno]=dirs[0]=trmdir(copy(nfil)); 618 sayline(START); 619 /* save current contents of buffer */ 620 while (!eob(p)) p=unfill(p); 621 inctop[ifno]=mactop; 622 } 623 return(p); 624 } 625 626 equfrm(a,p1,p2) register char *a,*p1,*p2; { 627 register char c; int flag; 628 c= *p2; *p2='\0'; 629 flag=strcmp(a,p1); *p2=c; return(flag==SAME); 630 } 631 632 char * 633 dodef(p) char *p; {/* process '#define' */ 634 register char *pin,*psav,*cf; 635 char **pf,**qf; int b,c,params; struct symtab *np; 636 char *oldval; 637 char *space, *newspace; 638 char *formal[MAXFRM]; /* formal[n] is name of nth formal */ 639 char formtxt[BUFSIZ]; /* space for formal names */ 640 641 ++flslvl; /* prevent macro expansion during 'define' */ 642 p=skipbl(p); pin=inp; 643 if ((toktyp+COFF)[*pin]!=IDENT) { 644 ppwarn("illegal macro name"); while (*inp!='\n') p=skipbl(p); return(p); 645 } 646 np=slookup(pin,p,1); 647 if (oldval=np->value) free(lastcopy); /* was previously defined */ 648 b=1; cf=pin; 649 while (cf<p) {/* update macbit */ 650 c= *cf++; xmac1(c,b,|=); b=(b+b)&0xFF; 651 if (cf!=p) xmac2(c,*cf,-1+(cf-pin),|=); 652 else xmac2(c,0,-1+(cf-pin),|=); 653 } 654 params=0; outp=inp=p; p=cotoken(p); pin=inp; 655 if (*pin=='(') {/* with parameters; identify the formals */ 656 cf=formtxt; pf=formal; 657 for (;;) { 658 p=skipbl(p); pin=inp; 659 if (*pin=='\n') { 660 --lineno[ifno]; --p; pperror("%s: missing )",np->name); break; 661 } 662 if (*pin==')') break; 663 if (*pin==',') continue; 664 if ((toktyp+COFF)[*pin]!=IDENT) { 665 c= *p; *p='\0'; pperror("bad formal: %s",pin); *p=c; 666 } else if (pf>= &formal[MAXFRM]) { 667 c= *p; *p='\0'; pperror("too many formals: %s",pin); *p=c; 668 } else { 669 *pf++=cf; while (pin<p) *cf++= *pin++; *cf++='\0'; ++params; 670 } 671 } 672 if (params==0) --params; /* #define foo() ... */ 673 } else if (*pin=='\n') {--lineno[ifno]; --p;} 674 /* remember beginning of macro body, so that we can 675 /* warn if a redefinition is different from old value. 676 */ 677 space=psav=malloc(BUFSIZ); 678 if (space==NULL) {pperror("too much defining"); return(p);} 679 *psav++ = '\0'; 680 for (;;) {/* accumulate definition until linefeed */ 681 outp=inp=p; p=cotoken(p); pin=inp; 682 if (*pin=='\\' && pin[1]=='\n') {putc('\n',fout); continue;} /* ignore escaped lf */ 683 if (*pin=='\n') break; 684 if (params) {/* mark the appearance of formals in the definiton */ 685 if ((toktyp+COFF)[*pin]==IDENT) { 686 for (qf=pf; --qf>=formal; ) { 687 if (equfrm(*qf,pin,p)) { 688 *psav++=qf-formal+1; *psav++=WARN; pin=p; break; 689 } 690 } 691 } else if (*pin=='"' || *pin=='\'' 692 # if gcos 693 || *pin=='`' 694 # endif 695 ) {/* inside quotation marks, too */ 696 char quoc= *pin; 697 for (*psav++= *pin++; pin<p && *pin!=quoc; ) { 698 while (pin<p && !isid(*pin)) *psav++= *pin++; 699 cf=pin; while (cf<p && isid(*cf)) ++cf; 700 for (qf=pf; --qf>=formal; ) { 701 if (equfrm(*qf,pin,cf)) { 702 *psav++=qf-formal+1; *psav++=WARN; pin=cf; break; 703 } 704 } 705 while (pin<cf) *psav++= *pin++; 706 } 707 } 708 } 709 while (pin<p) *psav++= *pin++; 710 } 711 *psav++=params; *psav++='\0'; 712 if ((cf=oldval)!=NULL) {/* redefinition */ 713 --cf; /* skip no. of params, which may be zero */ 714 while (*--cf); /* go back to the beginning */ 715 if (0!=strcmp(++cf,space+1)) {/* redefinition different from old */ 716 --lineno[ifno]; ppwarn("%s redefined",np->name); ++lineno[ifno]; 717 np->value=psav-1; 718 } else free(space); /* identical redef.; reclaim space */ 719 } else np->value=psav-1; 720 --flslvl; inp=pin; 721 if (np->value == psav-1) { 722 newspace = realloc(space, psav-space); 723 if (newspace==NULL) {pperror("no space"); exit(exfail);} 724 /* 725 * Adjust pointer in case this moved. 726 */ 727 np->value += newspace-space; 728 } 729 return(p); 730 } 731 732 #define fasscan() ptrtab=fastab+COFF 733 #define sloscan() ptrtab=slotab+COFF 734 735 char * 736 control(p) register char *p; {/* find and handle preprocessor control lines */ 737 register struct symtab *np; 738 for (;;) { 739 fasscan(); p=cotoken(p); if (*inp=='\n') ++inp; dump(); 740 sloscan(); p=skipbl(p); 741 *--inp=SALT; outp=inp; ++flslvl; np=slookup(inp,p,0); --flslvl; 742 if (np==defloc) {/* define */ 743 if (flslvl==0) {p=dodef(p); continue;} 744 } else if (np==incloc) {/* include */ 745 if (flslvl==0) {p=doincl(p); continue;} 746 } else if (np==ifnloc) {/* ifndef */ 747 ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl; 748 if (flslvl==0 && np->value==0) ++trulvl; 749 else ++flslvl; 750 } else if (np==ifdloc) {/* ifdef */ 751 ++flslvl; p=skipbl(p); np=slookup(inp,p,0); --flslvl; 752 if (flslvl==0 && np->value!=0) ++trulvl; 753 else ++flslvl; 754 } else if (np==eifloc) {/* endif */ 755 if (flslvl) {if (--flslvl==0) sayline(CONT);} 756 else if (trulvl) --trulvl; 757 else pperror("If-less endif",0); 758 } else if (np==elsloc) {/* else */ 759 if (flslvl) { 760 if (--flslvl!=0) ++flslvl; 761 else {++trulvl; sayline(CONT);} 762 } 763 else if (trulvl) {++flslvl; --trulvl;} 764 else pperror("If-less else",0); 765 } else if (np==udfloc) {/* undefine */ 766 if (flslvl==0) { 767 ++flslvl; p=skipbl(p); slookup(inp,p,DROP); --flslvl; 768 } 769 } else if (np==ifloc) {/* if */ 770 #if tgp 771 pperror(" IF not implemented, true assumed", 0); 772 if (flslvl==0) ++trulvl; else ++flslvl; 773 #else 774 newp=p; 775 if (flslvl==0 && yyparse()) ++trulvl; else ++flslvl; 776 p=newp; 777 #endif 778 } else if (np==lneloc) {/* line */ 779 if (flslvl==0 && pflag==0) { 780 char *cp, *cp2, *savestring(); 781 outp=inp=p; *--outp='#'; while (*inp!='\n') p=cotoken(p); 782 cp = outp + 1; 783 while (isspace(*cp) && cp < inp) 784 cp++; 785 while (isdigit(*cp) && cp < inp) 786 cp++; 787 while (*cp != '"' && cp < inp) 788 cp++; 789 if (cp < inp) { 790 cp++; 791 cp2 = cp; 792 while (*cp2 != '"' && cp2 < inp) 793 cp2++; 794 fnames[ifno] = savestring(cp, cp2); 795 } 796 continue; 797 } 798 } else if (np==identloc) {/* ident (for Sys 5r3 compat) */ 799 while(*inp!='\n') p=cotoken(p); 800 } else if (*++inp=='\n') outp=inp; /* allows blank line after # */ 801 else pperror("undefined control",0); 802 /* flush to lf */ 803 ++flslvl; while (*inp!='\n') {outp=inp=p; p=cotoken(p);} --flslvl; 804 } 805 } 806 807 char * 808 savestring(start, finish) 809 register char *start, *finish; 810 { 811 char *retbuf; 812 register char *cp; 813 814 retbuf = (char *) calloc(finish - start + 1, sizeof (char)); 815 cp = retbuf; 816 while (start < finish) 817 *cp++ = *start++; 818 *cp = 0; 819 return(retbuf); 820 } 821 822 struct symtab * 823 stsym(s) register char *s; { 824 char buf[BUFSIZ]; register char *p; 825 826 /* make definition look exactly like end of #define line */ 827 /* copy to avoid running off end of world when param list is at end */ 828 p=buf; while (*p++= *s++); 829 p=buf; while (isid(*p++)); /* skip first identifier */ 830 if (*--p=='=') {*p++=' '; while (*p++);} 831 else {s=" 1"; while (*p++= *s++);} 832 pend=p; *--p='\n'; 833 sloscan(); dodef(buf); return(lastsym); 834 } 835 836 struct symtab * 837 ppsym(s) char *s; {/* kluge */ 838 register struct symtab *sp; 839 register char *name; 840 841 cinit=SALT; sp=stsym(s); name = malloc(strlen(sp->name)+1+1); 842 name[0] = '#'; strcpy(name+1, sp->name); sp->name = name; 843 cinit=0; return(sp); 844 } 845 846 /* VARARGS1 */ 847 pperror(s,x,y) char *s; { 848 if (fnames[ifno][0]) fprintf(stderr, 849 # if gcos 850 "*%c* \"%s\", line ", exfail >= 0 ? 'F' : 'W', 851 # else 852 "%s: ", 853 # endif 854 fnames[ifno]); 855 fprintf(stderr, "%d: ",lineno[ifno]); 856 fprintf(stderr, s, x, y); 857 fprintf(stderr,"\n"); 858 ++exfail; 859 } 860 861 yyerror(s,a,b) char *s; { 862 pperror(s,a,b); 863 } 864 865 ppwarn(s,x) char *s; { 866 int fail = exfail; 867 exfail = -1; 868 pperror(s,x); 869 exfail = fail; 870 } 871 872 struct symtab * 873 lookup(namep, enterf) 874 char *namep; 875 { 876 register char *np, *snp; 877 register int c, i; int around; 878 register struct symtab *sp; 879 880 /* namep had better not be too long (currently, <=NCPS chars) */ 881 np=namep; around=0; i=cinit; 882 while (c= *np++) i += i+c; c=i; /* c=i for register usage on pdp11 */ 883 c %= symsiz; if (c<0) c += symsiz; 884 sp = &stab[c]; 885 while (snp=sp->name) { 886 np = namep; 887 while (*snp++ == *np) if (*np++ == '\0') { 888 if (enterf==DROP) {sp->name[0]= DROP; sp->value=0;} 889 return(lastsym=sp); 890 } 891 if (--sp < &stab[0]) 892 if (around) {pperror("too many defines", 0); exit(exfail);} 893 else {++around; sp = &stab[symsiz-1];} 894 } 895 if (enterf==1) sp->name=namep; 896 return(lastsym=sp); 897 } 898 899 struct symtab * 900 slookup(p1,p2,enterf) register char *p1,*p2; int enterf;{ 901 register char *p3; char c2,c3; struct symtab *np; 902 c2= *p2; *p2='\0'; /* mark end of token */ 903 if ((p2-p1)>NCPS) p3=p1+NCPS; else p3=p2; 904 c3= *p3; *p3='\0'; /* truncate to NCPS chars or less */ 905 if (enterf==1) p1=copy(p1); 906 np=lookup(p1,enterf); *p3=c3; *p2=c2; 907 if (np->value!=0 && flslvl==0) newp=subst(p2,np); 908 else newp=0; 909 return(np); 910 } 911 912 char * 913 subst(p,sp) register char *p; struct symtab *sp; { 914 static char match[]="%s: argument mismatch"; 915 register char *ca,*vp; int params; 916 char *actual[MAXFRM]; /* actual[n] is text of nth actual */ 917 char actused[MAXFRM]; /* for newline processing in actuals */ 918 char acttxt[BUFSIZ]; /* space for actuals */ 919 int nlines = 0; 920 921 if (0==(vp=sp->value)) return(p); 922 if ((p-macforw)<=macdam) { 923 if (++maclvl>symsiz && !rflag) { 924 pperror("%s: macro recursion",sp->name); return(p); 925 } 926 } else maclvl=0; /* level decreased */ 927 macforw=p; macdam=0; /* new target for decrease in level */ 928 macnam=sp->name; 929 dump(); 930 if (sp==ulnloc) { 931 vp=acttxt; *vp++='\0'; 932 sprintf(vp,"%d",lineno[ifno]); while (*vp++); 933 } else if (sp==uflloc) { 934 vp=acttxt; *vp++='\0'; 935 sprintf(vp,"\"%s\"",fnames[ifno]); while (*vp++); 936 } 937 if (0!=(params= *--vp&0xFF)) {/* definition calls for params */ 938 register char **pa; 939 ca=acttxt; pa=actual; 940 if (params==0xFF) params=1; /* #define foo() ... */ 941 sloscan(); ++flslvl; /* no expansion during search for actuals */ 942 plvl= -1; 943 do p=skipbl(p); while (*inp=='\n'); /* skip \n too */ 944 if (*inp=='(') { 945 maclin=lineno[ifno]; macfil=fnames[ifno]; 946 for (plvl=1; plvl!=0; ) { 947 *ca++='\0'; 948 for (;;) { 949 outp=inp=p; p=cotoken(p); 950 if (*inp=='(') ++plvl; 951 if (*inp==')' && --plvl==0) {--params; break;} 952 if (plvl==1 && *inp==',') {--params; break;} 953 while (inp<p) *ca++= *inp++; 954 if (ca> &acttxt[BUFSIZ]) 955 pperror("%s: actuals too long",sp->name); 956 } 957 if (pa>= &actual[MAXFRM]) ppwarn(match,sp->name); 958 else { actused[pa-actual]=0; *pa++=ca; } 959 } 960 nlines = lineno[ifno] - maclin; 961 lineno[ifno] = maclin; /* don't count newlines here */ 962 } 963 if (params!=0) ppwarn(match,sp->name); 964 while (--params>=0) *pa++=""+1; /* null string for missing actuals */ 965 --flslvl; fasscan(); 966 } 967 for (;;) {/* push definition onto front of input stack */ 968 while (!iswarn(*--vp)) { 969 if (bob(p)) {outp=inp=p; p=unfill(p);} 970 *--p= *vp; 971 } 972 if (*vp==warnc) {/* insert actual param */ 973 ca=actual[*--vp-1]; 974 while (*--ca) { 975 if (bob(p)) {outp=inp=p; p=unfill(p);} 976 /* Actuals with newlines confuse line numbering */ 977 if (*ca == '\n' && actused[*vp-1]) 978 if (*(ca-1) == '\\') ca--; 979 else *--p = ' '; 980 else { *--p= *ca; if (*ca == '\n') nlines--; } 981 } 982 actused[*vp-1] = 1; 983 } else { 984 if (nlines > 0 ) 985 while (nlines-- > 0) 986 *--p = '\n'; 987 break; 988 } 989 } 990 outp=inp=p; 991 return(p); 992 } 993 994 995 996 997 char * 998 trmdir(s) register char *s; { 999 register char *p = s; 1000 while (*p++); --p; while (p>s && *--p!='/'); 1001 # if unix 1002 if (p==s) *p++='.'; 1003 # endif 1004 *p='\0'; 1005 return(s); 1006 } 1007 1008 STATIC char * 1009 copy(s) register char *s; { 1010 register char *old; 1011 1012 old = malloc(strlen(s)+1); 1013 if (old==NULL) {pperror("no space"); exit(exfail);} 1014 strcpy(old, s); 1015 return(lastcopy=old); 1016 } 1017 1018 char * 1019 strdex(s,c) char *s,c; { 1020 while (*s) if (*s++==c) return(--s); 1021 return(0); 1022 } 1023 1024 yywrap(){ return(1); } 1025 1026 main(argc,argv) 1027 char *argv[]; 1028 { 1029 register int i,c; 1030 register char *p; 1031 char *tf,**cp2; 1032 1033 # if gcos 1034 if (setjmp(env)) return (exfail); 1035 # endif 1036 p="_$ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"; 1037 i=0; 1038 while (c= *p++) { 1039 (fastab+COFF)[c] |= IB|NB|SB; (toktyp+COFF)[c]=IDENT; 1040 #if scw2 1041 /* 53 == 63-10; digits rarely appear in identifiers, 1042 /* and can never be the first char of an identifier. 1043 /* 11 == 53*53/sizeof(macbit) . 1044 */ 1045 ++i; (t21+COFF)[c]=(53*i)/11; (t22+COFF)[c]=i%11; 1046 #endif 1047 } 1048 p="0123456789."; 1049 while (c= *p++) {(fastab+COFF)[c] |= NB|SB; (toktyp+COFF)[c]=NUMBR;} 1050 # if gcos 1051 p="\n\"'`/\\"; 1052 # else 1053 p="\n\"'/\\"; 1054 # endif 1055 while (c= *p++) (fastab+COFF)[c] |= SB; 1056 # if gcos 1057 p="\n\"'`\\"; 1058 # else 1059 p="\n\"'\\"; 1060 # endif 1061 while (c= *p++) (fastab+COFF)[c] |= QB; 1062 p="*\n"; while (c= *p++) (fastab+COFF)[c] |= CB; 1063 (fastab+COFF)[warnc] |= WB; 1064 (fastab+COFF)['\0'] |= CB|QB|SB|WB; 1065 for (i=ALFSIZ; --i>=0; ) slotab[i]=fastab[i]|SB; 1066 p=" \t\013\f\r"; /* note no \n; \v not legal for vertical tab? */ 1067 while (c= *p++) (toktyp+COFF)[c]=BLANK; 1068 #if scw2 1069 for ((t23+COFF)[i=ALFSIZ+7-COFF]=1; --i>=-COFF; ) 1070 if (((t23+COFF)[i]=(t23+COFF+1)[i]<<1)==0) (t23+COFF)[i]=1; 1071 #endif 1072 1073 # if unix 1074 fnames[ifno=0] = ""; dirnams[0]=dirs[0]="."; 1075 # endif 1076 # if ibm 1077 fnames[ifno=0] = ""; 1078 # endif 1079 # if gcos 1080 if (inquire(stdin, _TTY)) freopen("*src", "rt", stdin); 1081 # endif 1082 # if gimpel || gcos 1083 fnames[ifno=0] = (char *)inquire(stdin, _FILENAME); 1084 dirnams[0] = dirs[0] = trmdir(copy(fnames[0])); 1085 # endif 1086 for(i=1; i<argc; i++) 1087 { 1088 switch(argv[i][0]) 1089 { 1090 case '-': 1091 # if gcos 1092 switch(toupper(argv[i][1])) { /* case-independent on GCOS */ 1093 # else 1094 switch(argv[i][1]) { 1095 # endif 1096 case 'M': mflag++; 1097 case 'P': pflag++; 1098 case 'E': continue; 1099 case 'R': ++rflag; continue; 1100 case 'C': passcom++; continue; 1101 case 'D': 1102 if (predef>prespc+NPREDEF) { 1103 pperror("too many -D options, ignoring %s",argv[i]); 1104 continue; 1105 } 1106 /* ignore plain "-D" (no argument) */ 1107 if (*(argv[i]+2)) *predef++ = argv[i]+2; 1108 continue; 1109 case 'U': 1110 if (prund>punspc+NPREDEF) { 1111 pperror("too many -U options, ignoring %s",argv[i]); 1112 continue; 1113 } 1114 *prund++ = argv[i]+2; 1115 continue; 1116 case 'I': 1117 if (nd>8) pperror("excessive -I file (%s) ignored",argv[i]); 1118 else dirs[nd++] = argv[i]+2; 1119 continue; 1120 case '\0': continue; 1121 default: 1122 pperror("unknown flag %s", argv[i]); 1123 continue; 1124 } 1125 default: 1126 if (fin==STDIN) { 1127 if (0>(fin=open(argv[i], READ))) { 1128 pperror("No source file %s",argv[i]); exit(8); 1129 } 1130 fnames[ifno]=copy(argv[i]); 1131 infile=copy(argv[i]); 1132 dirs[0]=dirnams[ifno]=trmdir(argv[i]); 1133 # ifndef gcos 1134 /* too dangerous to have file name in same syntactic position 1135 be input or output file depending on file redirections, 1136 so force output to stdout, willy-nilly 1137 [i don't see what the problem is. jfr] 1138 */ 1139 } else if (fout==stdout) { 1140 if (NULL==(fout=fopen(argv[i], "w"))) { 1141 pperror("Can't create %s", argv[i]); exit(8); 1142 } else fclose(stdout); 1143 # endif 1144 } else pperror("extraneous name %s", argv[i]); 1145 } 1146 } 1147 1148 if (mflag) { 1149 if (infile==(char *)0) { 1150 fprintf(stderr, 1151 "no input file specified with -M flag\n"); 1152 exit(8); 1153 } 1154 tf=(char *)rindex(infile, '.'); 1155 if (tf==0) { 1156 fprintf(stderr, "missing component name on %s\n", 1157 infile); 1158 exit(8); 1159 } 1160 tf[1]='o'; 1161 tf=(char *)rindex(infile, '/'); 1162 if (tf!=(char *)0) 1163 infile = tf + 1; 1164 mout=fout; 1165 if (NULL==(fout=fopen("/dev/null", "w"))) { 1166 pperror("Can't open /dev/null"); 1167 exit(8); 1168 } 1169 } 1170 fins[ifno]=fin; 1171 exfail = 0; 1172 /* after user -I files here are the standard include libraries */ 1173 # if unix 1174 dirs[nd++] = "/usr/include"; 1175 # endif 1176 # if gcos 1177 dirs[nd++] = "cc/include"; 1178 # endif 1179 # if ibm 1180 # ifndef gimpel 1181 dirs[nd++] = "BTL$CLIB"; 1182 # endif 1183 # endif 1184 # ifdef gimpel 1185 dirs[nd++] = intss() ? "SYS3.C." : "" ; 1186 # endif 1187 /* dirs[nd++] = "/compool"; */ 1188 dirs[nd++] = 0; 1189 defloc=ppsym("define"); 1190 udfloc=ppsym("undef"); 1191 incloc=ppsym("include"); 1192 elsloc=ppsym("else"); 1193 eifloc=ppsym("endif"); 1194 ifdloc=ppsym("ifdef"); 1195 ifnloc=ppsym("ifndef"); 1196 ifloc=ppsym("if"); 1197 lneloc=ppsym("line"); 1198 identloc=ppsym("ident"); /* Sys 5r3 compatibility */ 1199 for (i=sizeof(macbit)/sizeof(macbit[0]); --i>=0; ) macbit[i]=0; 1200 # if unix 1201 ysysloc=stsym("unix"); 1202 # endif 1203 # if gcos 1204 ysysloc=stsym ("gcos"); 1205 # endif 1206 # if ibm 1207 ysysloc=stsym ("ibm"); 1208 # endif 1209 # if pdp11 1210 varloc=stsym("pdp11"); 1211 # endif 1212 # if vax 1213 varloc=stsym("vax"); 1214 # endif 1215 # if interdata 1216 varloc=stsym ("interdata"); 1217 # endif 1218 # if tss 1219 varloc=stsym ("tss"); 1220 # endif 1221 # if os 1222 varloc=stsym ("os"); 1223 # endif 1224 # if mert 1225 varloc=stsym ("mert"); 1226 # endif 1227 # if mc68000 1228 varloc=stsym("mc68000"); 1229 # endif 1230 # if sun 1231 varloc=stsym("sun"); 1232 # endif 1233 ulnloc=stsym ("__LINE__"); 1234 uflloc=stsym ("__FILE__"); 1235 1236 tf=fnames[ifno]; fnames[ifno]="command line"; lineno[ifno]=1; 1237 cp2=prespc; 1238 while (cp2<predef) stsym(*cp2++); 1239 cp2=punspc; 1240 while (cp2<prund) { 1241 if (p=strdex(*cp2, '=')) *p++='\0'; 1242 lookup(*cp2++, DROP); 1243 } 1244 fnames[ifno]=tf; 1245 pbeg=buffer+NCPS; pbuf=pbeg+BUFSIZ; pend=pbuf+BUFSIZ; 1246 1247 trulvl = 0; flslvl = 0; 1248 lineno[0] = 1; sayline(START); 1249 outp=inp=pend; 1250 control(pend); 1251 return (exfail); 1252 } 1253